electrical works for data centre-01oct10

ELECTRICAL INFRASTRUCTURE:

SCOPE:

This specification covers design, engineering, manufacture, assembly, testing at manufacturer’s works, supply, delivery at site, unloading, handling, proper storage at site, erection, testing and commissioning at site of complete Electrical System and Equipment for the proposed Data Centre / Disaster Recovery Centre to be installed at TNEB as detailed in the specification, complete with all accessories required for efficient and trouble free operations.

The entire electrical power distribution for Data Centre shall provide Dual distribution path so that there is no Single Point of Failure [SPOF] available from the LT panel of Data centre to IT Equipment. So all elements of the electrical systems, including backup system, are typically fully duplicated, and critical servers are connected to both the "A-side" and "B-side" power feeds so as to achieve N+1 Redundancy in the systems. The power distribution is to be designed for a 24 hour/365 day operation and for 100 % uptime.

Automatic change-over switches are suggested for use to ensure instantaneous switchover from one supply (Main from 11KV/433V 500kVA Transformer) to the other (Standby from 380kVA DG) in the event of a power failure and vice-versa when concerned power is restored.

Backup power shall consist of uninterruptible power supplies and diesel generators.

The electrical system shall provide power to other utilities like Precision Air Conditioning System, Comfort Air Conditioning System, Lighting System, Power Distribution Boards, Utility UPS etc.

For IT loads it has been considered 30 nos Serve-racks with dual source of 32A DP each.

All electrical installations shall conform to the relevant Indian Standard Specifications and Indian Electricity Rules. For Safety, OHSAS 18001, ISO14000 related risk and aspect mitigation system should be established especially for electrical and fire safety.

Bidder shall apply its own mind towards implementation of the philosophy of power distribution as exemplified in 1.2 above and propose the supply items accordingly irrespective of the SLD.

An electrical room dedicated to house all electrical components is proposed at the side of the server room (shown in the drawing). It will specifically house Switch Gear, Transient Voltage Surge Suppression system, HV Panel, LV Panel etc.

All the Electrical Equipments shall be integrated with BMS for monitoring, Operation and protection.

Foregoing Sections would provide Technical Specifications of major equipment/systems.

OPERATIONAL LOGIC OF POWER SUPPLY :

The data centre power supply is from two nos 500 KVA Transformers for lighting, power and HVAC loads in addition to IT loads through UPS. The standby power also has 2 numbers of 380 KVA DG Sets for Entire loads which work in parallel fashion with auto synchronising facility. Normally, both the transformers shall remain charged and share load. Failure of supply from either of the loaded transformers will lead to automatic transfer of total load to the next transformer. When there is loss of power from both the transformer sources, one of the DG sets (which was not operative last time) shall start immediately. In the event of failure of the stated DG, the next DG will start if there is still failure of power from both transformers. Upon restoration of any Transformer Power, the changeover from DG power to Main Power will be automatically done by the system by switching off the DG set after a specified period of time. The Intelligent Micro-controller will maintain the logic of such load management and operational sequence.

POWER LOAD CALCULATION FOR DATA CENTRE:

A total of 1000 KVA Raw Power would be provided by TNEB. The total Raw Power requirement for the Server Room Area is 337 KVA. Additional 126 KVA has been catered for certain auxiliary areas like NOC room, BMS Room, UPS Room, Staging Room, Network Room, Media Storage, Manager Room and Meeting Room etc. and for Customer Care Centre a total load of 61 KVA. The balance capacity is proposed for other Floors and lift.

For Proper and uninterrupted working of Data Centre, supply of clean and uninterrupted power is essential. This can be ensured by having the Data Centre Power distribution system with redundancy at three levels, as follows:

Two Incoming HT feeder supply from different substations. Even if one feeder is down, the other one keeps power available.

Emergency Diesel-Generator backup on Mains failure of both the feeders.

For Server Room Area:

Critical Power requirements:

The proposed Data Centre / Disaster Recovery Centre shall have Server room area of 1000 Sq.ft. to accommodate 30 regular racks. All the 30 racks proposed are Regular Racks (RR) and hence the power consumption per rack is assumed as 5KVA. The total critical power required for servicing the servers amounts to,

• No of proposed Regular Rack = 30 nos.• Power required per Regular Rack = 5 KVA• Power to service 30 RR = (30 x 5) = 150 KVA

The Critical Power for “Server Room Area” (A) = 150 KVA

For Network and MUX (B)

• No of proposed Network & Mux Rack = 6 nos.• Power required per Regular Rack = 1 KVA• Power to service 6 Nos. of Network & Mux Rack= (6 x 1) = 6 KVA

The Critical Power for “Network and MUX” (B) = 6 KVA

1) Total Critical Power Requirement (A) + (B) =156 KVA

For Auxiliary Service Area:

• UPS power required for per computer =0.25KW/comp.• No of computers = 20 comp.• Power Required for 20 computers in KW = 5 KW• Power Required for 20 computers in KVA = 6 KVA• Power required for BMS room & Control System Panel = 10 KVA• Total Power required for Auxiliary Area = 16 KVA or 20 KVA

2) Total Power required for Auxiliary Area = 20 KVA

(UPS for Auxiliary Area is proposed with capacity of 50 KVA)

Lighting load Power requirement for Data Centre:

Lighting Load power rating (A) = 0.0025KVA per Sq.ft.

Total area of Data Centre (B) = 3150 Sq.ft.

3) Lighting Load Power requirement (AXB) = 7.875 KVA or 8 KVA

For PAC: (Server Room, Network & MUX Room)

Total PAC capacity requirement (A) = 61 Tons

Power requirement per Ton (B) = 2.35 KW

Total power requirement for PAC in KW ( C )= (A) X (B) = 143.35 KW

Total power requirement for PAC in KVA (D) = ( C )/0.9 = 159.27 KVA

4) Total power requirement for PAC (D) = 160 KVA

For High sensible CFM AC: (for UPS Room)

Total CFM AC capacity requirement (A) = 6 Tons


Total power requirement for CFM AC in KW ( C ) = (A) X (B) = 14.1 KW

Total power requirement for CFM AC in KVA (D) = ( C )/0.9 = 17.625 KVA

5) Total power requirement for CFM AC = 20 KVA

For Comfort AC: (for Auxiliary Area)

Total Comfort AC capacity requirement (A) = 18 Tons


Total power requirement for Comfort AC in KW ( C ) = (A) X (B) = 42.30KW

Total power requirement for Comfort AC in KVA (D) = ( C )/0.9 = 52.875 KVA

6) Total power requirement for Comfort AC = 60 KVA

For raw Power Points:

Total number of 15A power point required for Data Centre = 29 Nos.

Raw power requirement for 29 Nos. of 15A Power point = 104.4 KVA

7) Total power requirement for raw power points = 105 KVA

Total Power requirement for Data Centre (Ground Floor) (1 to 7) = 563 KVA

Power requirement for Customer Care Centre:

Critical Load power requirement:

• UPS power required for per computer = 0.25KW/comp.• No of computers envisaged = 30 comp.

• Power Required for 30 computers in KW = 7.5 KW• Power Required for 30 computers in KVA = 9 KVA• Total Power required for CCC = 9 KVA or 10 KVA

Critical load at Customer Care Centre = 10 KVA

For AC:

Total Comfort AC capacity requirement (A) = 10 Tons


Total power requirement for Comfort AC in KW ( C ) = (A) X (B) = 23.5 KW

Total power requirement for Comfort AC in KVA (D) = ( C )/0.9 = 26.11 KVA

For AC for Customer Care Centre = 30 KVA

For Lighting Load:

Lighting Load power rating (A) = 0.0025KVA per Sq.ft.

Total area of Customer Care Centre (B) = 1000 Sq.ft.

Lighting Load Power requirement (AXB) = 2.5 KVA or 3 KVA

Total power requirement for Lighting Load for CCC = 3 KVA

For Power Points:

Total number of 15A power point required for Customer Care Centre = 5 Nos.

Raw power requirement for 5 Nos. of 15A Power point = 18 KVA

For raw power point = 18 KVA

Total Power requirement for Customer Care Centre: = 61 KVA

Total power requirement for Data Centre and Customer care Centre

= 563 KVA + 61 KVA

= 624 KVA

Maximum power demand in KVA with Diversity factor of 0.8 = 499.2 KVA

= 500 KVA

Description of Electrical Work Schedule & Specifications:

All electrical work including the commissioning of DGs, ACs should be done by an Electrical Contractor possessing a valid Licensee EA/ESA grade issued by Tamil Nadu Electrical Licensing Board. If possesses License issued by any other Government, the same has to be endorsed by Tamil Nadu Electrical Licensing Board.

Electrical Drawing:

MAIN SCHEMATIC DIAGRAM - Single Line Drawing (SLD) showing detailed electrical layout. (ANNEXURE- )

General

Raw Power:

The Data Centre has to feed both EB Power and DG set power with an Auto changeover through Interlocking arrangements.

11 KV power supply from two different sources:

11 KV, power supply from two different sources with 1000KVA Demand will be provided by TNEB.

Raw Power will be obtained at 433V level from the Main Panel at 11KV / 433V Indoor Substation for Power and Lighting.

LT Power from the Main Panel of 11KV / 433V Indoor Substation will be distributed to the following:

1. Incoming to 160KVA UPS - 12. Incoming to 160KVA UPS - 23. Incoming to 50KVA UPS -14. Incoming to 50KVA UPS – 25. Incoming to Server room PAC Power Panel -16. Incoming to Server room PAC Power Panel-27. Incoming to Network & MUX room PAC Power Panel -18. Incoming to Power Distribution Board of CFM AC and Comfort AC Unit. 9. Incoming to Power Distribution Board UPS Room10. Incoming to Lighting Distribution Board at UPS Room11. Incoming to Critical Load UPS Power Panel at Customer Care

Centre.12. Incoming to Power Distribution Board at Customer Care Centre.13. Incoming to Lighting Distribution Board at Customer Care Centre.

From this panel, feeders can be taken to various requirements as under:-

Two Numbers of 380KVA DG sets has been proposed to be installed in the OTS area near the Electrical Panel Data Centre Power Room at Ground Floor with Auto Synchronising panel. Moulded Case Circuit Breakers along with Air Circuit Breakers shall be used in the construction of distribution panels. The final distribution shall be done using Miniature Circuit Breakers. All underground cables are of XLPE sheathed Aluminium cable for the rating above 25 Sq.mm. PVC sheathed Aluminium cable for the rating below 25 Sq.mm.

The Panels shall have MCCBs as components and not FSUs. The panels / switch boards shall have sufficient spares as required to provide for future additions or alterations. From the Main panels, Underground PVC insulated XLPE sheathed cables shall be used to transmit power to the Data Centre / Disaster Recovery Centre building. The cables shall be laid in the permanent constructed trench with precast slab as cover.

The final distribution boards (LDBs and PDBs) which feed the socket outlets, lighting circuits and other requirements are protected by ELMCBs which in turn protect the downstream circuits too.

From the final distribution boards, copper cabling will be laid above false ceiling will be enclosed in MS conduits as a safety measure against spread of fire in case of some accident. MS conduits shall be used incase of concealed wiring.

Detailed Electrical Work Schedule:

11KV / 433 V Indoor Sub Station:

PANELS

RING MAIN GEAR:

11 KV incoming from Two different substation -

11 KV POWER PANEL

11 KV BUS

The 11 KV BUS

11 KV VCB

METERING AND CONTROL SYSTEM

11KV / 433 V TRANSFORMER:

General

The transformer shall be of 500 KVA, 11KV / 433 V, 3Ø, two winding, ONAN, Dyn 11, Oil immersed, Naturally cooled core type, for operation in highly humid tropical climate with range of temperatures varying from 5o C to 50o C , Lightning / Non-lightning areas suitable for outdoor installation with cable termination box with ± 5% off circuit tap changer in steps of 2.5% as per Technical Specification and IS 2026 with all fittings and accessories enclosed . The transformer is fed from HT switchgear. On the LT side, it is connected to LT switchboard through ACB Switchgear.

Transformer Rating and Over loading

(i) Transformers shall be capable of delivering the rated current at a voltage equal to 105 percent of the rated voltage without exceeding the temperature limits.

(ii) Transformer shall operate satisfactorily without injurious heating at rated kVA, at any voltage within ± 10% of the rated voltage of the particular tap.

(iii) Transformers shall be designed for 50 Hz. +3%, - 5%, unless otherwise specified in data sheet.

(iv) Transformers for two or more limits of voltage or frequency or both shall operate satisfactorily at its rated kVA without injurious heating under all the rated conditions of voltage or frequency or both, provided increase in voltage is not accompanied by decrease in frequency.

