c) technical requirements (ert) 4) power supply system …

C) TECHNICAL REQUIREMENTS (ERT)

4) POWER SUPPLY SYSTEM (POW)

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Table of Contents

4 CHAPTER 4 POWER SUPPLY SYSTEM ............................................................................................................ 1

OVERVIEW .......................................................................................................................................................1 4.1.1 34.5kV Traction Power Supply (TPS) Distribution System ........................................................... 2

4.1.2 34.5kV Non-Traction Power Supply (NTPS) Distribution System ................................................ 2

4.1.3 Depot Power Distribution System .................................................................................................. 3

4.1.4 Changeover Sequences ................................................................................................................... 3

4.1.5 Note to Bidders ............................................................................................................................... 3

4.1.6 MMSP: P.O. Section Feeding Arrangement ................................................................................. 12

4.1.7 MMSP: Remain Sections (Final Phase) ........................................................................................ 13

4.1.8 34.5kV Incoming Feeder Capacity (Note to Contractor) .............................................................. 13

4.1.9 Voltage Variations ........................................................................................................................ 13

4.1.10 Frequency Variations .................................................................................................................... 14

4.1.11 Harmonics ..................................................................................................................................... 14

4.1.12 Operation Requirements ............................................................................................................... 14

4.1.13 Environmental Data ...................................................................................................................... 15

SCOPE OF WORKS ........................................................................................................................................ 15 4.2.1 General .......................................................................................................................................... 15

DEFINITION AND ABBREVIATIONS ......................................................................................................... 20 4.3.1 Definitions .................................................................................................................................... 20

4.3.2 Abbreviations ................................................................................................................................ 22

DESIGN CRITERIA AND STANDARDS ...................................................................................................... 24 4.4.1 Design Criteria .............................................................................................................................. 24

4.4.2 Proven Design ............................................................................................................................... 25

4.4.3 Adequate Margin .......................................................................................................................... 25

4.4.4 Applicable Standards and Code of Practices ................................................................................ 25

SYSTEM REQUIREMENTS ........................................................................................................................... 29 4.5.1 General .......................................................................................................................................... 29

4.5.2 Earthing, Bonding and Lightning Protection ................................................................................ 31

4.5.3 Grounding (Earthing) System ....................................................................................................... 32

4.5.4 Tunnel Lighting and Outlets ......................................................................................................... 32

4.5.5 Electro-Magnetic Compatibility (EMC) and Electro-Magnetic Interference (EMI)..................... 32

4.5.6 Environmental EMC ..................................................................................................................... 33

4.5.7 System Studies Requirements ....................................................................................................... 33

4.5.8 Traction Power Supply Studies ..................................................................................................... 34

4.5.9 Earthing Bonding Lightning and Stray Current Studies ............................................................... 34

4.5.10 SCADA Studies ............................................................................................................................ 35

DESIGN AND CALCULATION REQUIREMENTS ..................................................................................... 35

4.6.1 General .......................................................................................................................................... 35

4.6.2 115kV/34.5kV Grid Main Power Transformer Capacities ........................................................... 35

4.6.3 Traction Simulation Calculations ................................................................................................. 35

4.6.4 Simulation Study Input Requirements .......................................................................................... 36

4.6.5 Simulation Study Output Requirements ....................................................................................... 36

4.6.6 Distribution (Non-Traction) Load Study Requirements ............................................................... 37

4.6.7 Validation of the Design Calculations .......................................................................................... 37

4.6.8 Design and Construction of 115kV/34.5kV Bulk Supply Substations ......................................... 37

4.6.9 Design and Testing Approvals ...................................................................................................... 37

4.6.10 Bulk Supply Substation (BSS) Requirements ............................................................................... 38

4.6.11 Bulk Supply Substation System Configuration and Operation ..................................................... 39

4.6.12 MERALCO Scope of Work .......................................................................................................... 39

4.6.13 CP106 Scope of Work .................................................................................................................. 40

4.6.14 Types of Bulk Supply Substations and their Constraints .............................................................. 40

4.6.15 Demarcations & Interface between MERALCO and CP106 ........................................................ 41

4.6.16 115/34.5kV Grid Main Power Transformers ................................................................................ 41

4.6.17 Site Responsibility Schedule......................................................................................................... 41

4.6.18 MERALCO and CP106 Earth Grid Systems ................................................................................ 41

4.6.19 Small Power or Low Voltage Power Requirements at BSSs ........................................................ 41

4.6.20 Metering Requirements ................................................................................................................. 41

4.6.21 115/34.5kV Main Transformer Protection .................................................................................... 42

4.6.22 34.5kV GIS Bus Bar Protection .................................................................................................... 42

4.6.23 34.5kV GIS Outgoing Feeder Protection ...................................................................................... 42

4.6.24 Transformer Alarms ...................................................................................................................... 43

4.6.25 Battery Charger Alarms ................................................................................................................ 43

POWER SUPPLY SYSTEM DESIGN REQUIREMENTS ............................................................................ 43 4.7.1 General .......................................................................................................................................... 43

4.7.2 115kV System ............................................................................................................................... 45

4.7.3 34.5kV System .............................................................................................................................. 45

4.7.4 DC Traction Power System .......................................................................................................... 46

CHARACTERISTICS OF THE MAIN ELECTRICAL EQUIPMENT .......................................................... 47 4.8.1 General .......................................................................................................................................... 47

4.8.2 115kV Bulk Supply Substation ..................................................................................................... 47

4.8.3 Overhead Contact System (OCS) Supply ..................................................................................... 48

4.8.4 Traction Substation (TSS) Equipment .......................................................................................... 48

4.8.5 Station Substation (SSS) Equipment ............................................................................................ 65

4.8.6 34.5kV Ring Main Units (RMUs) ................................................................................................ 65

4.8.7 Dry Type Transformer (Delta-Star) for Depot and Main Line ..................................................... 65

4.8.8 Operation transformers ................................................................................................................. 67

4.8.9 400V LVAC Switchboards ........................................................................................................... 67

4.8.10 Emergency Power Supply System ................................................................................................ 67

4.8.11 Emergency Tripping System......................................................................................................... 68

4.8.12 Protection Control and Monitoring ............................................................................................... 68

4.8.13 Protection for 34.5kV Network..................................................................................................... 70

4.8.14 Protections for 1500V DC System ................................................................................................ 70

4.8.15 Income from Rectifier ................................................................................................................... 71

4.8.16 Feeders to OCS ............................................................................................................................. 72

4.8.17 Other Protection ............................................................................................................................ 72

4.8.18 Status Supervision ........................................................................................................................ 72

4.8.19 Measurements ............................................................................................................................... 73

CABLES ........................................................................................................................................................... 74 4.9.1 General .......................................................................................................................................... 74

4.9.2 Voltage Cable Ratings .................................................................................................................. 74

4.9.3 Cable for 115kV and 34.5kV System ........................................................................................... 74

4.9.4 1500V DC Power Cable ............................................................................................................... 75

4.9.5 Cable for Low Voltage (LV) Distribution .................................................................................... 75

4.9.6 Cable Cross Section Determination .............................................................................................. 76

4.9.7 Optical Fibre Cable for Inter-Tripping Devices ............................................................................ 76

4.9.8 Twisted Pair Cable ........................................................................................................................ 77

4.9.9 Cable Routes and Cable Racks ..................................................................................................... 77

4.9.10 Installation of Cables .................................................................................................................... 77

4.9.11 Drawings for Review .................................................................................................................... 77

SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA) .......................................................... 78 4.10.1 Overview ...................................................................................................................................... 78

4.10.2 Applicable Design Standards ........................................................................................................ 79

4.10.3 Qualifications of Equipment Manufacturer and Providers ........................................................... 79

4.10.4 Design Reliability ......................................................................................................................... 79

4.10.5 Main Operating Facilities ............................................................................................................. 81

4.10.6 Control and Monitoring Items of Power Supply System .............................................................. 81

4.10.7 Event Record ................................................................................................................................ 82

4.10.8 Alarms .......................................................................................................................................... 83

4.10.9 Response Times ............................................................................................................................ 83

4.10.10 Noise ............................................................................................................................................. 84

4.10.11 Interface Requirement ................................................................................................................... 84

4.10.12 Backup Operating Facilities .......................................................................................................... 85

4.10.13 Power Supplies ............................................................................................................................. 85

4.10.14 Power SCADA (P SCADA) Requirements .................................................................................. 85

4.10.15 Power SCADA (P SCADA) Distribution and Operation Control Centre (OCC) ......................... 86

4.10.16 SCADA Architecture .................................................................................................................... 89

DOCUMENTS REQUIRED FROM CONTRACTOR .................................................................................... 90 4.11.1 General .......................................................................................................................................... 90

4.11.2 Drawings for review ..................................................................................................................... 92

INSTALLATION REQUIREMENTS ............................................................................................................. 92 4.12.1 General .......................................................................................................................................... 92

4.12.2 Specific Requirements .................................................................................................................. 93

4.12.3 Construction and Installation Plan ................................................................................................ 93

4.12.4 Temporary Works ......................................................................................................................... 94

4.12.5 Quality Management..................................................................................................................... 94

INTERFACE REQUIREMENTS .................................................................................................................... 94 4.13.1 Internal Interfaces ......................................................................................................................... 94

4.13.2 Interface with Government Agencies ........................................................................................... 95

4.13.3 Joint Testing and Closure Report of Interfaces ............................................................................. 96

4.13.4 Contractor’s Responsibility .......................................................................................................... 96

4.13.5 Interface Control Sheet ................................................................................................................. 96

TESTING AND COMMISSIONING REQUIREMENTS ............................................................................... 96 4.14.1 General .......................................................................................................................................... 96

4.14.2 Contractor’s Responsibilities for On-Site Testing ........................................................................ 97

4.14.3 Installation Tests ........................................................................................................................... 99

4.14.4 Partial Acceptance Tests ............................................................................................................. 101

4.14.5 System Acceptance Tests ............................................................................................................ 101

4.14.6 Integrated Testing and Commissioning ...................................................................................... 102

4.14.7 Trial Operation ............................................................................................................................ 103

4.14.8 Performance Verification ............................................................................................................ 103

4.14.9 Indicative List of Tests ............................................................................................................... 103

4.14.10 EMI Levels ................................................................................................................................. 104

4.14.11 The Required On-Site Tests shall be as Followed: ..................................................................... 104

RELIABILITY, AVAILABILITY, MAINTAINABILITY, SAFETY (RAMS) ........................................... 105 4.15.1 Power Supply System and OCS .................................................................................................. 105

4.15.2 Maintainability ............................................................................................................................ 105

4.15.3 Availability ................................................................................................................................. 105

4.15.4 Safety and Reliability.................................................................................................................. 105

4.15.5 Safety Target ............................................................................................................................... 105

4.15.6 Safety Requirements ................................................................................................................... 105

4.15.7 Risks on Functional Safety ......................................................................................................... 106

4.15.8 Single Point Failure .................................................................................................................... 106

4.15.9 Interface with SCADA ................................................................................................................ 107

4.15.10 Maintenance Regime .................................................................................................................. 107

4.15.11 Failure Mode Effects, and Criticality Analysis ........................................................................... 107

4.15.12 Safety Testing and Analysis........................................................................................................ 107

4.15.13 Safety Interlocking ...................................................................................................................... 107

4.15.14 Safety Integrity Level (SIL) ........................................................................................................ 107

4.15.15 Wire and Cable Identification ..................................................................................................... 108

4.15.16 Environmental Compliance ........................................................................................................ 108

GENERAL REQUIREMENTS OF MEASURING AND SPECIAL TOOLS ............................................... 108 4.16.1 General ........................................................................................................................................ 108

4.16.2 General Requirements of Consumable and Spare Parts .............................................................. 108

4.16.3 Training Requirements ............................................................................................................... 109

4.16.4 Training of Operation and Maintenance Staff ............................................................................ 109

4.16.5 Maintenance Requirements ......................................................................................................... 110

PACKING, SHIPPING, STORAGE AND DELIVERY ................................................................................ 112 4.17.1 Packing ....................................................................................................................................... 112

4.17.2 Storage ........................................................................................................................................ 112

4.17.3 Delivery ...................................................................................................................................... 112

List of Tables Table 1: Installed Capacity proposed for P.O. Section - Depot ................................................................... 12 Table 2: Installed Capacity proposed for P.O. Section – Main Line ........................................................... 12 Table 3: Location of Traction Substation (TSS) and Depot Area ............................................................... 15 Table 4: Location of Station Substation (SSS) and relate equipment to be installed .................................. 16 Table 5: Definitions of Terms ..................................................................................................................... 20 Table 6: Abbreviations Used ....................................................................................................................... 22 Table 7: Rectifier Rating ............................................................................................................................. 51 Table 8: Rectifier Transformer Rating ........................................................................................................ 53 Table 9: High Speed DC Switchgear Ratings.............................................................................................. 57 Table 10: Dry Transformer Characteristics ................................................................................................. 66

List of Figures Figure 1: Depot Feeding Arrangement for P.O. Section. .............................................................................. 4 Figure 2: Depot Layout and HV Power Cable Routes .................................................................................. 5 Figure 3: Traction Power Supply Feeding Arrangement with ESS (Option 2A) .......................................... 6 Figure 4: Traction Power Supply System Feeding Arrangement (Option 2B) .............................................. 7 Figure 5: Non-Traction (Distribution) Power System Feeding Arrangement ............................................... 8 Figure 6: Station Locations ........................................................................................................................... 9 Figure 7: Metro Manila Subway Route Map ............................................................................................... 10 Figure 8: Typical Tunnel Cross Section ...................................................................................................... 11

METRO MANILA SUBWAY PROJECT PHASE 1 Part 2 - Employer’s Requirements Package: CP 106: E&M Systems and Track Works Section VI

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4 CHAPTER 4 POWER SUPPLY SYSTEM

OVERVIEW

Electrical power for the operation of the Metro Manila Subway System (MMSP) Project shall be supplied by Manila Electricity and Railway Company (MERALCO) through the two Bulk Supply Substation (BSSs) located at either end of the railway line; at the Depot and in the area close to Lawton West respectively. The incoming power at each of these two substations shall be supplied through two 115kV overhead feeders, which for redundancy purposes shall be supplied from two different sources of the MERALCO 115kV Grid Network. The two incoming 115kV feeders shall be terminated into the MERALCO 115kV Gas Insulated Switchgear (GIS) room, which in turn shall supply power directly to the two 115kV/34.5kV, 60MVA step down Grid Main Power Transformers. The 34.5kV output power from the Grid Main Power Transformers shall then be fed into the 34.5kV (GIS) for downstream distribution of traction and non-traction power to Traction and Distribution substations respectively.

An overview of the complete Metro Manila Subway Project (MMSP) high voltage power distribution system is given in Figure 1, Figure 3, Figure 4 and Figure 5 for Depot, Traction and Non-Traction (Distribution) Feeding Arrangements.

Each traction substation (TSS) and Station Substation (SSS) shall receive two separate 34.5kV circuits from both Bulk Supply Substations (BSS) to be located at Depot and in the region of Lawton West. This is then distributed around the Metro Manila Subway Project (MMSP) in a Ring Main fashion to each Traction Substation (TSS) and Station Substation (SSS) located at the stations on the Main Line and in the Depot.

The Traction Substations (TSS) that will transform and rectify the supply from AC to DC and distribute Traction Power (TP) at 1500 Volts Direct Current (VDC) via Transformer/Rectifier Unit to the Overhead Contact Line that provides electrical power for the trains.

The Station Substations (SSS) will transform from 34.5kV to 400V AC, three phases via 34.5kV / 400V distribution transformers located at each station and that will distribute to single phase Low Voltage (LV) 230V LVAC to provide supply including E&M power equipment, Communications, Signalling, Platform Screen Doors (PSD), Lifts and any other LV power requirements. However, these will be undertaken by the Civil Contractors.

The BSS located at Depot is required to be built and ready to bring into in service to provide power supply to CP101 Partial Operative (P.O) Section to supply the power to the trains and stations via Traction substations (TSSs), Station Substations (SSSs) for the Main Line and Depot, respectively.

Acquisition Supervisory Control and Data Acquisition (SCADA) system with the operators control equipment, mimic diagrams and relevant displays installed in the Operations Control Centre (OCC) located in the Depot and a future Backup Control Centre (BCC) may be installed in the BSS located in the region of Lawton West location. The actual location of BCC shall be identified and confirmed at the detailed design stage.

In addition, a Substation Automation System (SAS) that integrates directly with the OCC and with future BCC equipment shall be installed in the region of Lawton West (to be confirmed), with local control at each SSS and TSS via Remote Terminal Units (RTUs).

In general, the typical spacing between traction substation (TSSs) are installed at an interval of 3 to 5km for 1500V DC, however at this stage of design four TSSs (one for Depot and three for main line) were estimated to be installed for the CP101 (P.O. Section) of MMSP Line.

The number of TSSs shall be determined through train simulation study based on Rolling Stocks, track profile, operations plan and operational scenarios. The contractor shall undertake the detailed performance train simulation studies to determine the actual number of TSSs required to be installed on the MMSP.


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Station Substations (SSSs) for Non-Traction Power Supply shall be installed at each station for the power supply to station facilities. Moreover, emergency generator will be also installed at ground level at each station to back up the emergency loads should the main power supplies fail. However, the Contractors shall also consider and verify the emergency loads to minimise the number of emergency generators installed at each station, meaning if one generator can supply the emergency loads of more than one station.

4.1.1 34.5kV Traction Power Supply (TPS) Distribution System

The Traction Power Supply (TPS) are directly received from two independent 34.5kV supply circuits from Bulk Supply Substations, fed from both ends i.e. from BSS in Depot and BSS in the region of Lawton West.

The 34.5kV AC incoming feeders are then in turn connected to the TSSs and distributed to the whole network installed on the Main Line and Depot, in the Ring format to complete as a loop.

Each TSS will receive 34.5kV power supply from a redundant network as an alternative supply to secure and maintain their operation even if one of the networks is out of service.

All TSSs are designed and supplied to support the ultimate capacity operation of the MMSP system (10-car train 5Tc and 5Mc, 2 minutes headway).

The Traction Power Supply at each TSS shall then convert 34.5kV AC to 1500V DC to provide power to the OCS with DC traction supply at a nominal 1500V DC and return shall be via the running rails and return current cables.

The 1500V DC Traction Power Substations shall include but not limited to rectifier transformers, rectifiers, high speed circuit breakers, associated switches, protection, earthing, negative return panels and any other item required to complete the work.

Incoming Circuit Breakers (CB) of the single pole High Speed Circuit Breakers (HSCB) type shall be installed between the rectifier group and 1500V DC Positive busbars and shall be interlocked with the traction transformer incoming CB.

For connecting the negative terminals of the rectifiers with negative busbars, motorized off-load switches, interlocked with corresponding HSCB & Disconnector Switches shall be provided.

From the 1500V DC positive busbar, feeder HSCB & DC disconnector switches shall be provided to feed power to the OCS.

The Traction Power Substations shall be designed to install with the Energy Storage System (ESS) using an advanced technology battery system to capture and convert the disposal energy waste from the trains during train’s regenerative braking to feed back to the Traction Power Supply system (see also section 4.1.5).

4.1.2 34.5kV Non-Traction Power Supply (NTPS) Distribution System

Like the Traction Power Supply, the 34.5kV Non-Traction Power Supply is to provide the power supply to Station and E&M Loads. Two 34.5kV independent circuits are directly received from Bulk Supply Substations. This is then distributed to 34.5kV Ring Main Unit (RMU) circuit located at each Station Substation (SSS) on the Main Line. The 34.5kV distribution network consists of loop main power cable which supply to the adjacent Station Substations (SSS) on the Main Line.

At each SSS, two off 34.5kV/400V distribution transformers shall be installed to provide station facility power. Moreover, emergency diesel generator will be installed at station at ground level. Contractor shall interface with Civil Contractors and other third parties for the cable route to 400V LVAC switchboards.


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The 34.5kV system is designed to ensure that voltage regulation under normal feeding is maintained within +/-10% of nominal voltage. Contractor is advised to check the voltage regulation to ensure that it is compliant with the Power Utility Provider MERALCO.

All the 34.5kV switchgear and 34.5kV Ring-Main Unit (RMU) systems are to be designed and supplied to support the ultimate capacity operation of the MMSP system (10-car train: 5Mc & 5Tc 2 minutes headway) and the total loads required for station that are being specified by Civil Contractors, for TSS and SSS respectively.

Contractor shall carry out the detailed studies taken into consideration of various scenarios operations to decide the ‘Open Point’ required on the 34.5kV Ring Circuits for TSS, SSS and Depot. However, the contractor shall also carry out studies to determine the single end feed if it is achievable for ultimate capacity operation of the MMSP system (10-car train: 5Mc & 5Tc, 2 minutes headway).

4.1.3 Depot Power Distribution System

Similarity, for the Station Power Supply named ‘Non-Traction’, installed on the main line: Two separate supply 34.5kV circuits being supplied from Bulk Supply Substations and fed to 34.5kV Ring Main Units (RMU) via circuit breakers. This is then distributed to 34.5kV Ring Main Units (RMU) circuit located at Operation Control Centre (OCC), Workshop, Training Centre, Distribution Boards namely DB1 and DB2, Philippine Railway Institute (PRI) and Light Repair Shop within Depot area.

Each location also receives 34.5kV power supply from a redundant network as an alternative supply to secure and maintain their operation. DC Traction Power Supply shall also be backed up from main line.

The 34.5kV/400V distribution transformers to provide at each location for facility power (see table 1 below). Moreover, emergency generator also will be installed at three locations namely: Operation Control Centre (OCC), Training Centre and Philippine Railway Institute (PRI), for emergency loads.

Note to Contractor: It is of interest and priority of Client’s wishes to bring in the Philippine Railway Institute (PRI) being constructed into service as soon as possible.

4.1.4 Changeover Sequences

Contractor CP106 shall consider the design taken into consideration of migration of 34.5kV Rings when migrate from P.O. Section to the Remaining Sections and to minimise the power supply disruption. The changeover sequences shall be designed in detail with appropriate adequate protections.

4.1.5 Note to Bidders

a) The preference of MMSP for the Traction Power Supply is to install the Energy Storage System (ESS) using an advanced technology battery system to capture and convert the disposal energy waste from the trains during train’s regenerative braking to feed back to the Traction Power Supply system. This shall be also for the benefit of saving energy, reduction of operating costs and environmental consideration.

Bidder(s), who are not able to provide Energy Storage System (ESS) using an advanced technology battery system, may then propose an alternative option which can be discussed during negotiation stage.

b) At present as shown in the conceptual design both FTI and Bicutan station are an interchange stations with NSRP-S project. MMSP Trains shall operate on NSRP-S from Bicutan station to NSRP-S terminal station ‘Calamba station’. The interface between power supply system of MMSP and NSRP-S shall remain at Bicutan station. The Contractor is responsible for the development of the concept and detailed design to demonstrate interoperability between MMSP and NSRP-S for the Engineer acceptance and Employer approval.


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Figure 1: Depot Feeding Arrangement for P.O. Section.


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Figure 2: Depot Layout and HV Power Cable Routes


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Figure 3: Traction Power Supply Feeding Arrangement with ESS (Option 2A)


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Figure 4: Traction Power Supply System Feeding Arrangement (Option 2B)


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Figure 5: Non-Traction (Distribution) Power System Feeding Arrangement


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Figure 6: Station Locations


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Figure 7: Metro Manila Subway Route Map


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Figure 8: Typical Tunnel Cross Section


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4.1.6 MMSP: P.O. Section Feeding Arrangement

Refer to Fig. 1 above and Table 1 and Table 2 below summarized the scope of P.O. section.

Table 1: Installed Capacity proposed for P.O. Section - Depot

No. Description TSS

Installed

Capacity

Workshop

Installed

Capacity

400V LVAC,

5000A, 3-Ph, 4W,

60Hz

Switchboard***

Gen. Set

Installed

Capacity

1 Bulk Supply Substation

Grid Main Power

Transformers

2 x

60MVA*

- - -

2 Depot TSS 2 x 4MW** - -

3 Operation Control Centre

(OCC)

2 x 2000kVA 1 1000kVA

4 Workshop 2000kVA 1 -

5 Training Centre (TC) 1000kVA 1 200kVA

6 Distribution Board (DB2) 500kVA 1 -

7 Philippine Railway

Institute (PRI)

2 x 2000kVA 1 500kVA

8 Distribution Board (DB1) 500kVA 1 -

9 Light Repair Workshop 1000kVA 1 -

Table 2: Installed Capacity proposed for P.O. Section – Main Line

No. Description TSS

Installed

Capacity

Energy

Storage

System

ESS

SSS

Installed

Capacity

400V LVAC,

5000A, 3-Ph,

4W, 60Hz

Switchboard***

Gen. Set

Installed

Capacity

1 Quirino Highway

TSS

2 x 4MW** MW** - - -

2 Quirino Highway

SSS

- 2 x 2500kVA 1 1000kVA

3 Tandang Sora TSS 2 x 4MW** MW** - - -

4 Tandang Sora SSS - 2 x 2500kVA 1 1000kVA

5 North Avenue TSS 2 x 4MW** MW** - - -

6 North Avenue SSS - 2 x 3500kVA 1 1000kVA


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Note & Keys:

* Contractor to verify and confirm the actual required capacity MVA for Main Transformers to be installed at Bulk Supply Substations to support the ultimate capacity operation of the MMSP system (10-car train, 2 min headway) and E&M Loads specified by Civil Contractors.

** Transformer Rectifier Unit (TRU) at TSS comprised of 4.2MVA for Traction Transformer and 4 MW Rectifier. Contractor shall carry out the detailed simulation studies to verify the TRU capacity.

Contractor shall also carry out the detailed studies to assess the capacity of ESS during trains regenerative braking to assess the capacity of ESS require to install at the TSS. Also confirm if ESSs capacity are of adequate capacity to replace the rectifier unit (as OPTION 2B shown in Fig. 4).

*** CP101 Scope.

Note: The Contractor shall undertake the detailed studies to confirm of the required installed capacity for all the above equipment to support the ultimate capacity operation of the MMSP system (10-car train comprised of 5Tc and 5Mc, 2 min headway) and E&M Loads specified by Civil Contractors.

4.1.7 MMSP: Remain Sections (Final Phase)

The second Bulk Supply Substation (BSS) at Lawton West including all TSSs and SSSs to be built for the Remaining Sections (Final Phase) to provide the power supplies and ready to bring in the service of the complete MMSP Line.

Refer to Fig. 3, Fig. 4 and Fig. 5 above titled “Traction Major Line Feeding Arrangement and Non-Traction Major Line Feeding Arrangement” indicate the number of TSSs and SSSs shall be built at the Final Phase. Migration from P.O. Section to Final Phase shall be prepared in detailed stages sequence to ensure the maintain of power supply.

The Contractor shall take the full responsible for the complete design and build of MMSP and interface with all other main principle Civil Contractors, Power Supply Utility Provider MERALCO and any other third parties.

Number of TSSs and SSSs shown in Fig. 1, 3, 4 & 5 shall be assessed, verified in Contractor’s detailed studies to confirm the ratings and sizing of the equipment to be installed in each TSS and SSS are of adequate capacity to support the ultimate capacity operation of the MMSP system (10-car train, 2 minutes headway) and the station loads required that are being specified by Civil Contractors.

4.1.8 34.5kV Incoming Feeder Capacity (Note to Contractor)

Reference to Power Supply Utility Provider MERALCO confirmed that the ‘allowance capacity’ of each 34.5kV Income Feeder fed from 115kV/34.5kV Bulk Supply Substation to MMSP Traction Substation (TSS) and Station Substation (SSS) is 28MVA max per circuit. However, the maximum design allowance of each circuit is to be 70% of 28MVA. Contractor shall carry out the detailed studies to verify the feeding arrangement of each ring, as shown in Fig. 1, 3, 4 & 5: Traction Ring, Non-Traction Ring and Depot to ensure the load are evenly spread taken into consideration of voltage drop, fault level, load flow etc. for both normal operation and degrade modes to support the ultimate capacity operation of the MMSP system (10-car train, 2 min headway).

4.1.9 Voltage Variations

Philippine Distribution Code 2017 Edition stated:

a) Under section 3.2.3.2 - A Short Duration Voltage Variation shall be defined as a variation of the RMS value of the voltage from nominal Voltage for a time greater than one-half cycle of the power Frequency but not exceeding 1 minute. A Short Duration Voltage Variation is a Voltage Swell if the RMS value of the Voltage increases to between 110% and 180% of the nominal value. A Short Duration Voltage


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Variation is a Voltage Sag (or Voltage Dip) if the RMS value of the Voltage decreases to between 10% and 90% of the nominal value.

b) Under section 3.2.3.3 - A Long Duration Voltage Variation shall be defined as a variation of the RMS value of the Voltage from nominal Voltage for a time greater than 1 minute. A Long Duration Voltage Variation is an Undervoltage if the RMS value of the Voltage is less than or equal to 90% of the nominal Voltage. A Long Duration Voltage Variation is an Overvoltage if the RMS value of the Voltage is greater than or equal to 110% of the nominal value.

4.1.10 Frequency Variations

Philippine Distribution Code 2017 Edition stated:

a) Under section 3.2.2.1 - The nominal fundamental Frequency shall be 60 Hz.

b) Under section 3.2.2.2 - The Distribution Utility shall design and operate its System to assist the System Operator in maintaining the fundamental Frequency within the limits of 59.7 Hz and 60.3 Hz during normal conditions.

4.1.11 Harmonics

The harmonic voltages as a percentage of the light load (approx. 1 % of load) DC voltage shall be as specified in standards. Harmonic distortion at the points of common coupling shall be limited to ensure the power quality.

The power supply design shall comply with the maximum of total permissible voltage distortion of Local Electricity Authority MERALCO requirements for limitation of higher harmonics at the 34.5 kV termination points to the MERALCO Power Company's grid.

The maximum total permissible voltage distortion caused by higher harmonic elements shall be not exceed 5%. The Contractor shall supply all necessary filter plant to meet the above requirements if required.

4.1.12 Operation Requirements

Normal and Degraded Mode Requirements

The system shall be designed by Contractor to support the movement of ultimate maximum capacity transportation when it is planned to run 10 Car trains (5Mc + 5Tc) in both directions, at 2 minutes headways during peak periods. Operational scenarios that considered of trains bunching are to be studied for each scenario and under no case shall the track voltage exceed the voltage as specified in EN-50122.

Normal Operation

The rating of the Main Line TSSs shall be designed so that adequate power is supplied to the system, with all Substations operating, to maintain rated MMSP operating performance during peak-hour. The Depot and Main Line Substations shall be rated to provide adequate power to maintain normal operations of the rail vehicles within the Depot and Main Line facilities as defined under the operations plan.

Degraded Operation

Contingency/Degraded operation of the Main Line Traction Power Supply System occurs when any one traction power substation is out-of-service on the Main Line. The rating of the Main Line traction substation and other associated electrical equipment (including, OCS, Substation and OCS fittings and accessories, etc.) shall be designed so that adequate power is supplied to the system to maintain operation of the metro under degraded mode during peak-hour operating conditions until 2035 with 10 cars (5Mc & 5Tc) and 2 minutes headway.


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Under degraded operations, the DC feeder circuits and positive DC bus of the out-of-service Substation must remain in service to feed across the section break & act as a paralleling hut; and bypass-disconnect switches shall be installed to bridge the two section in the event that the positive DC feeders or bus are out-of-service.

Contract shall also perform the single end feed scenarios to assess the performance including if one of the Bulk Supply Substation is out of service and or maintenance to be carried out.

4.1.13 Environmental Data

Refer to General Requirements Specification (ERG) and Technical Requirements Specification (ERT) for the details of environmental data such as: climate conditions, rainfall, temperature, wind speed and direction, humidity and air quality.

SCOPE OF WORKS

4.2.1 General This specification sets out the requirements for the design, manufacturing, factory test, packing, delivery to site, installation, training and setting, testing, commissioning, interfacing works, spare part & special tools delivery and trial operation support for completing the Power Supply system under the Metro Manila Subway Project (MMSP) (Quirino Highway – Bicutan, Lawton East – T3) here under the project.

The works shall include but not limited to the following:

1. Two new 115kV/34.5kV GIS Bulk Supply Substations including 115kV Incoming Feeders and associated pilot protection cables.

2. Total thirteen (13) Traction Substations (TSSs), and one (1) Sectioning Post (SP) are planned to be constructed and locate at the following site locations, as shown in Table 3.

3. Total sixteen (16) Station Substations (SSS) are planned to be constructed and locate at the following site locations, as shown in Table 4.

4. Number of TSSs and SSSs are shown on the following Feeding Line Diagrams:

i) Partial Operative (P.O.) Section Feeding arrangement;

ii) Traction Major Line Feeding Arrangement (Final Phase); and

iii) Non-Traction Major Line Feeding Arrangement (Final Phase)

Table 3: Location of Traction Substation (TSS) and Depot Area

No. Substation Name Location TSS Installed

Capacity*

Energy Storage

System ESS

(see note 3)

Site

1 Depot TSS -2km 772 2 x 4MW MW (see note 3) At ground level

2 Quirino Highway TSS 0km 000 2 x 4MW Underground

3 Tandang Sora TSS 1km 711 2 x 4MW Ditto

4 North Avenue TSS 3km 886 2 x 4MW Ditto

5 East Avenue TSS 6km 938 2 x 4MW Ditto

6 Anonas TSS 9km 016 2 x 4MW Ditto


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7 Katipunan TSS 10km664 2 x 4MW Ditto

8 Ortigas North TSS 13km771 2 x 4MW Ditto

9 Kalayaan Avenue

TSS

17km139 2 x 4MW Ditto

10 Lawton East TSS 20km416 2 x 4MW Ditto

11 Lawton East SP 21km Approx. - Ditto

12 Lawton West TSS 22km145 2 x 4MW Ditto

13 FTI TSS 26km 110 2 x 4MW Ditto

14 T3 TSS 23km622 2 x 4MW Ditto

Notes & Keys:

* Transformer Rectifier Unit at TSS comprised of 4.2MVA for Traction Transformer and 4 MW Rectifier.

** Preliminary Information (see note 2).

*** Civil Contractors Scope.

1. Contractor CP106 shall carry out the detailed simulation studies to confirm the number of TSSs and the required of installed capacity at each TSS.

2. Contractor CP106 shall also liaise with various Civil Contractors for the confirmation of Station Loads in order to calculate the required installed capacity at each Station Substation and Emergency Loads for Diesel Generator capacity.

3. Contractor shall also carry out the detailed studies to assess the capacity of ESS during trains regenerative braking to assess the capacity of ESS require to install at each TSS. Also confirm if ESSs capacity are of adequate to replace the rectifier unit (as OPTION shown in Fig. 4).

Table 4: Location of Station Substation (SSS) and relate equipment to be installed

No. Station

Substation Name

Location SSS

Capacity**

400V LVAC,

5000A, 3-Ph,

4W, 60Hz

Switchboard***

Diesel Gen. Set

Capacity

Site

1 Quirino Highway

SSS

0km 000 2 x

1500kVA

1 1000kVA Underground

2 Tandang Sora SSS 1km 711 2 x

2500kVA

1 1000kVA ditto

3 North Avenue SSS 3km 886 2 x

2500kVA

1 1000kVA ditto

4 Quezon Avenue

SSS

5km 200 2 x

2500kVA

1 1000kVA ditto


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5 East Avenue SSS 6km 938 2 x

2500kVA

1 1000kVA ditto

6 Anonas SSS 9km 016 2 x

2500kVA

1 1000kVA ditto

7 Katipunan SSS 10km664 2 x

2500kVA

1 1000kVA ditto

8 Ortigas North SSS 13km771 2 x

2500kVA

1 1000kVA ditto

9 Ortigas South SSS 15km 031 2 x

2500kVA

1 1000kVA ditto

10 Kalayaan Avenue

SSS

17km139 2 x

2500kVA

1 1000kVA ditto

11 Bonifacio Global

City SSS

18km 204 2 x

2500kVA

1 1000kVA ditto

12 Lawton East SSS 20km416 2 x

2500kVA

1 1000kVA ditto

13 Lawton West SSS 22km145 2 x

2500kVA

1 1000kVA ditto

14 FTI SSS 26km 110 2 x

3000kVA

1 1000kVA ditto

15 T3 SSS 23km622 2 x

2500kVA

1 1000kVA ditto

16 Bicutan SSS 28km400 1 x

3000kVA

1 - ditto

All equipment installed in indoor areas shall be of permeation preventive structure for the prevention of water drops from ceiling. Regenerative power absorption device shall be provided for regenerative power absorption (see item 6). The design shall be based on the Contractor’s simulation and shall include but not limited to the capacity and location of the regenerative power absorption device.

5. Manila Electric Company (MERALCO) power connection works.

The work as described below shall be carried out by the Contractor but not limited as follow:

i) Design and built two (2) new 115kV/34.5kV, 60MVA substation namely ‘Bulk Supply Substation’ (BSS).

ii) Bring in and installation of two 115kV Incoming Feeder power cables and associated pilot protections and control cables fed from 115kV MERALCO GRID Substation.


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iii) Procurement and installation of all equipment but shall not be limited to the following:

• 115kV GIS;

• 34.5kV Switchgear;

• 115/34.5kV 60MVA Grid Main Power Transformer;

• 34.5kV/400V Auxiliary Transformer;

• 400V LVAC switchboard;

• Complete protections and control panels;

• Substation Automation System to IEC 60815;

• HV, LV and Fibre Optic Cablings;

• Earthing studies etc. and;

• Others.

6. Include in the scope of supply for the Contractor are Energy Storage System (ESS) that utilize storage battery control technology to capture and store surplus energy produced by the train’s regenerative braking system and enable to feed back into the Traction Power supply system as required. One ESS shall be installed at each TSS on the main line and one in the Depot TSS. Contractor CP106 to confirm the Option as shown on Feeding Line Diagrams.

7. Control of all electrical equipment will be via a Supervisory Control And Data Acquisition (SCADA) system with the operator control equipment, mimic diagrams and relevant displays installed in Operation Control Centre (OCC) located in the Depot. In addition, a Substation Automation System (SAS) that integrates directly with OCC located at the Depot and (future Back-Up Control BOCC location to be confirmed) shall be installed in each Bulk Supply Substation (BSS), with the local control at each TSS and SSS via Remote Terminal Units (RTU). SAS shall be designed to comply with IEC61850.

8. All communication between various parts of the Power SCADA system for the Power Supply System on MMSP shall be via the fibre optic cable Backbone Transmission Network (BTN) including the Local Area Network (LAN).

9. The complete cable network and cable support system up to connection in substations shall be carried out (except the cable trough/trench laid along the alignment in main line and all external cable containment in depot) by the Contractor which includes but shall not be limited to the following:

i) 34.5 kV cable to substation to cable terminal box (PCT box) including excavation, reclamation and all facilities;

ii) DC feeder cable network inside the TSS and SP;

iii) Connection of 34.5 kV cable, protection / control line (including power supply line), ITV control line / data line (including optical cable) between Bulk Supply Substation (BSS) and Traction Substation (TSS), Station Substation (SSS) and Depot;


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In the depot, 34.5 kV RMUs cables shall be installed in the buried pipe below ground level. The installation of buried pipes/ducts and the creation of manholes to suit 34.5kV cable sizes and routes shall be carried out by the Civil Contractor (CP101). Therefore, the Contractor CP106 shall coordinate with the Civil Contractor regarding the number, shape and size of buried pipes/ducts as well as cable routes details include manholes.

iv) Cabling for interlinked tripping between the BSS, TSSs and SSSs;

v) Cabling of Optical fibre cable for Power SCADA system. The Contractor shall coordinate with Interfacing Contractors and other Interfacing Parties with regard to the details including but not limited to cable type, size, routings and requirement for other contractors to provide cable trough/trench laid along the alignment in main line and all external cable containment in depot as well as installation of all other cable containment to be provided by the Contractor;

vi) Installation of support in own site to receive electricity;

vii) The Contractor shall coordinate with Interfacing Contractors and other interfacing parties regarding installation of the TSSs, SSSs and other equipment;

viii) TSSs, SSSs, SP and BSSs space preparation, levelling including necessary banking, building construction including utilities such as fire detection and/or ventilation, indoor and outdoor lighting, earthing equipment etc. will be designed and constructed by other Contractor(s). The Contractor needs to coordinate with them for the necessary requirements;

ix) Power SCADA System for TSSs, SSSs and Electric Rooms in main line and depot includes ITV supervising system for Depot TSS and Depot entrances and outdoor equipment. All communication between various parts of the SCADA system shall be via the fibre optic Transmission Network;

x) Protective provisions relating to electrical safety and earthing which includes but shall not be limited to earthing of equipment, cables and non-current carrying metallic components, etc.

xi) Resolution of interface issues with Interfacing Parties;

xii) Special tools and diagnostic equipment;

xiii) Spare parts and consumable;

xiv) Furniture, shock treatment charts, rubber mats, first aid boxes and danger notice plates; in TSS and electrical rooms on main line and depot;

xv) Documentation; and

xvi) Services.

10. Main Line Tunnel Lighting and Outlets for maintenance on the main line including associated Low Voltage (LV) cables.

11. The tasks to be carried out by the Contractor shall include but not limited to the following:

i) Review and approval of the Employer’s electrical engineer and of others, shall submit to the respective Employer’s engineers the design, supply, system quality management, installation, testing including integrated testing and commissioning of the complete electrical power supply system;

ii) Presentations, reviews and audit support as described in the General Specifications;


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iii) Interface management with interfacing contractors;

iv) Design inputs identification of locations for:

a) Concrete foundations for any equipment;

b) Floor cinder concrete;

c) Earthing busbar terminal and grounding rod for TSS, SSS and SP; and

d) Buried pipes, cable trench and hand holes for cable wiring.

v) System operations;

vi) Decommissioning, removal and/or disposal of temporary works; and

vii) Defects Notification Period of the Permanent Works after commissioning as stipulated in the Contract.

12. This Technical Specifications (TS) shall be read in conjunction with the Employer Requirements (ER), the General Conditions of Contract (GC), General Specifications (GS) and any other document forming part of the Contract. In the event of a conflict between the ER, GC and GS to the TS, the requirement of the TS shall prevail.

13. In the event of a conflict between the TS and any other standards or specifications quoted in the TS, the requirement of the TS shall prevail.

14. All information stated and drawings included in this Employer’s Requirement are based conceptual design for feasibility study and thus details shown on the drawings are for information only. The accuracy of preliminary details shown on the drawings cannot be guaranteed. The Contractor shall prepare the detailed design documents and drawings include all necessary studies to be carried out to achieve requirements of the TS.

DEFINITION AND ABBREVIATIONS

4.3.1 Definitions

In this Specification, the following defined terms shall be defined accordingly:

Table 5: Definitions of Terms

Cross-bonding The term used to describe cables used to electrically link parallel sets of running rails forming the traction return system together, to reduce voltage drop and leakage currents in a DC electrified traction ystem. or It is the type of bonding of HV cables to limit the sheath voltage.

Disconnecting Switch Mechanical switching device which ensures specified clearance for safety reasons in the open position, in order to maintain OCS facilities during night-time hours, to disconnect from a charged circuit at abnormal conditions such as a short circuit.

Earth Means the Conducting mass of the earth or any conductor in direct electrical connection with it.

Earthing The connection of equipment enclosure and non-current carrying metal parts to earth to provide safety to personnel, public and to the equipment.

Earth fault Failure of insulation of a conductor having a potential above earth


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resulting in a short circuit to earth. Earth Wire Bare conductor used to interlink the OCS masts. Grounding Mesh / Earth Mat A system of bare conductors and/or bare driven conductor rods/pipes

usually installed as a totally interconnected grid and buried in the earth to provide a low impedance and high current capacity connection to the earth.

Headway The time interval between following trains. High speed circuit breaker (HSCB)

A direct current circuit breaker protecting the positive circuit.

High Voltage Electrical Room (HER)

High Voltage Electrical Room receives 34.5kV power and transforms from 34.5kV to 400VAC, 3-Ph at each station on Main Line and in the Depot.

High Voltage As applied for this Contract, the high voltage is over 1000 VAC. ICD File ICD is an encrypted file format used by Safe Disc. ICD files contain

information that prevents the copying and reproduction of discs. ICD files are usually saved along with an EXE file. Safe Disc-encrypted programs or must have the signature verified by the user before they can be decrypted and ran.

Interrupting Capacity It is a current that can shut off a large current generated in a short circuit accident without problems such as welding of contacts and destruction of circuit breakers. It is usually expressed in Amperes (A) and kilo-Amperes (kA).

Low Voltage As applied for this Contract, low voltage refers to voltage not exceeding 1000 VAC.

Metering outfit Complete unit of equipment for measurement purpose of power consumption by the Project supplied from 34.5kV Power grid of MERALCO.

Overhead Contact System (OCS)

The part of the traction electrical system comprising the overhead conductors (or single contact wire), aerial feeders, supports, foundations, balance weights and other equipment and assemblies, that delivers electrical power to electric vehicles.

Parallel Return Wire An along-track aerial bare or insulated cable mounted on the OCS poles (or an insulated cable installed in a trough or duct) which provides electrical power reinforcement to the OCS by means of T-connected feeder jumpers at regular intervals. Also known as "parallel feeder".

PLC (Programmable Logic Controller)

PLC is a programmable controller, which utilizes ladder diagram programming and advanced instructions for use in Automation environment.

Power Receiving Post (PRP) It is not directly able to receive electricity to Depot substation from Meralco grid, so it will be installed Power Receiving Post so that there is no obstacle in receiving electricity.

Return Conductor Means a conductor that carries return current from the tracks back to the substation.

Rail Bond Means an electrical connection across a joint in or between adjacent lengths of running rail.

RTU (Remote Terminal Unit)

Interface unit between control panel and SCADA.

Substation Automation System (SAS)

Substation automation refers to using data from Intelligent electronic devices (IED), control and automation capabilities within the substation, and control commands from remote users to control power-system devices.


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Station Substation (SSS) Station Substation receives 34.5kV power and transforms to 400V AC, 3-Ph at each Station for supplying power to each station.

Sectioning Post (SP) Insert the circuit breaker at both ends of the section and short circuit to prevent the potential difference and protect the pantograph and section. On the other hand, when an accident occurs, open circuit breaker to prevent expansion of accident.

Switchgear Means Isolator Switches, Circuit Breakers, Interrupters, Cut-outs and other apparatus used for the operation, regulation and control of electrical circuits.

System Electric Power System comprised of traction power supply system, HV power supply distribution system and auxiliary power control system.

Traction Substation Traction Substation receives 34.5kV AC and converts 34.5kV AC to 1500V DC for feeding traction power to the trains via OCS.

Withstand Capability Rated capability of equipment and or conductor to withstand without damage by the mechanical forces of a short circuit or the thermal effects of a short circuit downstream from the equipment. Also, a rated capability of equipment which will withstand without damage for specified power frequency over-voltage and/or for surge or impulse voltage.

4.3.2 Abbreviations

Table 6: Abbreviations Used

AC or ac Alternating Current

AFC Automatic Fare Collection

ANSI American National Standards Institute

AWG American Wire Gauge

BCC Back-Up Control Centre

BS British Standards

BSS Bulk Supply Substation

BTT Built in Test Diagnostics

CT Current Transformer

DC or dc Direct Current

DNP Defect Notification Period

E&M Electrical and Mechanical

EMI Electro Magnetic Interference

EMC Electro Magnetic Compatibility

EN European Norm (Standard)

FAT Factory Acceptance Test

g/m2 Grams per metre squared

GNAN Gas Natural Air Natural

GNAF Gas-Insulated Self-Cooled Forced-Air Cooled

GFAF Gas-Insulated Forced-Gas Forced-Air Cooled


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GIS Gas Insulated Switchgear

HER High Voltage Electrical Room

HSCB High Speed Circuit Breaker

IEC International Electrotechnical Commission

LAN Local Area Network

LBS Load Break Switch

LED Light Emitting Diode

LSZH Low Smoke Zero Halogen

LV Low Voltage

Mc Motor Coach

MCCB Moulded Case Circuit Breaker

MOF Metering Out Fit

MRT Mass Rapid Transit

MW Messenger Wire

NC Normally Closed

NDTs Non-Destructive Tests

NO Normally Open

NSRP-S North South Rail Project South Extension

OCC Operation Control Centre

OCS Overhead Contact System

O&M Operation and Maintenance

ONAF Oil Natural Air Forced

ONAN Oil Natural Air Natural

PLC Programmable Logic Controller

PT Potential Transformer

p.u. Per Unit

RAMS Reliability, Availability, Maintainability and Safety

RMS Root Mean Square

RMU Ring Main Unit

RTU Remote Terminal Unit

SAS Substation Automation System

S/S, SS Substation

SCADA Supervisory Control and Data Acquisition

SCR Station Control Room

SE System Earth


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SF6 Sulphur Hexafluoride

SP Sectioning Post

SSS Station Substation

STRASYA Standard urban Railway System for Asia

Tc Trailer Coach

TP Triple Pole

TPS Traction Power System

TRU Transformer Rectifier Unit

TSS Traction Substation

UPS Uninterruptable Power Source

VDU Visual Display Unit

VT Voltage Transformer

VVVF Variable Voltage Variable Frequency

XLPE Cross-Linked Polyethylene

DESIGN CRITERIA AND STANDARDS

4.4.1 Design Criteria

Design criteria and design philosophy of the power supply system of MMSP Project shall meet but not limit to the following criteria:

1. Application of state-of-the-art Technology;

2. Design proven in service;

3. Design life is 30 years;

4. Minimum life cycle cost;

5. Low maintenance cost;

6. Use of interchangeable and modular components;

7. Extensive and prominent labelling of parts, cables and wires;

8. Use of unique serial numbers for traceability of components;

9. High reliability;

10. Low energy loss;

11. System safety;

12. Adequate redundancy in system;

13. Fire and smoke protection;

14. Use of fire-retardant materials;


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15. Environment friendly to avoid contamination by oil leakage in case of incident;

16. Adherence to operational performance requirements; and

17. Maximum utilization of indigenous materials and skills, subject to quality conformity.

4.4.2 Proven Design

1. The Contractor shall develop the design based on this Specification and on proven and reliable engineering practices. The design details shall be submitted with technical data and calculations to the Engineer for his review.

2. The system, including all sub-systems and equipment, shall be of proven design.

3. Sub-systems and equipment proposed by the Contractor shall have been in use and have Railway System in Revenue Service in three different countries out of their origin over a period of at least five years.

4. The system and sub-systems equipment shall be designed to comply with FEMA 1050.

5. Where similar equipment or sub-systems of a different rating are already proven in service, the design shall be based on such equipment.

In case these stipulations are not fulfilled, the Contractor shall furnish sufficient to prove the basic soundness and reliability of the offered subsystem and compliance with the design criteria.

4.4.3 Adequate Margin

Adequate margin shall be built into the design particularly to take care of the higher ambient temperatures, dusty conditions, and high seasonal humidity, etc. prevailing in Manila.

4.4.4 Applicable Standards and Code of Practices

International Electrotechnical Commission (IEC) & European Norm (EN) Standards:

IEC 60034 (Clause 5.6.2) Rotating electrical machines

IEC 60038 IEC standard voltages

IEC 60044-1 (Clause 5.1.6) Instrument transformers – Part 1: Current transformers.

IEC 60044-2 (Clause 5.1.7) Instrument Transformers – Part 1: Inductive voltage Transformers.

IEC 60071 Insulation Coordination.

IEC 60076 Power transformers.

IEC 60076-10 Power transformers – Part 10: Determination of sound level.

IEC 60076-11 Power transformers – Part 11: Dry-type transformers.

IEC 60076-15 Power transformers – Part 15: Gas filled transformers.

IEC 60099 Surge arresters.

IEC 11801 Generic cabling requirements for twisted pair and optical fibre cables.

IEC 60129 Alternating current disconnectors (isolators) and earthing switches.

IEC 60137 Insulated Bushing for rated Voltage above 1kV.

IEC 60146-1-1 Semiconductor converters, general requirements and line commutated converters. Specification of basic requirements.


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IEC 60146-1-2 Semiconductor converters, general requirements and line commutated converters. Application guide.

IEC 60146-1-3 Semiconductor converters, general requirements and line commutated converters. Transformers and reactors.

IEC 60156 Insulating liquids – Determination of break down voltage at power frequency – Test Method.

IEC 60168 Tests on indoor and outdoor post insulators of ceramic material or glass for systems with nominal voltage greater than 1kV.

IEC 60214 On load tap changer.

IEC 60228 Conductor of Insulated Cables.

IEC 60255 Electrical Relays.

IEC 60287 (Clause 5.8.2) Electric cables – Calculation of current rating of cables (100% load factor).

IEC 60265-1 High Voltage switches – Part 1: Switches for rated voltages above 1kV and less than 52kV.

IEC 60296 (Clause 5.2.2) Fluids electro technical applications – Unused mineral insulating oils for transformers and switchgear.

IEC 60332 Tests on electric cable under fire conditions.

IEC 60364-4-41 Low Voltage electrical installations – Part 4-41: Protection for safety – Protection against electric shock.

IEC 60502-1&2 Power cables with extruded insulation and their accessories for rated voltage above 1kV (Um=1.2 kV) up to 30 kV (Um=36 kV). Part 2: rated voltages from 6kV (Um = 7.2kV) up to 30kV (Um = 36kV).

IEC 60529 Degrees of protection provided by enclosures (IP code).

IEC 60622 Sealed nickel-cadmium prismatic rechargeable single cells.

IEC 60664-2-2 Insulation coordination for equipment within Low Voltage Systems.

IEC 60793 Optical fibres – Part 1-20: Measurement methods and test procedures – Fibre geometry.

IEC 60811-1-2 Common Test methods for Insulating and Sheathing Materials.

IEC 60840 Power cables with extruded insulation and their accessories for rated above 30kV (Um = 36kV) up to 100kV. Test methods and requirements.

IEC 60850 Railway applications – Supply voltage of traction systems.

IEC 60859 Cable connections for gas-insulated metal-enclosed switchgear for rated voltages of 72.5kV and above.

IEC 60865 Short-circuit currents – Calculation of effects.

IEC 60865-1&2 Short circuit current calculations.

IEC 60870 Control equipment and systems: Relevant parts for Power supply and environment conditions, interfaces electrical characteristics, Performance requirements, Transmission protocol or other as required.

IEC 60947-1 Low Voltage switchgear and control gear – Part 1: General rules.


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IEC 61000 Electromagnetic compatibility (EMC).

IEC 61936-1 Power installations exceeding 1kV AC Part 1 common rules.

IEC 61992 Railway Applications - Fixed installation DC Switchgear.

IEC 62236-2 Railway applications – Electromagnetic compatibility – Part 2: Emission of the whole Metro system to the outside world.

IEC 62128-1 Railway applications – Fixed installations – Electrical safety, earthing and the return circuit – Part 1: Protective provisions against electric shock.

IEC 62128-2 Railway applications – Fixed installations – Electrical safety, earthing and the return circuit – Part 2: Provisions against the effects of stray currents caused by DC traction systems.

IEC 62271 High voltage switchgear and control gear,

IEC 62271-1 Common specifications for high voltage switchgear and control gear standards.

IEC 62271-102 Alternating current disconnectors and earthing switches.

IEC 62271-203 Gas Insulated Switchgear.

IEC 77 Rules for electric traction equipment.

IEEE 1115 Battery Sizing.

IEEE 404 Cable and joints for use with extruded dielectric cable rated 5000V to 13800V and cable joints for use for use with laminated dielectric cable rated 2500V to 50000V.

IEEE 48 IEEE Standard test procedures and requirements for high voltage alternating current cable terminations.

IEEE 575 Induced voltage in cables sheath.

IEEE 80 Substation Earthing.

IEEE 802-3 Ethernet based LANs.

IEEE 519 (Clause 5.3.5, 5.4.5) IEEE recommended practices and Requirements for Harmonic Control

in Electrical Power Systems.

BS 88 Specification for cartridge fuses for voltages up to and including 1000V AC and 1500V DC.

BS 951 Specification for clamps for earthing and bonding purposes.

BS 6651 (Clause 5.7.4) Code of practice for protection of structures against lightning.

EN 50081-1 Electromagnetic compatibility – Generic emission standard part 1: Residential, commercial and light industry.

EN 50119 Railway Applications – Fixed installations. Electric traction overhead contact lines.

EN 50121 Railway Applications – Electromagnetic Compatibility.

EN 50122 Railway applications Fixed installations. Electrical safety, Earthing and bonding.

EN 50122-1 Protective provisions relating to electrical safety and earthing.


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EN 50122-2 Protective provisions against the effects of stray currents caused by D.C.

EN 50123 Railway applications – Fixed installations – D.C. switchgear.

EN 50123-1 Railway application – Fixed installations D.C. equipment – Part 1: General.

EN 50123-2 Railway applications – Fixed installations D.C. switch off equipment – Part 2: Direct Current circuit breakers.

EN 50123-4 Railway applications – Fixed installations Direct Current equipment – Part 4: Breaker switches for the outside, breakers and earthing breakers.

EN 50123-7-2 Railway applications – Fixed installations Direct Current equipment – Part 7: Measurement, control and protection equipment for specific installation in the direct current traction system.

EN 50124 Railway applications – Insulation coordination.

EN 50124-1 Railway applications – Coordination of the insulation Part 1: Fundamental recommendations – Insulation distances in the air and creepage distance for any electrical and electronic equipment.

EN 50125-2 Railway applications – Environmental conditions for equipment – Part 2: Fixed electrical installations.

EN 50126 The specification and demonstration of Reliability, Availability, Maintainability and Safety (RAMS).

EN 50149 Railway applications – Electric traction fixed installations – Copper and copper alloy grooved wires.

EN 50151 Railway applications – Fixed installations – Electric traction – Special instructions for composite material insulators.

EN 50163 Railway applications supply voltages of traction systems.

Japanese Electrotechnical Committee (JEC) & Japanese Industrial Standards (JIS):

JEC 0202-1994 General requirements for impulse voltage and current inspection.

JEC 0221-2007 Requirements for measuring instruments of impulse voltage and current inspection.

JEC 0222-2009 Standard voltage.

JEC 1201-2007 Instrument transformer (for protection).

JEC 2200-2014 Power transformers.

JEC 2220-2014 On-load taps changers.

JEC 2300-2010 Circuit breakers.

JEC 2310-2003 Disconnecting switch.

JEC 2330-1986 Power fuses.

JEC 2350-2005 Gas insulating switchgears.

JEC 2374-2015 Lightning arresters (3.3-154kV).


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JEC 2410-2010 Semiconductor power converters.

JEC 2500-2011 Protective relays for electric power.

JEC 2510-1989 Over current relays.

JEC 2511-1995 Voltage relays.

JEC 2512-2002 Ground directional relays.

JEC 2515-2005 Ratio differential relays.

JEC 3408-2015 High voltage tests on Cross-linked polyethylene insulated cables (11kV-275kV) and their accessories.