(v) Transformers shall be suitable for over loading as per IS 6600, unless specified otherwise. Off circuit tap switch, terminal bushings, other auxiliary components / equipment shall be designed for maximum permissible overloading. Short time over loading to the extent of 50% shall be considered for this purpose, for all transformers unless specified otherwise.

Short Circuit withstand capability

i) Transformers shall be capable of withstanding thermal and mechanical stresses during 3 phase, line to line, double line to earth and line to ground dead short circuits at the transformer terminals, for a period specified, without any injury. Temperature of the windings prior to the short circuit to be considered for this shall be that corresponding to the maximum permissible value applicable to the overloading cycle specified.

ii) For this purpose, infinite supply system and solidly earthed systems shall be considered.

Flux Density

i) The maximum flux density in any part of the core and yokes at normal voltage and frequency shall be such that the flux density under over voltage condition shall not exceed the maximum permissible values for the type of laminations used and core construction adopted.

ii) In case of transformers with variable flux, the voltage variation, which would affect flux density at every tap, shall be kept in view while designing the transformer.

iii) Transformers shall be designed to withstand the following over fluxing conditions:

110% of maximum density: Continuous for all transformers corresponding to rated voltage.

Magnetic circuit:

(i) The cores shall be constructed from high grade, low loss, high permeability cold rolled non-ageing grain oriented silicon steel laminations. Thickness of laminations shall be 0.3 mm or less surface insulation of laminations shall be rust resistant and have high inter laminar resistance. Insulation shall withstand annealing temperature as high as 850 deg.C. The insulation shall be resistant to the action of hot cooling medium.

(ii) The insulation structure for the core to bolts and core to clamp plates shall be such as to withstand a voltage of 2000V AC for one minute.

(iii) Wherever the CRGO (Cold-Rolled Grain Oriented silicon steel) sheets are punched or sheared into laminations, laminations shall be annealed in a non-oxidising atmosphere to relieve stresses and restore the original magnetic properties of CRGO sheets. The laminations shall be free of all burrs and sharp projections.

(iv) The design of magnetic circuit shall be such as to avoid static discharges, development of short circuit paths within itself or to the earthed clamping structure and production of flux components at right angles to the plane of the laminations which may cause local heating.

(v) Ducts shall be provided where ever necessary to ensure adequate cooling. The winding structure and major insulation shall not obstruct the free flow of cooling medium through such ducts.

(vi) All steel sections used for supporting the core shall be shot or sand blasted after fabrication.

(vii) The finally assembled core and coil assembly shall be rigidly fixed to the tank to avoid shifting during transport, handling and short circuits. Adequate provision shall be made for lifting the complete core and coil assembly.

(viii) The supporting frame work of the cores shall be so designed as to avoid the presence of pockets which would prevent complete emptying of the tank through the drain valve, or cause trapping of air during filling.

Windings

(i) Transformers shall be suitable for solidly earthed neutral system.

(ii) The coil clamping arrangement and the finished dimensions of any ducts shall be such as to not impede the free circulation of cooling media through the ducts.

(iii) The windings / and connection of transformer shall be braced to withstand shocks, which may occur during transport or due to short circuits, repeated peak loads and other transient conditions during service.

(iv) Windings shall be subjected to a shrinkage treatment before final assembly, so that no further shrinkage occurs during service. Adjustable device shall be provided for taking up any possible shrinkage of coils in service if required.

(vi) The conductors shall be transposed at sufficient intervals in order to minimize eddy currents and equalize the distribution of currents and temperature along the windings.

(i) Coil clamping rings shall be of steel or of a suitable insulating material. Axially laminated material other than bake lite paper shall not be used.

(vii) Completed core and winding assembly shall be dried in full vacuum to eliminate presence of moisture. After drying process, the full assembly shall be impregnated immediately.

(viii) No strip conductor, wound on edge shall have a width exceeding six times its thickness.

(ix) The winding material shall be copper Windings shall not have sharp bends, which might damage insulation and / or produce high dielectric stresses.

(x) Coils shall be supported using dried and high – pressure compressed wedge type insulation spacers at frequent intervals.

(xi) All threaded connections shall be locked. Leads from the winding to the terminal board and bushings shall be rigidly supported to prevent injury during short circuits / vibration.

(xii) Permanent current carrying joints in the windings and leads shall be welded or brazed.

(xiii) Clamping bolts for current carrying parts inside the transformer shall be compatible with liquid under all service conditions.

Tapping:

(i) Tapping as specified shall be provided on the higher voltage winding of each transformer and shall be arranged so as to maintain as far as possible the electromagnetic of the windings.

(ii) The Taps shall be changed by links.

Temperature Measurement

i) Winding temperature shall be monitored with RTD’s. The RTD leads shall be brought out and connected to temperature scanner.

ii) Each scanner shall have potential free Normally Open Contacts for alarm and trip contacts. Temperature setting of each contact shall be independently adjustable at site. A manual reset type maximum temperature indicator shall be provided for each scanner.

iii) All contacts shall be rated to make 0.5 A (min) and break 0.2 A (min) at 110 V AC. All contacts shall be wired to marshalling box.

Internal earthing arrangements

All metal parts of the transformer with the exception of individual core laminations, core bolts and associated individual clamping plates shall be earthed internally.

Tests

All the transformers shall be subjected to the following routine tests and one transformer shall be type tested at the manufacturer’s works. Test procedure as per IS-2026 shall be adopted.

Routine Tests

1. Transformer shall be fully assembled with all fittings and accessories including wheels to ascertain that all the parts fit correctly.

2. Resistance of each winding of each phase at principal tap and at all other taps.

3. Voltage ratio at all taps.4. Checking of voltage vector relationship.5. Impedance voltage at rated frequency and principal tap, lowest and

highest taps.6. Load loss at rated current.7. Zero sequence impedance at principal tap, rated frequency.8. No load loss and no load current at rated frequency and 100%, 110%

of rated voltage on HV side. Test shall be repeated with 415V, 3 Phase supply connected to LV side (if the LV side rated voltage is more than 415V). No Load & Load Losses shall be as per CBIP / IS with tolerance.

9. One minute power frequency withstand voltage test.10. Induced over voltage withstand test.11. Polarity check, ratio check, measurement of secondary winding

resistance, excitation, characteristic curve, insulation resistance of all bushing CTs.

12. Calibration of winding temperature indicators,

The routine test certificate for each transformer in duplicate shall be furnished by the tenderer.

ii) Type test

1. Temperature rise test.

2. The Contractor shall submit Type Test certificates for similar capacity Transformer supplied by him elsewhere for (i) Short time withstands capability Test and (ii) Impulse Voltage withstand Test (iii) Dynamic short circuit withstand test showing no load losses and load losses at 75 degree C. The type test certificates should conform to the technical terms detailed in this specification.

2.0 Additional Requirements:

1. Fluorescent lamps for sufficient illumination shall be provided and for that power supply shall be provided from LT side of Substation

2. DC Fluorescent lamps for emergency lighting shall be provided.

3.0 TECHNICAL PARTICULARS OF 11 / 0.433 kV Transformer

1. Power supply system in which transformer is to be used.

a) Primary side (HV) max. voltage : 12 kV

b) System earthling

- Primary side (HV) : Solidly earthed- Secondary side (LV) : Solidly earthed

2. Max. and min. 3 phase and ground Fault levels

- Primary side (HV) : 350 MVA

3. Direction of power flow : Bi-directional

4. Transformer application : industrial distribution

5. Transformer type

a) indoor / outdoor : outdoor

b) Dry type / oil filled : Oil filled

c) Core type / shell type : Core type

6. Auto wound / Two winding / three : two windingWinding

7. Number of phases : Three

8 Rated frequency : 50Hz

9 Rated no load voltage:

- HV winding : 11kV

- LV winding : 433 V

10 Cooling :

a) Cooling medium : Oilb) Method of cooling : ONAN

11 Rated kVA at no load voltage andPrinciple tap : 500 KVA

12 overloading as per IS 6600 : Required

13 Max. temp. rise at rated KVA andPrinciple tap

a) Top oil by thermometer method : 50 deg COver design ambient temp of 50Deg C

b) Any winding (HV & LV ) by : 55 deg Cresistance method over designambient temp. of 50 deg C

14 Permissible Variations

a) Percentage impedance : 4 .5 % voltage at rated current frequency, principle tap

tap 75 deg C

b) Frequency variation : +3%, -5% of 50 Hz

c) Voltage variation : +/- 12% of rated voltage

15 Tappings

a) Off-Circuit / ON load : Off Circuit

b) Manual / Automatic : Manual, by changinglinks, by isolatingPower

c) No. of Steps : +5%, +2.5%, +0 –2.5% -5%

d) Percentage variation / step : 2.5 %

e) Winding in which tappings are : HVrequired

16 Short circuit withstand capability : Not less then 2 secsof transformer on any tapping for3 phase and line to ground faultsacross LV winding

17 Insulation

a) One minute power frequencywithstand voltage

HV winding : 28 kV RMS

LV winding : 2.5kV RMS

b) 1.2 x 50 micro second impulse withstand voltage levelHV winding : 75 kV Peak

c) Induced over voltage withstand

HV winding kV (RMS) : As per IS 2026 Part IIILV winding kV (RMS) : - do –

18 Windings insulation category

a) HV – uniform / non – uniform : Uniformb) LVL – uniform / non – uniform : Uniform

19 Winding data

a) No. of winding : Two

b) Winding material : Copper

c) Winding connection

- HV winding : Delta- LV winding : Star with neutral brought out

fully insulatedd) Vector groups (HV-LV) : Dyn 11

20 Core laminationsType : CRGOMaterial : Silicon steelThickness, mm : 0.3

21 Diagram required : yes

22 Parallel operation : Suitable for paralleloperation

23. Transformer size & limitation &Construction data :

i. Type of installation : outdoorii. Terminal Details : HT & LT suitable for Bus bar

connectioniii. Fittings and accessories required : Lifting lugs, name plate,

terminal marking plate, bidirectional rollers, earthinglugs, winding temperatureindicator with alarm and Tripcontact

24. Class of Protection : IP23

25. Cable box : Suitable for 3C X 185 sq.mm 11 KV XLPE aluminium cable onprimary side and suitable for 3 runs of 3.5 C X 400 Sq.mm 1100V PVC /XLPE aluminium armoured cable on secondary side

26. Tank : The transformer tank suitable for 500KVA as per the IS standard may be provided.

27. Oil : The insulating Oil in the transformer shall complied with IS 335 of latest issues.

28. Conservator :1) The total volume – 10 % of Total quantity of oil.2) Shall be provided with drain plug and filling hole (30 mm dia with cover).3) Plain oil level indicator on one side of the conservator with minimum oil level marking.

29. Radiator : Heat dissipation by fin type radiator 1.25mm thick.

30. Explosion vent : 1) Explosion vent like swan’s neck is to be fitted at an angle of about 75 Deg. 2) The diaphragm shall be made of hylam sheet of 0.3mm thickness. 3) The pipe dia shall be 70 mm fixed by welding on top of tank.

31. Breather : Dehydrating Silicagel Breather.

32. Painting : Paint should conform to IS of latest issues.

33. Bushings : The bushings (HV/LV) shall be provided suitable for cable termination at cable box and as per IS.

34. Bushing Terminals : HT/LT bimetallic connectors conforming to IS shall be provided.

4.0 OTHER DETAILS:

1. General: The transformer shall be suitable for continuous run and for all type of loads with high efficiency, the transformer shall confirm to IS 2026/1997 IEC 726 & IS 11171 / 1985 reaffirmed in 1991 for dry type transformers as amended up to date. The supplier should give sufficient spacing between various terminals so that it can be properly terminated.

2. RTD’S: RTD’s shall be embedded in transformer winding (both primary and secondary side) and the leads shall be brought out. The bidder shall supply Temperature Scanner to read the winding temperature. The temperature scanner shall have provision for generating “winding temperature high” trip signal to HT switch gear. The temperature scanner shall be mounted in such a way that operator has access to monitor the temperature periodically.