JEC 3411-2008 20 kV class (22 kV, 33 kV) tests on Cross-linked polyethylene insulated cables and their accessories.

JEC 5202-2007 Bushings.

JIS C 3005-2014 Test methods for rubber or plastic insulated wires and cables.

JIS C 3401-2002 Control cables.

JIS C-3605-2002 600 V Polyethylene insulated cables.

JIS C 0920-2003 Degrees of protection provided enclosures (IP Code).

JEM 1265-2006 Low voltage metal enclosed type switchgears and a control gear.

JEM 1425-2011 Metal enclosed type switchgears and a control gear.

Other Applicable Codes

IEEE 1115 Battery Sizing.

IEEE 404 Cable and joints for use with extruded dielectric cable rated 5000V to 13800V and cable joints for use for use with laminated dielectric cable rated 2500V to 50000V.

IEEE 48 IEEE Standard test procedures and requirements for high voltage alternating current cable terminations.

IEEE 575 Induced voltage in cables sheath.

IEEE 80 Substation Earthing.

IEEE 802-3 Ethernet based LANs.

IEEE 519 (Clause 5.3.5, 5.4.5) IEEE recommended practices and Requirements for Harmonic Control in Electrical Power Systems.

Philippine Code of Practices

Philippine Distribution Code 2017 Edition

The Philippine Grid Code 2016 Edition

SYSTEM REQUIREMENTS

4.5.1 General

The MMSP shall have 15 stations and one Depot running from Quirino Highway – Bicutan and spurred at Lawton East to Terminal T3 allowance for the future extension.


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The Traction Power Supply (TPS) shall be designed to fully meet the requirements of EN 50163 for a traction supply at nominal 1500V DC. The TPS shall be capable of meeting the entire demand of peak time service permanently with one adjacent TSS out of service and as the reduced voltage may result in reduced train performance. The TPS voltage shall not fall to less than 1000V DC, under the worst operational mode and supply system outage.

The 34.5kV system is designed to ensure that voltage regulation under normal feeding and abnormal feeding is maintained within the tolerances as specified in Philippine Distribution Code 2017 Edition.

All the 34.5kV switchgear located at TSS and 34.5kV Ring-Main Unit (RMU) systems at SSSs are designed and supplied to support the ultimate capacity operation of the MMSP system (10-car: 5Mc & 5Tc train, 2 minutes headway).

The Contractor shall be responsible for:

a) a complete design and installation of TSSs. Each TSS shall be equipped including but not limiting to 34.5kV Switchgear, two 4.2MVA transformer Rectifier Units, 1500V DC switchgear, Energy Storage System (ESS), Negative busbar, busbar, battery and chargers, protection relays and all AC and DC cablings etc.

b) a complete design and installation of SSS. Each SSS shall be equipped including but not limiting to 34.5kV Ring Main Unit (RMUs), distribution transformer, protections, cabling, battery and chargers and diesel generator set etc. Note: Diesel Gen set to be installed at a ground level.

c) a complete design and installation of power distribution in the Depot. The distribution power supply system shall be equipped including but not limiting to 34.5kV Ring Main Unit (RMUs), distribution transformer, protections, cabling, battery and chargers and diesel generator set etc.

The 34.5 kV Power delivered to MMSP shall be receiving from Bulk Supply Substation(s) directly supplied from MERALCO 115kV substation, as follow:

a) All the TSSs, SSSs on the main line and in Depot are received the power from Bulk Supply Substation(s) and in turn the power shall be distributed in looping manner from substation to substation. Refer to Feeding Line Diagram Drawings shown in Fig. 1, Fig.2, Fig.3 & Fig. 4 for information.

The Contractor shall coordinate with other contractor(s) for the layouts and any of other requirements for the accommodations and facilities of the receiving equipment in TSSs, SSSs etc.

b) The Contractor shall coordinate with MERALCO for the requirement details of the metering devices at the design stage. The energy meter (MOF) will be provided by the MERALCO. The Contractor shall provide the space for these devices for housing the VT and CT. The Contractor shall also coordinate with MERALCO on the necessary spaces, locations and other miscellaneous requirements.

c) The Contractor shall coordinate with MERALCO and other Interfacing Parties on the interface between the TSS and MERALCO’s substation, if the BSS is designed and built by MERALCO.

d) The Contractor shall coordinate with Interfacing Contractors and other Interfacing Parties with regard to the equipment weight imposed on the foundations by the substation power supply system equipment. The Contractor shall assure that the actual loading of permanent installation and delivery does not exceed the agreed loadings.

e) The Contractor shall provide his own electric power if required, for his own use at all sites.

Cables installation within the BSSs, TSSs, SSSs and SP.


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The Contractor shall provide all cables needed but not limited to the following: 115kV, 34.5kV AC, 1500 VDC and Low voltage using in the BSSs, TSSs, SSSs and SP, except BSSs shall include 400V and LV Voltage.

a) Interfacing with Civil Contractors for the provision of all electrical equipment rooms, including the required structure openings, equipped with building services, for the BSSs, TSSs, SSSs and SP.

b) The Contractor shall coordinate and interface with Civil Contractors and any other Interfacing Parties regarding the delivery, installation and structure openings of the traction substation equipment. The LV power to traction substation including, but not limited to, lighting and battery chargers shall be provided by operations transformer in the traction substations. The LV electric power to the operations transformer of SP shall be supplied from both Lawton East and Lawton West stations.

4.5.2 Earthing, Bonding and Lightning Protection

The earth mats for the BSSs, TSSs, SSSs and SP and other structures shall be designed and provided by the Contractor. The Contractor shall be responsible for connection of the principal terminals of each earth mat to an earth busbar located inside substations and for the provision of the earth busbar itself.

Earthing and bonding at BSSs shall be done according to the requirements of MERALCO, if any.

All earthing and bonding at BSSs, TSSs and SP shall be done according to the MMSP Earthing and Bonding Strategy in strict compliance with EN 50122 or equivalent standards.

Each earth mat shall be terminated to the substation earthing busbar through two terminals/conductors at either end of the earthing busbar. The two terminals/conductors shall be connected onto the earthing busbar through disconnecting links, for ease of maintenance.

The integrity of Earthing and Bonding installations shall be verified, and the design validated by an approved competent ‘Third Party’ approved by the Engineer. Competent Third Party shall measure earth grid resistance from ‘Clean earth’ and ‘General earth’ Busbars inside the BSS, TSS and SP.

The Contractor shall provide the earthing connection from earth mats to all outdoor facilities of substations directly.

The Contractor should consult with Civil Contractors and related departments on earthing work and its testing methods.

The Contractor shall coordinate its requirements for earthing (including earth mats), bonding and lightning protection with Interfacing Contractors.

The Contractor shall perform a Grounding Quality Control Tests as follows:

a) Test ground resistance of each ground grid after installation and before utility cable connection.

b) Test each ground bus when connected to ground grid using an approved test procedure. Test results shall be submitted for review by the Engineer.

c) Test resistance of connections and conductors between ground buses in TSSs, SSSs for electrical continuity.

d) Prepare and submit testing certifications for each TSS site, testing shall be signed by the testing technician, and certified by the Contractor Quality Control Representative for review by the Engineer.

The Contractor shall perform Earthing and Bonding measures to ensure three essential aspects:

a) Provide for the electrical safety of rail system personal, passengers and other public;


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b) Protect the integrity of rail operations and of maintenance requirements from electrical hazards; and

c) Protection equipment, cabling, buildings and structures from electrical hazard.

4.5.3 Grounding (Earthing) System

Grounding system shall be designed and manufactured in accordance with the Philippine Electrical Code (2017 Edition), BS7671 Wiring Regulations and applicable standards.

a) P.O Section

The main grounding system for TSSs, SSSs, HERs, ERs, OCC building, Workshop, Light Repair Shop and DBS shall be designed and provided by the Contractor. Installation and pre-commissioning tests shall be undertaken by Civil Contractor CP101.

Contractor shall manage and liaise with Civil Contractor CP101for the proof of installations and attend pre-commissioning witness tests.

b) Remain Sections

The main grounding system for TSSs, SSSs, HERs and ER shall be designed shall be designed and provided by the Contractor. Installation and pre-commissioning tests shall be undertaken by relevant Civil Contractor(s). Final Commissioning shall be carried out by Contractor.

4.5.4 Tunnel Lighting and Outlets

Lighting and Outlets shall be designed and manufactured in accordance with the Philippine Electrical Code (2017 Edition) and applicable standards.

a) In case of single-track tunnel, tunnel lighting shall be installed at 20m intervals on one side and on the same side in both tunnels.

b) In case of double-track tunnel lighting shall be installed on both sides at 20m intervals.

c) The light fittings shall be installed at 2.2m above the aisle surface, securing 1 lux or more illuminance from the aisle surface.

d) The power supply of the lighting shall be supplied from both LV distribution boards located in the stations from both end of section. However, between Quirino Highway and the Depot the supply shall be from Quirino Highway.

e) The lighting fixtures shall be of LED type.

f) The type of tunnel Outlets shall be a waterproof. Dustproof hook type and with a lid so the plug socket can be hidden when not in use.

g) Outlets shall be installed together with terminal blocks in a metal boxes for cable wiring. Metallic Boxes shall be hot dip galvanised for rust prevention.

h) The Outlets shall be rated at 230V, 20A and installed at every 100m intervals and located at least 300mm above walking path.

i) The tunnel lighting and outlets shall be installed by relevant Civil Contractors. Contractor shall manage, liaise and interface with relevant Civil Contractor(s) for the design installation details. Test and Commissioning shall be carried out by Contractor.

4.5.5 Electro-Magnetic Compatibility (EMC) and Electro-Magnetic Interference (EMI)

The Power Supply System must achieve electromagnetic compatibility (EMC) between:

a) The railway line equipment and facilities

b) Equipment and facilities of line neighbours


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c) Workers and neighbours of the line.

The Contractor shall guarantee that the traction power supply equipment has the capability of preventing an electromagnetic interference (EMI) from any equipment supplied by the Interfacing parties and the interfacing contractor.

The Contractor shall submit an EMC Control Plan to Engineer for review as required in General Specifications.

The Plan shall include the measures to reduce conducted, induced and radiated emissions to acceptable levels as specified by IEC 62236: Railway Applications-Electro-magnetic Compatibility.

The Plan shall specify the measures to increase the immunity of the traction power supply equipment for the main track.

The Plan shall specify the basic protective measures proposed for all electrical and electronic subsystems and components, and the specific protective measures to be adopted for selected subsystems and components.

The Plan shall analyse EMI/EMC impacts on the design of the traction power supply equipment, the train, and wayside equipment as well as the general environment. Particular attention should also be paid to additional requirements in grounding, bonding, shielding, filtering and cable arrangements.

The Contractor shall conduct full EMI tests on each one set of equipment and for each type as well as full EMC tests on complete traction power supply equipment in accordance with IEC 62236.

Non-safety related systems interface. The Contractor shall take appropriate measures to ensure that EMC is achieved between the traction power supply equipment and track-side equipment.

4.5.6 Environmental EMC

The electrical equipment of traction power supply system shall not produce interference with radio, television, tape IC recorder/players, heart pacemakers, radar, computer systems, magnetic media, portable and cellular telephones, etc. This includes action by static electricity, magnetic field and electric field.

4.5.7 System Studies Requirements

The Contractor shall carry out the complete Power Supply System studies including the analysis and shall be submitted to the Engineer for review. This shall include but shall not be limited to:

1. DC traction power simulation studies;

2. Regenerating power absorbing device study, specification and effect;

3. Traction and Non-Traction Power Feeding System of MMSP in this project for DC traction power study, Station loads study as shown on the Major Feeding Line Diagrams.

4. Harmonics mitigation studies;

5. Short circuit current, voltage dip study and flicker study;

6. Load Flow and Analysis studies;

7. Equipment Sizing studies;

8. Cable conductor sizing studies;

9. AC and DC Harmonics study;


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10. AC and DC Protection relay settings and system protection coordination study;

11. Cable study, main circuit, LV and control cables voltage drop, capacity etc.;

12. Power supply design study and analysis for the whole system;

13. AC earthing, lightning and surge protection studies;

14. Earthing and Bonding studies;

15. EMC/EMI studies associated particular with Traction Power Supply system and Station supplies.

16. Touch Potential Studies; and

17. Return Stray current corrosion control study and coordination with the interfacing party with the Civil Contractors.

4.5.8 Traction Power Supply Studies

The following TPS studies to be carried out by the Contractor but not limit to the following:

1. Overall Power supply design study, including the whole system, each station, Depot, OCC, etc. including the determination of the sufficiency of the minimum specified ratings.

2. DC traction power study using simulations as per track layout plan, operational scenarios. Operational data and Rolling Stock (Train) data to be provided by the relevant Engineers. Train data will be provided by the Rolling Stock Contractor.

3. Short circuit current, short circuit current curves, voltage dropping study and flicker study.

4. Normal peak hour RMS current and maximum current in various feeders.

5. Short time peak hour RMS current and corresponding maximum currents in various feeders.

6. Protection relay, calculations, setting and system protection coordination study.

7. Track voltage rise in Main Line and Depot under normal and fault conditions. The tracks shall be insulated on Main Line while earthed in Depot.

8. Sizing the Main Transformer to be installed at Bulk Supply Substation.

9. Calculation and verification of traction transformer size, rectifier, DC switchgear, DC cables, Negative busbar return, battery chargers and ESS (Energy storage system) capacities.

The equipment shall meet the operational requirement in normal, degraded mode of operation and under fault conditions. The Contractor shall carry out adequate studies on the parameters specified in the bid document, seek clarifications, and make site visits, site investigations and carry out simulation studies for ascertaining the adequacy of the specified parameters as required.

As a minimum, the following studies or demonstrations will be required, in addition to any specific studies required to meet RAMS including Hazard Management requirements and any studies mandated by the relevant Metro systems standards, or to meet the requirements of the Power Utility Provider (MERALCO).

4.5.9 Earthing Bonding Lightning and Stray Current Studies

1. The Earthing and lightning protection management study and report;


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2. The Stray current corrosion control study shall include an assessment of the track resistance, conductance, regular data logging of track voltage at Sub-Stations, IRJs, at end sidings other identified locations and its measurement in Main Line and Depot. The normal/reference parameters and values for different operational plans shall be ascertained; and

3. Determination of Stray/leakage current flow across double IRJ near Depot when bridged.

4.5.10 SCADA Studies

A study of the adequacy of the SCADA system hardware and software for guaranteed performance under the most onerous conditions shall be undertaken.

DESIGN AND CALCULATION REQUIREMENTS

4.6.1 General

Based on the traction power system requirements, the short circuit levels, load flow studies on the system and fault analysis, the power supply system shall be designed and sizes and ratings of all equipment, cables of different voltages (115kV, 34.5kV, 1500V DC & 400V AC), earth bus and conductors, stray current collecting conductors, joints, jumpers, as well as ancillary equipment and instrument transformers shall be firmed up and the design finalized. Full details of all calculations and shall be submitted to the Engineer for review.

The Contractor shall carry out a simulation study to evolve an economic design that ensures the traction power demand, voltage requirements and RAMS requirements for full peak time services are satisfactorily met, both under normal feed conditions and with one adjacent TSS out of service.

This study shall also finalize the size of 34.5kV AC cables, size and number of 1500V DC cables (positive and negative), cross section of overhead conductor wire/rigid rail and rating of other associated equipment. The failure of one BSS shall not affect the normal operation.

4.6.2 115kV/34.5kV Grid Main Power Transformer Capacities

The capacities of Grid Main Power Transformers installed at Bulk Supply Substations were assessed by simplified manual calculations and it was estimated that shall be rated 60 MVA with ONAN and 80/100 MVA with ONAF1/ONAF2.

Each BSS shall install with two 600MVA, 115kV/34.5kV.

The Contractor shall undertake detailed studies and specify the necessary included train simulations for various scenarios such as Normal Operation, Outages Conditions and Degrade Modes to rate and confirm the capacities of Main Transformers are of adequate size to support the ultimate capacity operation of the MMSP system (10-car train, 2 minutes headway) and station loads required that are being specified by Civil Contractors.

4.6.3 Traction Simulation Calculations

The Contractor shall perform a Simulation Studies to determine the transformers capacity and associated Rectifiers and ESS required at the TSSs. The results of simulation studies shall be submitted to Engineer for review and approval. Such Simulation Studies shall be done by the Contractor using validated software and proven use on the similar railway project, subject to certify by relevant Railway Authorities and approval by the experience Engineers.

The Traction power supply system shall operate at a nominal 1500V DC. However, the average line voltage to be used for performance calculations for various scenarios shall be in accordance with the Rolling Stocks design specification.


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4.6.4 Simulation Study Input Requirements

The capacity of traction transformers and ESS (Energy Storage System) required to be installed at the TSS, would have to be arrived at by performing a Simulation Study wherein the inputs shall include the following:

1. Train operation plan under Normal operating conditions, degraded and as defined for special events operating conditions;

2. Power supply arrangement, consumption under normal, degraded mode;

3. Speed vs Tractive effort, Speed vs Current and speed vs distance characteristics of the locomotives/train sets;

4. Harmonic distribution of current drawn by locomotive/train sets;

5. Other mechanical characteristics of locomotives/train sets, including weight, power requirement of auxiliaries, Air resistance to train etc.;

6. Longitudinal alignment of the track, including curve details;

7. Vertical profile of the track, including details of gradients;

8. Inter-station spacing, stopping stations, stoppage time;

9. Maximum speed and Scheduled speed of trains;

10. Permanent speed restrictions, if any, along the line;

11. Characteristics of contact wire to determine the Impedance; and

12. Ambient temperature.

4.6.5 Simulation Study Output Requirements

The Simulation Study shall determine the following in normal and degraded mode, among other data as specified under section 4.

1. Impedance of OCS;

2. Voltage at Pantograph along the line during various modes of operations;

3. Instantaneous maximum demand at TSS;

4. Integrated maximum demand (15 minutes);

5. Peak and off-peak maximum load demand;

6. Maximum temperature rise points of contact wire;

7. Cable sizing for feeder and return;

8. Paralleling points for track and the OCS;

9. Voltage rise at the return circuit track or negative earth bus under normal and fault conditions;


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10. Voltage drop locations and mitigation measures such as location and sizing of sectioning and track cabins; and

11. Energy Regeneration using braking.

4.6.6 Distribution (Non-Traction) Load Study Requirements

The Distribution (Non-Traction) Load Studies shall be carried out to meet the requirements as specified in this specification.

4.6.7 Validation of the Design Calculations

For Validation of the design of the complete system, the Contractor shall arrange independent auditing of the design of works in accordance with the relevant National or International Standards from a reputed Independent Agency (Auditor), who have already undertaken similar jobs in the past for other Metro systems.

The Contractor or its any of the partners or the designer shall not be part of this independent agency. The approval of this independent agency shall be done by the Engineer from at least three proposals submitted by Contractor.

4.6.8 Design and Construction of 115kV/34.5kV Bulk Supply Substations

The scope of work includes the construction of two complete Bulk Supply Substations (BSSs), one in the Depot (to be known as Depot BSS) and one at the south end of the line in the region of Lawton West location (to be known as the Lawton West BSS). This includes all civil, structural, landscaping, etc. work and all electrical works necessary to obtain BSS's that fully meet all the operational requirements of the Metro and are fully integrated into the MERALCO National Grid in accordance with the interfacing and integration requirements of the local Power Utility Provider.

The scope of work also includes the installation of the 115kV, 34.5kV, 2 x 60MVA Grid Main Power Transformers, complete with Automation Substation Protection and Control system in compliant with IEC 61850. This includes fibre optic cables to the MERALCO Grid Substation (GSS) and all site work trenching works, installation of cables, cable jointing (and cable jointing pits) and all protection necessary for the cables.

Contractor is advised to consult with MERALCO for the existing type of MERALCO’s 115kV/34.5kV GIS substation were built in Manila and is currently implementing on 115kV system and they are:

1. Conventional GIS Type Substation which required approximate area of 5400sqm; and

2. Compact GIS Type Substation which required approximate area of 2000sqm which is preferable.

4.6.9 Design and Testing Approvals

The Contractor shall take full cognisance of the requirements of the MERALCO Energy Regulatory Commission Electricity Distribution Code, in respect to the requirements for approval of the design of the BSS and inspection and testing of the completed installations (including the cable installation and connections to the GSS's) by the Licensed Distribution Authorities.

The Contractor shall optimize the design in accordance with the applicable building regulations and rules for good building construction, to suit the tendered equipment and submit a fully detailed design of for the civil, structural, architectural and electrical works for the approval of the Engineer prior to starting any construction work.

The building shall be structurally, functionally adequate and aesthetically pleasing in all respects and special attention shall be given to an optimized design of the BSS building; including the GIS room, so that the GIS equipment are correctly laid out inside the room and at the same time there is adequate space for movement of people and equipment inside the room without any inconvenience.


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It shall be noted that the GIS Equipment, including its control systems, is required to function under extreme tropical climate conditions and under a high degree of pollution level in vicinity of Substation; therefore the design shall include all necessary arrangements for maintaining a controlled environment within the GIS Room (such as air conditioning / pressurized ventilation / dehumidifiers etc.).

Contract shall take full measurements including the height of the Control room and Auxiliary Main Substation room and that of the GIS room.

The Contractor shall be required to design and execute all civil works at the BSS locations including those required to accommodate the incoming and outgoing cables.

The Reinforced Cement Concrete (RCC) construction shall be based on framed structures in accordance with the National Building codes and be Earthquake resistant as per zone of Manila.

Boundary walls, entrance gates, baffle walls between transformers, transformer foundations and support anchor blocks, oil retention tanks for transformers, burnt oil pits, etc. shall also be constructed to be earthquake proof, with protection against earth settlement or displacement.

Materials used for the construction of the building shall be new and of good quality materials shall be so chosen that the buildings when erected shall have good heat and sound insulation properties in normal conditions, as well as when combined with the heating or air-conditioning equipment installed by the Contractor.

The cable space for the GIS cables shall not be below ground level to avoid ingress of water and the work shall also include land drainage in the yards and cellars for rain, waste & seepage water using natural gradients / pumps and sumps, etc.

Provisions shall include complete building E & M services, yard lighting, circulating area lighting, landscaping and other requirements, lightning protection masts, earth meshes and all earthing arrangements.

The provision of Gravel for the yards and all auxiliary services like water supply, lighting, ventilation, air-conditioning, fire detection and alarm etc. and any other work required to successfully complete the work.

Design and construction of the building shall be complete in all respects including cable paths and cable trenches in the switchyard, as well as inside the building.

The Contractor shall design and execute the normal lighting and LV power supplies for the BSSs. The lighting and power auxiliary outgoings located in AC auxiliary cubicles, forming the exit point for all the normal lighting supplies and power connections, shall be supplied from both LT auxiliary transformers. The lighting and power supplies shall be distributed for lighting of complete building as per lux requirements laid by Manila National Building Code and BS 7769. Lighting fixtures to be installed for Indoor/Outdoor lighting shall be of LED type.

All cable trays, cable ladder systems shall be in accordance with EN 61537 and all rigid conduits shall be in accordance with EN 61386.

All the cables shall be installed on the cable trays inside room hung from the ceiling and the width of cable ways shall enable addition of at least 15% of the number of the cables initially foreseen. All cable trays and supports shall be suitably connected to Earthing system at two distinct and separate points. Wherever cutting / welding process required at site, Contractor shall ensure that cold galvanizing zinc paint should be applied after doing the process.

4.6.10 Bulk Supply Substation (BSS) Requirements

Electrical Power to operate Metro Manila Subway Project will be supplied from the local Transmission and Distribution Operator called Manila Electricity and Railway Company (MERALCO) via two separate 115kV overhead lines that are supplied from two different sources or substations of the MERALCO 115kV Grid


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network. The two 115kV overhead lines feed directly into the MERALCO switching compounds at the BSSs.

These switching compounds will then feed the two 115/34.5kV, 60MVA Grid Main Power transformer banks through 115kV transformer HV circuit breakers that are located inside the MERALCO switching compound. The HV circuit breakers will supply power to the two Grid Main Power transformer banks via overhead conductors (this is standard practice and may change to cables based on other considerations by MERALCO). The Grid Main Power transformers will step down from 115kV to 34.5kV which is then fed to the BSS 34.5kV GIS bus bars via 34.5kV XLPE cables and 34.5kV Low Voltage Grid transformer GIS circuit breakers and associated equipment such as Disconnectors. The 34.5kV will then be fed to the traction and non-traction power ring network via 34.5kV GIS circuit breakers, XLPE cables and associated equipment.

4.6.11 Bulk Supply Substation System Configuration and Operation

The reason why the MMSP railway line requires the BSSs to be fed through two independent 115kV sources is to increase resilience, reliability and redundancy and it is based on the requirement and principle that no single failure should cause degradation to the operation of the railway at any given time. The two 115kV feeders will feed different 115kV bus bars inside the MERALCO switching compound, the two bus bars being coupled together by a Bus Coupler circuit breaker. Each 115kV overhead feeder should be able to feed its own Grid transformer bank independent of the other feeder as a result of this system configuration. However, in the event of failure of either feeder, the Bus Coupler can be closed either automatically or manually to ensure that the remaining 115kV feeder can feed the two Grid transformer banks in parallel configuration. It is also very possible to parallel the two 115kV feeders through the closed Bus Coupler circuit breaker. The Client will have to decide the preferred mode of operation.

The same switchgear configuration also exists on the 34.5kV GIS where two separate 34.5kV busbars are fed from different Grid transformer banks through Grid transformer LV circuit breakers, the two circuit breakers being coupled by the 34.5kV Bus Coupler circuit breaker. Similarly, the two 34.5kV GIS busbars can operate independently to supply traction and non-traction power separately, with the Bus Coupler open. The advantage of this configuration of splitting the 34.5kV busbars is that it limits the fault level power on the two independent GIS 34.5kV busbars to 60MVA and it separates the two systems thereby reducing probability of introduction of non-traction power faults onto the traction power network.

4.6.12 MERALCO Scope of Work

The MERALCO scope of work shall include but not limited to the following equipment:

1. Incoming 115kV overhead lines and associated switchgear;

2. 115kV Switching Compound physical structures including building;

3. 115kV bus bars;

4. 115kV Grid transformer HV circuit breakers;

5. 115kV Bus Coupler;

6. All 115kV Disconnectors;

7. Earth Switches inside the switching compound;

8. Auxiliary transformers for switching compound LV power requirements;

9. LV distribution boards;


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10. Relay panels for protection and control;

11. Battery chargers;

12. Metering equipment;

13. Current Transformers;

14. Voltage Transformers; and

15. All other equipment associated with switching compound.

4.6.13 CP106 Scope of Work

The scope of work for CP106 shall include but not limited to the following equipment:

1. Incoming 115kV overhead conductors or underground cables;

2. Capacitor Voltage Transformers;

3. Current Transformers;

4. Voltage Transformers;

5. Disconnectors;

6. Earth switches;

7. 115/34.5kV, 60MVA Grid Transformers;

8. 34.5kV GIS;

9. Auxiliary Transformers;

10. LV distribution boards;

11. Reactive Power Compensation Equipment (if necessary);

12. 34.5kV underground cables;

13. Protection and control equipment including relay panels;

14. Telecommunication equipment;

15. Metering equipment; and

16. Batteries and battery chargers.

4.6.14 Types of Bulk Supply Substations and their Constraints

a) There are two types of 115kV Bulk Supply Substations available for drawing power from the MERALCO 115kV Power Grid to feed the MMSP railway line namely: Compact Indoor GIS and Conventional Outdoor Compound BSSs.

b) The required land for Compact substation is 40m*40m which is generally taken as 2000 square meters while that of Conventional substation is 54m*100m which equates to 5400


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square meters.

4.6.15 Demarcations & Interface between MERALCO and CP106

It is the obligation of the Contractor to manage all interfaces, both internally and externally, including that with MERALCO. Demarcations with MERALCO are dependent on whether Compact or Conventional BSS is adopted.

4.6.16 115/34.5kV Grid Main Power Transformers

Voltage Ratio: 115/34.5kV (step down double winding transformer)

Power Rating: 60/80/100MVA

Cooling: ONAN/ONAF1/ONAF2

Tap Changing: On load tap changing on the HV tap winding

Environmental Consideration: Oil Bund if indoor and oil pit if outdoor with level controlled automatic sump pump.

Transformer Fluid: Mineral oil

Relevant designs standards: JEC 2410-1998 or EN 60076

4.6.17 Site Responsibility Schedule

MERALCO and CP106 shall collaborate to create an Operations and Maintenance interface document called Site Responsibility Schedule. This document shall be needed for the operation, control and maintenance of BSS equipment including MERALCO switching station over the lifespan of the equipment and it shall capture all pieces of equipment at the BSS including all equipment included in the MERALCO and CP106 scopes of work. For each piece of equipment, it allocates and defines responsibility for ownership, control and maintenance. The MERALCO and MMSP Electrical Control Operators at the two respective OCCS, together with the Senior Authorised Persons on site, will be required to use this Site Responsibility Schedule for all switching operations across control boundaries.

4.6.18 MERALCO and CP106 Earth Grid Systems

The two earth grid systems for MERALCO and CP106 shall be kept separate through one end gaped cable armor on the 115kV incoming cable for Conventional BSS and on the outgoing traction and non-traction 34.5kV feeder cables from Compact BSS. The cable armor will be required to be connected to earth at the MERALCO end and gaped at the CP106 end. This measure is necessary in order to insulate the two earth grids from each other especially during earth fault conditions at either end to avoid importation of earth rise potential between the two systems through cable armor of the interconnecting cables.