3. Integration with BMS of Data Centre: Transformer monitoring panel shall be integrated with BMS of Data Centre.

LV 433V POWER PANEL:

LV BUS -1

INCOMER ACB -1 FROM TRANSFORMER 1 - 500KVA, 800AINCOMER ACB -1 FROM DG SET 1 - 385 KVA , 800 AOUTGOING MCCB TO CRITICAL LOAD UPS-1 - 160 KVAOUTGOING MCCB TO SERVICE LOAD UPS-1 (50 KVA)OUTGOING MCCB TO SERVER ROOM PAC POWER PANEL-1 (160 KVA)OUTGOING MCCB TO NET & MUX ROOM PAC POWER PANEL-1 OUTGOING MCCB TO CRTICAL LOAD UPS OF CUSTOMER CARE CENTREOUTGOING MCCB TO CFM AC UNIT AT UPS ROOM1 (20KVA)OUTGOING MCCB TO PDB OF DATA CENTREOUTGOING MCCB TO LDB OF DATA CENTRESPARE MCCBSPARE MCCB

LV BUS -2

INCOMER ACB -2 FROM TRANSFORMER 2

INCOMER ACB -2 FROM DG SET 2OUTGOING MCCB TO CRITICAL LOAD UPS-2OUTGOING MCCB TO SERVICE LOAD UPS-2OUTGOING MCCB TO SERVER ROOM PAC POWER PANEL-2OUTGOING MCCB TO NET & MUX ROOM PAC POWER PANEL-2OUTGOING MCCB TO LDB & PDB OF CUSTOMER CARE CENTREOUTGOING MCCB TO CFM AC UNIT AT UPS ROOM2OUTGOING MCCB TO COMFORT AC UNIT AT DATA CENTRE OUTGOING MCCB TO LDB & PDB OF FIRST FLOOR OTHER THAN CCCOUTGOING MCCB TO LDB & PDB OF SECOND FLOOROUTGOING MCCB TO LDB & PDB OF THRID FLOOROUTGOING MCCB TO PDB OF LIFTSPARE OUTGOING MCCB SPARE OUTGOING MCCB

LV BUS BAR:

Supply and erection of 2 Sets, 800 Amps capacity floor mounting panel board (Cubical type) with bus bar chamber made up of 14/16 SWG MS sheet for 3 phase 4 wire system with suitable size of copper flat for phases and neutral, cable chamber, switch chamber and with 2 Nos. 25mm X 6mm tinned copper flat for the earth bus on the rear side of the panel board, necessary interconnections by copper flat of suitable sizes, suitable PVC colour sleeves for interconnecting copper flats/rigid copper wire, earth connections to all switches/bus bar by copper flats of suitable sizes from the earth bus, hylem sheet separation between bus bar and switches.

LT Circuit Breakers (ACB):

The 5Nos. ACB of 800 A, 4P, 50 KA, Mechanical Draw Out type with microprocessor over current and earth fault releases shall be provided for the following:

Incoming from Transformer – 1 Incoming from Transformer – 2 Incoming from DG set – 1 Incoming from DG set – 2 Bus coupler

The incoming ACBs with separate instrument compartment with 1 No.0- 500V Voltmeter with selector switch and 1 No. 0-800A

Ammeter with selector switch, and RYB LED indication lamps with adequate capacity CTs and control fuses with fine wiring; suitable angle iron frame size of 40mm X 40mm X 6mm with powder coated painting over one coat of red primer and with numbering superscription of cables sizes, capacity of switches etc.

i) The ACB which is provided in incomer shall be of 4 Pole, air break and of Mechanical draw out type. All current carrying contacts or the breaker shall be silver plated. The main contacts shall have ample area and contact pressure for carrying the rated current of the circuit breaker. Arc chute shall be provided on each pole and so fitted that it can be easily removed for inspection of the main contacts.

ii) The breaker shall have independent motorised spring charged stored energy mechanism. The operating mechanism shall be trip free and designed to reduce mechanical shocks to a minimum during operation. The operating mechanism shall operate normally even when the circuit breaker is closed on to fault.

iii) All breakers shall be provided with mechanical trip push button, accessible from outside.

iv) All mechanism shall be designed to give trouble free service over extended periods and shall not deteriorate with normal usage, require attention more often than every 1000 operations or once a year whichever is earlier. Each breaker shall be equipped with mechanical ‘ON’ ‘OFF’ indications visible from the front of the panel.

v) ACB shall be provided with earth fault, earth leakage and over current protections.

vi) ACB shall be of 4 pole construction arranged for simultaneous 4 pole manual / Auto closing and opening and for automatic tripping at short circuit and overload.

vii) Operating mechanism shall be quick make, quick break and trip free system.

viii) The ON, OFF & TRIP positions of the ACB shall be clearly indicated so as to be visible to the operator when mounted as in service. Operating handle shall be provided in front of the Kiosk.

ix) ACB shall be capable of withstanding the thermal stresses caused by overloads and short circuits. The maximum tripping time under short circuit shall not exceed 20 milli seconds. Rated breaking capacity (rms) at 433 V is 10kA. Rated making current (peak) is 21kA.

x) ACB terminals shall be shrouded and designed to receive cable lugs for cable sizes relevant to circuit ratings.

xi) ACB shall be integrated with BMS for monitoring and protection.

Technical Specification of ACB:

(i) Type of breakers : Fixed type air breakers(ii) Standards applicable : IS 2516

(iii) (a) Rated service voltage : 433V, 3 Ph. 50 Hz(b) Highest system voltage : 500V, 3 Ph. 50 Hz(iv) Rated current at design : 800 Aambient for breakers

(v) Symmetrical breakingcapacity in kA (RMS)

(a) at 415V, 0.25 PF : 20 kA RMS(b) at 440V, 0.25 PF : 20 kA RMS

(vi) Making capacity kA (peak) : 47 kA peak(vii) Capacitor breaking capacity : Incomer :600A (min.)at 440V

Outgoing : 300 A (min.)(viii) 1 sec. short time rating kA : 20 kA RMS(RMS)

(a) With release in any : 20 kA RMSsetting

(ix) Thermal release setting : 600-120 Aranges (temp.compensated)

(x) (a) Short circuit release : 2-4/3-6kArange

(b) Short circuit release : 0.1 to 0.5 sec. mechanicaltimer setting range timer/static trip release

(xi) Operating mechanism

(a)Fixed trip/trip free : Trip freeb) Spring assisted /spring : Stored energy mechanismCharged stored energy

c) Electrical operation / : BOTHManual operation

xv) Auxiliary contacts

a) Type : Silver plate copper contentsb) Number : 6 NO + 6 NCc) Breaking capacity at : 5A440 V AC

MODULAR CASE CIRCUIT BREAKERS (MCCB):

MCCB ON LV PANEL-I

TO CRITICAL LOAD UPS-1 - 160 KVA TO SERVICE LOAD UPS-1 (50 KVA) TO SERVER ROOM PAC POWER PANEL-1 (160 KVA) TO NET & MUX ROOM PAC POWER PANEL-1 TO CRTICAL LOAD UPS OF CUSTOMER CARE CENTRE TO CFM AC UNIT AT UPS ROOM1 (20KVA) TO PDB OF DATA CENTRE TO LDB OF DATA CENTRE SPARE - 2 Nos.

MCCB ON LV PANEL-II

TO CRITICAL LOAD UPS-2 TO SERVICE LOAD UPS-2

TO SERVER ROOM PAC POWER PANEL-2 TO NET & MUX ROOM PAC POWER PANEL-2 TO LDB & PDB OF CUSTOMER CARE CENTRE TO CFM AC UNIT AT UPS ROOM2 TO COMFORT AC UNIT AT DATA CENTRE TO LDB & PDB OF FIRST FLOOR OTHER THAN CCC TO LDB & PDB OF SECOND FLOOR TO LDB & PDB OF THRID FLOOR TO PDB OF LIFT SPARE – 2 Nos.

i) MCCBs shall be of 4 pole construction arranged for simultaneous 4 pole manual / Auto closing and opening and for automatic tripping at short circuit and overload.

ii) Operating mechanism shall be quick make, quick break and trip free system.

iii) The ON, OFF & TRIP positions of the MCCB shall be clearly indicated so as to be visible to the operator when mounted as in service. Operating handle shall be provided.

iv) MCCBs shall be capable of withstanding the thermal stresses caused by overloads and short circuits. The maximum tripping time under short circuit shall not exceed 20 milli seconds. Rated breaking capacity (rms) at 433 V is 10kA. Rated making current (peak) is 21kA.

v) MCCB terminals shall be shrouded and designed to receive cable lugs for cable sizes relevant to circuit ratings.

vi) MCCB shall be provided with plug-in bases with safety interlocks and draw out assemblies.

vii) MCCB shall be integrated with BMS for monitoring and protection.

1.2 MCCB

(i) Type of MCCB : Fixed type air break

(ii) (a) Rated service voltage : 433V, 3 Ph. 50 Hz

(b) Highest system voltage : 500V, 3 Ph. 50 Hz

(iii) Rated current at design : 63A - 400A ( as per scheme )ambient for breakers

(iv) Thermal release setting : 80% - 150%ranges (temp.compensated)

(v) (a) Short circuit release : as per standard range

(b) Short circuit release : 0.1 to 0.5 sec. mechanicaltimer setting range timer/static trip release

(vi) Operating mechanism

Electrical operation / : BothManual operation

(vii) Auxiliary contacts

a) Type : Silver plate copper contentsb) Number : 2 NO + 2 NCc) Breaking capacity at 440V AC : 5A

MAIN PANEL at Indoor Sub Station:

Supplying, erecting, connecting and commissioning of FLOOR MOUNTED CUBICLE TYPE MAIN PANEL with necessary foundation channels, etc., The cost shall also include unloading, positioning, etc., The Cable entry shall be from bottom of the panel through cable trench. The Board shall be incorporated with the following:-

All MCCBs shall be of Thermal Magnetic Type with adjustable overloads and fixed short circuits

INCOMERS # 01 and # 02

1250 AMPS 4P ACB 50 KA (Ics) with standing Capacity of Electrically draw out type and with Microprocessor based releases (with Over current / Earth fault/ Short circuit / hunt trip coil with under voltage releases ) …02Nos.

DG INCOMER:

2000 AMPS 4P ACB 50 KA (Ics) with standing Capacity of Electrically draw out type and with Microprocessor based releases (with Over current /Earth fault/ Short circuit / shunt trip coil with under voltage releases ) …01No.

BUSCOUPLER

2000 AMPS 4P ACB 50 KA (Ics) with standing Capacity of Electrically draw out type and with Microprocessor based releases (with Over current / Earth fault/ Short circuit / hunt trip coil with under voltage releases ) …01No.

INTERLOCKING ARRANGEMENT :

Electrical and mechanical interlocking arrangement shall be provided between the EB INCOMER # 01, # 02, DG INCOMER and Bus Coupler

OUTGOING :

SECTION 1

630Amps TPN MCCB 50kA (Ics) … 01No.400Amps TPN MCCB 50kA (Ics) … 03Nos.63 Amps TPN MCCB 50kA (Ics) … 01No.

SECTION 2

630Amps TPN MCCB 50kA (Ics) … 01No.400Amps TPN MCCB 50kA (Ics) … 03Nos.63 Amps TPN MCCB 50kA (Ics) … 01No.

BUSBARS : ALUMINUM

RATING : 2000 AMPS

The Phase Bus bar shall be 2R of 150 x 10 mm. and Neutral bar shall be of 1R of 150 x 10 mm.

The Earth bar shall be 2 Runs of 50 x 12mm.

There shall be Two Sets of Metering Compartment for EB Incomer # 01 and # 02 and each shall be incorporated with the following.

i) 3 Nos. Dual Core tape wound CTs of ratio 1250 / 5 A of Class1.0 for measurement and class 5P10for Protection. The CT burdenshall be 15VA.

ii) 1 No. Load Manager with RS 485 Interface with Maximum Demand Controller.

iii) RYB Indicating Lamps of LED Clustered type and Control MCBs shall be provided.

iv) Single phase preventer shall also be provided.

There shall be One Set of Metering Compartment for DG Incomer incorporated with the following.

i) 3 Nos. Dual Core tape wound CTs of ratio 2000 / 5 A of Class1.0 for measurement and class 5P10for Protection. The CT burdenshall be 15VA.

ii) 1 No. Load Manager with RS 485 Interface without Maximum Demand Indication.

iii) RYB Indicating Lamps of LED Clustered type and Control MCBs shall be provided.

01.02.00 SUB POWER PANEL

CABLE ENTRY: TOP

Supplying, erecting, connecting and commissioning of FLOOR MOUNTED CUBICLE TYPE SUP POWER PANEL with necessary foundation channels, etc., The cost shall also including unloading, positioning, etc.,

The Board shall be incorporated with the following:-


INCOMING :

630AMPS 4P MCCB 36 KA(Ics) Withstanding Capacity of Motorized … 02Nos.

INTERLOCKING ARRANGEMENT:

Electrical and mechanical interlocking arrangement shall be provided between the INCOMERS.

OUTGOING:

63 AMPS TPN MCCB 36 KA(Ics) Withstanding Capacity . 08Nos.

125 AMPS TPN MCCB 36 KA(Ics) Withstanding Capacity . 08Nos.

BUSBARS :

ALUMINUMRATING : 630 AMPS

The Phase Bus bar shall be of 1R 75 x 12 mm. and the Neutral bar shall be 1R 75 x 6 mm.