4.6.19 Small Power or Low Voltage Power Requirements at BSSs

Contractor shall install two auxiliary 34.5kV/400V transformers at each BSS. The auxiliary transformers shall be used to supply LV power that is required for applications such as: air forced cooling of transformer oil, charging batteries, lighting, sockets etc. For resilience and redundancy purposes, the auxiliary transformers shall be located on different 34.5kV bus bars of the GIS with ability to be fed from separate Grid transformer banks.

4.6.20 Metering Requirements

MERALCO shall supply all the metering equipment including CT, VTs, and Wattmeters. The metering equipment shall be located at the MERALCO end, inside the switching compound in the case of Conventional BSS but in the case of Compact BSS, the metering equipment shall be located inside the GIS.


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4.6.21 115/34.5kV Main Transformer Protection

1. Main Protection

a) Differential;

b) LV Balanced Earth Fault or Restricted Earth Fault;

c) Buchholz Pressure Trip;

d) HV Instantaneous Overcurrent; and

e) LV Instantaneous Overcurrent.

2. Back-up Protection

f) HV IDMT Overcurrent;

g) LV IDMT Overcurrent;

h) Winding Temperature Trip;

i) Oil Temperature Trip;

j) Earth Fault;

k) Pressure Trip (Pressure Relief Switch);

l) Tank Earth Fault;

m) Oil Level Trip; and

n) SF6 Trip.

4.6.22 34.5kV GIS Bus Bar Protection

1. Differential

4.6.23 34.5kV GIS Outgoing Feeder Protection

Main Protection

c) Differential

Back-up Protection

a) Directional Overcurrent (Instantaneous);

b) Directional Overcurrent (IDMT); and

c) Earth Fault.

Pilot Wire Protection/Supervision

a) Open circuit;

b) Short circuit; and


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c) Supply fail.

4.6.24 Transformer Alarms

j) Oil Level;

k) Buchholz Gas;

l) Winding Temperature;

m) Oil Temperature;

n) Cooler Fan Failure; and

o) SF6 Gas.

4.6.25 Battery Charger Alarms

a) Charger Fail;

b) DC Fail; and

c) Impedance Fault or Battery Earth Fault.

POWER SUPPLY SYSTEM DESIGN REQUIREMENTS

4.7.1 General

Contractor shall undertake all the necessary for the design of Power Supply System as specified herewith but shall not be limited to the following:

1. Power supply to MMSP shall be drawn from Bulk Supply Substation 34.5kV distribution feeder, and then distributed to the DC traction substation, Station Substations located at the Stations on the main line and Depot.

2. DC traction equipment shall supply at nominal voltage of 1500V DC to the OCS system.

3. The Contractor shall develop its own strategy for earthing, bonding, lightning protection and corrosion control in accordance with applicable Standards JIS, JEC, JEM, or equivalent EN and IEC standards.

4. All E&M systems equipment shall be bonded to the system earth busbar in accordance with applicable Standards JIS, JEC, JEM, or equivalent EN and IEC standards.

5. All indoor and outdoor power supply equipment shall meet IP requirements as specified in JIS C0920-2003 or equivalent EN and IEC standards at the appropriate location and conditions.

6. Control system of the major facilities/equipment for railway operation should employ PLC logic for controlling the operating switches, indicators and protective relays for each circuit.

7. The control power for the SSS and TSS is supplied from the 34.5 kV / 0.23‐0.110 kV and 1.18 kV / 0.23‐0.110 kV Operation transformers respectively.

8. All main protective relays shall be of fully numerical type and shall comply as per IEC 61850 standard. Further, the test levels of EMI as indicated in IEC 61850 shall be applicable to these.

9. All the relays shall be directly connected to inter bay bus using Electrical/fibre optic cables and shall


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support peer to peer communication. The relays shall generate GOOSE messages as per IEC 61850 standards for interlocking and also to ensure interoperability with third party relays. Each relay should also generate an ICD file in XML format for Engineering / integration to a vendor independent SCADA system. All the relays shall have suitable rear and front ports for connectivity to SAS and PC/LAPTOP.

For numerical relays, the scope shall include the following:

1. Necessary software and hardware to up/download the data to/from the relay from/to the personal computer installed in the Sub-Station.

2. The relay shall have suitable communication facility for connectivity to SCADA. The relay shall be capable of supporting IEC 61850 communication standard.

3. The relays shall have fault record, event record, and disturbance record for fault diagnostic and shall have communication ports for local communication for relay settings, modifications, extraction and analysis of fault/event/ disturbance records from a laptop and for communication with Substation automation system.

4. The relay shall have four independent parameter setting groups.

5. The relay shall have provision of back up protection facility.

6. The power distribution system shall be designed to ensure continuity of supply and the specified system performance under single outage conditions and shall be provided with a protection system to ensure that in the event of a fault element is isolated; no other equipment is disconnected by the operation of such a protection device.

7. The power system design shall ensure that cables and equipment shall be separated and protected to ensure that a single failure of an element of the power supply system shall not result in the total loss of power distribution to any part of the Line, not affect the operation and not result in failure of any other power supply system element.

8. A Zone Protection Scheme shall be applied for 34.5kV power distribution system. In addition, the distribution circuit shall be protected by over current protection relays.

9. The power distribution system shall be designed to ensure that a single failure of an element of the power supply system shall not:

a) affect the operation or not result in failure of any other power supply system element;

b) not result in the total loss of power distribution to any part of the MMSP Line.

10. The opportunity for an incident external to the power supply system which affects the operation, or results in failure of an element within the power supply system, or results in a total loss of power distribution to any part of the MMSP Line shall be minimized.

11. The AC power distribution protection relays shall be well coordinated to ensure that no other system is affected in the event of a fault with only the faulted element isolated from the system.

12. The DC traction system shall be designed to ensure that it shall not affect the time tabled operation of trains by the loss of any DC busbar or by feeder circuit breaker outage.

13. The DC traction system shall include protective tripping to ensure that any faults are disconnected quickly. The design of the protection system shall ensure that tripping is avoided, particularly during normal operation or in the event of train bunching.


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14. It shall not be possible for faults to be masked by regenerative power from the trains.

15. A coordinated protection scheme shall be applied with 34.5 kV distribution system. The distribution circuit shall be protected by but not limited to over current protection relays.

16. The 34.5 kV receiving bus bars in each substation shall be protected by bus zone protection relays.

4.7.2 115kV System

Two independent 115kV Incoming Feeders named Feeder F1 and F2, received from 115kV MERALCO substation or via 115kV transmission line shall be supplied to Bulk Supply Substation located in Depot for the P.O Section. Similarity, two additional independent 115kV Incoming Feeders to be supplied from different 115kV MERALCO substation shall be fed into the remain Bulk Supply Substation to be constructed in the region close to Lawton West for the MMSP Remain Sections (Final Phase).

The 115kV Incoming Feeders shall be included the associated pilot cables for protection and controls and associated metering require to be installed by MERALCO.

Contractor shall interface with MERALCO for 115kV Incoming Feeders and the details of cable routes and construction.

4.7.3 34.5kV System

The 34.5kV Distribution System will be fed from 34.5kV switchgears located in the Bulk Supply Substations. Two 34.5kV interconnector circuits will be provided between the two Bulk Supply Substations. The 34.5kV distribution into the tunnels and the Depot will be achieved with the use of Ring Main systems.

Both the TSSs / SSSs on the main line and Depot shall receive 34.5kV directly supplied from Bulk Supply Substations. Contractor shall carry out the detailed studies to decide the open points for alternative back-up.

The Contractor shall coordinate the requirements for the preparation of substation layouts for the facilities of the receiving electrical equipment in the TSSs and SSSs on the main line and Depot as well as associated cable routes.

Estimated equipment capacity for the substations (TSSs and SSSs) shall be based on the total capacity required to supply the entire MMSP taken into consideration of various operation scenarios and be sufficient for 10-car train operation with 2-minute headway and Station loads to be supplied by E&M Contractors.

Two off 34.5kV/400V transformers shall be installed and supplied via 34.5kV Ring Main Units (RMUs) to be located at each Station Substation (SSSs) to provide supply of 400V AC, 3-Ph, 60Hz to the distribution system.

The 34.5kV/400V transformers and 34.5 kV RMUs shall be designed to provide to support the worst case scenario that could occur in the system.

Diagram Fig. 3 shown the 34.5kV Ring feeding arrangement which namely ‘Non-Traction’ for the SSSs as an indication. The Contractor shall undertake to revise the Ring feeding arrangement of 34.5kV loop circuit for Station Substation (SSS) in order to achieve the best voltage drops as well as to facilitate the redundant provision.

Each RMU located at SSS are fed with two (2) 34.5kV circuits received from the Bulk Supply Substations (BSS); one circuit from each end, to provide for back-up, if a fault occurs in the incoming line at any SSS, the affected SSS will be supplied from the next 34.5kV feeding substation.

The Contractor’s design shall be in accordance with Power Supply Utility Provider MERALCO regulation, through analysis and simulation, of the validity of the power supply system configuration to satisfy the


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harmonics and other requirements of the design. The Contractor shall enhance the configuration if it is found to be inadequate.

The permissible operating voltage of 34.5 kV system shall be in the range of -10% and +10% of operation voltage in accordance with the Local Electricity Authority MERALCO standard.

The 34.5 kV system shall be designed to ensure that voltage regulation under normal feeding is maintained within +10% and -10% of normal voltage at any point on the 34.5 kV system and shall ensure that it is maintained within MERALCO’s allowance under any single outage condition. Contractor shall consult with MERALCO for compliance.

All 34.5kV system shall be designed to support the ultimate capacity operation of the MMSP System.

34.5 kV/0.4 kV distribution transformer shall be installed at each Station Substation.

In Depot, looped 34.5kV power distribution line systems shall be designed and provided.

4.7.4 DC Traction Power System

The DC traction substations shall provide power to the overhead catenary system with DC traction supply at a nominal 1500 VDC and return shall be via the running rails.

The Traction Power System shall fully meet the requirements of EN 50163 for a traction supply at nominal 1500V DC. The TPS shall be capable of meeting the entire demand of peak time service permanently with one adjacent TSS out of service and as the reduced voltage may result in reduced train performance, the TPS voltage shall not fall to less than 1000V DC, under the worst operational mode and supply system voltage.

The instantaneous voltage at any train along the route shall not fall below 1100 VDC during normal operations with all substations in rated service and shall not fall below 1000 VDC with any abnormal operating condition under any single outage condition. Contractor also advised to interface with Rolling Stock for the design purposes.

The DC traction system shall be designed to coordinate with the train operation. The DC switchgears, disconnecting switches and cables shall have current ratings compatible with the most onerous loadings envisaged for the system.

Total thirteen (13) Traction Substations (TSSs), and one (1) Sectioning Post (SP) are planned to be constructed and locate at the following site locations and shown on Major Feeding Line Diagram titled ‘Traction Major Line Feeding Arrangement (Final Phase)’.

Two (2) rectifier banks shall be installed at every traction substation and shall have estimated capacity sufficient for 10-car train operation with 2-minute headway. One rectifier unit shall be for normal operation and the other for standby backup system.

In the two rectifier banks, normal operation and standby shall be alternately performed every month in order to average the operation time of the equipment.

Preliminary design calculation study estimates Thirteen (13) DC traction substations, including the main track, airport track, and Depot, and one (1) sectioning post, as shown for information on the Major Line Feeding Arrangement. The Contractor shall undertake his own studies, calculations and analysis and confirm the required number, sizing and location of traction substations.

One DC feeder circuit breaker for each traction substation shall be provided for DC feeder redundancy system. This standby circuit breaker shall be able to operate by changing over of disconnecting switches to isolate the failed circuit breaker.


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Linked braking system utilizes optical fibre cables shall be prepared for DC traction feeder circuit protection between mainline TSSs.

Suitable equipment shall be proposed and provided in the appropriate locations by the Contractor to limit the rail potential to a pre-set value for personal safety consideration regarding dangerous touch potential in all circumstances including during train operation.

Applicable standards should be included but not limited to:

EN 50122-1 Protective Provision Relating to Electrical Safety and Earthing.

EN 50122-2 Protective Provisions against the effects of Stray Currents caused by Electric Traction Systems.

CHARACTERISTICS OF THE MAIN ELECTRICAL EQUIPMENT

4.8.1 General

Typical Major Feeding Line Diagrams for various parts of the Power Supply System requirements for MMSP Project shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4 as indicative. Contractor shall review the Power System Supply feeding arrangements for both main line and Depot to ensure the compliant of the operation requirement.

The AC power distribution system shall be designed to ensure continuity of supply and the specified system performance under single outage conditions.

The AC power distribution system shall be provided with a protection system to ensure that in the event of a faulty element is isolated; no other equipment is disconnected by the operation of such a protection device.

The power system design shall ensure that cables and equipment shall be separated and protected to ensure that a single failure of an element of the power supply system shall not result in the total loss of power distribution to any part of the Line, not affect the operation and not result in failure of any other power supply system element;

A Zone Protection Scheme shall be applied for 115kV and 34.5kV power transmission and distribution system. In addition, the transmission and distribution circuit shall be protected by over current protection relays.

4.8.2 115kV Bulk Supply Substation

The Substation installation is subject to various faults such as operating over voltages, short circuits or lightning. In order to ensure protection to people and equipment, an Earth mesh, sized to limit the earth rise potential, step and touch voltages below the acceptable values, shall be provided.

The Earth Mesh design and installation shall be done in accordance with relevant provisions in IEEE 80-2000. Earth network should be designed taking into account temperature rise under fault current levels. The temp shall not exceed as permitted by the type of joints. Earth mesh has to be linked, by means of two conductors of appropriate size to:

i. The earth mesh and general earthing;

ii. All equipment structures supporting 115 kV and 34.5kV equipment;

iii. Baffle walls between transformers;

iv. Bunds and associated sump pump comprise of water, oil separator and control to be built for each transformer;

v. 34.5kV/400V Auxiliary Transformer;


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vi. 400V AC Switchboard;

vii. Lightning protection; and

viii. Surge protection and Neutral Earthing Resistor etc.

The Contractor shall provide independent voltage transformers (VT) and current transformers (CT) in the BSS for metering electrical energy on each incoming feeder. To be commensurate with the Local Utility Provider MERALCO requirements of energy metering.

The Contractor shall also coordinate with MERALCO for the details, ratio, accuracy and capacity for the voltage transformers and the current transformers at the design stage of installation.

The busbars of 115kV and 34.5kV switchgear shall be extendable for future use.

It is to point out that the land of BSS is generally filled up soil and has variation of resistivity with respect to depth. Contractor shall measure the resistivity and may also have to apply multiple layer model for design of Earth Mat.

One 34.5kV Switchboard shall be provided at each Bulk Supply Substation. Each 34.5kV Switchboard shall consist of a single, two section busbar. The sections in each switchboard will be coupled by a bus-sectionalising circuit breaker. Each 34.5kV Switchboard shall accommodate the incoming feed from the 115kV/34.5kV Power Transformer, interconnector circuits, outgoing feeders for the Ring Main Systems and the Auxiliary Transformer feeder at each Intake Substation. The switchgear will be equipped to facilitate SCADA control and monitoring requirements.

In order to avoid circulating current problems, each 34.5 kV Switchboard will operate as a separate entity, with the facility to be coupled together.

Adequate spare space provision shall be made to accommodate the installation of additional equipment and busbar extension.

4.8.3 Overhead Contact System (OCS) Supply

The extent of supply from the TSS to the OCS shall include all necessary lineside switches, isolators, etc. required for the installation on the switching stations/feeding posts/gantries in Main Line and Depot, 1500V DC cable and cable connections from TSS to OCS; and DC negative cables and cable connections from the running rails to the Negative Return panels at TSS and rail bonds.

4.8.4 Traction Substation (TSS) Equipment

Each Traction Substation (TSS) shall provide power to the OCS with DC traction supply at a nominal 1500V DC and return shall be via the running rails and return current cables.

The 1500V DC Traction Substations shall include rectifier transformers, rectifiers, high speed circuit breakers, associated switches, protection, earthing, negative return panels and any other item required to complete the work.

Incoming Circuit Breakers (CB) of the single pole High Speed Circuit Breakers (HSCB) shall be installed between the rectifier group and 1500V DC Positive busbars and shall be interlocked with the traction transformer incoming CB.

For connecting the negative terminals of the rectifiers with negative bus bars, motorized no load switches, interlocked with corresponding HSCB & Disconnector Switches shall be provided.


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From the 1500V DC positive busbar, feeder HSCB & DC disconnector switches shall be provided to feed power to the overhead line.

Bypass breakers shall also be provided for bridging the supply in case of the failure of the OCS feeding breakers.

Drainage circuit to be installed at the traction substation to provide a polarized electrical circuit between elements requiring stray current drainage and the negative busbar of the traction substation.

The TSS equipment shall be included but not limit to:

A. 34.5 kV Switchgears

The 34.5kV switchgears shall be equipped with all measuring and protective devices.

Depot TSS Installation

34.5 kV Outdoor type, metal enclosed gas insulated switchgear should be adopted.

Main Line TSSs Installation

34.5 kV Indoor type, metal enclosed gas insulated switchgear should be adopted.

The 34.5kV shall be designed and manufactured but not limit as follow:

a) All 34.5kV switchgear shall be in accordance with the requirements of IEC 62271.

b) The 34.5kV feeder shall include but not limited to 34.5 kV circuit breakers complete with all CTs. PT, meters, indicators, earth switches, etc.; required for the successful operation.

c) Each 34.5kV switchgear unit with circuit breaker shall be designed with adequate current ratings and short circuit braking duty according to its intended function. Conductors for the busbars and various connectors shall be of copper, adequately dimensioned for the normal and short circuit ratings. Wherever necessary expansion joints shall be provided to compensate for thermal expansions.

d) 34.5 kV incoming feeder(s) and 34.5 kV circuit breaker units, bus couplers for the protecting the rectifier transformer and distribution transformer.

e) 34.5 kV circuit breaker’s short circuit current rating shall be sized to safely interrupt the short circuit current under the breaker’s tested condition. Likewise, the circuit breaker’s interrupting capacity shall trip the highest current at rated voltage.

f) 34.5kV switchgear shall be the compact module type in design, metal enclosed and suitable for indoor and below ground level installation. The switchgear shall be protected from total dust ingress and protected from long term immersion up to specified pressure. The 34.5 kV switchgear shall be comprised of the following:

i) Air insulated vacuum circuit breakers which can withdraw;

ii) SF6 gas insulated fixed mounted vacuum circuit breakers; and

iii) SF6 gas insulated vacuum circuit breakers which can withdraw.

Note: All SF6 switchgears must be leakage free and are suitable for below ground level installation.

g) The 34.5 kV cubicles shall be protected against fire by means of an 'automatic fire detector and


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extinguisher system', 'Fire trace' type or equivalent, with provision of alarm. Rectifier, rectifier transformers and ESS cabinets also require Fire trace type or equivalent protection. All equipment and systems shall comply with the standards, rules and regulations which are applicable in Philippine.

h) Switchgear shall be based on Air insulated vacuum / SF6 circuit breakers which can withdraw. Contractor shall study the effect of the overvoltage generated due to break of max. possible fault and its impact on the transformers. The transformers shall be designed accordingly.

i) The 34.5kV switchgear shall be designed for the following minimum ratings and not exceed 2.5 p.u. over voltages for any switching or breaking duty.

j) Rated voltage: 36kV.

k) Number of phases: 3.

l) Rated frequency: 60Hz.

m) Rated short circuit breaking and making capacity shall meet the 34.5kV system fault level not less than 25kA.

n) Rated current: 1250A with busbar rating of 2500A (1250A for ring breakers) or 630A with bus bar rating of 2000A. Contract shall undertake studies to confirm the busbar rating.

o) The 34.5kV switchgear shall include earthing switches with the interlocking facility to ensure that the earth switch is not closed when cable is charged and similarly the feeder is not closed when the cable is earthed at any point.

p) Current transformers of suitable ratings and temperature class for protection and measuring, Voltage transformers of suitable ratings and temperature class for protection and measuring.

Auxiliary power supply voltage for operating device: 110V DC.

Auxiliary power supply voltage for auxiliary circuit: 230/110 V AC.

q) 34.5kV switchgear shall be metal clad type. Metal clad type is not necessary for line isolator. Earthing switch shall be provided in all outgoing and incoming cubicles.

r) AC Switchgear Protection shall include but not limit to the following:

i) Bus zone protection;

ii) Phase overcurrent protection;

iii) Ground overcurrent protection;

iv) Negative sequence voltage relay; and

v) Lock-out relay.

B. Rectifier Equipment

The Rectifiers shall be designed in accordance with the IEC 60146, IEC 60971, EN 50327, EN 50328, EN 50124, EN 50122 and EN 50163. Rectifier shall be designed to run in parallel. Each rectifier transformer and rectifier set combination shall incorporate full load overall efficiency of not less than 98% and power factor of not less than 95% lagging.


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Each rectifier transformer and rectifier set combination shall provide linear inherent DC voltage regulation for the full load voltage of not less than 6% of the full load voltage, from light transition load (approximately 1 %) to 100% full load and shall be as linear as technically feasible up to the 300% full load current. The inherent voltage regulation at 300% full load shall ensure that the voltage at the rectifier load terminals compliant with EN 50163.

The output DC voltage for each rectifier transformer and rectifier set combination, at light transition load, shall not exceed the limit specified in EN 60163.

The DC traction supply system shall be designed to provide a voltage that is self-limiting at no load as specified in EN 60163.

Rectifier Ratings

Rectifiers shall be rated in accordance with the parameters set out in Table 4 below:

Table 7: Rectifier Rating

Description Rectifier Rating

Type Indoor type twelve pulse converter with two parallel / series* connected

six pulse converters

Rated input voltage 3 Ph, 60 Hz, AC from Dd0Dy5 Vector group Rectifier Transformer (fed

from 34.5 kV, 3-phase, 60 Hz supply, which remains sensibly sinusoidal)

Rated output voltage 1500 V DC

Maximum output

voltage

1800 V (as per EN 50163)

Rated current 4000/1.5= 2666 A Continuous

Rated output power 4000kW

Internal impedance 8%, however, shall be majorly governed by voltage drop study and

determination of safe short circuit current.

Operation rating 100% continuous, 150% for 2 Hrs, during an interval of 3 Hrs., 200% for

5 minutes or 300% for 1 min during an interval of 30 min.

Rated Short circuit

withstand current

25 kA

No. of pulses 12

Ripple Within 4.5%

Connection AC busbars between rectifier transformer and rectifier

Cooling AN, Natural air convection

Short circuit withstand

level

The rectifier shall be protected against DC short circuits by AC breakers

provided on 34.5kV side. The fault clearance time shall not exceed 8

cycles. The rectifier unit shall be capable of withstanding this short circuit

level.


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The selection of series/parallel connection shall be done by Contractor keeping voltage drop and short circuit currents within the design limits as per international standards and best practices.

The transformer rectifier set shall meet following criterion:

a) Open-arm diode detection shall be provided and shall be monitored by the SCADA system.

b) The equipment covered by this specification shall be run in parallel. The rectifier unit shall be equipped with surge protective devices to limit the reverse voltage across the silicon diodes to a value within the peak-reverse-voltage rating of the diode, irrespective of whether the voltage transient originates in the AC or DC power circuits. Protection shall also be provided against lightning surges on the cathode and anode circuits.

c) Silicon Diodes shall be hermetically sealed and mounted on adequate heat sinks. Parallel strings of diodes shall be electrically and geometrically similar, and as symmetrical as practicable, to help balance the normal and surge electrical characteristics of each string. The rectifier shall be capable of carrying the specified overloads and short circuit loads with one diode removed from service from each leg of the rectifier circuit without exceeding safe junction diode temperature.

d) Each diode shall be capable of withstanding, at its maximum operating temperature during blocking periods, voltages having a value of 2.5 times its working peak reverse voltage, without a permanent change in diode. The rectifier shall be designed to maintain current balance between parallel-connected diodes in each phase. This current balancing scheme shall hold individual diode currents within their capabilities under all load conditions, with one diode per leg removed. Current balancing shall not only be achieved by use of selectively matched diodes.

e) The rectifier cubicles shall be protected against fire by means of an 'automatic fire detector and extinguisher system', 'Fire trace' type or equivalent, with provision of alarm.

When adopting a natural cooling system and connecting diode in parallel, diode fuses shall be provided to disconnect any faulty diode.

Rectifier sets shall be rated for voltage of nominal 1500 VDC at continuous load (full load).

C. Rectifier Transformer

Rectifier transformer shall be used to provide the power to rectifiers. The main characteristics of the transformer shall be as set out below:

a) Rectifier transformers shall be designed in accordance with JEC 2410-1998 or equivalent equal and shall incorporate an earthed metal screen between high voltage and low voltage windings, if necessary.

b) Rectifier transformers shall be rated to supply the full 1500V DC traction system load within the continuous rating, with any one rectifier transformer out of service and without ESS. The rating however shall not be less than 4.2 MVA. They shall also be designed to meet the parallel operation requirements.

c) The overload ratings of rectifier transformers shall be utilized to accommodate any abnormal loading in the event of train bunching or due to any abnormal DC traction feeding arrangements.

d) Off-load tapping links shall be provided on the high voltage winding to provide rated output at +5.0% to -5.0% of nominal supply voltage, in increments of 2.5%. Tap indicator position shall be visible through a viewing window.


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e) Two secondary windings shall be provided, one connected in star and the other one connected in delta, to provide double six phase supply to the rectifier.

f) Rectifier transformers shall be fitted with a temperature alarm device, and temperature tripping and pressure alarm and gas pressure tripping to be monitored by the SCADA.

g) Rectifier transformers shall be DRY type to have anti-flame-able characteristics.

Rating

The Rectifier Transformer shall be designed for the rating and other particular to suit the requirements of rectifiers. The ratings given in Table 8 below are the minimum. The Contractor shall verify the same through simulations and if required shall propose the higher rating for the successful operation of the MMSP Project.

Table 8: Rectifier Transformer Rating

Description Rectifier Transformer Rating

Type Three phases, cast resin dry type, cubicle enclosed Step down, indoor

installation for feeding to 12 pulse silicon rectifier assembly with two

series or parallel type six pulse converter

Configuration Dd0Dy5

Rated input voltage 3 Ph, 60 Hz, 34.5kV AC

Rated output voltage LV1 & LV2: - As per the Series/ Parallel connection of rectifier.

Nominal rated power

Primary

Minimum 4.2 MVA. To be validated by Contractor

Nominal rated power

secondary

To be advise

Overload capacity To suit duty cycle of silicon rectifier i.e. 100% continuous, 150% for

2 Hrs, during an interval of 3 Hrs. 300% for 1 min during an interval

of 30 min.

The overload capability of the rectifier transformer should match that

of the rectifier units’

Tap changer Off-load

Tapings Off circuit tapping to be provided to give the rated voltage on the

secondary for primary voltage variation of (+) 7.5% and (-) 7.5% in

steps of 2.5 %. The tapping shall be on HV sides and capable of

carrying full load current and over loads as specified.

Rated short circuit

withstand duration for HV

winding

1 second

Insulation class HV: - F Class LV1, LV2: - H Class or higher


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Cooling AN or AF

Temperature rise The temperature rise of windings and core shall not exceed the

permissible values as per IEC 60076.

Insulation rated voltage HV: - 36 kV

Primary Winding Power

frequency withstand level

70 kV

Primary Winding Surge

withstand voltage

170 kV

Fire behaviour class F1

Temperature Protection

All transformers shall be fitted with a temperature protection system that allows winding temperatures to be monitored. Temperature monitoring devices with two thresholds (alarm and tripping) must be provided and located on the upper part of the secondary windings. The cubicles shall be protected against fire by means of an 'automatic fire detector and extinguisher system’, flooding type system, complete with CO2 Gas cylinder and alarm.

Noise

Every care shall be taken to ensure that the noise produced by electrical machines/ equipment is minimum. Necessary noise reducing methods may be applied and the noise at the machine shall not be more than as specified in the applicable international standards. For transformers, the relevant noise level as per (National Electrical Manufacturers Association) NEMA shall be applicable.

D. 1500V DC Switchgear HSCB, Isolators

1500V DC Indoor type air insulated switchgear for Rectifier Positive protection.

1500 V DC Indoor type air insulated disconnecting switches for Rectifier Negative separation.

1500V DC Indoor type air insulated switchgear for DC feeder protection.

The DC traction Sub-Stations shall provide power to the OCS with DC traction supply at a nominal 1500V DC and return shall be via the running rails and return current cables.

The 1500V DC traction Sub-Stations shall include rectifier transformers, rectifiers, high speed circuit breakers, associated switches, protection, earthing, negative return panels and any other item required to complete the work.

Incoming Circuit Breakers (CB) of the single pole High Speed Circuit Breakers (HSCB) shall be installed between the rectifier group and 1500 V Positive bus bars and shall be interlocked with the traction transformer incoming CB.

For connecting the negative terminals of the rectifiers with negative bus bars, motorized off load switches, interlocked with corresponding HSCB & Disconnector Switches shall be provided.

From the 1500V DC positive bus bar, feeder HSCB & DC disconnector switches shall be provided to feed power to the overhead line.


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All high voltage switchgear shall be designed and manufactured in accordance with the requirements of IEC 61992, IEC 62271, and IEC 60298 as applicable.

E. 1500V DC Switchgear

DC switchgear comprising DC high speed circuit breakers shall be provided for switching off the rectifier DC incoming feeds and outgoing feeds to OCS. The DC switchgear shall be equipped with necessary functions for SCADA control and indication. All breakers shall have trip free and anti-pumping facility suitable for automatic re-closing. All breakers shall have service and disconnected positions. When the breaker is in test position, local/remote switching and trip tests shall be able to be carried out.