The Earth Bus bar shall be 2 Runs of 50 x 6mm.

There shall be One set of Metering Compartment incorporated with the following:-

i) RYB Indicating Lamps of LED Clustered type and Control MCBs shall be provided.

ii) All outgoing terminals should be monitored through BMS. Voltage, Current, Frequency, Power.

01.03.00 SUB LIGHTING PANEL at Electrical Room, Ground Floor CABLE ENTRY : TOP

Supplying, erecting, connecting and commissioning of FLOOR MOUNTED CUBICLE TYPE SUB LIGHTING PANEL with necessary foundation channels, etc., The cost shall also including unloading, positioning, etc.,



INCOMING : 125AMPS 4P MCCB 36 KA(Ics) Withstanding Capacity of Motorized .02Nos.

OUTGOING: 63AMPS TPN MCCB 36 KA(Ics) Withstanding Capacity . 05Nos.

INTERLOCKING ARRANGEMENT : Electrical and mechanical interlocking arrangement shall be provided between the INCOMERS

BUSBARS : ALUMINUMRATING : 125AMPS

The Phase Bus bar shall be of 1R 32 x 6 mm. and the Neutral bar shall be 1R 25 x 6 mm.


There shall be One set of Metering Compartment incorporated with the following:-

i) 3 Nos Tape wound CTs of ratio 125 /5A and Class 1. 0 for Metering and burden 15 VA.

ii) 1 No. Class 1.0, 96 Sq.mm. Digital Ammeter (0 - 125 )A with inbuilt Selector Switch.

iii) 1 No. Class 1.0, 96 Sq.mm. Digital Voltmeter (0 - 500V) with inbuilt Selector Switch.

iv) RYB Indicating Lamps of LED Clustered type and Control MCBs shall be provided.

01.04.00 OUTGOING UPS PANEL – 1 and 2 for 250KVA UPS CABLE ENTRY : TOP

Supplying, erecting, connecting and commissioning of FLOOR MOUNTED CUBICLE TYPE OUTGOING UPS PANEL – 1 and 2 with necessary foundation channels, etc., The cost shall also including unloading, positioning, etc.,



INCOMING : 630 AMPS TP2N MCCB 25 KA(Ics) Withstanding Capacity .1No.

OUTGOING:63 AMPS TP2N MCCB 25 KA(Ics) Withstanding Capacity .. 06Nos.

125 AMPS TP2N MCCB 25 KA(Ics) Withstanding Capacity .. 01No.

BUSBARS : COPPERRATING : 800 AMPS

The Phase Bus bar shall be of 1R 75 x 12 mm. and the Neutral bar shall be 2R 75 x 12mm.


There shall be One set of Metering Compartment and shall be incorporated with the following:-


ii) 1 No. Class 1.0, 96 Sq.mm. Digital Ammeter (0 - 630)A with inbuilt Selector Switch

iii) 1 No. Class 1.0, 96 Sq.mm. Digital Voltmeter (0 - 500V) with inbuilt Selector Switch


01.05.00 OUTGOING UPS PANEL – 3 for 20KVA UPS CABLE ENTRY : TOP

Supplying, erecting, connecting and commissioning of FLOOR MOUNTED CUBICLE TYPE OUTGOING UPS PANEL - 3 with necessary foundation channels, etc., The cost shall also including unloading, positioning, etc.,


All MCCBs shall be of Thermal Magnetic Type with adjustable overloads and fixed short circuits.

INCOMING : 125 AMPS TP2N MCCB 25 KA(Ics) Withstanding Capacity .2Nos.

OUTGOING:63 AMPS TP2N MCCB 25 KA(Ics) Withstanding Capacity .. 04Nos.

BUSBARS : COPPERRATING : 125 AMPS

The Phase Bus bar shall be of 1R 32 x 6 mm. and the Neutral bar shall be 2R 32 x 6mm.


There shall be Two sets of Metering Compartment and each shall be incorporated with the following:-


ii) 1 No. Class 1.0, 96 Sq.mm. Digital Ammeter (0 - 125)A with inbuilt Selector Switch

iii) 1 No. Class 1.0, 96 Sq.mm. Digital Voltmeter (0 - 500V) with inbuilt Selector Switch


02.00.00 MCB DBs

Supplying, erecting, connecting and commissioning the following MCB DBs with necessary foundation brackets / frame, interconnections and other associated accessories. The cost of providing adaptor box above the DB shall also be included.

02.01.00 LDB 1, 2 & 3 - 8WAY TPN 3 TIER MCB DB

INCOMER : 63 AMPS TPN MCB … 01No.

OUTGOING :63 AMPS DP 100 mA ELCB .. 3 Nos.

6- 10 AMPS SP MCB .. 24 Nos.

02.02.00 PDB 3 - 8WAY TPN 3 TIER MCB DB

INCOMER : 63 AMPS TPN MCB .. 1 No.

OUTGOING :63 AMPS DP 100 mA ELCB .. 3 Nos.

16 - 32AMPS SP MCB .. 24 Nos.

02.03.00 PDB 4, AC PDB 1 and 2 -4WAY TPN 3 TIER MCB DB

INCOMER : 63 AMPS TPN MCB .. 1 No.OUTGOING :63 AMPS DP 100 mA ELCB .. 3 Nos.6 - 32AMPS SP MCB .. 12 Nos.

02.04.00 ELDB 1 and 2 -6WAY SPN MCB DB

INCOMER : 32 AMPS DP MCB . 1 No.OUTGOINGS : 6 - 10AMPS SP MCB .. 4 Nos.

02.05.00 UPSDB-1A, 1B, 2A and 2B - 8 WAY TPN 3 TIER MCB DB

INCOMER : 63 AMPS TP MCB + 125 Amps Neutral Link .. 1 No.OUTGOING :63 AMPS DP MCB .. 3 Nos.16 AMPS SP MCB .. 24 Nos.

02.06.00 UPSDB-1C, 1D, 2C and 2D -12 WAY TPN 3 TIER MCB DB

INCOMER : 63 AMPS TP MCB + 125 Amps Neutral Link .. 1 No.OUTGOING :63 AMPS DP MCB .. 3 Nos.16 - 32AMPS SP MCB .. 36 Nos.

02.07.00 UPSDB- 3A and 3B - 6 WAY TPN 3 TIER MCB DB

INCOMER : 63 AMPS TP MCB + 125 Amps Neutral Link .. 1 No.OUTGOING :63 AMPS DP MCB .. 3 Nos.10 - 16 AMPS SP MCB .. 18 Nos.

02.08.00 VUPSDB - 1 and 2 - 12WAY TPN VERTICAL TYPE MCB DB

INCOMER :125 AMPS TPN MCCB 25 KA(Ics) With standing Capacity . 1 No.OUTGOINGS : 32AMPS TP MCB .. 12 Nos.

03.00.00 MCCB / MCBs

03.01.00 Supplying, erecting, connecting and commissioning 400Amps TPN MCCB of 36kA (Ics) in M S enclosure with necessary cable adaptor boxes, interconnections, foundation brackets, etc., for UPS incoming control for 250KVA.

03.02.00 Supplying, erecting, connecting and commissioning 63Amps TPN MCCB of 36kA (Ics) in M S enclosure with necessary cable adaptor boxes, interconnections, foundation brackets, etc., for UPS incoming control for 20KVA and for 5.5Tr AC control in UPS Room, GF.

03.03.00 Supplying, erecting, connecting and commissioning 125Amps TPN MCCB of 25kA (Ics) in M S enclosure with necessary cable adaptor boxes, interconnections, foundation brackets, etc., for A C controls with 3Nos. Spare.

03.05.00 Supplying, erecting, connecting and commissioning 32Amps DP MCB in M S enclosure with necessary cable adaptor boxes, interconnections, foundation brackets, etc., for Inverter control for 1 and 2..

03.06.00 Supplying, erecting, connecting and commissioning 32Amps DP MCB in Weather proof M S enclosure with necessary cable adaptor boxes, interconnections, foundation brackets, etc., for AC control.

03.07.00 Supplying, erecting, connecting and commissioning 25Amps DP MCB in Weather proof M S enclosure with necessary cable adaptor boxes, interconnections, foundation brackets, etc., for AC control.

04.00.00 CABLES / TERMINATIONS

04.01.00 Supplying, Laying, connecting and commissioning the following 1.1 KV GradeAYFY /AYWY (or)YFY / YWY Underground Armoured cables with necessary clampsscres, etc. in the following methods. The cost of laying of AYFY /YFY/YWYcables 1.1KVgrade on the existing cable trayor in underground trench or on wall on MS angle supports, including fixing of indication tags on following cables. This also includes necessary GI spacers, saddles, screws, etc.,

CABLES LAID IN THE CABLE TRAY / BARE GROUND The COST OF THE CABLE LAID in TRAY/ CLAMPED ALONG WALL / COLUMN along with all necessary accessories shall be included.

NOTE: Supply of Anchor Fasteners and necessary 1.5 mm. thick GI Flat, clamps shall be included in the laying cost.

i) 3 1/2 x 400 Sq.mm. ALU.ii) 3 1/2 x 185 Sq.mm. ALU.iii) 3 1/2 x 50 Sq.mm. ALU.iv) 3 1/2 x 25 Sq.mm. ALU.v) 4 x 16Sq.mm. ALU.vi) 4 x 10Sq.mm. Cu.

04.02.00 Supplying, terminating, connecting and commissioning the above Underground armoured cables with double compression type Cable glands . The cost of earthing earthinggland copper strips/wires shall also be included. The cables shall be terminated with heavy duty Copper / Aluminum lugs after crimping. End termination of the below cable sizes using (i)double compression weather proof glands with hoods at equipments. The termination shall be made with Dowell’s lugs/sockets only.

i) 3 1/2 x 400 Sq.mm. ALU.ii) 3 1/2 x 185 Sq.mm. ALU.iii) 3 1/2 x 50 Sq.mm. ALU.iv) 3 1/2 x 25 Sq.mm. ALU.

v) 4 x 16Sq.mm. ALU.vi) 4 x 10Sq.mm. Cu.

05.00.00 POWER SOCKETS & WIRING ( ALL CONDUITS ABOVE FALSE CEILING SHALL BE PROPERLY FIXED ON RCC CEILING)

05.01.00 Supplying, laying, connecting and commissioning 2Runs of 4 Sq. mm and 1Run of 2.5Sq.mm.PVCInsulated flexible copper cable enclosed in 16 SWG thick MS conduits in ceiling /wall / partitions or laid in open fashion above false ceiling with necessary clamps, screws etc., from DB to Power points.

05.02.00 Supplying, and fixing 5/15 AMPS Switched Socket combined ELECTRIC MAKE in Manufacturer’s MS mounting box fixed flush with the wall/ partitions with necessary accessories as Raw Power.

06.00.00 MAINS WIRING

06.01.00 Supplying, laying, connecting and commissioning 4Runs 240Sq.mm. and2Runs of 50q.mm. PVC insulated copper conductor wires in M S Conduits / metallic flexible hoses with necessary accessories from 400A MCCB to the Incoming of 250KVA UPS.

06.02.00 Supplying, laying, connecting and commissioning 5Runs 240Sq.mm. and2Runs of 70q.mm. PVC insulated copper conductor wires in M S Conduits / metallic flexible hoses with necessary accessories from 250KVA UPS outgoing to Outgoing UPS Panel 1 and 2.

06.03.00 Supplying, laying, connecting and commissioning 4Runs 16Sq.mm. and2Runs of 4Sq.mm. PVC insulated copper conductor wires in M S Conduits / metallic flexible hoses with necessary accessories from 63Amps MCCB to the incoming of 20KVA UPS.

06.04.00 Supplying, laying, connecting and commissioning 5Runs 25Sq.mm. and2Runs of 6q.mm. PVC insulated copper conductor wires in M S Conduits / metallic flexible hoses with necessary accessories from 20KVA UPS outgoing to Outgoing UPS Panel 3.

06.05.00 Supplying, laying, connecting and commissioning 5Runs 10 Sq.mm. and2Runs of 4 Sq.mm. PVC insulated copper conductor wires in M S Conduits with necessary accessories from Outgoing UPS Panel 1,2 and 3 to UPSDBs.

07.00.00 WIRING (ALL CONDUITS ABOVE FALSE CEILING SHALL BE PROPERLY FIXED ON RCC CEILING)

07.01.00 Supplying, wiring, connecting and commissioning the Light Points with 3 Runs of 1.5Sq.mmPVCInsulated multi stranded copper conductor wires enclosed in 16 SWG thick MS Conduits concealed in wall/ ceiling /partitions or laid in open fashion above false ceiling with necessary clamps, screws, etc., including supplying and fixing 5AMPS MK ELECTRIC SWITCH mounting box fixed flush with the wall.

07.01.01 One Light Controlled by one Switch.

07.02.00 Supplying, wiring, connecting & commissioning the light points with 3 Runs of 1.5Sq.mm.PVCinsulated flexible copper conductor wires enclosed in 16SWG Thick MS Conduits concealed in wall/ceiling/ partitions or laid in open fashion above false ceiling with necessary clamps, screws, etc. for additional points. The additional points will have to be wired from the first point mentioned under Item No.07.01.00.The maximum length will be 5.0Mts. for each additional point. 07.03.00 Supplying, wiring, connecting and commissioning the Light Points with 3 Runs of 2.5Sq.mmPVCInsulated multi stranded copper conductor wires enclosed in 16 SWG thick M S Conduits concealed in wall/ ceiling /partitions or laid in open fashion above false ceiling with necessary clamps, screws, etc., light fitting control by 6AMPS SP MCB control including primary and secondary points.

07.04.00 Same as the Item No.07.01.01 but for wall site Exhaust fan with single 5A switch control and other associated accessories. Same as the Item No.07.01.01 but for ceiling fan with step type electronic regulator and other associated accessories.

NOTE:

THE COST OF SUPPLYING, LAYING & PULLING CIRCUIT MAINS WIRING WITH 3Runs of 2.5SQMM. PVC INSULATED COPPER CONDUCTOR WIRES IN M S CONDUITS SHALL BE INCLUDED IN THE POINT RATE. FOR LIGHT,FAN, EXHAUST FAN, ETC.,

08.00.00 EMERGENCY LIGHT PONT WIRING

08.01.00 Supplying, laying, connecting and commissioning 3 Runs of 2.5Sq.mm PVC Insulated multistranded copper conductor wires enclosed in 16 SWG thick MS conduits in ceiling /wall/ partition

sorlaid in open fashion above false ceiling with necessary lamps, screws etc.,

09.00.00 UPS POWER WIRING

09.01.00 Supplying, laying, connecting and commissioning 3core 4 Sq.mm Copper flexible cables in the cable tray with necessary clamps, screws etc., from DB to PowerPoint.

09.02.00 Supplying, and fixing 5/15 AMPS Switched Socket combined of MK ELECTRIC MAKE in Manufacturer’s MS mounting box fixed flush with the wall/ partitions (or) in open fashion with necessary accessories (or) with a M S powder coated clamp to be fixed on the roof but inside the false flooring and with necessary accessories like clamps, screws, etc.,

09.03.00 Supplying, and fixing 5 AMPS Switched Socket combined of MK ELECTRIC MAKE in Manufacturer’s MS mounting box fixed flush with the wall/ partitions with necessary accessories in BMS Room.

09.04.00 Supplying, and fixing 5/15 AMPS SWITCH of MK ELECTRIC MAKE in Manufacturer’s MS mounting box fixed flush with the wall/ partitions with necessary accessories for OHP.

09.05.00 Supplying, and fixing 5/15 AMPS Socket of MK ELECTRIC MAKE in Manufacturer’s MS mounting box fixed flush with the wall/ partitions with necessary accessories for OHP. (AFC AREA) Supplying, erecting, connecting and commissioning 32Amps TPN + E metal clad plug and sockets in M S enclosure with 32Amps 4Pole MCB with necessary foundation arrangements, interconnections, etc. for 3Phase server racks.

09.08.00 Supplying, erecting, connecting and commissioning 3 x 5Amps socket with 1No. 15Amps switch in manufacturer's M S mounting box with necessary Accessories for tables.

09.09.00 Supplying, laying, connecting and commissioning 3Runs of 2.5Sq.mm.PVC insulated multistranded copper conductor wires in M S conduits with necessary accessories for UPS Sockets.

09.10.00 Supplying, laying, connecting and commissioning 2Runs of 4 Sq. mm and 1Run of 2.5Sq.mm.PVCInsulated flexible copper cable enclosed in 16 SWG thick MS conduits in ceiling /wall / partitions or laid in Open fashion above false ceiling with necessary clamps, screws etc., from DB to Power points for UPS Sockets.

10.00.00 EMPTY PVC CONDUITS

10.01.00 Supplying and laying the following PVC Conduits concealed (or) open in wall/ceiling/false ceilinged. with necessary accessories clamps, screws etc. with 1 Run of 16SWG G.I. Fish wire.

10.01.01 25mm DIA PVC CONDUITS10.01.02 32mm DIA PVC CONDUITS

11.00.00 JUNCTION BOXES

11.01.00 Supplying, fabricating, erecting 14SWG thick Junction boxes with cover and other associated accessories. The Junction boxes shall be of powder coated type and fixed flush with the floor / Wall /above false ceiling.

12.00.00 EMPTY M S CONDUIT

12.01.00 Supplying and laying the following M S Conduits concealed (or) open in wall/ceiling/false ceiling etc. with necessary accessories clamps, screws etc. with 1 Run of 16SWG G.I. Fish wire. For Office Area.

12.01.01 25 mm DIA M S CONDUIT

12.01.02 32 mm DIA M S CONDUIT

13.00.00 EARTHING

13.01.00 Supplying, installing and connecting a Copper plate of size 600mm.x 600mm.x 3.15mm. at a depth of2000 mm. in an earth pit of 700 x 700 x 2500 mm. filled with salt and charcoal mixed with sand in alternate layers 150 mm. each upto a height of2000mm. from bottom. The pipe shall have provision for watering through a funnel. It shall also have provision for connecting 25 x 6 mm. Copper Flat on two sides. A masonry structure shall be constructed to a depth of 750mm. and a heavy duty CI Cover shall be used to cover the pit. The cost of digging and back filling shall also be included .Sand, salt and charcoal are in the DCO’s scope.

13.02.00 Supplying, installing and connecting a 2.5 Mtr.long 40 mm. dia G.I. Pipe with holes drilled diametrically opposite to each other once

every 150mm. in an earth pit of 380 x380 x 3000mm.filledwith salt and charcoal mixed with sand in alternate layers 150 mm.each upto a height of 2500mm. from bottom. The pipe shall have provision for watering through a funnel. It shall also have provision for connecting 40 x 6 mm.Copper

Flaton two sides. A masonry strucutre shall be constructed to a depth of750 mm. and a heavy duty CI Cover shall be used to cover the pit. The cost of digging and back filling shall also be included. Sand, salt and charcoal are in the DCO’s scope.

13.03.00 Supplying, laying and connecting 2R x 1c 120Sq.mm. PVC Insulated copper conductor with earth link with SMC/DMC wires in open or concealed fashion enclosed in PVC Conduits with necessary clamps, screws, interlinks etc. for UPS from the UPS Earth electrode to Busbar near UPS.

13.04.00 Supplying, laying and connecting 1R x 1c 120Sq.mm. PVC Insulated copper conductor with earth link with SMC/DMC wires in open or concealed fashion enclosed in PVC Conduits with necessary clamps, screws, interlinks etc. for UPS from the Busbar to the UPS.

13.05.00 Supplying, laying and connecting 2R x 1c 25 Sq.mm. PVC Insulated copper conductor with earth link with SMC/DMC wires in open or concealed fashion enclosed in PVC Conduits with necessary clamps, screws, interlinks etc. for UPS from the UPS Earth electrode to Busbar near UPS Supplying, laying and connecting 1R x 1c 25 Sq.mm. PVC Insulated copper conductor with earth link with SMC/DMC wires in open or concealed fashion enclosed in PVC Conduits with necessary clamps, screws, interlinks etc. for UPS from the Busbar to the UPS.

13.07.00 Supplying, laying and connecting 1R x 1c 25 Sq.mm. PVC Insulated copper conductor with earth link with SMC/DMC wiresinopen or concealed fashion enclosed in PVC Conduits with necessary clamps, screws, interlinks etc. for EPABX.

13.08.00 Supplying, laying and connecting 1R x 1c 50 Sq.mm. PVC Insulated copper conductor with earth link with SMC/DMC wiresinopen or concealed fashion enclosed in PVC Conduits with necessary clamps, screws, interlinks etc. for server rack from Earth electrode to busbar at server room.

13.09.00 Supplying, laying and connecting 1R x 1c 10 Sq.mm. PVC Insulated copper conductor with earth link with SMC/DMC wiresinopen or concealed fashion enclosed in PVC Conduits with necessary clamps, screws, interlinks etc. for server rack from Busbar to server rack.

13.10.00 Supplying, laying and connecting 40 x 6 mm. copper Flat laid in open fashion with necessary clamps, screws, interlinks etc., for neutral of DG 13.11.00 Supplying, laying and connecting 50 x 6 mm. GI Flat laid in open fashion with necessary clamps, screws, interlinks etc., for cable tray ,MV Panel. MLP,MPP Body earthing.

13.12.00 Supplying, laying, connecting and commissioning 10 SWG bare Enameled copper wire with necessary clamps, screws etc.

13.13.00 Supplying, laying, connecting and commissioning 8 SWG bare Enameled copper wire with necessary clamps, screws etc.

14.00.00 LIGHT FIXTURES

14.01.00 Supplying, erecting, connecting and commissioning of 2 x36 Watts RECESSED TYPE CFL Light Fitting with Electronic Ballast of PHILIPS Cat # FBS 470 / 236 (or) Equivalent with necessary lamp holders, interconnections and other standard accessories including lamps also. Supplying, erecting, connecting and commissioning of 1 x36 Watts Box Type Fluorescent Light Fitting with 1No. Electronic Ballast of PHILIPS Cat # TMS 021/ 136 (or) Equivalent with necessary lamp holders, interconnections and other standard accessories including lamps also.

14.03.00 Supplying, erecting, connecting and commissioning of 2 x36 Watts Box Type Fluorescent Light Fitting with 1No. Electronic Ballast of PHILIPS Cat # TMS 021/ 236 (or) Equivalent with necessary lamp holders, interconnections and other standard accessories including lamps also. 14.04.00 Supplying, erecting, connecting and commissioning of 2 x 18 watts Recessed type CFL spot light fitting of PHILIPS Cat # FBH 145 / 218 LPF (or) equivalent with copper ballast and with necessary standard accessories Including lamps also.

14.05.00 Supplying, erecting, connecting and commissioning 300mm dia Exhaust fan with capacitor, interconnections, etc., and other associated accessories.

14.06.00 Supplying, erecting, connecting and commissioning 1200mm dia ceiling fan with capacitor, interconnections, etc., and other associated accessories but without regulators

15.00.00 SAFETY EQUIPMENTS

15.01.00 Supplying, erecting and connecting a 5 KG CO2 FIRE EXTINGUISHER properly fixed on the wall with necessary clamps, screws, bolts and nuts etc. The extinguisher shall be suitable for all types of fires(A, B & C).

15.02.00 Supplying, erecting and connecting a 2 KG CO2 FIRE EXTINGUISHER properly fixed on the wall with necessary clamps, screws, bolts and nuts etc.

The extinguisher shall be suitable for all types of fires (A, B & C).

15.03.00 Supplying, erecting and connecting Treatment Chart in English and Tamil directly fixed onto the wall with necessary screws etc.

15.04.00 Supplying, and laying 10mm. Thick ISI Marked Rubber mats in Front of the Panel Boards.

15.05.00 Supplying and fixing 440 V Danger Board.

16.00.00 LADDER TYPE G I CABLE TRAY

16.01.00 Supplying, fabricating, erecting & connecting the following 2.0mm Thickness G I type Cable Trays with necessary supports, tees, elbows, bends, bolts and nuts and any other associated accessories to complete the job.

16.01.01 900mm(wide) x 100mm(collar height)16.01.02 450mm(wide) x 50mm(collar height)

17.00.00 PERFORATED TYPE G I CABLE TRAY for Communication and Power

17.01.00 Supplying, fabricating, erecting & connecting the following 2.0mm Thickness G I Perforated type Cable Trays with necessary supports, tees, elbows, bends, bolts and nuts and any other associated accessories to complete the job.

17.01.01 300mm(wide) x 50mm(collar height)17.01.02 450mm(wide) x 50mm(collar height)

18.00.00 FABRTICATED TYPE SUPPORTS

18.01.00 Supplying, fabricating, erecting and connecting M S angles, M S Flats, M S channels, M S flats as required with necessary fabrication arrangements painted with two coats of red oxide primer paint and

two coats of Approved color. The cost shall also includes necessary supports, foundation bolts, etc.,

19.00.00 MISCELLANEOUS

19.01.00 Preparation of electrical schematic layout & physical layout drawings approval for the all electrical installation, equipment, like UPS, inverter, PAC, DG, etc, and obtaining safety certificate from the CEIG. The submission of drawings follow up actions & statutory fee and coordination with CEIG are the also responsibility of the DCO 19.02.00 Providing temporary connections with necessary socket outlets, light fittings With wiring in various locations for execution of the work. (Lump Sum)

Detailed Electrical Works Specifications

1.1 PANELS

The M.V panel, subpower panel, and sublighting panel have to be mounted on the Electrical panel room (SDC) at Ground floor.