The DC switchgear shall be of metal-clad multi-cubicle type installed on the insulation pad for isolation from earth and AC system earths, equipped with enclosure fault detection, with withdrawal circuit breakers for positive pole switching and isolating. It shall be complete with all the current transformers and voltage transformers of adequate capacity and requirements and as per IEC 60044. It should have all necessary interlocking and safety features. Negative connections shall be a collector bar incorporating earth returns and monitoring. Rectifier circuits shall incorporate reverse current tripping.

The DC switchgear shall be inclusive of circuit breakers and isolators cubicles shall be protected against fire by means of an 'automatic fire detector and extinguisher system', 'Fire trace' type or equivalent, with provision of alarm. In addition, Contractor shall comply with the standards, rules and regulations which are applicable in Manila, Philippines.

Lightning and switching surge arresters shall be provided for feeder and inter-tripping cables of feeder circuit breakers and sectionalizing switches. The DC switchgear enclosure shall be insulated from ground by an insulated floor topping extending one meter around it and allowing for circuit breaker removal from the front. The DC switchgear with minimum ratings shall be provided in accordance with the following parameters, however Contractor shall verify the adequacy of switchgear ratings using the simulation.

The DC switchgear shall equip but not limit to following:

1. HSCB, protection for Rectifier Positive circuit minimum includes:

DC HSCB

DC current transformer for reverse current protection

Relay for reverse current protection function

Fault indicator

Mimic bus

All protection relays as may be required.

2. DS, isolation and protection for Rectifier Negative circuit minimum includes:

DC Negative Disconnecting Switch (manual)

DC current transformer for measurement

Relay for grounding protection (64P)


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Fault indicator

Mimic bus

3. HSCB, protection for outgoing feeder circuit minimum includes:

DC HSCB

DC current transformer for over current protection and rate of rise of

current protection


DC lightning arrester for open section

DC Disconnecting Switch (Motor operation)

DC Disconnecting Switch for stand by HSCB (Motor operation)

Relay for above function.

Fault indicator

Mimic bus

4. Stand by HSCB for outgoing feeder minimum includes:

DC HSCB

DC current transformer for over current protection and rate of rise of protection


Conversion switch for stand by function

Relay for above functions

Fault indicator

Mimic bus

5. DC switchgear for the regenerative Positive circuit minimum includes:

DC HSCB

Relay for above function.

Fault indicator

Mimic bus

6. DC switch gear for the regenerative Negative circuit minimum includes:

DC Negative Disconnecting Switch (manual)


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Fault indicator

Mimic bus

All DC switchgears shall be isolated from the ground and the switchgears shall be rigidly fixed to the floor with anchor bolts.

Negative connections shall be a collector bar incorporating negative returns and monitoring.

Rectifier circuits shall incorporate reverse current tripping.

OCS contact feeder protection shall detect short circuit (by direct acting trip devices in DC circuit breakers) and limited faults (by multifunction relay with DC fault selective device) but shall not cause tripping due to load current in other normal operating modes.

In the event of OCS contact feeder failure, all the circuit breakers for feeding the same track and the same section shall trip automatically with Tele-command braking devices.

In the event of OCS contact feeder protection failure, all the circuit breakers for feeding the same track, the adjacent section of failure section, all the circuit breakers for feeding another track shall be opened automatically.

It shall be attached to a DC WHr meter on the 1500V DC feeder for PRI in Depot TSS so that the power of 1500 V DC used in PRI can be recorded.

F. System Nominal Voltage 1500V DC

Rated current shall be a minimum of 6000A for bus & 4000A for HSCB outgoing however, Contractor shall design and validate the ratings as per calculations, studies and standardization. The Indicative ratings of HSCB are given in Table 9 below:

Table 9: High Speed DC Switchgear Ratings

No. Description HSDC Switchgear Rating

1 Type Indoor horizontal type suitable for floor/ pedestal

mounting on insulation pads

2 Highest Service Voltage 2000V DC

a Rated voltage 1800V

b Rated insulation voltage 3000V

c Operational over-voltage peak < = 2500V

3 Current

a Rated continuous current Incomer

Feeder

Line Feeder

Bypass

4000A

4000A

4000A

b Overload ratings 100% continuous, 150% for 2 Hrs, during an interval of 3

Hrs, 300% for 1 min during an interval of 30 min.


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Note: The overload capacity of the rectifier transformer

should match that of the rectifier unit.

c Busbar Rating 6000A

4 Inherent tripping time Opening time not more than 5 ms and total break time not

more than 20 ms

5 Mechanical lifetime More than 40000 cycle

6 Rated braking current 70kA or higher as per requirement

7 Degree of protection >IP 31

8 Operation Cycle 0-15sec-CO

G. Negative Disconnect Switch and Negative Switchboard Assembly

Negative disconnect switches shall be mounted, have an insulated operating handle and shall be interlocked with the rectifier main circuit breaker.

Interlocking shall prevent opening the negative switch when the breaker is closed and prevent closing the breaker when the negative switch is open.

The negative switch shall be rated to suit the installed HSCB as a minimum and shall have momentary current rating equal to that of the rectifier main circuit breaker. Negative disconnect switch and 1500V DC negative cables shall be capable of withstanding the thermal and mechanical stresses associated with the available short circuit current at the rectifier output.

H. Negative Return Busbar

The DC negative bus shall be rated 1500V DC, to suit the complete DC switchgear and shall be of sufficient strength to withstand the short circuit current available from two 4000 kW rectifier units and ESS, and shall be of sufficient length for connecting the required number of negative return cables from the tracks, cables/bus ducts from each rectifier unit, and a running rail grounding.

I. Energy Storage System (ESS)

During braking, the induction traction motor on the train consumes reactive power that magnetizes the stator and rotor windings and generates real power back to the system. The amount of power regenerated depends on the receptivity of the line which in turn depends on the load location, allowable voltage band for regeneration and distance between the TSS, under no load, the brake power is wasted in frictional losses.

The addition of the Energy Storage System (ESS) shall make the Overhead OCS (OCS) receptive to taking regenerated power at all times and remove the dependence of regenerative braking upon the presence of an accelerating train in the same section as the braking train.

The Contractor shall design, manufacture, and supply eight (13) ESS units. Each ESS unit shall have a capacity of at least more than 500kW which shall be decided based on a power simulation finally, using Li-ion technology batteries as the storage medium. The design life of the ESS shall be 30 years. The battery life shall be not less than 15 years design life or the suitable design life in consideration of Life-Cycle-Cost of ESS's design life (30 years).


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Contractor shall also be responsible for performing the detailed simulation studies to assess the capacity of ESSs and that can be replaced rectifier units, as OPTION 2 proposed shown in Fig. 4.

ESS Functional Requirements

The energy storage system shall be designed to meet the following functional requirements:

d) It shall store regenerative braking energy and shall give it back to the system to improves the energy efficiency.

e) Provides voltage stabilization on the DC traction power line.

f) Peak demand reduction.

g) Under the scenarios of power failure from grid, ESS shall also act as off-grid power supply source for bringing the trains of Main Line up to the platform, that is ESS shall also provide the capability to move the train to the next station for passenger disembarkation at the station in the case of power failure on a section of the line or a power failure on the entire line.

h) The Contractor shall design the ESS so that the maximum technically possible regenerative power is consumed and used.

i) The Contractor shall declare the number of trains stuck in a section under various operational timetables which can be bought up to the platform. The Contractor shall also prepare an operational methodology and detailed procedures setting out the actions by which the maximum number of trains stuck in the section can be bought up to the platform during grid failure.

j) The space earmarked for ESS at the specified location has been given in the drawings and it will not be possible to increase the size of room.

ESS Characteristics

The characteristics of ESS shall be designed using simulation study to take into consideration the following factors:

a) The no. of charge /discharge cycles as well as energy storage characteristics of ESS shall be commensurate with the no. of stopping and starting required as per track plan/operational plan so that the design life of 30 years is achieved.

b) Energy storage capacity is also determined by the requirement of power level during starting.

c) The ESS shall have power control system to make it compatible for all operating modes and balance the load current between convertor cabinets.

d) It shall maintain time stamped log file of metered energy flow twice a day & fault levels.

e) The power density, Energy density and capacity of the batteries of ESS shall match with the requirements ascertained after conducting simulation study under the operational scenarios.

ESS General Requirements:

a) Regeneration power storage equipment using Li-ion battery technology shall have proven satisfactory service experience, and evidence shall be provided to show satisfactory operation of similar system in commercial Metro service for a minimum period of one year.


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b) The regeneration power storage equipment shall be suitable for Metro system operation at 1800V DC.

c) ESS shall be used to prevent regeneration lapses by maintaining adequate absorption capacity during normal operation and shall have a function which supplies sufficient power to stopped vehicles between stations to restart running to the nearest station in case of a power outage.

d) ESS shall have a function of 'Black Start' under a power outage. All the power to restart the equipment and the supply to the vehicles in emergency operation shall be supplied by the batteries of the equipment.

e) The regeneration power storage equipment shall be able to withstand the strains, jerks, vibrations and other conditions incidental to shipping, storage, installation and service use without degradation in performance.

f) Components which perform identical functions within the regeneration power storage equipment shall be electrically and mechanically interchangeable.

g) The regeneration power storage equipment shall be designed for quick restoration of service in the event of a service affecting fault.

h) The regeneration power storage equipment shall be designed to operate in the environment in which it is installed and to withstand the effects of high temperature, humidity, vibration, noise, and air pollution.

i) The Mean Time Between Failure of the ESS leading to the system being unable to perform the traction power energy saving shall be at least 30 years while availability shall not be less than 99%.

ESS Technical Requirements:

1. The ESS shall consist of control equipment, electronic switching circuits, filter device and power storage equipment. The regeneration power storage equipment shall be connected to the positive busbar of the DC switchgear through the highspeed DC circuit breaker and negative busbar of the rectifier through the negative isolator. The ESS shall be interlocked with the DC circuit breaker and the negative isolator to ensure the correct operation of the equipment.

2. The ESS assemblies shall be housed in an appropriately ventilated approved sheet steel type enclosure, free-standing, forced cooled type assemblies with pad lockable doors. Access and internal arrangement shall allow for easy inspection and maintenance.

3. All live parts and components shall be insulated from the enclosure, and the clearance and creepage distance shall comply with the relevant requirements as specified in EN50124-1. The enclosure shall be earthed to the TSS earth trough leakage detection.

4. The ESS shall mitigate the current of regeneration power to the OCS and batteries through bidirectional electronic switching circuitry.

5. IGBT's in the electronic switching circuits of the ESS shall regulate the voltage and current of the regenerated power.

6. Door open detection protection equipment shall be provided to trip the DC circuit breaker for the ESS in each enclosure of the ESS to protect against electric shock from direct contact with the live parts inside when the panel door is being opened.


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7. The ESS shall be provided with protection device to limit the contribution of fault current from the ESS when OCS or busbar fault occurs.

8. The ESS shall be provided with isolators or withdrawable circuit breakers to isolate the ESS from the DC positive busbar, DC negative busbar, battery positive and negative poles.

9. The ESS shall be provided with the flush mounted digital indicating & recording instrument to indicate and record the following:

a) Charging Voltage (V);

b) Discharge Voltage (V);

c) Charging Current (A);

d) Discharge Current (A);

e) Charging Energy (kWh); and

f) Discharge Energy (kWh).

10. The ESS shall initiate local and remote alarm if any of the following conditions occurs:

a) IGBT over temperature (1st stage);

b) DC traction power supply over-voltage (1st stage);

c) DC traction power supply under-voltage (1st stage); and

d) ESS ventilation fan failure.

11. The ESS shall automatically trip the DC circuit breaker and initiate local and remote SCADA alarm if any of the following conditions occurs:

a) IGBT over temperature (2nd stage);

b) IGBT over-current;

c) DC traction power supply over-voltage (2nd stage);

d) DC traction power supply under-voltage (2nd stage);

e) Battery over temperature;

f) Battery current unbalance;

g) Battery controller abnormal;

h) Battery over-charge;

i) Battery over-discharge;

j) Battery over-voltage;

k) Battery over-current; and


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I) Earth fault.

J. Sectioning Post (SP) Equipment

DC 1500 V Switchgear

DC 1500 V Indoor type air insulated switchgear, for DC feeder protection 400 / 230-115 V Indoor type transformer cubicle (For 400 / 230-115 V operation transformer).

It shall be draw 400V, 3-Ph LVAC from Lawton East Station and Lawton West Station respectively and shall be switched power supply by power outage.

K. Current Transformer (CT) & Voltage Transformer (VT)

The current transformer (CT) shall be designed to be compliant and meet the following requirements:

a) Design and installation shall be in accordance with IEC 60444-1 or equivalent, and

b) Class and rating shall be suitable for metering, monitoring and protection requirements.

The voltage transformer (VT) shall be designed to be compliant and meet the following requirements:

a) Design and installation shall be in accordance with IEC 60444-2 or equivalent; and

b) Voltage transformer’s accuracy class shall be suitable for metering, monitoring and protection requirements.

L. Surge Suppression

The DC traction supply voltage shall be permitted to rise to a maximum of 2100V DC during the regenerative breaking of the trains. In addition, the DC traction system shall sustain transient voltage surges category OV4 as per EN 50124 between the positive and negative poles.

Suitable surge and transient absorption circuits and surge diverters shall be provided to protect the rectifier sets from the effects of lightning strikes on the overhead contact and running rail.

M. Short Circuiting Devices

This specification applies to negative earthing contact equipment ("Short Circuiting Device" or "SCD") also referred to as OPVDs (Overvoltage protection devices for track) housed in track earthing panel for 1500V DC system to be installed in the TSS for control and protection against voltage difference between Running Rail Voltage and the Substation earth busbar.

Short Circuiting Devices shall be installed in all stations with TSS. At other stations, the device shall be installed in the SSS.

In TSS the device shall be connected to negative return panel and to the return rail where it is installed in an SSS respectively. The rails at stations shall be connected through appropriately sized insulated conductors.

EN 50122-1 prescribes the tolerable I safe value of running rail potential for different time intervals and in the event of running rail potential breaching these values, the SCD shall operate and earth the return circuit (to Substation earth).


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Resetting of SCD after operation shall be as per the provisions of EN 50122-2. To achieve this, the SCD shall be provided with necessary numerical relays.

The proposed Short-Circuiting Device shall essentially consist of following devices:

a) Redundant voltage measuring unit;

b) Current measuring unit with shunt;

c) Heavy duty switch rated to withstand maximum short circuit current;

d) Redundant trigger unit for switch;

e) Programmable Logic Controller/lED;

f) Provision for power supply cable connections;

g) Return circuit;

h) Structure / Sub-Station earth;

i) Special over-voltage relay suitable for detecting both positive and negative over-voltage with respect to earth; and

j) Instantaneous over current protection for SCD.

The PLC shall have defined protective characteristics for DC and AC voltages. It shall be possible to define user characteristics for DC and AC voltages. It shall be possible to continually view the values of monitored voltage, current and contactor state on the HMI mounted on the panel and at SCADA. The Short-Circuiting Device shall also serve an additional purpose of stray current monitoring. The voltage sensed by the voltage sensing devices and the conductance of the running rail with track plinth shall be calibrated in terms of stray current in the system. These values shall be transmitted to SCADA for monitoring. Additional logics shall also be developed to initiate an alarm in case of failure of insulation between running rail and track plinth. In addition, provisions shall be made for connection of SE cable to negative return path through diode only for the purpose of periodical monitoring of stray currents. Under normal operations, switch provided for this connection will be in normally open (NO) position and switch will be closed for monitoring of stray current once or twice in a year as required.

N. Isolating and Earthing Facilities

Isolating and earthing facilities shall be provided in order to enable maintenance to be carried out safely on the rectifier transformers and the rectifier sets.

O. Battery and Battery Charger

110V DC supply for control and protection shall be provided for use at BSS, SSS, TSS and Sectioning Post. The Contractor shall provide nickel-cadmium, maintenance free 110V batteries complying with IEC 60623 system for safety tripping, service current functions and power to the SCADA remote terminal units. The batteries shall have design life of 15 years. The battery system shall be rated to supply the standing loads for a minimum of 08 hours in the event of a charger supply failure, and at the end of that period shall be capable of operating each item of equipment for two cycles, i.e. one cycle is open and close. The end cell voltage shall not be less than 1.05 volt.


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Contractor shall validate the capacity after considering all applicable de-ratings as per relevant standards. It shall not emit hazardous gases. The number of battery chargers shall be one more than the number of battery banks so that at least one battery charger is available as a standby in case of failure of one charger.

Battery chargers main and standby shall comply with IEC 60146 or equivalent and latest versions and shall be provided with self-regulation and shall be capable of restoring a minimum of 80% of battery capacity within 10 hours of full discharge. For better compatibility, the battery and battery chargers shall be supplied from same manufacturer. Sufficient indications shall be provided on the battery charger to provide status information of the battery charger system, as a minimum this shall include battery voltage, trickle charge and booster charge currents, battery charge functioning and battery charge failure. In addition, status information about the value of voltage and the status of healthiness and unhealthiest of the charger shall be provided to the SCADA system. Battery chargers shall incorporate measuring instruments such as ammeters and voltmeters as a minimum. A DC distribution board to safely receive the DC power through circuit breaker of adequate capacity and similarly distribute the outgoing power to various circuits as required through circuit breakers shall be provided.

Ripple content in the output voltage in any case shall not be more than 3%. Battery charger shall have Automatic change-over from floating to equalization charge and conversely. Following any failure of more than five minutes of the AC supply network, the charger shall automatically revert to the charge position right upon return of the voltage and shall remain on this position for an adjustable time. After this time, the charger shall return to floating operation. The charger shall remain in floating operation if the network failure is shorter than five minutes.

The batteries and battery chargers to be installed at each site shall be the Ni-Cd type.

P. Battery Units

a) For the traction substations, and sectioning post, the Contractor shall provide 110V battery system for safety tripping, service current functions and power to the SCADA remote terminal units.

b) The battery system shall be rated to supply the standing loads for a minimum of 8 hours in the event of a charger supply failure, and at the end of that period shall be capable of operating each item of equipment for two cycles, i.e. one cycle is open and close.

c) During such duty output voltage shall be within the tolerances defined for operation in the relevant equipment specifications.

d) The 110V batteries shall be of the Ni-Cd type, maintenance free type and shall not emit hazardous gases.

Q. Battery Chargers

Battery chargers shall be provided with self-regulation and shall be capable of restoring a minimum of 80% of battery capacity within 8 hours of full discharge.

Sufficient indications shall be provided on the battery charger to provide status information of the battery charger system, as a minimum this shall include battery voltage, trickle charge and booster charge currents, battery charge functioning and battery charge failure, DC failure and battery impedance fault or battery earth fault.

In addition, status information shall be provided to the SCADA system.


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Battery chargers shall incorporate measuring instruments such as ammeters and voltmeters as a minimum.

R. Uninterruptible Power Supplies (UPS)

The UPS supply for Power SCADA shall only be required at OCC. The RTUs at stations and other places shall be installed with suitable converters. UPS shall be supplied after catering the load of various subsystems. Backup period required for various subsystems shall not be less than 4 hours.

The Contractor shall liaise with the various subsystems as necessary to determine final equipment ratings and power requirements. The Contractor shall design, install and tests of UPS system in consideration of the subsystems' requirements mentioned in the Tender Documents.

The battery used for UPS which will be for Power SCADA shall be Ni- Cd type with end cell voltage of 1.05 Volt.

The UPS shall comply with IEC 62040 and the rectifier shall be IGBT based whilst the Converter shall be of the PWM type.

The UPS will be supplied from the 400V AC Distribution Boards. The contractor shall liaise with the station Contractors in respect to the supplies on the stations, Depot and OCC.

Batteries shall be placed at least in 2 step 2 tier racks or cabinets for space saving.

The various modes of operation for UPS shall include:

a) mains UP

b) Mains Down

c) Mains restored

d) Automatic Bypass mode

e) Manual bypass for maintenance.

4.8.5 Station Substation (SSS) Equipment

Each SSS shall install with 34.5kV RMUs (Indoor Type) with all measuring and protective devices, 34.5kV / 400V cast resin dry type distribution transformers, 34.5kV cable from 34.5kV panel to transformer, 400V AC, 3-Ph distribution boards, battery and battery chargers, connection to earthing system and provision of Main Earth terminals (MET).

4.8.6 34.5kV Ring Main Units (RMUs)

The 34.5kV Distribution System will be fed from 34.5kV switchgears located in the Bulk Supply Substations. Two 34.5kV interconnector circuits will be provided between the two Bulk Supply Substations. The 34.5kV distribution into the tunnels and the Depot will be achieved with the use of Ring Main systems.

Refer to Fig. 1, Fig. 2 and Fig. 3 for 34.5kV Ring Main Unit (RMUs) feeding arrangements, as indication, to be installed on the main line and Depot. Contractor shall review the Power System Supply feeding arrangements for both main line and Depot to ensure the compliant with the operation requirements and the system is reliable.

4.8.7 Dry Type Transformer (Delta-Star) for Depot and Main Line

The minimum rating of the 34.5kV/0.4kV transformer installed on the main line and Depot shall be cast resin dry Type, oil free and shall have an overload capacity of 125% for 15 minutes after an interval of 3 hours.


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The Dry type transformers shall be designed and manufactured to comply with JEC2200-1995 and or particularly IEC60076.

Table 10: Dry Transformer Characteristics

Descriptions Indoor Operation

Operation Continuous

Winding Aluminium / Copper

Primary Line Voltage (across phases) 34.5kV

Secondary Voltage, off-load line voltage at 34.5kV 400V

Insulation rated voltage 36kV

Frequency 60Hz

Withstand at industrial frequency 70kV

Voltage Surge Withstand 200kV

Coupling Delta-Star, separate neutral (Dyn11)

Cooling Natural

Off-load Tap Changer 0, +/-2.5% and +/- 5%

Maximum Noise 65dB and 1.5m

Class of Insulation F Class

Fire behaviour class F1

34.5kV/0.4kV distribution transformers and 34.5kV/0.23-0.115 kV operation transformers shall comply with the requirements of JEC2200-1995 or equivalent equal. 34.5/1.18 kV Rectifier transformers shall comply with the requirements of JEC 2410-1998 or equivalent EN / IEC standards.

The Contractor shall determine actual rated power based on the station and all electrical load schedules to be supplied by the Civil Contractors. The Contractor’s operating plan requirements, the Contractor’s evaluation of MMSP Project power requirements.

The base of the transformer shall be designed to spread the weight of the transformer over an area as large as possible within its space envelope.

The rated insulation level shall comply with the following minimum ratings and requirement

1. Lightning impulse withstand voltage:

200 kVp for high voltage winding;

45 kVp for low voltage winding.

2. Power frequency withstand voltage for 1 minute:

70 kV for high voltage winding;

16 kV for low voltage winding.


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Neutral grounding method: According to Meralco requirements for high voltage

winding; according to neutral earthing mode of the distribution system for the low

voltage winding.

Air-filled cable box for high and low voltage termination shall be provided.

Fault detection: gas pressure and gas temperature.

Percent impedance:

Capacity: <=10 MVA

7% or more

Capacity: >= 5MVA

5% or more

4.8.8 Operation transformers

The Current transformers (CTs) and voltage transformers (VTs) shall be rated of suitable ratings and temperature class for protection and measuring. They must be designed to comply with IEC 60044.

4.8.9 400V LVAC Switchboards

The 400V AC shall be rated at 5000A, 3-Ph, 60Hz, 4W system. Contractor shall interface with relevant Civil Contractors for the necessary load studies to confirm the 34.5kV/400V to be installed at for each station.

The 400V LVAC Low Voltage panels shall be equipped with the air circuit breaker, meters, CT, PT etc. shall be provided for receiving the power at 400V AC, 3-Ph, 60Hz from both distribution transformers using half sectionalizer scheme.

In case of the SSS and TSS on the stations, the scope of LV panels is in the scope of the Building Services Contractors. In the BSS however, AC distribution boards shall be provided for the supply to the battery chargers.

The LV panels shall be provided with microprocessor base relays for protection and shall be suitably graded with the lower side of supply.

Main incomer and coupler receiving power from the transformers shall be capable of operating under Auto/Manual mode as well as local/remote mode.

Busbars (copper) and circuit breakers for the entire LV panel shall be sufficiently rated to provide the overloading and short circuit Protection.

4.8.10 Emergency Power Supply System

Emergency power supply system shall be designed and manufactured in accordance with the Philippine Electrical Code (2017 edition), the Fire Code of the Philippines and applicable standards.

Emergency power supply shall automatically start up in the event of the absence of incoming of 34.5kV supplies and shall be capable of automatically delivering the essential demanded power, up to the rated value, within 10 seconds.

The emergency generators shall be diesel type having nominal output voltage of 400V, 3-Ph, 4W system. The Contractor shall undertake details studies to determine the actual emergency loads required for the final sizing


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kVA rating of the Diesel Generator Set. The emergency generator excitation system shall be of the fast-acting type to ensure the rapid response during motor starting and sudden load change.

The emergency generator shall be designed and installed with the complete fuel storage facilities include outlets, exhaust ducts etc. and shall be capable to provide the specified performance continuously for a minimum period of 8 hours without the requirement of inspection or attention.

The emergency generator set shall be capable to withstand a sudden short circuit, maximum over-speed without any damage, as defined in JEM 13542014 or IEC 60034.

The emergency generators and exciters shall be of totally enclosed, brushless type, and shall comply with the requirement as defined in JEM 13542014 or IEC 60034. The line and neutral phase ends shall be brought out to separate terminal boxes. The winding insulation shall conform as a minimum to temperature ‘Class F’ in accordance with IEC 60034.

All necessary metering instruments, current and voltage transformers for protection, control, metering and noise control facilities shall be included. The noise control facility shall be compliant with the local codes, the environmental requirements and pollution control. All protection systems shall be able control and monitoring via SCADA.

Auxiliary power supply shall be provided by means of appropriately sized battery to enable starting the emergency generator.

The support structure for Diesel Generator shall be built to withstand the seismic or any natural caused to blackout Manila City, that has minimal impact on Diesel Generator and thus to ensure the supply is available to provide for emergency loads in the station, for the safety of passengers inside the station and or tunnel.

4.8.11 Emergency Tripping System

An Emergency Tripping System (ETS) shall be installed in the SSS room of every station with ETS boxes on every platform in accordance with internationally accepted Fire Protection Standards for fixed guidance transit systems (NFPA 130).

The Emergency Tripping System (ETS) is to achieve an electrical tripping scheme to de-energize the OCS section during emergency conditions. Upon activation of the ETS the HSCB feeding to relevant OCS Section shall trip. In addition, it shall generate a signal (interfaced with signalling system) that shall stop the train from entering the dead section. The ETS Box shall consist of a unit which is fire protected and with a breakable glass, containing the emergency push button. The ETS Boxes shall be of such dimensions, colours and characteristics that they shall be visible from 20 meters.

It shall also house a blue lamp to indicate its location and also be provided with a heavy duty hot line telephone handset directly connected to the Station Controller and the OCC.

ETS boxes shall be cabled to the nearest PLC/RTU/PLC through fire survival armoured cables capable of withstanding temperature up to 750 degree C for 3 hours and in that condition do not support combustion.

4.8.12 Protection Control and Monitoring

The purpose of protection equipment is to ensure isolation or de-energising of equipment whose operating conditions have become abnormal to avoid any major repercussions on the traffic. This means the selectivity should be ensured while designing the protection scheme. The breakers intended to trip shall only trip for the faults.

The protection and control system shall be designed to achieve a minimum of 99.99% fault detection capability of all critical faults. Contractor shall carry out details protection studies, control and monitor for the complete MMSP Power Supply Systems.


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Protection

Each protection shall have main and separate backup protection design. The same CT shall be avoided while incorporating the backup protection.

The Contractor shall be responsible for the verification and adjustment of protective relay settings to be conducted during field testing subject to the satisfaction of the Engineer.

Interlocking

The complete system shall be provided with the interlocks necessary for the safe operation of the electrical system. The interlocks shall prohibit the opening or closing of switches under conditions not intended from safety or design. e.g. opening of isolator on load, closing of breaker when the feeder is earthed even from another end. The system shall be incorporated with inter tripping for safe operation of the system. The hard interlocks shall also be duplicated in soft using SCADA.

Protective Relays All main protective relays shall be of fully numerical type and shall comply as per IEC 61850 standard. Further, the test levels of EMI as indicated in IEC 61850 shall be applicable to these. All the relays shall be directly connected to inter bay bus using Electrical/fibre optic cables and shall support peer to peer communication. The relays shall generate GOOSE messages as per IEC 61850 standards for interlocking and also to ensure interoperability with third party relays. Each relay should also generate an ICD file in XML format for Engineering / integration to a vendor independent SCADA system. All the relays shall have suitable rear and front ports for connectivity to SAS and PC/LAPTOP.

For numerical relays, the scope shall include the following:

1. Necessary software and hardware to up/download the data to/from the relay from/to the personal computer installed in the Sub-Station.

2. The relay shall have suitable communication facility for connectivity to SCADA. The relay shall be capable of supporting IEC 61850 communication standard.

3. The relays shall have fault record, event record, and disturbance record for fault diagnostic and shall have communication ports for local communication for relay settings, modifications, extraction and analysis of fault/event/ disturbance records from a laptop and for communication with Sub-Station automation system.