1.2 UPS PANEL

The outgoing UPS panel – 1 & 2 for 250 KVA and UPS panel – 3 for 20 KVA UPS have to be mounted on the U.P.S room at Gorund floor.

1.3 Panel Fabrication Specification

The frame of individual vertical panels shall be fabricated using pressed and shaped cold rolled sheet steel of adequate thickness or by using suitable mild steel structural sections. The frames shall be enclosed by using minimum 14 SWG cold rolled sheet steel and the doors and covers shall be made of minimum 16 SWG cold roller sheet steel. Wherever required, stiffeners shall be provided to increase stiffens of large size doors and covers.

The switchgear shall be provided with integral base frame for each vertical panel. The switchgear integral base frame shall be suitable for directly bolting with the help of foundation bolts and also be suitable for tack welding at two diagonally opposite points.

All openings, covers and doors shall be provided with neoprene gaskets around the perimeters to make the Switchgear dust and vermin proof.

All hardware shall be corrosion resistant. All joints and connections of the panel members shall be made by galvanized, zinc passivated or cadmium plated high quality steel bolts, nuts and washers, secured against loosening. Suitable lifting hooks and / or jacks shall be provided on each panel or shipping section for ease of lifting of Switchboard.

1.4 Metal treatment Finish for Panels and Distribution boards

All metal surfaces shall be thoroughly cleaned and decreased to remove mill scale, rust, greased and dirt. Fabricated structures shall be pickled and then rinsed to remove any trace of acid. The under surface shall be prepared by applying a coat of phosphate paint and coat of yellow zinc chromed primer. The under surface shall be made free from all imperfections before undertaking the finishing coat.

After preparation of the under surface the switchboard shall be power coated with two coats of final paint. Color shade of final paint shall be SIEMENS GREY or shade # RAL 6032. The finished panels shall be dried in stowing ovens in dust free atmosphere. Panel finish shall be free from imperfections like pinholes, orange peels, run off paint etc. The DCO shall furnish painting procedure details along with the bids. All unpainted steel parts shall be cadmium plated or suitably treated to prevent rust formation. If these parts are moving elements then they shall be greased.

1.5 Panel erection

All Panels shall be erected at appropriate locations. All necessary foundation channels with bolts, nuts, etc., shall be considered. All shipments shall be assembly carefully at site, Before commissioning all interconnections shall be thoroughly checked for proper tightening.

1.6 Panels pre - commission test

Inspection of equipment by the ELCOT/Consultant shall be only with a view to ensure that the equipment is fabricated / manufactured, assembled, tested, supplied and commissioned as per prescribed specifications.

1.5 Distribution boards and MCB classifications

All the MCB Distribution Boards shall be of the phase segregated type, fabricated out of 16 SWG thick sheet steel and shall be of the totally enclosed dust proof type suitable for wall mounting. The Panel shall have welded back and sides and gasketted fully hinged front door.

Detachable gland plates shall be provided at the top and bottom with suitable gaskets for cableentry. All DBs will be single / double door only as specified in the BOQ.150mm height adaptor box shall be fixed above the DB for terminating and segregating the wires. Incoming MCB of required rating is in an independent. The incoming terminals shall be fully shrouded. Three phase segregated compartments, each housing MCB's connected to one phase of the power supply system. Each of the sections shall have a DP ELCB on the incoming and SP MCB's for Lighting/power on outgoing. In each section, a separate neutral bus and independent earth bus shall be provided. The MCB's shall be of current limiting type. The busbars shall be of Copper having continuous current ratings equal to that of the incoming switch. The busbars shall be designed to withstand a fault level of not less than 31 MVA for one second. The MCB's shall have a lockable switching lever. The minimum electrical endurance shall be 20,000 operations.

The housing of the MCB shall be mounted self-extinguishing thermoset plastic material. The short circuit current shall be brought to zero within 4 to 5 milli seconds from the time they are established. All MCBs shall have a minimum short circuit capacity of 10 KA RMS. Undrilled gland plates shall be provided both at the top and bottom. The degree of protection shall confirm to IP 50. Phase separation barriers shall be provided C curve MCBs shall be provided for Lighting and D Curve MCBs shall be provided for Power and UPS DBs.

1.5 MCCB control and MCB Control MCCB

MCCBs should comply with IEC 947 Part 2. The MCCB shall be suitable for universal mounting (i.e) the Load / Line must be interchangeable. The MCCB shall be suitable for operating Voltage of 415 V minimum and an Insulation Voltage of 600 V. The withstanding capacity mentioned against each MCCBs shall be Ics only. All MCCBs shall be of Thermal Magnetic type with adjustable over load releases and fixed short circuits.

Circuit Breaker

Besides the normal operating current, the adequate circuit breakers for handling in-rush and surge current to the equipment. Every equipment should be provided with a separate circuit and a circuit breaker. Circuit breaker and its related power point/socket should be properly labeled to identify the branch circuit it is controlling.

Lighting Circuits : C - Curve MCBPower/Motor Circuit : D - Curve MCBUPS Circuits : D - Curve MCB

1.6 Cables and Terminations Cable

All Power cables shall be of aluminium / copper conductors only. All control cables shall be of solid or stranded copper conductors. The control cables used for mobile equipment shall be flexible type. Power cables for 415 V AC and upto 1000 V DC and control cables for wiring within the building shall be of PVC insulated and PVC sheathed armoured / unarmoured heavy duty 1100 V grade. Cross-sectional areas of multi core power cables shall not exceed 400 sq.mm unless otherwise specified.Minimum cross-sectional area of power cable shall be 6 sq.mm in case of aluminium conductor and 1.5 Sq.mm in case of copper conductor. The cross-sectional area of neutral conductor of multicore cables shall onstitute about 50% of phase conductor for cables having cross-sectional are of 25 sq.mm and above. However this is not applicable for UPS distribution. For cables below 25 sq.mm as well as flexible trailing cables, the neutral conductor shall be of same cross-section area as the phase conductor. All cables 10 sq.mm and above shall be of stranded type.

PVC Cables: PVC insulated, XLPE Sheathed / PVC sheathed armored/unarmored heavy duty cable shall be designed, manufactured and tested in accordance with IS : 1554 (PART - I). The insulation shall consist of polyvinyl chloride compound suitably extruded with softeners and plasticizers. The inner sheath shall be either vulcanized rubber or PVC. The outer sheath shall be of XLPE compound. The armoring of multi-core cables where required shall be of single layer galvanized steel round wire or flat strip.

i) Cable Selection

The power cable sizes shall be adopted on the basis of current loading, ambient temperature condition, method of installation and permissible voltage drop in each circuit. The minimum cross-section of the cable shall be determined on the basis of available short circuit current and tripping characteristics of the circuit protective devices. Color code will be maintained for the entire wiring installation (i.e) Red, Yellow and Blue for the three phases, Black for neutral and Green for earthing. Besides, ferruling will be provided with number coding and easy identification for maintenance purposes.

ii) Cable Terminations

Cable jointing shall be done as per the recommendations of the cable manufacturer. Jointing shall be done by qualified cable jointers.Each

terminations shall be carried out using brass compression glands and cable sockets. Hydraulic crimping tool shall be used for making the end terminations. Cable gland shall be bonded to the earth by using suitable GI Wire / tape. Suitable identification tags with the feeder designation inscribed on an aluminum / G.I. Sheet steel be tied to either ends of each cable.

iii) Cables conduit tray

Cables shall be laid on cable trays/ racks wherever specified. Cable racks/ trays shall be of perforated steel section slotted angles for suitable purpose. The trays / racks shall be complete with plates, tees elbows, risers and all necessary hardware. The steel trays shall be painted. Cable trays shall be erected properly to present a neat and clean appearance. Suitable cleats or saddles shall be used for securing the cables to the cable trays. The cable trays shall comply with the following requirements:-

• The trays are ladder type and shall have suitable strength and rigidity to provide adequate support for all contained cables.

• It shall not present sharp edges, burrs of projections injurious to the insulation of the wiring /cables.

• If made of Sheet metal, it shall be adequately strength protected against corrosion or shall be made of corrosion resistant material.

• It shall have side rails or equivalent structural members.

• It shall include fittings such as horizontal, vertical bends, tie rods, hooks etc., or othersuitable means for cha8nges in direction and elevation of runs, fish plates and hard wire.

iv) Cable support systems

Method of Laying Cables:

Cables laid exposed in racks/trays/hooks and routed from trenches to individual equipments etc. shall be taken in embedded / exposed rigid G.I pipes or flexible conduits unless directly terminated to the equipment in the panels located above the trench. Extra length of cables shall be provided wherever possible for any future contingency to the extent of 10% of the length of any section. The cables laid fully buried in ground or partly in trench and partly in ground shall be armoured type. Cables are laid fully in rack/tray/hook or laid in G.I. pipes, shall be also armoured type. The installation work shall be carried out in a neat workman like manner by skilled, experienced and competent workmen particularly with experience in

jointing termination of aluminium conductor cables. Cables runs shall be uniformly spaced properly supported and protected in an approved manner. All bends in runs shall be well defined and made with due consideration to avoid sharp bending and linking of the cable. The minimum bending radius of cables shall not be less than twelve times the overall diameter. Cable installation shall be property co-ordinates at site with the routing of other services, utilities and the cable routings with a view to avoid interference with any part of the building, structure, equipment, utilities and services. All cables shall be provided with identification tags indicating the cable numbers in accordance with the cable/circuit schedule. Tags shall be fixed at both the ends of cable at joints and at 20 m. spacing for straight runs. When a cable passes through a wall tags shall be of durable fibre of aluminum sheet with the numbers punched on them, and securely attached to the cables with non-corrosive wire. For single core cables wire shall be non-ferrous material. All cables shall be tested for proper insulation prior to laying. The cable drums shall be transported on wheels to the place of work. The cables shall be laid out in proper direction as ndicated on the drum using cable drum stands. In case of higher size cables, the laid out cables shall run over rollers placed at close intervals and finally transferred carefully on to the trenches and racks. Care shall be taken so that links and twists or any mechanical damage does not occur in cables. Only approved cable pulling grips or other devices shall be used. Adequate length of cables shall be pulled inside the switchboards, control panels, terminal boxes etc. so as to permit neat termination of each core/conductor. Control cables cores entering switchboard or control panels shall be neatly bunched and strapped with PVC perforated tapes and suitably supported to keep it in position at the terminal block. All spare cores shall be neatly dressed and suitably taped at both ends. Power cable terminations shall be carried out in such a manner to avoid strain on the terminals by providing suitable clamp near the terminals. All power cable terminations shall be by means of crimping type cable lugs. Control cables shall be terminated by crimping or directly clamped in the terminal blocks by screws. No jointing shall normally be made at any intermediate point in through runs of cables unless the length of the run is more than the length of the standard drum supplied by cable manufacturers. In such cases when jointing is unavoidable, the same shall be made by means of standard cable jointing boxes/kits. All cables entry openings in the equipment shall be sealed and made proof against entry of creeping reptiles.

Laying of Cables on Racks / Trays / Brackets

All power cables in trenches and on structures shall be laid on racks and shall be clamped by means of single or multiple galvanized MS saddles. The saddles shall be placed at an interval of 1000 mm. in both horizontal and vertical straight runs, at each bend and turnings from horizontal to vertical direction and vice versa. All 1100 V grade power cables shall be laid touching each other. Multi-core control cables shall be laid touching each other on

trays and wherever required may be taken in two layers. G I Ladder type cable racks shall be selected from two sizes viz 600 mm. and 1500 mm. Ladder type trays shall be galvanized after fabrication. And inside the module shop only G I perforated type cable trays shall be used. Vertical spacing between cable racks/trays shall be 250 mm. Power cables of different voltage grades shall be laid in separate racks / brackets / hooks. Control cables as well as signal and communication cables shall be laid in a separate trays. However, in cases where smaller size power cables (below 16 sq.mm. ) of fewer numbers cables provided suitable vertical barriers are installed between them. As far as possible AC and DC Power cables shall be laid in separate trays. Order of laying of various cables in racks/trays brackets/hooks shall be such that control cables are located at the bottommost tier and 1100 V grade cables at top tier. In case of duplicate feeders of same consumer, these shall be laid in two separate racks/brackets. Where there is possibility of mechanical damage, cable rack / trays shall be adequate protected by sheet steel covers. For future installation of cables, provision shall be made to keep 20% space as spare on each tray/rack/bracket.

Cables In Indoor Trenches

Cables shall be laid in indoor trenches wherever specified. Suitable angle iron brackets, clamps, hoods and saddles shall be used for securing the cable in position.

Cables On Trays / Racks

Cables shall be laid on cable trays/ racks wherever specified. Cable racks/ trays shall be of perforated steel section slotted angles for suitable purpose. The trays / racks shall be complete with plates, tees elbows, risers and all necessary hardware. The steel trays shall be painted. Cable trays shall be erected properly to present a neat and clean appearance. Suitable cleats or saddles shall be used for securing the cables to the cable trays. The cable trays shall comply with the following requirements:-

• The trays are ladder type and shall have suitable strength and rigidity to provide adequate support for all contained cables.

• It shall not present sharp edges, burrs of projections injurious to the insulation of thewiring / cables.

• If made of Sheet metal, it shall be adequately strength protected against corrosion orshall be made of corrosion resistant material.

• It shall have side rails or equivalent structural members.

• It shall include fittings such as horizontal, vertical bends, tie rods, hooks etc., or other suitable means for cha8nges in direction and elevation of runs, fish plates and hard wire.

1.6.2. Installation

1. Cable trays shall be installed as a complete system. Trays shall be supported properly from the building structure. The entire cable tray system shall be rigid.

2. Each run of the cable tray shall be completed before the installation of cables

3. In- portions where additional protection is required , non-combustible covers / enclosure shall be used.

4. Cable trays shall be exposed and accessible.

5. Where cables of different system are installed on the same cable tray, non- combustible solid barriers shall be used for segregating the cables.

6. Cable trays shall be grounded by two nos. earth continuity wires. Cable trays shall not used as equipment grounding conductors.

1.8 Installation of wiring conductors

i) System of wiring

The system of wiring will consist of FRLS flexible copper cables (or) PVC insulated PVC sheathed FRLS copper conductor wires in M S conduits. Minimum size of copper conductor will be 1.5 sq.mm. for lighting and 4 sq.mm. for power. Color code will be maintained for the entire wiring installation (i.e) Red, Yellow and Blue for the three phases, Black for neutral and Green for earthing. Besides, ferruling will be provided with number coding and easy identification for maintenance purposes. M S conduits shall be used if they are concealed in the wall / slab.

The following cable sizes shall be used in the installation:-

a) Lighting circuits : 2.5Sq.mm.copperb) Point Wiring : 1.5Sq.mm.Copperc) Power Circuits (16 Amps) : 4.0Sq.mm.copperd) Incomer to single phase LDB : 3 core 4.0 Sq.mm. copper

e) Incomer to Three phase LDB : 4 c 10 Sq.mm.Aluminiumf) Incomer to PDBs : 16.0 Sq.mm. Aluminium to 25.0 Sq.mm. Aluminiumdepending on requirement.g) UPS Circuit (server room) : 3 core 4 SQmm flexible copper wire in MS conduith) UPS Circuit (workstation room) : 3 runs 2.5 SQmm copper wire in MS conduit

ii) Wiring to walls and above false ceiling.

All wiring shall be carried out only with M S conduits all light, fan sockets and any other equipment must be earthed. Wiring shall be carried out with 650 V grade PVC insulated single core multi stranded copper conductor wires as per IS : 694. The method of wiring shall be as recommended in IS: 732 and its several parts. The physical and electrical continuity of the conduit system shall be maintained throughout. No wire shall be left exposed at any location; metallic flexible pipe shall be used to cover the same. Color coding of wire shall be carried out as detailed below:

PHASES RED/YELLOW/BLUE

NEUTRAL BLACK (OR) GREYEARTH GREEN

The minimum diameter of the conduits shall be 25 mm. only. The following sizes of PVC insulated multi stranded copper conductor wires shall generally be followed throughout:

a) From the final switch to individual outlets 1.5 sq.mmb) From Distribution Boards to First Switch Board and 2.5 sq.mmc) subsequent switchboardsd) All 15A socket (Only Phase & Neutral) 4.0 Sq.mm.e) Earth wire throughout for Lighting. 1.5 Sq.mm.f) Earth wire for raw power 2.5 Sq.mm

1.9 Earthing Network

General Earthing System Distributed earthing will be carried all along the LT distribution system, through local earth stations effectively bonding the cables / equipment. For Main building, Substation and Electrical Panel SDC Room, one main earthing ring will be provided along the building periphery connected to required number of earth electrodes. The earthing ring will be taken 1525 mm away from building column / wall and will be laid directly uried in ground. Main earthing ring will be further cross-connected and a mesh formed depending on the layout and location of the equipment.

The cross-connections will generally run in cable trenches, or embedded in concrete floor based on the layout.

All non-current carrying metallic parts of various electrical equipment as well as cable armouring metallic conduit/GI pipe system, cable racks/trays brackets, supporting structures etc. will be effectively earthed. Earthing of medium and high voltage equipment will be done by means of two separate earth conductors connected either directly to earth electrodes or to an earthing ring irrespective of use of armoured cable or metallic conduit/GI pipe.

Building / technological steel structures, metallic utility pipes will not be used as earth continuity conductor.

All earthing system will be so designed as to ensure effective operation of protective gears in case of earth faults. The total earth resistance at any point of the earthing system for substations and main plant buildings will not be more than one ohm. However, at other points the value will not exceed 3 Ohms. Generally, main earthing rings and earthing leads will be directly buried in ground. Additional earthing rings wherever provided inside plant buildings/substations and earth continuity conductors will be taken either exposed on cable racks/trays, structures, walls, ceiling etc. or embedded in concrete depending on installation. Earth conductor directly buried shall be taken at a depth of 600mm. It shall be provided with one coat of bituminised paint, at all welded joints to prevent corrosion. Earthing ring wherever embedded in concrete will be laid parallel to the column rows of buildings. Earth continuity conductor embedded in concrete will generally follow the shortest route and wherever possible will be taken along pipes embedded for laying of cables. Earth conductors lay on cable racks, trays etc. will be placed in accessible location keeping adequate clearance to facilitate easy connections All 3 phase equipments will have duplex earthing, whereas single phase equipments will have only one run. The schematic earthing diagram is given in the Diagram no. ‘302-02-04’ Earthing for light and power points will be carried out using insulated copper earth wire running throughout the length of circuits and will be terminated at boxes, fixtures etc. with effective bonding to main earth. Separate and distinct earth stations and electrodes will be provided for UPS System, EPABX (refer Digram No. 302-02-03)and Server Racks (refer Digrams No. 302-02-03 & 302-02-05). Earthing for UPS Neutral, Server Racks and EPABX points will be carried out with insulated copper earth wires. The total earth resistance at any point shall not be more than 1 Ohm.

i) Technical Specification for Earthing system of pipe earth.

2.5 Mtr. long 40 mm. dia G.I. Pipe with holes drilled diametrically opposite to each other once every 150mm. in an earth pit of 380 x 380 x 3000 mm. filled with salt and charcoal mixed with sand in alternate layers 150 mm. each upto a height of 2500 mm. from bottom. The pipe shall have

provision for watering through a funnel. It shall also have for connecting providing the 50 x 6 mm. GI Flat on two sides. A masonry structure shall be constructed to a depth of 750 mm. and a heavy-duty C.I Cover shall be used to cover the pit.

ii) Technical Specification for Earthing system of plate earth.

Copper plate of size 600mm.x 600 mm.x 3.15mm. at a depth of 2000 mm. in an earth pit of 700 x 700 x 2500 mm. filled with salt and charcoal mixed with sand in alternate layers 150 mm. each upto a height of 2000mm. from bottom. The pipe shall have provision for watering through a funnel. Itshall also have for connecting 25 x 6 mm. Copper Flat on two sides. A masonry structure shall be constructed to a depth of 750mm. and a heavy duty C.I Covers shall be used to cover the pit.

ii) Earthing conductors

2R x 1c 120Sq.mm. PVC Insulated copper conductor wires enclosed in PVC Conduits with necessary clamps, screws, interlinks etc. for 250KVA UPS. 2R x 1c 25 Sq.mm. PVC Insulated copper conductor wires enclosed in PVC Conduits with necessary clamps, screws, interlinks etc. for 20KVA UPS and EPABX. 1R x 1c 50 Sq.mm. PVC Insulated copper conductor wires enclosed in PVC Conduits with necessary clamps, screws, interlinks etc. for server rack earthing from the erath electrode. 1c 10 Sq.mm. PVC Insulated copper conductor wires enclosed in PVC Conduits with necessary clamps, screws, interlinks etc. for server rack earthing. 40 x 6 mm. copper Flat laid in open fashion with necessary clamps, screws, interlinks etc., for neutral of DG. 50 x 6 mm. GI Flat laid in open fashion with necessary clamps, screws, interlinks etc., for cable tray ,MV Panel. MLP,MPP Body earthing. 10SWG bare enamelled copper wire for DB earthing. 8 SWG bare enamelled copper wire for VPDB earthing.

iv) Precautions

All jointing of earth flats shall be done in such a way that all surfaces shall be thoroughly cleaned and rubbed with emery paper before jointing. Ensure that there is no air gap between the flats after jointing.

2.0 light Fittings fixtures work

The adequate Light fittings shall be deployed in the SDC. The light fittings shall be preassembled with necessary ballasts, lamp holders, lamps, interconnections, terminal connectors and other associated accessories. The

light fittings shall be carefully installed at site. Until hand over necessary protection sheets like polyhthene covers shall be provided so that no insects can go in.

2.1 Safety Equipments

All safety equipments shall be positioned optimally as well as the procedures followed by the local authorities. All safety equipments shall be as per IS standards as specified in the BOQ.

2.2 Fabricated type supports and Miscellaneous.

Wherever needed, these supports shall be provided to suit the requirements. All supports shall be painted as specified. All supports shall be properly fixed on to the ceiling with necessary anchor fasteners.

A. Electro Static Discharge (ESD) Control

The Data Centre shall be provided with appropriate methods & equipment to effectively reduce ESD. It is required that the personnel handling sensitive equipment shall use wrist straps, heel grounders, etc to reduce the likelihood of human instigation of ESD. Cabinets, Racks, cages shall be properly grounded & operated by trained officials during inspection, maintenance and repairs. Usage of room ionisers is preferred to attract charged objects for neutralization.

B. Emergency Power Supply

Emergency supply system with Inverters will be provided to maintain minimal light levels thro’ an independent inverter system with Sealed Maintenance Free batteries. Emergency lighting fixtures will be located strategically (refer Diagram No. ‘302-16-01’) DCO should provision for Backup Diesel Generators sets to support the UPS in providing emergency power supply to the computer equipment in a prolonged power outage. The need of diesel generator depends on the service requirements of the computer system. However, the generator should also be able to support other essential facilities and equipment such as the airconditioning system, security and access control system and lighting. The DG set shall come online automatically within 10 seconds of AC mains failure.

The DG set should have an Auto Synchronizing Panel (ASP) MV panel controller between main power & DG set. DCO should make an arrangement with a Fuel Supply Company for continuous supply of Diesel to DG sets in case the Fuel supply is erratic, not available or is deficient on any reason whatsoever. The DCO should store diesel sufficient enough to last for a minimum of 7 days. DCO shall provide the details and formal arrangement

copy with the Fuel Company to ensure that DCO is guaranteeing fuel availability. DCO shall also provide the diesel storage and replenishment policy to ELCOT. ELCOT shall provide space for parking their Fuel Replenishment vans etc.

Energy Saving

Apart from implementing effective maintenance & service schedules and use of energy efficient drives, especially motors, the following is proposed for implementation.

• Use of LED indicators in EXIT signs with battery backup instead of incandescent lamps• Use of energy efficient transformer• Use of CFL lamps which are more efficient.• The LT side voltage will be maintained constant as an energy saving concept.

CEIG Approval:

DCO shall be responsible for preparation of electrical schematic layout & physical layout drawings approval for the all electrical installation, equipment, like UPS, inverter, PAC, DG, etc, and obtaining safety certificate from the CEIG. The ubmission of drawings follow up actions & statutory fee and coordination with CEIG are the also responsibility of the DCO.

2.3 Description of work & Specification 2x3 KVA Inverter (Detailed TechnicalCompliance is provided in Technical Bid

2x3KVA Inverter shall be located in the UPS Room in the Ground Floor adjacent to the Electrical Panel Room (SDC) with 30minutes battery backup as specified. Necessary incoming and outgoing power distribution shall be done. The location of the light fittings meant for the Emergency optimally designed. The emergency wiring shall be deployed to the rooms in the first floor.