4. The relay shall have four independent parameter setting groups.

5. The relay shall have provision of back up protection facility.

6. The Substation Automation System (SAS) shall be installed at receiving Substations including that for the 34.5kV supply inside Depot BSS to control and monitor all the substation equipment from Operation Control Centre (OCC), and possibly Backup Control Centre as well as from local control centre.

7. Protection: The following minimum protections shall be provided in BSS.

a) 115kV incomer: Pilot wire, distance protection, over current protection, earth fault protection. Any specific protection required by the Power Supply Authorities MERALCO.

b) 115kV power transformers: Transformer shall be protected by the protections based on the electrical parameter in addition to inherent protections like, bucholz, PRV, over temp, etc. The main protection shall be transformer differential, restricted earth fault on primary and secondary, over current, earth fault, overvoltage, over fluxing, standby earth fault Transformer shall also be protected from the overloading characteristics. The characteristics of this protection shall be based on the transformer overloading characteristics.


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c) Complete 115 kV systems shall be protected by the busbar protection with zones segregation.

d) The TSS and SSS receive all the power which is to be transmitted to the MMSP network. For the safe operation of the same, the protection system is to be designed with high degree of reliability. Main protection shall be over current, earth fault. Contractor to device solution based on the combination of concept of direction, logical & grading to achieve high selectivity and reliability of the system protection particularly for ring main.

4.8.13 Protection for 34.5kV Network

The 34.5kV cable network ensures the reliable power supply to the complete MMSP therefore selectivity and fault segregation are very important to ensure the continuous availability of power supply.

The Complete network shall be protected using the pilot wire protection. The network shall also be provided with the directional over current and earth fault protection.

Distribution transformers as well as rectifier transformer with more than 630kVA capacity shall be provided with the transformer differential protection. The TSS and SSS have an environment that is non-air-conditioned and equipment to suit such an environment is to be provided.

Localization of faults shall be ensured either using the logics, communications, or grading. A fault in a section shall generally not lead to the tripping of the breakers not intended to trip.

The protection provided to 34.5kV RMUs shall be includes but not limit the following scope:

a) HV cable to the transformer against overload/short circuits and earth fault;

b) Transformer primary windings against overload/short circuits and earth fault;

c) Transformer secondary windings against short circuits and earth fault;

d) LV cable to the LV changeover panel against short circuits and earth fault;

LV changeover panel ACBs shall be set to protect the HV/LV transformer (provided by E&M Contractor) secondary winding and LV cables from overload.

4.8.14 Protections for 1500V DC System

1. Main Line

In order to isolate the DC system from the other system in vicinity and the leakage protections to work as per requirements, the complete DC system shall be insulated from floor using the insulation mat. The Contractor to upgrade the scheme as per best international practices and shall provide.

A provision shall be made to earth the running rail i.e. negative bus, in case of rail potential being higher than limits prescribed in relevant standard (EN 50122 or equivalent) in order to ensure safety of personnel. This will be achieved by providing Short Circuiting Device (SCD) sometimes referred to overvoltage protection devices (OVPD) at stations close to platform. At least one short circuiting device shall be provided at each station. In case the station has a TSS, the device shall be provided in the TSS. Whereas in case, the station does not have a TSS, the device shall be provided inside SSS.

Provisions shall be made for continuous monitoring of the stray current as per EN-50122 at multiple locations through SCADA system. Contractor shall provide necessary arrangements at TSS for monitoring and recording of potential with respect to reference electrodes. The system will be based on track voltage, track resistance, conductance of the track with or without influence of other structures with provision of Amp/hr, Amp/min and Amp/sec. and facilities for logging of any increment. Design of the monitoring arrangement shall be agreed by


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the Engineer. Monitoring points at the substation shall be interfaced with the SCADA system for remote monitoring and/or action at the Control Room. The Contractor will carry out regular stray current monitoring and analysis after the start of revenue service for first 2 years, and comparisons will be made against the first survey reference data (Baseline survey) and analytical results. The Contractor shall also provide portable measurement system and install points of measurements for further detailed investigation or observations in case of abnormal conditions. The provision of event logger at OCC and the concerned networking and other required systems, subsystem complete with backend or operating software shall be in scope of Contractor.

The Contractor shall interface with track work for design and installation of stray current mesh, cross bonds and associated cable connections.

2. Depot

An earthed system shall be used for Depot area.

A separate TSS has been provided for Depot so as to facilitate isolation of Depot traction supply from mainlines in order to prevent the leakage of return currents to Depot area. The mainline tracks and OCS supply shall be isolated from Depot tracks through insulted rail joints and sectioning insulators in order to minimize the stray currents, even during the movement of the trains. Remote operated sectionalizing switches shall be provided to feed power from Depot to mainline and vice versa in case of failure of Depot TSS to rescue the train during the inadvertent stopping of train in dead section.

In areas, where leaky conditions exist (e.g. washing lines, pit wheel lathe etc.), insulated rail joints (IRJ) shall be provided with power diodes to bridge the IRJ to facilitate passage of return current. The non-electrified tracks shall also be provided with the IRJs.

The prescribed limit of highest touch potential in Depot is 25V as per EN50122 and therefore OPVDs shall be provided at suitable locations to earth the rail in case the rail potential exceeds this limit.

4.8.15 Income from Rectifier

The HSCB shall incorporate following minimum protections, however Contractor to design the protection to attain the RAMS values and to protect the system against the over-voltage of running rails and touch voltage exceeding the specified limits.

1. 76: DC over current series Trip relay;

2. 59: Over voltage relay;

3. 50,50N: Instantaneous over current protection;

4. 51,51 N: Time delayed over current protection;

5. 51 R: IDMT relay current not to exceed the thermal limit of diodes;

6. 32: Reverse power relay for internal faults;

7. 49: Rectifier transformer winding temperature Alarm/ Trip relays;

8. 39: Rectifier door open trip relay;

9. 26: Rectifier over temperature relay;

10. 58: Diode failure protection;

11. 98: Rectifier surge fuse failure check relay; and


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12. 64: Enclosure Ground Relaying.

4.8.16 Feeders to OCS

The outgoing supply to the OCS shall incorporate the following minimum protections:

1. 76: DC Over current series trip relay;

2. 27: Under voltage relay;

3. 50, 51: over current protection;

4. di/dt protection: Rate of rise di/dt element;

5. 85: Inter tripping relay;

6. ETS Inter tripping scheme; and

7. 21: Line protection device (Distance protection).

4.8.17 Other Protection

The DC switchgear shall be provided with the following additional protection in order ensure successful operation of the system.

1. 64: Frame leakage protection.

2. Auto re-closing.

Design of protection system to overcome following major problems:

1. Discrimination between track feeder DC breaker and on load train breaker;

2. Problem due to regenerative breaking;

3. Malfunction of under voltage protection;

4. Rectifier operation in single and parallel and the regulation curve of rectifier;

5. Problems due to single end feed conditions;

6. Temporary faults due to transients or birding; and

7. If the excessive currents or touch voltage persists for more than specified time, the protection system shall trip off and isolate the relevant section. The time settings and specified times shall be proposed as a part of protective system design finalized by the Contractor.

To avoid such scenarios, the use of computer simulations to examine current passing under such case and setting the relays accordingly may help. The setting groups more than one may be used in protection with a facility to change from one to another from remote.

4.8.18 Status Supervision

1. The position of each switchgear, e.g. circuit breaker, isolator, earthing switch, transformer tap changer etc., shall be supervised continuously. Every detected change of position shall be immediately displayed in the single-line diagram on the station HMI screen, recorded in the event list, and a hard copy printout shall be produced. Alarms shall be initiated in the case of spontaneous position changes.


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2. The switchgear positions shall be indicated by two auxiliary switches, normally closed (NC) and normally open (NO), which shall give ambivalent signals. An alarm shall be initiated if these position indications are inconsistent or if the time required for operating mechanism to change position exceeds a predefined limit.

3. The SAS shall also monitor the status of sub-station auxiliaries. The status and control of auxiliaries shall be done through separately with IED and with redundancy.

4.8.19 Measurements

1. Analogue inputs for voltage and current measurements shall be connected directly to the voltage transformers (VT) and the current transformers (CT) without intermediate transducers. The values of active power (W), reactive power (VAR), frequency (Hz), and the rms values for voltage (U) and current (I) shall be calculated.

2. The measured values shall be displayed locally on the station HMI and in the control centre. The abnormal values must be discarded. The analogue values shall be updated every 2 seconds.

3. Threshold limit values shall be selectable for alarm indications.

4. Event and alarm handling: Events and alarms are generated either by the switchgear, by the control IEDs, or by the station level unit. They shall be recorded in an event list in the station HMI. Alarms shall be recorded chronologically with time in a separate alarm list and appear on the screen. It shall be possible to store all events in the computer for at least one month. All, or a freely selectable group of events and alarms shall also be printed out on an event printer. The alarms and events shall be time-tagged with a time resolution of 1 ms. Event list shall contain:

i. Position changes of circuit breakers, isolators and earthing devices

ii. Indication of protective relay operations

iii. Fault signals from the switchgear

iv. Indication when analogue measured values exceed upper and lower limits. Suitable provision shall be made in the system to define two level of alarm on either side of the value or which shall be user defined for each measured

v. Loss of communication

vi. Filters for selection of a certain type or group of events shall be available. The filters shall be designed to enable viewing of events grouped per:

• Date and time;

• Bay;

• Device;

• Function e.g. trips, protection operations etc.;

• Alarm class; and

• Alarm list.


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vii. Faults and errors occurring in the Sub-Station shall be listed in an alarm list and shall be immediately transmitted to the control centre. Each alarm shall be audible and shall be reported on one line that contains: the date and time of the alarm, the name of the alarming object, descriptive text, acknowledgment state.

CABLES

4.9.1 General

All cables shall be sized to carry the continuous current required by the specification and shall be based on the Contractor’s calculations.

The cables shall be able to withstand the short circuit currents inherent in the Contractor’s design. The cables installed shall be non-fire propagating type (FRLS). The Contractor shall submit full technical details of all cables the cables shall be meggered (Insulation tested) to record the (Insulation Resistance) IR value before unloading from the drum, after laying and before connection to the switchgear.

The ratings applied to any cable shall be determined by the most onerous installation condition in any cable route.

All cables and cable and support facilities to be installed in the substations shall be low smoke non-halogen compound (LSZH) type and fire retardant.

Cable sheath shall bear the manufacturer’s name, conductor size, type of insulation, voltage rating and year of manufacture.

4.9.2 Voltage Cable Ratings

The ratings and size of power cables used for power supply system shall be determined by the calculation in accordance with IEC60287 & IEC 60522 or equivalent. The cable shall have marking of the cross-section, conductor at every 10 meters.

The maximum temperatures admissible for the conductor are as follow:

Continuous service under degraded mode - 90°C;

Overload condition - 105°C; and

Short Circuit condition - 250°C.

4.9.3 Cable for 115kV and 34.5kV System

Cables shall comply with IEC 60840 or equivalent.

Cables for 34.5 kV distribution shall have cross-linked polyethylene (XLPE) insulation, single core and stranded copper or aluminium conductor in trefoil formation sized to suit the power supply system design and to satisfy short circuit current requirements.

The Contractor shall coordinate with the Local Electricity Authority MERALCO with regard to cable routing and conduits for cables for 115kV and 34.5 kV feeders between the MERALCO substations and the traction substations.

34.5 kV Cables are required to be used generally for the following connections:

From the Power Transformer Secondaries to the 34.5kV Switchgear in the BSS.


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From the 34.5kV Switchgear to the 34.5kV / 400V Station Transformers and to the traction transformers in TSS.

The 34.5kV Cables shall conform to IEC 60502 and shall be of 19/33 kV/ (36). The copper conductor shall conform to IEC 60228. The cables shall be cross-linked polyethylene, with semi-conducting screen over a copper conducting core, and insulating envelope and protective sheath. The cables shall be of dry-insulated, radial-field cable, based on proven technology. The cables shall be FRLS type and protected against (Ultraviolet) UV rays.

All cables shall be non-fire propagating; non-toxic and low smoke producing and conform to IEC 60502-1 or equivalent. Contractor shall verify the capacities and shall install the cables as per actual thermal, climatic and laying conditions.

In High Voltage power transmission, three single core cables are used in place of three core cables. In the single core power transmission, the cables are usually covered with a metallic sheath to prevent ingress of moisture, protect the core from possible mechanical damage and create an earthed shield. Unlike the three core cables, the Single core cable behaves like a transformer. The current carrying conductor of the cable acts as the primary winding and the metallic sheath as the secondary. The field of the current carrying conductor induces a voltage in the metallic sheath-which is to be limited below the value specified in the standards. This in turn leads to the circulating currents in cable. To utilize the full ampacity of the cable, special bonding methods like single point bonding, midpoint bonding and cross bonding may be employed. The earth continuity conductor shall be used throughout route for proper earthing. The IEEE-575 shall be followed for the bonding, sheath voltage calculations and testing of accessories. The bonding and cross bonding requirements shall be calculated for the most onerous laying conditions and to achieve the full ampacity of cable. The scope of work includes Supply, Installation & Commissioning of complete kits with accessories for jointing, cross-bonding, mid-point bonding, single point bonding, termination of cables, cable termination structure and jumping at PSA, its installation. The joints are to be located and secured in a joint box. Provision of required number of sheath voltage limiters (SVL's) and earthing electrodes as necessary and commensurate with soil resistivity and bonding shall be installed.

4.9.4 1500V DC Power Cable

The 1500V DC compact circular stranded copper conductor, XLPE insulated, steel wire armoured (240 mm2 cables) / (400 mm2 cables) and outer sheathed cable of rated voltage grade 6.6 kV (Um) for positive cables and 1.1 kV (Um) for negative / return cables. They shall be installed as feeding cables between the DC switchgear in the Traction Substations (TSS) and the OCS along the line and as return current cables between the running rails and the return current cubicles in the Traction Substations (TSS). Besides, these shall be also used as bonding cables between the rails / tracks. The bunch of cables sized to carry the traction current shall have at least 15% spare cables to avoid cascading failures in case of offloading under fault in any one cable of the bunch or a minimum of one in the bunch.

Cables shall comply with IEC 60502 or equivalent.

Cable for 1500 VDC Shall have XLPE insulation and armoured, single core stranded copper conductor sized to suit the power supply system design and to satisfy short circuit current requirements. The cable shall be fire retardant.

4.9.5 Cable for Low Voltage (LV) Distribution

Cables shall have cross-linked polyethylene (XLPE) insulation, single core and stranded copper conductor in quatrefoil formation sized to suit the power supply system design and to satisfy short circuit current requirements.


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4.9.6 Cable Cross Section Determination

The smallest standard cross-section in the type of cable selected, under the applicable environmental conditions, should satisfy the following criteria:

a) Normal temperature rise

b) Maximum voltage drops:

i. 3% for main distribution lines (between primary and secondary cabinets);

ii. 3% for lighting circuits;

iii. 5% for power circuits; and

iv. 12% for motor circuits during start-up.

c) Overload and short-circuit;

d) Protection against indirect contact;

e) If heavy currents are to be carried, the economic section must also be taken into account;

f) Systematically, for control and monitoring cables, all the links of a section shall include 15% spare conductors with at least one spare conductor per cable; and

g) The minimum cross-section of conductors shall not be less than 1.5mm2.

Contractor shall interface with E&M Contractor to ensure the compliant of the above information given.

4.9.7 Optical Fibre Cable for Inter-Tripping Devices

The Contractor shall be required to provide adequate justification for the choice of cables and provide evidence that the cables are fully rodent proof.

Optical Fibre cables shall be in accordance with ISO/IEC 11801 and or ISO 60793 as appropriate.

Optical Fibre cable shall be installed for interconnection between the interlinked tripping devices located in between each traction substations.

Optical Fibre cable shall consist of four cores, including two spare cores using trunk cable constructed by telecommunication work between stations.

Optical Fibre cable for interlinked tripping device shall be installed into the tunnel side cable troughs by telecommunication work.

Optical Fibre cables used for line differential protection of all 115kV & 34.5kV cable and for interconnection between the linked breaking devices located in traction substations. OFC Fibre may also be used for other inter tripping commands between various TSS as per proposed design of Contractor. OFC shall be laid in conduits or on trays of appropriate size. The patch cords/connecting cods at Line Interface Units and Equipment shall be fully protected against any mechanical damage.

Optical Fibre cables shall be protected by steel wire or Kevlar type armouring for all externally mounted cables, including those running along the tunnels.


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Kelvar type armouring is preferred as there is no chance of interference with other systems and safety problems caused by induced circulating currents in the event of incorrect, damaged or miss-installed single point earthing.

The Contractor shall be required to provide adequate justification for the choice of cables and provide evidence that the cables are fully rodent proof.

4.9.8 Twisted Pair Cable

Twisted pair cable used to interconnect networking components of the SCADA and other equipment shall be Cat 5 or Cat 6 in accordance with ISO/IEC 11801.

4.9.9 Cable Routes and Cable Racks

1. In all substations, all the cables shall be installed in the appropriate containment include but not limited to cable trench and cable racks hung from the ceiling.

2. Supporters shall be installed in the trench and on the racks to support cables to keep adequate distance.

3. The Contractor shall design the appropriate cable route between equipment and provide racks for cabling in the substations. The Contractor shall coordinate with Interfacing Contractors with regard to the openings for cable entrance on the building walls and floors.

4. All openings for cable entrance on the building walls and floors shall be stopped with non-inflammable materials by the Contractor after all cables have been installed, to prevent fire extension.

4.9.10 Installation of Cables

Laying of Cables:

1. Cable risers shall be protected with cable trays and steel conduit pipes.

2. Bending radius of high voltage (HV) and low voltage (LV) cables shall be as per cable manufacturer’s recommendation.

3. Cable trays shall be fixed to the wall or the ceilings, fixing intervals shall be less than 1.5 m.

4. Cables laying with cable trays on the vertical direction shall be bound tightly at the 1.5m intervals.

5. No tension is permitted for splicing of the cables.

6. Openings for cables drawn into cubicles shall be protected properly so that no pest or moisture can enter.

7. Occupancy of cables in the trough shall be not more than 60%.

8. The Contractor shall coordinate with Interfacing Contractors regarding the provision of cable routes and installation, including methods of mounting the cable containment systems to the civil infrastructure.

4.9.11 Drawings for Review

1. The Contractor shall provide the following lists, as a minimum, to the Engineer for review:

The cable list shall include but shall not be limited to the following information for each individual cable:

i) Cable identification number;


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ii) Type of cable;

iii) Rated voltage;

iv) Number of cores;

v) Cable size;

vi) Overall diameter;

vii) Cable termination at each end;

viii) Connection point at each end with equipment identification and terminal numbers;

ix) Cable routing; and

x) Bending radius.

2. The Contractor’s drawing submittals shall include but shall not be limited to the following:

i) Cross section drawings for cabling including following information:

• Mounting position of cables, brackets and troughs;

• Cable route and cabling method between mainline and substation/electrical supply rooms.

ii) Diagrammatic plans for cable route in tunnels, ducts, trenches and Depot.

• All drawings shall include legend for all symbols used in the drawing.

SUPERVISORY CONTROL AND DATA ACQUISITION (SCADA)

4.10.1 Overview

The Contractor shall design, supply, install test and commission a microprocessor based Supervisory Control and Data Acquisition (SCADA) system for smooth operation, monitoring, control and logging of important features of the power supply system and power distribution system of the MMSP Line.

The equipment shall be controlled and monitored comprising traction substations (TSS), electric rooms such station substation (SSS) and (HER).

At the OCC Central workstations are to be provided giving an effective means of display and control.

1. At the OCC three (3) displays showing various equipment states is to be provided.

2. The central computer server shall maintain an historical database of all messages transmitted over the Power SCADA links and the Contractor shall provide a means of accessing that database.

Necessary RTU shall be installed to provide the most economic configuration based upon cost balances between RTU modularity and cabling costs, consistent with the performance requirements of this Specification.

Communications between the equipment in the traction substations, station substations to the OCC central database shall be over a duplicated communications network dedicated to Power SCADA, which shall be provided by the Contractor.


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In the event of a communications failure between a station and the central database, the station traction power SCADA equipment shall continue to function as an autonomous system, maintaining a local database and all Power SCADA facilities.

The Power SCADA system shall incorporate, but shall not be limited to, the following primary facilities:

1. Provide continuous, effective monitoring at OCC;

2. Alert operations and maintenance staff rapidly to equipment malfunctions, especially those likely to cause disruption to operation of the railway;

3. Provide clear, comprehensive displays and printed logs of equipment status to each operator workstation;

4. Provide comprehensive displays and printed logs based upon historical data, with the option of overlaying data from earlier periods;

5. Time-tag all events detected by the Power SCADA system, to 20 milliseconds resolution for selected highspeed inputs, and to present this information in logs as a true system-wide sequence of events;

6. Provide comprehensive periodic records of energy demand and consumption;

7. Provide automatic and manual control of receiving, traction and auxiliary power equipment;

8. Generate routine maintenance schedules automatically, based upon elapsed time and equipment operation times;

9. Provide centralized data storage and software back-up system; and

10. Provide displays for supervising of ITVs installed in BSS, TSS and SSS for the sight overview.

4.10.2 Applicable Design Standards

The power SCADA system shall be compliant with the standard shown below:

1. JIS, Japanese Industrial Standard;

2. ISO, International Organization for Standardization;

3. JEITA, Japan Electronics and Information Technology Industry Association;

4. IEC, International Electro-technical Commission; and

5. IEEE 802.3 series, Standard for Ethernet based LAN system.

4.10.3 Qualifications of Equipment Manufacturer and Providers

All materials and equipment to be provided for the Power SCADA shall be of proven design and shall be provided by a manufacturer who has successfully accomplished similar supervisory control and data acquisition system projects for a period of at least 10 years.

4.10.4 Design Reliability

a) System Availability

The system shall be designed to achieve at least the highest levels of system availability for the following:


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i. The complete Power SCADA system;

ii. The availability figures for Traction Power functionality and the Traction power decision support facilities;

iii. The availability figures for other Power SCADA subsystems viz. Software Development and Training Simulator;

iv. Any equipment manufactured by the Contractor shall have its failure rate determined strictly in accordance with its appropriate operating environment; and

v. Any degraded mode of operation or re-configuration functions provided by the Delivered System shall not be included in the determination of the Delivered System availability.

b) Redundant Design

i. Redundancy shall be incorporated in the design to cater for failures that will have impacts on safety and normal operation of the MMSP operation. However, redundancy shall be incorporated where failure cannot be tolerated even for short periods.

ii. The system shall therefore be designed around small autonomous items of equipment but shall be commensurate with an economical overall solution.

iii. Failure of any node on the network shall not affect the local operation nor prevent communication between any other connected equipment nodes.

c) Electrical Noise

i. All Power SCADA system equipment shall operate in accordance with the design criteria in the very high “electrical noise” environment normally associated with electrified railway systems due to electrical fields created by traction supplies and strong magnetic fields.

ii. Equipment shall be immune to the effects of conducted and radiated electrical interference.

d) Time to Repair

The Power SCADA system shall have an MTTR less than 30 minutes.

This time shall not include the time taken for a technician to arrive at the initial reported failure site.

e) Lightning Protection

i. The Contractor shall ensure that all equipment are fully protected against the effects of mains surges and direct and indirect lightning strikes. Protection shall be applied to incoming mains power supplies and to input and output signal lines to externally located sensors, transducers, actuating equipment, etc. or to any other equipment likely to be affected.

ii. All surge suppression equipment shall be self-contained and self-resetting.

iii. The suppression equipment shall be so selected that the let through voltage specification does not exceed the absolute maximum voltage specified for the particular equipment being protected.


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iv. Signal lines from external sensors at risk from the effects of lightning shall have surge suppressers fitted at both ends of each line and shall be installed and connected in accordance with the manufacturer’s recommendations.

4.10.5 Main Operating Facilities

The Power SCADA system shall include, but shall not be limited to the following facilities:

1. Continuous, effective monitoring and/or control of selected equipment over the entire MMSP Line;

2. Expeditious alerting of operations and maintenance personnel, by means of corresponding audible and visual alarms, of any identified equipment malfunction, especially those likely to cause disruption to the operation of the MMSP Line;

3. Clear, comprehensive displays and printed records of selected equipment status at each workstation;

4. Comprehensive displays and printed records based upon historical data, with the option of overlaying data from earlier periods;

5. Records of energy demand and consumption and other data at MERALCO incoming feeders, each station, traction and depot service substation for checking MERALCO bills, for trend analysis and cost budgeting purposes;

6. Time-tagging of all events detected by the Power SCADA system, to a highspeed resolution for selected highspeed inputs, and presentation of this information in records as a true sequence of events;

7. Monitoring of selected equipment running times and provision of comprehensive records of the overall operating costs and energy efficiency;

8. Facilities for manual control of selected equipment, the Contractor shall provide detail of such facilities for review by the Employer;

9. Facilities for recommending re-configuration of the operation of selected equipment in the event of a failure or alarm occurring, to enable rapid action by the controller;

10. Automatic generation of maintenance requests which are based upon selected equipment running times; and

11. Centralized data storage and software back-up facilities for the complete Power SCADA system.

4.10.6 Control and Monitoring Items of Power Supply System

1. The Power SCADA system shall control and monitor the 115kV, 34.5kV AC, 1500V DC and LV power supplies, which shall include indications of the status of all electrically operated switching devices on the 34.5 kV AC and 1500 VDC systems, DC battery charger equipment, RTU together with alarm and protective devices.

2. The same requirement shall also apply to the main breakers of the main LV switchboards in each electric room.

3. Power SCADA monitoring facilities for power supplies shall include, but shall not limited to:

• Voltage of all 115kV, 34.5 kV, 400V AC and 1500V DC bus bars;

• Current of all 115kV, 34.5kV AC receiving, 400V AC transformer secondary, and 1500 VDC negative line;


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• Status of circuit breakers and disconnecting switches;

• Rectifier current;

• All DC feeder currents;

• Status of all protection equipment; and

• Operation of alarm and protection devices etc.

4.10.7 Event Record

1. The Power SCADA system shall record any events caused by faults, malfunctions, warnings or alarm information generated automatically by the selected equipment.

2. A central recording system shall be provided to record the following events, including but shall not limited to:

i) Change of state of remote terminal unit input parameters;

ii) Events designated as alarms;

iii) Change in the Power SCADA workstation configuration;

iv) Change in the Power SCADA system configuration by operations personnel;

v) Faults;

vi) Control actions;

vii) Text entered by operations personnel;

viii) System generated massages, e.g. equipment malfunction; and

ix) Change to the configuration of the Power SCADA central database.

3. Events shall be given an order of priority to allow events to be classified, sorted and filtered. Subject to the requirements of the operations plan reviewed without objection by the Engineer or his representative, events shall be classified as:

i) Emergency – This type of fault shall require instant attention in order to minimize interruption of the normal operation of the MMSP Line or risk of injury to personnel or passengers and shall be classified as an alarm;

ii) Urgent – This type of fault shall require reasonably prompt, but not instant attention in order to minimize interruption of the normal operation of the MMSP Line and shall be classified as an alarm;

iii) Non-urgent – This type of fault shall be dealt with in a more convenient manner while more urgent events are dealt with first. This type of event shall not directly result in any degradation of the normal operation of the MMSP Line and shall be classified as an alarm only.

4. The event records shall be available as a text table, with each event classified by its priority level and shall be tagged with details of the date and time at which the event occurred. Additionally, the operations personnel identification code shall be recorded for each event that is initiated by the operations


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personnel. Each event shall be displayed and highlighted until acknowledged by the operations personnel.

5. All events shall continue to be displayed until the event has been acknowledged and cancelled in the automatic event log and provided the fault has been satisfactorily rectified in the equipment which generated the event.

4.10.8 Alarms

Audible alarms shall be provided to alert the operations personnel to a problem requiring immediate action or attention. The audible alarms shall be clearly audible against ambient noise level.

There shall be three categories of audible alarms easily distinguishable by separate tones or sounds for events classified as emergency, urgent and nonurgent.

All alarm appearance events shall generate a record in the alarm list. This record shall be recorded in event list. Alarm disappearance events, which generate an alarm procedure, shall also generate a record in the event list. This record shall only be erased by the System Administrator after a predefined period (minimum one year) or number of events (minimum 2,000,000 events) whichever is more.

4.10.9 Response Times

1. The display of each Safety Critical system shall require rapid updates of the workstation displays of the status and event data, together with a rapid response by the Power SCADA system to control inputs. The status of any circuit breaker trip, protecting any Safety Critical equipment, shall also be identified on the workstations and recorded in the event record, within 2 seconds of its occurrence.

2. Updating of displays shall ensure that no displayed data shall be more than 30 seconds.

No event shall take longer to be registered on a display than 5 seconds for urgent alarms and 3 seconds for emergency alarms. The display of non-urgent events shall take no more than 10 seconds after the occurrence.

3. Housekeeping” commands such as changes of the display format or colour scheme philosophy shall be executed by the Power SCADA system within 5 seconds of the completion of the input procedure.

4. The normal operation of all the remote terminal units (RTUs) shall be verified by the Power SCADA system at intervals not exceeding 30 seconds. In the event of any failure or malfunction of a remote terminal unit, a corresponding massage shall be displayed on the appropriate workstations as a Power SCADA system alarm.

5. The Safety Critical systems for this Power SCADA shall include, but shall not be limited

to the following:

• Traction power and high voltage distribution;

• Fire detection in substations;

• Stray current detection; and

• Monitoring system.


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4.10.10 Noise

All Power SCADA system equipment shall operate in accordance with the design criteria in the very high “electrical noise” environment normally associated with MMSP systems due to electrical fields and magnetic fields created by traction supplies Equipment shall be immune to the effects of conducted and radiated electrical interference.