Technical Compliance for Diesel Generator :

Scope: The qualifying bidder has to supply, install and commission DG set comprising of 2 Nos. 385 KVA, for the Data Centre/ Disaster Recovery Centre as per following requirements & specifications as per the detailed Technical Specifications & drawings as given in the tender.

Introduction:

Two DG Sets of each 385 KVA prime output capacity is required for this project. The set shall automatically start one after the other upon mains power failure depending on the line loads, run up to full speed within 6 seconds of power failure. The set shall be provided with a multiple start mechanism with indication of alarm for “failed to start” condition. A Tachometer switch shall provide control for the start mechanism and also for the "run” indications. The set shall be skid mounted on independent foundation. The acoustic treatment shall ensure a maximum sound pressure not more than 68 dB (A) at 1 meter distance during the day and 45 dB (A) at the neighbour’s premises during night, while running on partial or full load. This condition shall apply to the engine exhaust noise levels also. A vertical type “Critical” silencer shall be fitted on the exhaust pipe after the flexible coupling to reduce the exhaust noise. The exhaust gases shall be piped to the top of the building covering full height of the building. The pipe shall be thermally insulated with ceramic insulation and covered overall with aluminum jacketing. The exhaust pipe and Critical Silencer shall be fixed on a steel structure which shall be rigidly fixed to external wall vertically.

Specification for Equipments:

A. ENGINE

The basic diesel engine shall be Water cooled diesel engine with exhaust Turbo charging and charge air cooling, four valve, individual cylinder heads with exhaust valve rotators, fuel oil pump, fuel duplex filter with diverter valve, fuel injection system, electronically controlled injection, lube oil circulation and coolant thermostats for main cooling and charge air cooling circuit, necessary drives, dry exhaust manifolds, vibration dampers, all necessary pipe work, electric starter suitable for 24 V DC, Generator 28V

DC, Electronic speed governor, Fuel filters, Oil dip stick, Oil extraction equipment with hand pump, set of air filters including maintenance indicators, exhaust bellows with connecting flange.

Diesel Engine – Diesel Engine, water cooled, Naturally Aspirated, developing 385 KVA @ 1500 RPM, under NTP conditions of BS: 5514, with Dry Type Air Cleaner, Compact Radiator with Recovery Bottle and Pusher type Fan, Engine with Coolant, Engine mounted panel with wiring harness, Holset Coupling and Industrial Silencer, as per engine manufacturers design standards.

B. GENERATOR

Two Nos. of Standard design Alternator, rated at 385KVA Output, 0.8 PF, 415 Volts, 3 Phase, 4 wires, 50 cycles/sec, 1500 RPM, self-excited and self regulated, with brushless excitation, Self- ventilated, Screen Protected Drip Proof, Insulation Class “H”, enclosure IP 23. The A.C. Generator shall be Horizontal foot mounted single bearing type and shall be fitted with Automatic Voltage Regulator (AVR) for Voltage regulation of +/- 1% or better having response time not more than 1 second. The Alternator generally conforms to BS: 5000/IS: 4722 and suitable to deliver output of the engine capacity having 385 KVA.

C. SWITCH BOARD – AUTO SYNC PANEL

The Switch Board shall be of standard design, free standing, dust and vermin proof and wired up to terminals ready for installation. The Switch board with Auto Synchronizing Facility included Auto Start and Auto OFF facility.

AUTO START LOGIC

The DG set with enclosure and Auto Start Logic. The Panel should have provision to receive reference EB Supply through potential free contacts to enable connection of external audio alarm in case EB Supply has resumed. Separate battery charger cost to be indicated and the reference EB Supply can be used to charge the batteries. The Auto Start Logic shall be in such a way that the moment EB supply has failed or if the voltages reduce to a pre-determined level, it shall be detected through a voltage monitor and a command shall be given to DG to start with a timer.

After the DG voltage has built up to a certain level, the command for changing over of motorized MCCBs from EB to DG or vice versa shall be given. When the EB supply gives normal voltage or has resumed, the command to change over shall be issued with a timer. However, the stopping

of the DG shall be only after the DG has run for about 5 minutes on no load basis for it to cool down.

D. BATTERY CHARGER AND BATTERY

24 Volts Battery with Float cum boost charger.

Control Panel – Cubicle type, floor mounting Control Panel, with hinged doors, bottom gland plate and accommodating the following:

1-No. ACB or Molded Case Circuit Breaker 3-No.’s Ammeters /1 No. Ammeter with Selector Switch 1 No. Voltmeter with Selector Switch 1 No. frequency meter 1 Set Pilot Lamps LOAD ON/GENERATOR ON 1 Set Instrument Fuses

E. CABLES

Power cables & Control cables are interconnected to use between Generator and Auto Sync Auto load Sharing panel. The required cables for all auxiliary equipment are to be included in the scope of supply.

All Starters and auxiliary devices / drives if any required should be Included in the scope of supply.

Audio Alarm and Indicators:

A separate 24 Window annunciation panel shall be installed in the panel for indicating the following conditions on both sets. A common alarm shall also be sound locally.

• Engine Run Condition• Set failed to start• High Water temperature• Low Lub Oil Pressure• Engine Over Speed• System Power ON• MCCB Open• Under Voltage• Over Voltage• Frequency Out of Limit• Over current trip• Earth Fault• Reverse Power Trip

• Reverse KVA Trip• Low and High Fuel level• Fail to Synchronize• Load exceeding limit• Low and High Coolant level in the radiator• High Alternator Stator temperature• High Alternator Bearing temperature Alarm• Restricted earth fault trip.

INDICATORS:

The indication shall be provided with the following:-• Set On• Load On• Auto / Manual Load• DG Set Trip due to Over Load• DG Set Trip due to Short Circuit• EB supply fails• EB supply restored and Reset• Battery charging (Trickle charger with Volt Meter and Ammeter required) Indicator for Battery charging and discharging in one Ammeter shall be provided.• Mains On

BATTERY CHARGER:

Proper DC Charging circuits shall be incorporated in the control panel to boost and trickle charge the 24 V DC batteries used for starting the engine. The Control circuit voltage shall be 48 V DC.

Proper DC charging circuits shall be incorporated in the Control Panel to boost and trickle charge the 48 V batteries used to power the control circuit. The selection of battery shall be done in such a way that the batteries will be able to power the circuit even if charging does not take place for 48 hours.

AUDIO ALARM:

Audio Alarm along with indication shall be provided whenever the synchronizing Batteries as well as the control circuit batteries reach a voltage level below 20 V and 40 V respectively.

AUTO MANUAL SELECTOR SWITCH:

The function of the Auto Manual Selector switch is to

• Make the operation of the entire panel including operation of change over MCCBs. DG Set starting, stopping etc., selectable between Auto & Manual.

• Care should be taken in such a way that the panel does not remain partly in Auto and partly in Manual mode when the switch is operated.

MEASURING DEVICES IN CONTROL PANEL:

The following Meters shall be provided in the Control Panel Compartment:-

• DC Ammeter in the DG Charging Kit• DC Voltmeter to measure battery voltage• DC Ammeter in the trickle charging Kit.• DG Set speed in RPM• Hours Run Meter• 2 Nos. CTs of 1000/ 5 A of Class 5 P 10 for Protection.

Base Frame – Sturdy, fabricated, welded construction, channel iron Base Frame for mounting the above Engine and Alternator.

Fuel Tank – Necessary liters capacity Fuel Tank with mounting brackets to run for 8 hours complete with level indicator, fuel inlet and outlet, air vent, drain plug, inlet arrangement for direct filling and set of fuel hoses for inlet and return. Diesel storage requirement for minimum 24 hours should be maintained Battery – Dry uncharged maintenance free batteries with leads and terminals.

Management - The DG set should be manageable via Building Management System/ NOC with MODBUS Protocol with RS 485 Communication Port so that all software features like Diesel Consumption, Power, and Current etc. can be monitored on the BMS screen.

DUTY CONDITIONS:

The Generator shall be capable of starting and running continuously for about 12 hours.

GENERAL

o The DG must be stiffened properly and reading for noise and vibration at full variable condition to be checked before dispatch to Site. Expansion bellows to be provided before and after silencer.

o The Qualifying bidder would be responsible for conducting the Load Test of D.G set for 6 hours with Diesel (Load to be arranged by the Tenderer).

o All consumables towards testing of DG at the factory and project site shall arranged by the Qualifying bidder till the issue of commissioning certificate.

o The qualifying bidder shall obtain permission / approval from the Board for the installation of the DG Set as per exact Rules at their own cost.

o BMS integration through MODBUS protocol with RS485 interface should be provided

o DG set shall be installed outdoor.

Technical Compliance for INVERTER OF 2x3 KVA

Output Power factor At full rated load (KW) 0.9 with no de rating. System withhigher power factor shall be preferred.Rectifier / Charger Technology PWM Control with IGBT as rectifying element with dualmode of charging.Input Voltage 230V ACInput V Range +15% to - 30%Input Frequency 50 HzFrequency Range +/- 5%Input Power Factor 0.99 to unityInput Current Harmonic Distortion THD – less than 5%Duty Continuous at 40 oCent.Walk in time 1 to 60 seconds (every 1 second site selectable).Converter output (DC Voltage) Manufacturer standard with ripple on DC bus <1% RMSwithout battery being connected to the DC bus.Inverter Technology PWM with IGBT with instantaneous sine wave control (tobe provided through dual microprocessor control).

Inverter output voltage 230 AC +/- 1% 1 Ph. 3 wire.Voltage Regulation Balanced Load +/- 1% for conditions given belowa. For 0 to 100% load variation.B. Inverter DC I/P Voltage variations (max. - min)c. Ambient Temp 0 to 45 degree CentigradeTransient Voltage Regulation a. +/- 5% for 100% load step.b. +/- 1% for loss of mains supply or on return of mainsc. +/- 5% for load transfer from bypass to inverterTransient Recovery time 20 milliseconds for 0 to 100% step loadOutput Frequency in free running mode. 50Hz. +/- 0.01%Wave form Pure SinusoidalTotal Harmonic Distortion at output <3% for linear load<5% for 100% non-linear loadManual bypass switch Required for maintenance. The transfer should be makebefore-break transferProtection - Input MCB / Lexic/equivalient

- Battery MCB / Lexic /equivalient- Output contactor / MCB/ Lexic / equivalient- Input Under / Over voltage- Rectifier over voltage- Rectifier over current- Rectifier over temperature- Battery low- Battery charging current limit- Output under / over voltage- Output over load- Output short circuit- Inverter over temperature- Semiconductor devices to be protected adequatelywith ultra fast current sensors, semiconductor fuses,Diagnostic Facility Inverter System to have fault diagnostic facility functionalon real time basis, giving the nature of faults and theaction to be taken by the user.Ambiant Temp. Range.0 to 40oCent. Continuous without de rating.Operating relative Humidity 0-95% non condensing.Environ ment protectionAll PC Boards to be covered with protective coating orHermetically sealed. The life expectancy shall beminimum 15 years.Audible Noise < 68 dBA.Degree of Ingress protection IP40.

Powder Coating / Painting as perapproved colourPowdered coated to a thickness of 70 +/- 5 microns.Inverter Testing Standard IEC 62040 Part IIIBatteries :TypeHigh rate discharge sealed VRLA type having aminimum life of 5 yearsBattery life Min 5 yearsBattery backup time 20 minutesApplication Emergency LightingLocation Air Conditioned RoomOverload withstand duration with 150%loading1 minuteOverload withstand duration with 125%loading10 minutesEfficiency at rated power factor at 50% Min 88%

loadingEfficiency at rated power factor at 50%loadingMin 88%

11 KV /440V, 500KVA Distribution Transformers:

HV & LV UG cables and Termination:

HV & LV Power Panel with automatic change over system:

Panel and Distribution Boards:

Point wiring and conduting works:

Lighting fixtures and Accessories:

Mobile sockets and straight plugs:

Earthing and Earthing strips:

Sl.No.

Description Qty in

Nos.

Capacity in Tons

KW per Ton

Total Load in KW

Total Load

in KVA

Max. Demand in KVA

1 UPS Load for Server Room

2 Nos.

320 320

2 UPS Load for Other Area

2 Nos.

100 100

3 AC for Server Room

51 2.35 119.85 150 150

4 AC for Network and MUX Room

10 2.35 23.50 29.375 30

5 CFM AC Unit for UPS Room

6 2.35 14.1 17.625 20

6 3Tr AC Units 2 6 2.35 14.1 17.625 207 2Tr AC Units 3 6 2.35 14.1 17.625 208 1Tr AC Units 6 6 2.35 14.1 17.625 209 Lighting 15 18.75 2010 Additional

Load

electrical works for data centre-01oct10

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