1. All SCADA equipment shall be fully protected against the effects of power supply surges and transients.

2. Equipment shall be immune to the effects of conducted and radiated electrical and magnetic interference.

3. The SCADA equipment shall be fully protected against the effects due to lightning strikes in accordance with the requirements of BS 6651 - "Lightning Protection" or an equivalent internationally recognized standard.

4. All surge suppression equipment shall be self-contained and self-resetting. The suppression equipment shall be selected to ensure that the let-through voltage does not exceed the absolute maximum voltage specified for the particular equipment being protected.

5. Signal cables from external sensors at risk from the effects of lightning shall have surge suppressor fitted at both ends of each cable and shall be installed and connected in accordance with the manufacturer's recommendations.

6. The SCADA system shall have 20% spare capacity (to be confirmed). In addition, the system shall have 20% expandability to incorporate additional functions and facilities, such as additional input/output points, data storage, etc. that may be required for future expansion.

7. Communication: Communication backbone shall be provided by Telecom and however Contractor shall provide FO cable between the RTU/PLC/Gateway & Telecom Equipment Room. Server shall communicate with RTU/PLCs & RSS gateway on IEC 60870-5-104 communication protocol.

4.10.11 Interface Requirement

a) The Power SCADA system shall have the following interfaces to collect the monitoring information and to control the operating. The Contractor shall select the optimal interface from the interface described below.

i) Digital input:

12V, 24 V, 48V, 110 V DC, 200-230 V AC (at least 2 kV isolation)

ii) Analogue input:

0-10V, 0-10 mA, 4-20 mA DC

ⅲ) Pulse input:

12 V, 24 V DC up to 10 pulses/sec. (at least 2 kV isolation)

ⅳ) Digital output:

Non-voltage free contact, 12 V, 24 V, 110 V DC, 230 V AC

ⅴ) Analogue output:


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0-10 V, 4-20 mA DC

ⅵ) Serial link:

RS232C, RS442

ⅶ) Ethernet:

100Base series or more

b) Optical fibre network shall be provided for not only Power SCADA but also other sub packages (telecommunication and signalling etc.).

Interface between Power SCADA and optical fibre network shall be Optical Distribution frame (ODF) including Telecommunications System. The optical fibre cables between ODF and Power SCADA shall be provided by the Contractor. The Contractor shall liaise with and coordinate his Works with Interfacing Parties to ensure the Works fully comply with the design criteria and with the program constraints of this and interfacing contracts.

4.10.12 Backup Operating Facilities

1. Backup Operating Facilities shall be equipped only for open/close operation of all circuit breakers and only for monitoring of all circuit breakers’ statuses, when main operating facilities in OCC are failed.

2. The backup operation facility has a function that can be used as a training facility for power supply and distribution system operation using a sequence simulator by off-line system. As PRI has training facilities. The contractor must consult with the customer whether to use this feature.

4.10.13 Power Supplies

1. The Power SCADA equipment shall be designed to accommodate an electrical supply derived from either a nominal 400V AC 3-phase 60 Hz, or a nominal 230 V AC single phase 60Hz source.

2. The power supply for Power SCADA shall be supplied through UPS. UPS shall be capable of providing the specified performance continuously for a minimum period of four hours.

3. Power supply to RTUs shall be supplied from 110V battery system of control source for substations.

4.10.14 Power SCADA (P SCADA) Requirements

General

The Power SCADA (P-SCADA) equipment in OCC controls and supervises the whole power supply system.

P-SCADA will have redundant system and shall have enough reliability and functions. To realize easy extension in the future, available distance for controlling is 30 km or more, and extension of controlled posts of further 20 or more shall be possible.

The power supply system and the distribution system shall normally be controlled remotely from the SCADA system and monitored at the SCADA system located in the OCC. TCP/IP should be selected as communication protocol. The P-SCADA System in OCC should have back-up power source by UPS.

A study shall be carried out to ensure of the adequacy of the SCADA system hardware and software for guaranteed performance under the most onerous conditions shall be undertaken.

The scope of supply for the P-SCADA system includes but is not limited to the following:


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1. Traction & Auxiliary SCADA systems including Video wall & UPS, RTUs/PLCs at SSSs & TSS to control and Monitor all Power equipment of the Power Supply System, including main low voltage panels receiving the supply of station transformers.

2. Central control facilities (Servers, workstations, LAN equipment’s UPS of appropriate capacity etc.) at the Operational Control Centre (OCC) Depot. Including Video Display Wall & Training Simulator.

3. SCADA equipment at BSS, Station should be integrated with the communication equipment at nearest Tele-equipment room stations and OCC.

4. For protection, interlock and metering of the equipment, protection control unit (PCU) i.e. Digital Protection Control System (DPCS) shall be installed on all switchgear panels. It shall be able to operate the vital components and work as the interface with the remote SCADA system.

5. Communication between OCC SCADA and the RTUs/Gateways at the power installation ends viz, TSSs, SSSs, BSSs and other location, if any, shall be achieved through the transmission network.

6. It shall be possible to monitor and log the various voltages, currents, power factor, maximum demand, power consumption and status of various equipment and provide automated control throughout the system at the OCC through the SCADA system.

7. The SCADA shall also have provision for plugging in a portable control console (laptop) with the RTU. It shall be possible to operate and monitor the status and alarm conditions of all equipment from this local control console.

8. An Emergency Trip System (ETS) shall be provided at each end of the station platforms, Station control rooms, TSS and in Depot. Traction Supply power-off, in case of emergency, shall be achieved through ETS. The status of ETS will be displayed in SCADA. The resetting of ETS shall also be possible from OCC however; the level of authorization required shall be a step higher than that of operator. Traction power Supply to elementary section will be tripped directly through ETS.

9. The Contractor shall define the philosophy and furnish a scheme of protection with fast discrimination and reliable operation based on latest state-of-the-art computerized logic protection scheme. The zones of protection shall overlap providing second and third tier back-up protections.

10. The Contractor shall submit to the Engineer for review detailed fault calculations, relay settings and fault co-ordination curves showing proper protection, discrimination between all upstream and downstream equipment. Pilot wire relaying and inter tripping, shall be provided as per scheme.

11. Anti-Virus Wall: The servers and networks provided for the complete SCADA system shall be completely secured from any malware infections and virus. The security provided for the network shall have high availability, intrusion prevention.

12. Laptops computers based on the latest generation hardware and licensed software shall be provided with all programme utilities required for testing, commissioning, simulating, programming and parameterization of protection and control system.

4.10.15 Power SCADA (P SCADA) Distribution and Operation Control Centre (OCC)

This Specification describes the technical and performance requirements of the Supervisory Control and Data Acquisition (SCADA) system for monitoring and controlling the Traction and auxiliary power equipment located in BSSs, TSS, ESS and SSS in the Main Line and Depot Power Supply system and the OCS for the Manila Metro Subway. In addition, the SCADA system shall monitor Emergency Trip System (ETS), Stray current detection monitoring system. Contractor shall provide a SCADA system which shall be capable of monitoring & Controlling the Traction & Station power equipment located in the BSS (in conjunction with the


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interface with 61850 environments as discussed above), the TSS & SSS (in conjunction with the RTU/PLC with distribution type SCADA concept) in the Main Line & Depot. As a minimum the following functional features are required:

1. The supervision, Control and data acquisition of BSS shall be through the Substation Automation System (SAS) using the 61850 IEDs. The IEDs shall be using the 61850 platform for the protection as well as for Substation automation. The control and monitoring in the rest of the system i.e. BSS, TSS & ASS shall be on RTU/PLC (which shall be installed in the non-air-conditioned environment) based distribution SCADA; However, it shall also be possible to control the equipment using the interface screen of Relay.

2. All materials and equipment to be provided for the Power SCADA shall be of proven design and shall be provided by a manufacturer who has successfully accomplished supervisory control and data acquisition system projects.

3. One OCC to be provided (and BCC as an OPTION for future to be confirmed). Central workstations shall be provided giving an effective means of display and control. Simultaneous control operations from the OCC and BCC shall not be allowed. Main Control shall be available at OCC. It shall be transferred automatically to BCC in case of OCC communication Failure or Both Servers failure. Else, BCC controller shall request OCC controller to transfer control. On BCC controller’s request, OCC controller can transfer control to BCC & vice-versa but with an authorization In Emergency BCC controller can forcefully take over control & vice-versa. It shall generate an audio Alarm at OCC as well as at BCC. Each transfer shall be a recorded event with time stamping.

4. At the OCC, mimic displays showing various equipment status is to be provided. Monitoring of selected equipment running times and provision of comprehensive records of the overall operating costs and energy efficiency shall be available.

5. The central computer server shall maintain an historical database of all messages transmitted over the Power SCADA links and the Contractor shall provide a means of accessing that database.

6. The tripping of critical feeders which hampers the system operations shall be communicated to the designated mobile numbers through SMS. The arrangement shall also permit the SMS of the cumulative energy every morning. This system shall be provided by the Contractor however the monthly charges for the mobile service provider shall be borne by the Employer after DNP.

7. Necessary RTU/PLC shall be installed throughout the network for process bus related to BSS, SSS, TSS & OCS for Main Line and Depot. At TSS & SSS locations, a separate RTU each for traction and auxiliary shall be provided. The RTU/PLC shall be fully tropicalized to withstand the temperature, humidity and dust conditions. The housing shall be made of non-corrosive material with high immunity against electrical disturbances.

8. Communications between the equipment in the Bulk Supply Substation, traction Substations, and Station Substation shall be over a communications network dedicated to Power SCADA.

9. Provide clear, comprehensive displays and printed logs of equipment status, based upon historical data, with the option of overlaying data from earlier periods; to each operator workstation.

10. Time-tag all events detected by the Power SCADA system, to 20 milliseconds resolution for selected highspeed inputs, and to present this information in logs as a true system-wide sequence of events.

11. Provide automatic and manual control of BSS, traction and station power equipment.

12. Provide centralized data storage and software back-up system.


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13. Continuous, effective monitoring and/or control of selected equipment over the entire MMSP Line.

14. Expeditious alerting of operations and maintenance personnel, by mean of corresponding audible and visual alarms, of any identified equipment malfunction, especially those likely to cause disruption to the operation of the MMSP Line;

15. Monitoring of Emergency Trip System (ETS).

16. Stray current detection System and monitoring system.

17. Records of energy demand and consumption and other data for 115kV infeed voltage & 34.5kV incoming feeders, at each BSS, TSS & ASS Substation for checking bills, for trend analysis and cost budgeting purposes; The energy meter installed in the system shall communicate to the system for this.

18. Implement necessary interlock logics to prevent inadvertent wrong operations. All hard-wired interlocks as per interlocking scheme for safety shall also be provided in soft. The operator shall get indication while selecting the equipment for operation about the interlock / blocked. The interlocks, which are not possible through hard wiring, shall also be identified and provided in soft.

19. Define subroutines for quick isolation of faulty equipment & restoration of power supply.

20. Facilities for recommending re-configuration of the operation of selected equipment in the event of a failure or alarm occurring, to enable rapid action by the controller.

21. Control and Monitoring Items of Power Supply System shall be as following but not limited to:

a) The Power SCADA system shall control and monitor the HV, DC and LV power supplies, which shall include indications of the status of all electrically operated switching devices on the infeed 115kV AC, 34.5kV AC, and 1500V DC systems, and protective devices together with alarm.

b) The same requirement shall also apply to the main breakers and tie breakers of the main LV switchboards in each electric room.

c) Power SCADA monitoring facilities for power supplies shall include, but shall not limited to Voltage of all infeed 115kV, 34.5kV, 400V AC and 1500V DC busbars; Voltage of all 110 V DC Battery banks; Current of all infeed 115kV, 34.5 kV, 400V AC and 1500V DC busbars; Status of circuit breakers and disconnecting switches; Rectifier current; Status of all protection equipment; Status including voltage thresholds of OCS and their various elementary sections using colouring schemes; Operation of alarm and tripping of protection devices.

d) A central recording system shall be provided to record the following events, including but shall not limited to:

i. Change of state of remote terminal unit input parameters;

ii. Events designated as alarms;

iii. Change in the Power SCADA workstation configuration;

iv. Change in the Power SCADA system configuration by operations

v. Faults;

vi. Control actions;


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vii. Text entered by operations personnel;

viii. System generated massages, e.g. equipment malfunction;

ix. Change to the configuration of the Power SCADA central database.

e) Events shall be given an order of priority to allow events to be classified, sorted and filtered. Subject to the requirements of the operations plan reviewed without objection, events shall be classified as:

• Emergency – This type of fault shall require instant attention in order to minimize interruption of the normal operation of the MMSP Line or risk of injury to personnel or passengers and shall be classified as an Emergency alarm;

• Urgent – This type of fault shall require reasonably prompt, but not instant attention in order to minimize interruption of the normal operation of the MMSP Line and shall be classified as an urgent alarm;

• Non-urgent – This type of fault shall be dealt with in a more convenient manner while more urgent events are dealt with first. This type of event shall not directly result in any degradation of the normal operation of the MMSP Line and shall be classified as a non-urgent alarm only.

The event records shall be available as a text table, with each event classified by its priority level and shall be tagged with details of the date and time at which the event occurred. Additionally, the operations personnel identification code shall be recorded for each event that is initiated by the operations personnel. Each event shall be displayed and highlighted until acknowledged by the operations personnel. All events shall continue to be displayed until the event has been acknowledged and cancelled in the automatic event log and provided the fault has been satisfactorily rectified in the equipment which generated the event.

4.10.16 SCADA Architecture

The contractor shall build up a detailed Architecture and hardware of OCC, BCC and stray current monitoring system shall be able to cater the whole Power Supply System as well as in addition to the scope of work under this contact to cater for future expansions (to be confirmed).

The SCADA system shall comprise, but not limited to the followings:

1. OCC SCADA equipment; 2. BCC SCADA equipment; 3. Field equipment; 4. Servers; 5. Remote Terminal Unit (RTU)/PLC; 6. Video Display Wall; 7. Communication to MARLCO supply, TSS and ASS with OCC and BCC; 8. Control and Monitoring Signals (I/O SCADA List) include but not limited to the following:

i. Interface with MARLCO supplied/TSS&ASS etc. ii. All CBs, Isolators, Disconnectors etc. open/close status, control of all CBs, trouble close, block

status, CBs stuck etc. iii. Open/close status of earthing isolators and control of all motorizing earth isolators, surge

arrestors. iv. Status of OCS system with sectioning v. Local/remote status of each bay vi. Auto/manual of each bay


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vii. Permission to local control of each bay and its status viii. Status of spring condition ix. Status of SF6 gas pressure of all gas compartment x. Trip circuit supervision;

9. Status for all operation of protection devices; 10. Rectifier disturbances; 11. Transformer disturbances; 12. Tap changers; 13. Regenerative braking convertor; 14. Battery and battery chargers; 15. RTU/PLC; 16. UPS; and 17. Diesel generators.

The Contractor shall also detail the designs include but not limited to the following:

1. Substation Automation System; 2. Status Supervision; 3. Measurements; 4. Control Dialogue; 5. User Authority Levels; 6. Reports; 7. Historical Reports of Selected Analogue Values; and 8. Any others not specified here.

DOCUMENTS REQUIRED FROM CONTRACTOR

4.11.1 General

To be read in conjunction with General the Specification. The documentation to be delivered by the Contractor, shall include, but not be limited to, the following items:

1. Design Stage

a) Description of general design philosophy;

b) System simulation reports based on simulation study and EMI/EMC effects;

c) System reliability, availability, maintainability and safety evaluation reports;

d) The relevant international standard proposed to be used shall be submitted for review of Employer;

e) Load low study, fault level calculations and short-circuit current curves; and MERALCO Distribution Impact Study;

f) Harmonic study;

g) EMC / EMI study;

h) Determination of equipment ratings;

j) Protection system design for AC & DC system;

k) Interlocking design for safe operation;


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l) Detailed Earthing & Bonding design, earthing and touch potential calculations;

m) Stray current mitigation measures and implementation interface and stray current monitoring system design;

n) Input output list for digital input, output and analogue signals for SCADA;

o) Determination of space requirement;

p) Design and proving protection system and its calculations;

q) Lightning protection measures;

r) Latest type test reports for equipment selected;

s) Detailed design drawings and reports;

t) Detailed SCADA design including the RAM, CPU design. The document must substantiate about how the SCADA system shall manage breakdowns and future metro extensions.

u) Detailed interface reports and interfacing design drawings; and

v) Others.

2. Construction Stage

a) Construction and Installation Plan;

b) Factory Acceptance Test Plan for equipment, components and its integration;

c) Quality Plans;

d) Installation, operation and maintenance instruction of all equipment;

e) Operation and Maintenance Manuals;

f) Records and drawings of equipment installed;

g) All other records of construction, including hidden parts;

h) Site test report of equipment;

i) Electrical Sectioning of 1500V DC OCS;

j) As built drawings including interface drawings; and

k) Electrical isolation drawings for station structures and outside structures like ROB/FOB & others.

3. Other documentation as required, by the Engineer.

a) Single Line diagram, Schematic connection diagrams,

b) Protection schematics/ connection diagrams


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c) General Arrangement drawings

d) Cable Connection Block diagrams for all systems

e) Earthing & Bonding Diagram,

f) Restricted clearance locations with drawings.

g) Other documents and drawings required by Engineer to substantiate that the design has been carried as per the international practice and as per the RAMS criteria.

4.11.2 Drawings for review

The Contractors bid submission shall describe the proposed system and major equipment with suitable drawings to illustrate the general arrangement, equipment sourcing / conformity with the codes, functional areas, suitability, etc.

All drawings, etc. shall be submitted to the Engineer for review. These shall include but not be limited to:

1. General Traction Power supply diagram;

2. Schematic sectioning Diagrams;

3. GA drawings for all components, sub-assemblies and components;

4. Return current, stray current management and Earthing & Bonding plan: Return current circuit Earthing & bonding plan, EMC/EMI and stray current management plan in interface with Track, Signalling and other systems and Rolling Stock shall be submitted; and

5. Location of SCDs, METs on track side, location of earthing of L.A.s and designated earthing points.

INSTALLATION REQUIREMENTS

4.12.1 General

The Contractor shall comply with all Enactments in executing the Works, at least including all statutory provisions on occupational health and safety.

The Contractor shall coordinate with the Interfacing Parties of this Contract and other contractors in the execution of the works.

The Contractor shall also cooperate with all Relevant Authorities in the execution of the Works.

The installation of all equipment shall be undertaken at all times by suitably trained and competent employees of the Contractor, to the satisfaction of the Engineer.

Only appropriate tools, plant, equipment and vehicles shall be used.

Installation of all equipment shall be in accordance with the coordinated installation plan described in the General Requirements (ERG).

Installation of all equipment shall conform to the best industry practices.

Precautions shall be undertaken to ensure the safety of personnel and equipment for all installation works.

The Contractor shall, prior to starting any installation work, identify any possible hazards and implement measures of eliminating and/or controlling such potential hazards, in line with safe working practices.


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Further details on the Site safety assurance management plan are described in the General Requirements (ERG). The Contractor shall coordinate with the relating Contracts regarding the provision of cable routes and installation, including methods of mounting the cable containment systems to the civil infrastructure.

The Contractor shall coordinate its requirements for grounding and bonding system with interfacing contractors, such as wiring routes and locations of ground rods installation.

The Contractor shall ensure that all areas of work are sufficiently illuminated for the Works to be undertaken and that a safe system of work is employed for all activities.

The Contractor shall operate a robust system for the control of persons entering or working upon the Site. The system shall include as a minimum:

• Register of all employees;

• Personal identification, with photograph;

• Levels of competency;

• Date of expiry;

• Date of issue;

• Signature; and

• Register of all visitors.

The Contractor shall cooperate, at all times, with the Engineer and other contractors to ensure that the Site is protected from unauthorized admission, either will fully or otherwise.

The Contractor shall make do provision for the safe access and egress to the Site of Works for its staff and subcontractors. This access shall be maintained such that it is free of all hazards and is in a safe condition throughout the duration of the Works.

4.12.2 Specific Requirements

The installation work pertaining to this Contract shall at least include the following:

1. Finalization of the Construction and Installation Program;

2. Survey on the Site and review the technical requirements shown in this Specification and the Employer’s Drawings;

3. Production of the calculation sheets and installation drawings for the Site installation;

4. Installation in accordance with the finalized installation drawings;

5. Coordination with Other Contractors;

6. Submission of the installation reports and records; and

7. Production of as built drawings, documents, calculation sheets, and records.

4.12.3 Construction and Installation Plan

The Contractor shall undertake installation work in stages as shown in the detailed installation program. Installation, testing and commissioning of later stages shall not impact revenue operation of earlier stages.


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As a minimum, the detailed Construction and Installation Plan shall at least include all the activities include but not limited to, installation details and methods of all activities equipment and tools to be used for installation, safety issues, supervision, temporary land occupation needed and the vehicles to be used for installation.

4.12.4 Temporary Works

The design of the Temporary Works shall be submitted to the Engineer for review.

All Temporary Works shall be removed on completion of the Section, or as directed by the Engineer. All Temporary Works shall be clearly distinguishable from the Permanent Works.

4.12.5 Quality Management

1. The Contractor shall adopt an appropriate quality management system throughout the entire the Site installation period to ensure that the System performance requirements as specified in this TS are achieved.

2. The Contractor shall provide sufficient number of suitably experienced supervisors and skilled workers to ensure that the progress and quality of the work, both on the Site and in the Contractor’s workshops, are maintained to the satisfaction of the Engineer.

3. Supervisors shall have a minimum of five years’ previous experience in a supervisory capacity on similar projects and all the skilled workers including linesmen, electricians, fitters and craftsmen, shall have a minimum of two years’ previous experience in installation of similar systems.

4. The Contractor’s supervision system shall be responsible not only for the supervision of the Concerned system installation but also for the supervision of the installation of the primary fixing system (civil inserts), the ground mats and systems, etc. that are to be installed by the Contractors. The supervisors shall work on a full-time basis during the entire installation process.

5. The Contractor shall maintain a set of drawings at each project Site which accurately reflect the current status of field changes. The Contractor shall obtain letter of no objection from the Engineer for any such changes. The Contractor shall prepare final drawings showing the as built configuration.

These drawings shall be developed in a logical format to facilitate routine system maintenance and troubleshooting. All drawings and details shall be endorsed by the Contractor.

6. The Engineer reserves the right to undertake, at any time, checks on the proficiency of the Contractor’s staff, licensing and all associated documentation. Should any of the Contractor’s staff be found incompetent or unlicensed he shall be removed from the site until their competency has been established.

INTERFACE REQUIREMENTS

The Contractor shall refer to ERG Appendix VI for all interface requirements.

Contractor also liaise and coordinate with the following Interfacing Parties to ensure the effective and compatible coordination of all aspects of design, installation, testing and commissioning of work.

4.13.1 Internal Interfaces

The various interface issues with the various departments/subsystems covered in the Contractor CP106 like track, signalling, telecommunication, AFC, OCS, PSD etc. which are in scope of the Contractor. The Contractor upon award of contract shall make the necessary internal inter discipline interfaces. Indicative and non-exhaustive items are as following:

1. Local Utility Provider for Incoming Feeder 115kV and 34.5kV;


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2. Bulk Supply Substations (BSSs): Automation Substation System, protection, metering etc.;

3. Each 1500V DC feeder. Interface with conductor terminal of DC switchgear installed in TSSs and Interface with conductor terminal of negative disconnect switchgear installed in TSSs;

4. Location of double IRJ at Depot and dead zone at interface of Main Line and Depot;

5. Stray current collection Mat below track, Track plinth connections;

6. Cable crossing below track;

7. Cable Management System in the tunnels, TSSs and SSSs;

8. Return current in Depot and Main line;

9. Connection between rail and return circuit and bonding cables etc.;

10. Civils / Structures: All substations, equipment layouts and cable management system;

11. Telephone and CCTV requirements for Substations;

12. BTN for telecom for SCADA and Metering Data;

13. Platform screen door earthing;

14. Harmonics and EMC with all systems including study and testing with approved plan;

15. Capacity of Common UPS for OCC;

16. OCC furniture; and

17. Stop the train from entering the dead section following the ETS tripping.

4.13.2 Interface with Government Agencies

The Contractor shall interface with various Government Agencies for successful execution of the work. The interface issues shall include but not limited to following. The Contractor shall interface with all the govt. agencies and get the respective approvals for the same.

1. All permissions and approvals including payment of fees/ restoration charges/penalties/ demurrages;

2. Interface with road agencies for survey works for laying of cables from Local Utility Provider Substation (MERALCO) to MMSP Substation;

3. Obtaining all permission from road agency and other agencies for digging along road/pavements as necessary.

4. Restoration of sites, roads as required under the local laws;

5. Interface with Telecom Authorities, Gas Distribution Authorities, power supply, water Authorities and other agencies to ensure that functioning of the utilities is not jeopardized by the actions of the Contractor;

6. Interface with the civic Authorities to obtain water, sewerage connections;

7. Interface including all documentation, coordination and necessary tests for obtaining statuary approval


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and clearance of Electrical Inspector to the Government; and

8. Interface, including all documentation, coordination and necessary tests, for obtaining statutory approval and sanction of Commissioner Metro Rail Safety or equivalent authority to the Government for opening the system for public carriage of passengers.

4.13.3 Joint Testing and Closure Report of Interfaces

The Contractors after satisfactory completion of all work pertaining to the interface shall carry out a joint assessment / testing at the works and furnish a satisfactory Completion report with a "no claim" certificate on any account for the interface works involved. The joint certificate shall be necessary for partial / complete handing over of the work for the trial runs or commissioning and revenue service.

Contractor shall also refer to interface matrix for all interfaces required.

The Contractor shall review the interface design and coordinate with other contractors and third parties as per interface management specified in General Specification (GS). However, detailed interface design within the CP106 package is the responsibility of the Contractor.

4.13.4 Contractor’s Responsibility

1. The Contractor shall ensure that all the interface items as listed in the GS of this specification shall be included in the interface management plan.

2. Other items not mentioned in the interface items but are relevant to the design, installation, testing and commissioning of permanent works, shall also be included in the interface management plan.

4.13.5 Interface Control Sheet

The Contractor shall review the interface design and coordinate with relevant contractor as per interface management section in General Specification. However, detailed interface design within the CP106 package is the responsibility of the Contractor.

TESTING AND COMMISSIONING REQUIREMENTS

4.14.1 General

The Contractor shall develop a full Test Plan which shall be submitted for review by the Engineer. The tests mentioned herein are indicative and shall be the minimum requirement. The Contractor shall clearly categorize the types of tests required in this Part with the followings in the Test Plan:

1. Pre-commissioning tests;

2. Commissioning tests;

3. Trial operation; and

4. Test Certificates.

Specific requirements for the Electrification System (Power Supply, Catenary & Energy Storage System) are given below:

Type Tests as Per the Relevant IEC or Equivalent International Standard.

The Contractor shall conduct the tests in accordance with the reviewed test procedures and shall enter the results in the result sheets. Full use shall be made during the tests of operator manuals and other documentation provided by the Contractor, to provide a series of tests of their accuracy. If during Type Tests, any failure occurs


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or the equipment design is changed, it shall be reported to the Engineer who may, at his discretion, require repetition of the previous tests.

Type tests may not be required in those cases where the Contractor can produce certified evidence that the required type tests have been performed successfully on identical equipment and produced in the factory where the equipment to be supplied under the contract is to be manufactured, provided the type test(s) have been carried out and witnessed by reputed test agencies at certified labs and are not older than 5 years from actual date of supply of equipment. The final decision regarding applicability and acceptance of the type test certificate produced shall rest with Engineer.

The following tests shall be carried out on the equipment in addition to the tests as per the relevant international standards and the quality control and assurance requirements of the Contractor.

General Tests:

Insulation Resistance;

Conductivity Test;

Insulation Withstand Test;

Earth Resistance;

Insulation Resistance;

Conductivity and Contact Resistance;

Leakage Current Test;

Type Tests; and

Routine Tests.

All principal test records and test certificates duly endorsed by the Contractor’s professional engineer are to be submitted for review by Engineer. These test records and certificates shall be supplied for all tests, whether or not the Engineer has witnessed them. The information given on such test certificates shall be sufficient to identify the materials or equipment to which the certificate refers.

Factory Acceptance Tests (FAT)

FAT shall comprise Type Tests, Sample Tests, Routine Tests, Life, Endurance and Destruction Tests, and any additional tests requested by the Engineer.

a) The testing shall be conducted such as to simulate the working conditions as closely as possible.

b) Upon the request of the Engineer, destruction tests shall be carried on components and assemblies to verify the design loading.

c) All the tests shall be conducted both on the assembly and on the members/components of each product in accordance with design specifications and applicable Standards.

4.14.2 Contractor’s Responsibilities for On-Site Testing

The Contractor shall implement all tests in accordance with the Test Plan.


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On completion of erection and prior to commissioning, all installed equipment shall be tested to the acceptance of the Engineer in accordance with an agreed Inspection and test plan to demonstrate that it is entirely suitable for commercial operation.

The Contractor shall be responsible for providing temporary electricity supply, all instruments, gauges, test equipment, tools, accessories, personnel, services and necessary facilities required for the execution of all tests and inspection. Wherever necessary, the Contractor shall provide two or more sets of testing equipment, tools, and others to expedite testing. All test equipment shall be accompanied with the appropriate calibration certificate by a testing authority of the equipment.

Test equipment, tools, and others necessary for subsequent preventive and corrective maintenance are to be provided to the Engineer as specified herein and shall be available to assist the tests. The use of these test equipment, tools and others shall be reviewed by the Engineer.

The Contractor shall be responsible for surveillance and security of his own scope of equipment and distribution downstream cables or other electrical equipment is energized before it has been tested and before the relevant contractors or sub-contractor’s facilities are ready and secured. The Contractor’s responsibility for surveillance and security of the system shall remain in force for each part of the system until such a time that the Engineer issues the appropriate certificate and the Employer takes over the System.

The Contractor shall submit to the Engineer for review not less than six (6) months before commissioning activities commence his proposed format for the commissioning records. The records shall be appropriately sub-divided to make provision for the various parts of the Permanent Works covered by the Contract.

The format of the records shall cover all mechanical and electrical tests, provide positive identification by serial number for assemblies and sub-assemblies of the Permanent Works and show modifications to Engineer's Drawings and diagrams or "as built" data to be certified by the Employer or the Engineer in the course of installation, testing and setting of the Works. The Contractor shall, during the execution of the Works, prepare such reports and records of manufacture, installation and testing as may be required in order that a license may be issued, or statutory requirements may be met, or approval given. Such reports or records shall be adequate to enable each part of the Permanent Works to be commissioned and to meet the requirements of the licensing authority or any standing statutory regulations, and shall be reviewed by the Employer and the Engineer The Contractor shall obtain reports of each inspection and/or test. Such reports shall show the results of all the inspections and/or tests carried out and shall certify that the work has been inspected and/or tested in accordance with the requirements of the Contract and that the work complies with the requirements of the Contract.

Any analysis of the results required to confirm that the work complies with the requirements of the Contract shall be compiled and reported to the Engineer. A representative of the Contractor who has been allocated the required authority under the relevant quality plans shall sign each report of inspection and/or test.

The required On-site tests shall be but not limited as follows:

1. Power Transformer: Power frequency withstand (at 75% specified value), on load tap changer functioning, painting & external visual inspection, Core Insulation resistance, insulation oil breakdown strength, Auxiliary circuits insulation, Auxiliary circuits operation, Instrumentation & relays calibration, Cooling system.

2. High Voltage Circuit Breakers: Wiring, Function, Interlocking, Painting & external visual inspection, Exchangeability of similar devices, Auxiliary circuits insulation etc.

3. High Voltage Isolators: Wiring, Function, Interlocking, Painting & external visual inspection, Auxiliary circuits insulation etc.

4. Current Transformers: Terminal marking, Visual inspection.


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5. Potential Transformers: Terminal marking, Visual inspection.

6. HSCB & DC isolators: wiring, Function, Interlocking, Mechanical operations at rated, max. & min voltage, Interlocking, Visual inspection etc.

7. All control and protection functions and electrical/mechanical interlocks shall be tested.

8. Primary Injection Tests: Tests on each protective system, to prove the auxiliary circuit connections, the relay fault setting values, the correct metering indications and the stability limits.

9. AC/DC Pressure Tests: Insulation resistance of all circuits, equipment, cables and OCS system.

10. Platform resistance test during laying and after laying of membrane.

4.14.3 Installation Tests

The installation tests shall be carried as follow:

1. An inspection and visual verification of ratings and connections with equipment shall be carried out prior to installation tests.

2. Un-energized equipment shall be inspected for its visual and tested for operation after installation of equipment. Inspections and tests shall include the following:

a) Cleanliness;

b) Workmanship;

c) Confirmation of items conforming to ratings specified;

d) Water and dust proofing;

e) Levelling, mounting and positioning;

f) Joints and connections tightness;

g) Cables – dressing, bending radii, jointing and finish at terminals;

h) Clearances and dimensions in conformity with drawings;

i) Earthing and bonding;

j) Functioning of circuit breakers, load break switches, isolating switches and their interlocks;

k) Protection devices;

l) Phase Sequence Verification;

m) Ground resistance shall be measured individually, and for the subsystem and system;

n) Insulation Resistance;

o) Tests on Current Transformers shall include the following:

i) Insulation resistance;


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ii) Winding resistance;

iii) Polarity of Connections up to equipment terminals;

iv) Ratio and magnetization curve verification; and

v) Burden

3. Test on Voltage Transformers shall include the following:

i) Insulation Resistance;

ii) Polarity of connection up to the equipment terminals;

iii) Winding Resistance; and

iv) Ratio

4. Secondary injection tests shall include the following:

Tests shall be carried out at a minimum of three settings if multiple settings are available. Test results of operation boundaries and operating times shall be recorded.

5. Batteries and Chargers

Discharge tests and charging tests shall be carried out to verify the capacity of the batteries and all functions available on the charger.

Continuous measurements of battery voltages shall be made together with periodic readings of the electrolyte specific gravities and temperatures. No addition of electrolyte is permitted during discharge tests.

The operation of the boost charge facility and the effect of the voltage dropping diodes shall also be demonstrated.

6. Control, Indication and Alarm Functions shall include the following:

Insulation resistance and continuity of all cores of cables shall be identified and tested, and the correct functioning of all control, indication and alarm devices shall be verified.

7. Switchgear

All switchgear, including circuit breakers, load break switches and earthing switches shall be operated to prove that the operating gear, tripping devices, protective gear and mechanical interlocking are satisfactory. SF6 gas leakage test shall be performed where applicable.

Power Transformers

Voltage ratio at all taps, functioning of tap changers and insulation measurements shall be performed. Simulation tests shall be carried out to determine correct operation of Buchholz gas alarm and gas surge relays.

8. Metering Instruments, Protection Equipment and Transducers.


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All current and voltage transformers, metering instruments and transducers shall be calibrated by voltage and current injection to prove their accuracy classes.

Tests on Current Transformers: Insulation resistance, Winding resistance, Polarity of Connections up to equipment terminals, Ratio and magnetization curve verification.

Tests on Voltage Transformers: Voltage ratio, Insulation resistance, Polarity of Connections up to equipment terminals.

Primary and Secondary Injection Tests: Tests shall be carried out at a minimum of three settings if multiple settings are available. Test results of operation boundaries and operating times shall be recorded.

Batteries and Chargers: Discharge tests and charging tests shall be carried out to verify the capacity of the batteries and all functions available of the charger. Continuous measurements of battery voltages shall be made together with periodic readings of the electrolyte specific gravities and temperatures. No addition of electrolyte is permitted during discharge tests. The operation of the boost charge facility and the effect of the voltage dropping diodes shall also be demonstrated.

Control, Indication and Alarm Functions: Insulation resistance and continuity of all cores of cables shall be identified and tested. The correct functioning of all control, indication and alarm devices shall be verified.

4.14.4 Partial Acceptance Tests

The following tests shall form part of on-site and System Acceptance Tests as part testing of the equipment and system:

1. Functional Tests and Interlock Tests shall include the following:

All control and protection functions and electrical/mechanical interlocks shall be tested.

2. Primary Injection Tests shall include the following:

The Contractor shall carry out primary injection tests on each protective system, to prove the auxiliary circuit connections, the relay fault setting values, the correct metering indications and the stability limits.

3. AC/DC Pressure Tests shall include the following:

The insulation resistance of all circuits shall be measured before and after the DC pressure test using a 5kV insulation tester. The minimum phase-to-phase and phase-to-ground insulation resistance shall be 100 mega ohms.

Pressure tests shall be carried out on completed cable lengths of high voltage cables in accordance with JIS C 3005, JEC 3408-2008, JEC 3411-2008 and IEC 60502.

4.14.5 System Acceptance Tests

The Contractor shall perform the System Acceptance Tests according to the System Acceptance Test Plan and test procedures leading to the energization of the Power Supply System.

1. Energization:

The Contractor shall prepare operation safety rules and procedures for the review by the Engineer before energization. The Contractor shall check all to ensure safe energization.


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2. All power equipment shall be subject to inspection by inspectors from the Electrical Inspectorate of the Employer before energization. The Contractor shall ensure all the Employer’s Requirements are met and satisfied.

3. The Contractor shall be responsible for the operation of traction and auxiliary power equipment. Upon request by the Engineer, the Contractor shall be responsible for the disconnection and the subsequent reconnections of the power equipment.

Energization as per safety rules and procedures prepared by Contractor in accordance with the local and international standards shall be done by the Contractor. This may also involve the preclearance from electrical inspector or any other statutory body before charging. This clearance shall be the responsibility of the Contractor. The Contractor shall ensure that all requirements from the Electrical Inspector are met.

SAT shall include but not be limited to:

1. Functional tests of SCADA system;

2. Power Supply tests including but not limited to control & monitoring tests from local as well as remote;

3. Short Circuit Tests on OCS; and


4.14.6 Integrated Testing and Commissioning

1. Integrated Testing and Commissioning refers to those tests undertaken in order to demonstrate that the various components of the systems operate satisfactorily between one another, and meet all specified requirements for design, operability, safety, and integration with other works and systems.

These tests shall be entirely within the requirements of one or more of the project contracts or they shall involve a multiplicity of contract procedure.

The final Integrated Testing and Commissioning shall be conducted after the SCADA system and OCC have become operational.

2. Systems that can be tested without depending on the running of trains, such as SCADA system, the emergency trip system shall have their integration tests scheduled to commence as early as possible. It is preferable that any interface problems associated with these “no train” system tests be identified and resolved prior to the test running.

3. The following is an indicative listing of those Integrated Testing and Commissioning functions that necessarily to be integrated with others to demonstrate that the equipment and controls of the Power Distribution System meet the Contract Specifications and demonstrate a safe-to-operate condition. This listing is not exhaustive and shall be updated by the appropriate contractor, to demonstrate functionality, completeness and safety of the installed works and shall be submitted to the Engineer for his review.

a) SSS, HER, Distribution board space and Generator failure mode test;

b) Remote control and monitoring test through SCADA system at OCC;

c) Emergency trip system tests;

d) Power system functional tests;

e) EMI/EMC tests;


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f) Touch/step potential tests; and

The Contractor shall provide attendance to the Engineer during integrated test in relation to the insulation of train station platforms provided by the other contractors.

h) On-load Tests and Directional Test

Once sufficient load current is established, voltages and currents into protection and metering equipment shall be verified to ensure correct operation of protection relays and accuracy of meter readings at local and remote locations.

4.14.7 Trial Operation

The Contractor shall provide special and general attendance during the Trial Operation period such that the persons who conduct the On-Site Testing and Commissioning are available on the Site to solve any problem arising from the Trial Operation.

4.14.8 Performance Verification

1. The Contractor shall carry out the pre-commissioning and commissioning tests to verify that the performance of the System meets the Employer’s Requirements before the substantial completion of the Works.

2. One of the Performance Tests which shall be conducted by the Contractor in conjunction with relevant Contractors, sub-contractors and other parties is the measurement of EMI levels at locations that have received a Statement of approval by the Employer.

Such measurements shall be conducted prior to Energization of the Traction Power System, and then during Service Trials and commercial operation of the train services to ensure that the EMI levels meet the Employer’s Requirements and are in accordance with the Contractor’s designs reviewed by the Engineer.

3. Should the performance of the System deviate from the Contractor’s design the Contractor

shall rectify the deviation in the shortest possible time.

4. The Contractor shall submit a certified report of the results of these Tests to the Engineer within 14 days from the date when the Engineer confirmed that the Contractor has completed each of the Tests.

4.14.9 Indicative List of Tests

The following is an indicative listing of those Integrated Testing and Commissioning functions that necessarily be integrated with others to demonstrate that the equipment and controls installed therein meet the Contract Specifications and demonstrate a safe-to-operate condition. This listing is not exhaustive and may be updated by the Design & Build Contractor, or by the Engineer's Representative, to demonstrate functionality, completeness and safety of the installed works.

1. Load sharing test between rectifiers during train acceleration;

2. Load measuring test (HSCB);

3. Harmonic measurement (Light load and Heavy load);

4. Bulk Supply Substations, traction Substations and Station Substation failure mode test;

5. Remote control and monitoring test through SCADA system at OCC;


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6. Emergency trip system tests;

7. Power system functional tests;

8. Stray current measurements;

9. EMI/EMC tests;

10. Touch/step potential measurement tests;

11. The Contractor shall provide attendance to the Engineer during integrated test in relation to the insulation of train station platforms provided by the other Contractors;

12. On-load Tests and Directional Tests; and

13. Once sufficient load current is established, voltages and currents into protection and metering equipment shall be verified to ensure correct operation of protection relays and accuracy of meter readings at local and remote locations.

4.14.10 EMI Levels

One of the Performance tests which shall be carried out by the Contractor in conjunction with relevant parties (e.g. Telecommunication and signalling Department) is the measurement of EMI levels at locations to be specified by the Engineer. Such measurements shall be carried out for the Traction Power System, and the EMI levels shall comply with the specified requirements.

4.14.11 The Required On-Site Tests shall be as Followed:

1. Power Transformer: Power frequency withstand (at 75% specified value), On load tap changer functioning, Painting & external visual inspection, Core Insulation resistance, Insulation oil breakdown strength, Auxiliary circuits insulation, Auxiliary circuits operation, Instrumentation & relays calibration, Cooling system

2. High Voltage Circuit Breakers: Wiring, Function, Interlocking, Painting & external visual inspection, Exchangeability of similar devices, Auxiliary circuits insulation

3. High Voltage Isolators: Wiring, Function, Interlocking, Painting & external visual inspection, Auxiliary circuits insulation

4. Current Transformer: Terminal marking, Visual inspection,

5. Potential Transformers: Terminal marking, Visual inspection

6. HSCB & DC isolators: wiring, Function, Interlocking, Mechanical operations at rated, max. & min voltage, Interlocking, Visual inspection

7. All control and protection functions and electrical/mechanical interlocks shall be tested.

8. Primary Injection Tests: Tests on each protective system, to prove the auxiliary circuit connections, the relay fault setting values, the correct metering indications and the stability limits.

9. AC/DC Pressure Tests: Insulation resistance of all circuits, equipment, cables and OCS system.



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RELIABILITY, AVAILABILITY, MAINTAINABILITY, SAFETY (RAMS)

For System Assurance and RAMS refer also to Appendix 21 of Part 2 – Employer’s Requirements, Section VI.

4.15.1 Power Supply System and OCS

The reliability and maintainability processes and procedures shall be planned, integrated and developed in conjunction with the operating environment, and the design, development and production functions to permit the most effective and economic achievements of the systems and equipment design objective.

4.15.2 Maintainability

This criterion represents the mean time for repairing (MTTR) and has to be considered only by replacement of faulty equipment or sub assembly. The MTTR shall not exceed 2 hours not including the dead time to reach the site. Dead time to reach at site shall be less than 12 hrs for Manila based agency and 48 hrs for outside agency. An approach with the use of modular and replaceable equipment shall be incorporated in the design.

4.15.3 Availability

Availability shall calculate to achieve the highest level.

Contractor shall provide built-in diagnostics and remote monitoring functions for each microprocessor-based equipment and module of the systems such that the performance requirements can be demonstrated.

4.15.4 Safety and Reliability

The systems shall meet or exceed the requirements for safety and reliability. The installation design shall incorporate measures to avoid presenting safety hazards to people and shall also Incorporate measures to provide for Its safe management and operation.

The Systems shall not give rise, or be subjected to, dangerous interactions within the MMSP or with other systems. The design shall also consider potential interfaces with Road System. The installation shall meet the fire safety requirements generally as per NFPA 130 or equivalent. The design of the earthing system shall conform to IEEE-80/2000, and EN 50122.

4.15.5 Safety Target

The Contractor shall show that the Systems can be maintained safely. The Contractor shall prepare a Quantified Risk Assessment (QRA) to model the risk to (a) traveling public and (b) maintenance and operations staff. The QRA may be based on a comparison of System features and operating practices with other metro systems for which risk levels are known. The QRA shall address the risk of electrocution from the Electrical equipment including OCS and other equipment as well as EMI effects of traction. For maintenance personnel key elements of the QRA shall include as a minimum an assessment of the risk of being struck by a train while working line-side, of falls during maintenance, of electrocution. Accidental charging of dead section posing safety hazard shall also be addressed.

4.15.6 Safety Requirements

The systems shall meet or exceed the requirements for safety as specified in International Standards for MRT Metro systems.

a) The Systems design shall incorporate measures to provide for its safe management and operation.

b) The Systems shall not give rise, or be subject to, dangerous interactions within the Metro or with other systems.

c) The design of the Systems shall consider the safety and reliability of interface to the adjoining transit systems including Road System.


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d) The design of the earthing system shall conform to the National standards, IEEE-80 and EN 50122.

e) The installation design shall incorporate measures to avoid safety hazards to people.

f) The installation shall meet the fire safety requirements generally as per NFPA-130.

4.15.7 Risks on Functional Safety

The risks on functional safety System will include, but not be limited to, the following items:

a) Malfunctioning of equipment due to EMI, such as picking up parasitic induced voltage.

b) Explosion or Fire at Electric Room;

c) Equipment safety;

d) Damage to overhead conductors;

e) Damage to overhead current collection system equipment;

f) Damage to electrical cables system;

g) Damage to return conductors or earth conductors;

h) Electrical safety including safety clearance from exposed live conductors; and

i) Safety for passengers, the Engineer's staff and public, including trespassers as far as is reasonably practicable.

The Contractor shall minimize the above-mentioned risks to a level as low as reasonably practicable in the design and construction and operation of the System.

In the case of fault/accident, and to permit evacuation of passengers from stations by bringing the train up to station, the sectioning shall be such that in case of fault, the faulty section can be isolated quickly and the trains in the healthy section on the same track can either be brought to a station or can be taken on the other track through emergency cross-over depending upon the operational requirements. Basic sectioning arrangement for indicative purposes has been depicted ln the tender drawings. Sectioning arrangement is to be modified /upgraded by Contractor to provide better sectioning scheme having increased flexibility with the consent of the Engineer.

4.15.8 Single Point Failure

No single point failure of BSS, TSS, SSS equipment shall lead to prolonged traction power failure to any part of the system. Loss of any single external supply shall not affect full peak time traction power being supplied to any part of the system. As far as reasonably practicable, failures of the overhead line, or support equipment shall not cause loss of traction supply to more than one line, nor to sections of route that do not pass over the section of line where the fault occurred. Provision shall be made, preferably through insulated overlap otherwise section insulators to allow reconfiguration of the traction power supply to feed the overhead line in areas not directly affected by the fault.

Overhead line over each track on Main Lines shall be supported independently, the design of supports of Depot and secondary lines shall be of sufficient robustness so that an impact by a train pantograph shall not cause a failure affecting other running lines. OCS tensioning devices shall be installed with sufficient lubrication to prevent mechanical failure. The traction and station power supply shall interface with the SCADA system to allow control and monitoring remotely from the OCC. The System shall provide diagnostic information to the operator in the event of fault affecting the power supply.


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4.15.9 Interface with SCADA

The traction power supply shall interface with the SCADA system to allow control and monitoring remotely from the OCC. The System shall provide diagnostic information to the Traction power controller in the event of fault affecting the power supply. The Contractor shall define the maintenance and test procedures of various equipment to ensure adequate availability of the power supply and SCADA.

4.15.10 Maintenance Regime

a) The Contractor shall provide documented maintenance regimes to be followed by the Employer upon substantial completion of various components of the work until the end of the DNP.

b) The Contractor shall produce a maintenance regime for the equipment that shall comprise two constituent parts, corrective and routine/preventative maintenance.

c) Routine/preventative maintenance shall be non-intrusive to the day-to-day operation of the train service and be capable of being pre-planned in advance of the work.

d) Permanent Corrective maintenance shall be available during non-revenue hours. Temporary/quick fix maintenance shall be done during the revenue hours.

e) The maintenance regime shall cover all parts and equipment of the system designed, installed and commissioned by the Contractor. The Contractor shall take into account the requirements of the operations and maintenance when determining and proposing its maintenance regime.

4.15.11 Failure Mode Effects, and Criticality Analysis

Contractor to carry out functional analysis of the MMSP Power Systems using Failure Mode, Effects, and Criticality Analysis to determine failure mode, effects of failure and the root causes of failure of equipment.

4.15.12 Safety Testing and Analysis

Design safety testing and analysis shall be performed on the power system equipment to ensure that all safety requirements have been met, and to identify any potential hazards that may exist in accordance with EN 50126 or equivalent Standards.

4.15.13 Safety Interlocking

Interlocks which prevent contact between maintenance staff and the live parts of the traction and distribution system are of critical importance and as a minimum, the Contractor shall provide the following:

1. Means of interlocking cubicle doors when apparatus is energised at dangerous voltages (e.g. rectifier cubicles etc.).

2. Means of interlocking circuit breakers, isolators and earth switches to avoid out of sequence switching.

The interlocks shall either be electrical, mechanical or both.

4.15.14 Safety Integrity Level (SIL)

Contractor shall perform Risk/Process Hazard Analysis (PHA) to identify all the hazards of each process and estimate the risks inherently involved and determine if that risk is tolerable/acceptable. The procedure shall verify that each instrument utilized in the system as well as each instrument’s parts such as sensors, logic solvers and integral components will work safely to achieve the Safety Instrumented Functions (SIF) in compliance with SIL standard IEC 61508. Contractor shall suggest to the Engineer the generally accepted SIL level for HV Power Systems as per standard practice and the Engineer shall reserve the right to accept or reject the proposed SIL level.


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4.15.15 Wire and Cable Identification

a) A wire and cable identification system shall be used to ensure that all wires and cables in the power distribution system are identified with a permanent, accessible and easily understood marking. Colour band coding shall be used throughout the power distribution system to identify different voltage levels and systems.

b) The wire and cable identification system shall be in accordance with the requirements of IEC Standard 60445, both end dependent numbering is required and a functionally based system is preferred.

c) International danger symbols will be used in English language ONLY.

4.15.16 Environmental Compliance

Design to comply with ISO 14000 environmental requirements and for this reason:

1. Synthetic transformer oil is preferred to mineral oil.

2. Sealed batteries are preferred to refillable lead acid type.

3. Oil bunds to be constructed around and oil pit under oil filled transformer transformers for oil containment and protection of the environment against pollution in the event of oil leaks or transformer tank explosions.

4. Acid filled batteries, oil and all other hazardous substances shall be managed, stored, used, and transported in accordance with ISO 14,000 requirements and Philippines Control of Substances Hazardous to Health Regulations (COSHH). These Regulations require employers to control exposure to hazardous substances to prevent ill health.

GENERAL REQUIREMENTS OF MEASURING AND SPECIAL TOOLS

4.16.1 General

General Requirements for measuring and special tools are described in the Employer’s Requirements – General Specifications. This chapter defines Particular Requirements for Power Supply System.

1. The Contractor shall provide measuring and special tools for future commercial operation as follow:

a) The Contractor shall submit the lists of those tools at least six (6) months from the Completion Date of the Works to the Engineer for his review. The list shall include detailed description with references and correlation with the maintenance manuals.

b) The Contractor shall provide the special tools and diagnostics test equipment during installation and testing stages and for operation and maintenance use.

2. The Contractor shall submit item unit price with quantities of each type of special tools and test equipment and those recommended by the Contractor.

4.16.2 General Requirements of Consumable and Spare Parts

General Requirements for consumables and spare parts are described in the Employer’s Requirements – General Specification. This chapter defines Particular Requirements for the Power Supply System.

The Contractor shall provide consumables and spare parts to cover two (2) years for commercial operation.

1. The Contractor shall submit the lists of consumables and spare parts within six (6) months before the Completion Date of the Works to the Engineer for review. The list shall include the detailed description with references and correlation with the maintenance manuals.


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2. The Contractor shall submit unit price with quantities of each type of consumables and spare parts to the Engineer.

3. The Contractor shall separately keep and maintain sufficient stock of his own consumables and spare parts for the Commissioning and Defects spares. In addition, in determining the list of consumables and spare parts for the Commissioning and Defects repairs, the Contractor shall provide calculation to support the proposed types and quantities with the following:

a) Population of the parts in the system;

b) Criticality of the parts in the system;

c) Safety factor; and

d) Workshop repair turnaround time.

4. The Contractor shall submit the list of consumables and spare parts, with the types and quantities of spares the Contractor intends to hold, at least three (3) months before the commencement of the Defects Notification Period to the Engineer.

5. The Contractor shall include details of the stock of the Contractor’s own spares in the Monthly Progress Report. The status of the spares, either in store or under workshop repair, shall also be included.

4.16.3 Training Requirements

The Contractor shall provide comprehensive training to the Engineer's staff to enable all of the systems and equipment supplied, installed or modified as part of the Works to be operated and maintained, in a defined manner safely and efficiently so as to achieve the maximum reliability and economy, and to meet the requirements of the Employer's programme.

The specific objectives of each course, training facilities to be used, the qualification and experience of the training instructors and the assessment criteria shall be developed by the Contractor and submitted to the Engineer for approval.

The training shall be carried out at such locations where the greatest benefit for trainees may be gained. This may be in Manila, abroad, at place of manufacture, assembly or testing, or at such other locations as may be necessary. All the expenditure for training shall be borne by the Contractor. All places of training shall be subject to review by Engineer.

The O&M training plan shall include but not limit to the following:

a) Details of the Contractor's ability to carry out the necessary training;

b) Details of the proposed approach to structuring and providing the courses required;

c) Course details including duration, maximum number of trainees, ratio of trainees to trainers, facilities required or available and prerequisites for attending the course; and

d) Recommendations for additional training or alternative means by which the Engineer's training, objectives may be met.

4.16.4 Training of Operation and Maintenance Staff

1. The Contractor shall be required to submit a Training Management Plan to the Engineer for approval.

2. The content, timing and duration of the training program shall be such that personnel trained by the


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Contractor will be able to operate and maintain the power supply system in the designed manner with maximum reliability and economy. Training objectives in terms of minimum standards to be achieved by each trainee shall be clearly defined by the Contractor for each trainee post, including the Employer’s Staff.

3. The Contractor shall train and qualify the O&M Personnel in compliance with the Training and

Qualification Plan. The training shall be based on classroom courses and on on-the-job training. It shall address every technical aspect of Operation and Maintenance of the System.

4. The training of the O&M Personnel is based on the following two stages:

a. Stage 1 - Train the trainers.

The Contractor shall train trainers designated by the O&M Entity.

b. Stage 2 - Train the trainees.

5. The O&M Entity trainers train the trainees.

6. For each course, the Contractor shall prepare and submit to the Employer the training material for approval. The training material is composed of trainee documentation, a trainer’s manual and a qualification set of tests.

7. The training shall deal with technical topics such as knowledge of the System and operation and maintenance of the system.

8. When the O&M Personnel is trained, the Contractor shall qualify each member of the staff, by organizing theoretical and practical tests. These tests shall especially but not only deal with safety related topics. The qualification is mandatory to execute operational duties on the System.

9. All the training and qualification activity shall be completed before the Take Over.

4.16.5 Maintenance Requirements

Operation and Maintenance Plan

The Contractor shall prepare and submit operation and maintenance plan to the Engineer for review. The maintenance plan shall specify maintenance organization for the preventive maintenance and corrective maintenance for the proposed system.

The maintenance plan shall include but not limited to the following:

1. Maintenance policy and organization;

2. Working description of first line maintenance, second line maintenance, third line maintenance;

3. The cycle of each maintenance works;

4. Annual periodic maintenance plan;

5. Equipment and subsystem related tasks;

6. Operation methods of the tasks;

7. Devices and test equipment for implementation tasks;


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8. Flowcharts or illustrations for failure investigation;

9. Recovery method;

10. Prevention method; and

11. Estimation period and staff volume.

Software Support

The Contractor shall submit software support plan to the Engineer for review. All incompatible modification, bug fix, update, revise, change and version up with the specifications shall not be performed.

In order to continue proper operation, The Contractor shall provide the software modification, bug fix, update, revise, change and version up including database table configuration for all developed and supplied software.

All the modification and revision for the software shall not gave deterioration for system performance and harmful action.

The Contractor shall retain backup copy of developed and supplied software.

The Contractor shall secure proven validity, tested completely and no objection by the Engineer before loading the new version to the systems.

The Contractor shall educate the Employer’s staff before loading new version to the systems.

1. Software obligations

Any software produced and modified for this contract shall be submitted two backup copy before 14 days commencing actual operation prior to the possession of the Employer. The backup copy shall include but not limited to the following:

All source code, all execution code and all database configurations;

The documents related all the software; and

Not only software development tool for the maintenance, but also editor, compiler and linker system.

2. Manuals

The Contractor shall provide operation and maintenance manual. The latest version of manuals shall be supplied before the commencement of training.

These manuals shall be reviewed by the Engineer prior to the supplying.

The updated manuals shall be supplied when operation and maintenance method had been changed by modifying the equipment.

a) Operation manuals

The Contractor shall provide operation manuals regarding the purpose switching procedures, and operation for each equipment, sub systems and systems.

b) Maintenance manuals


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The Contractor shall provide maintenance manuals describing the maintenance, the focal point of failure investigation, mounting equipment, demounting equipment, repair technique and all necessary items for maintenance for each system and its sub system.

The Contractor shall provide sufficient quantities of manuals (hard copy) and electronics manual in the maintenance office.

Language for the manuals shall be English.

PACKING, SHIPPING, STORAGE AND DELIVERY

4.17.1 Packing

The Plant shall be packed to avoid damages such as deformations and rust to equipment cause by vibrations, moisture during shipping, transportation and others.

The contents and application of equipment shall be indicated outside of crates.

4.17.2 Storage

The shipped plant before installation shall be stored at the site or the place appropriate for storage. The plant shall be stored at the place without fear of destruction and theft when retaining it in places other than the Site.

4.17.3 Delivery

Delivery schedule shall take into consideration carrying-in of the Plant directly to the Site without the need for double-handling.

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