specification for 6.6kv 440v power transformer

7/23/2019 Specification for 6.6kV 440V Power Transformer

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Doc. No (BAB) : 21022-BAE-77500-EL-SP-1001

Rev No : B0

Page : Page 2 of 22

TABLE OF CONTENTS

1.

INTRODUCTION ......................................................................................................................... 3

1.1 PROJECT BACKGROUND ......................................................................................... 3

2. ABBREVIATIONS AND DEFINITIONS ...................................................................................... 5

2.1 ABBREVIATIONS ........................................................................................................ 5

3.

SCOPE OF DOCUMENT ............................................................................................................ 6

4. CODES, STANDARDS, REGULATIONS AND REFERENCES ................................................ 7

4.1 GENERAL .................................................................................................................... 7

4.2 ORDER OF PRECEDENCE......................................................................................... 8

4.3

TECHNICAL DEVIATIONS AND EXCEPTIONS......................................................... 9

5.

LOCATION AND ENVIRONMENTAL CONDITIONS ............................................................... 10

6. ELECTRICAL REQUIREMENT ................................................................................................ 11

6.1 DESIGN DATA ........................................................................................................... 116.1.1 General ........................................................................................................... 116.1.2 Safety Requirements ...................................................................................... 126.1.3 Design and Construction ................................................................................ 126.1.4

Other Accessories .......................................................................................... 16

6.1.5 Noise............................................................................................................... 17

6.2 MATERIALS ............................................................................................................... 17

6.3

DESIGNATION AND NAMEPLATE .......................................................................... 17

6.3.1

Designation ..................................................................................................... 17

6.3.2 Name Plates ................................................................................................... 17

7. INSPECTION AND TESTING ................................................................................................... 19

7.1 TYPE TEST ................................................................................................................ 19

7.2 ROUTINE TEST ......................................................................................................... 20

8. APPENDICES ........................................................................................................................... 21

8.1 APPENDIX A: EQUIPMENT DATA SHEET .............................................................. 22


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1. INTRODUCTION

1.1 PROJECT BACKGROUND

Husky CNOOC Madura Ltd. (HCML hereinafter called COMPANY) plans to develop the Madura

Strait Block BD gas reserves for sales gas to buyers in Java Island. This field is located offshore

in the Madura Strait East Java, about 65 km east of Surabaya and about 16 km south of Madura

Island. The project envisages development of a wellhead platform; an offshore spread moored

converted tanker based Floating, Production, Storage and Offloading (FPSO) with gas processing

facilities and self-sufficient offsite and utility systems; Gas metering Station (GMS) at onshore; 10

Multiphase flexible riser connecting wellhead platform to FPSO, 16 gas export flexible riser

connecting FPSO to wellhead platform (WHP) and 16 export gas pipeline from WHP to GMS.

The FPSO will provide electrical power via 6.6 KV subsea power cable and communication via

fiber optic cable to WHP.

The facility is designed for 110 MMscfd sales gas. An unmanned wellhead platform with four well

slots and two slots for future expansion would be set in 182 feet of water. The FPSO will be

located at a distance of 125 m from WHP. The well fluids would be delivered from WHP to FPSO

via a 10 multiphase flexible riser.


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At FPSO, the main process components of the gas processing facilities would include: fluids inlet

separation, gas sweetening, gas dehydration and hydrocarbon dew point control equipment,

condensate stabilization, condensate storage and export, produced water treating and disposal,

and sulfur recovery with molten sulfur export. The gas is separated from the liquids through three

stage of separation. The sour gas is treated with an amine solution to remove all H2S and some

of CO2. The sweet gas is then dehydrated to 7 lbs/mmscf to meet water dew point specifications

and enter the Dew Point Control System unit for controlling the hydrocarbon dew point. The

treated gas is then transported through a 16 flexible riser to WHP. From WHP treated gas flows

through 52 kilometer long carbon steel pipeline to a gas metering at onshore and distributionsystem in East Java near Pasuruan.

The condensate from the separators is stabilized to meet sales specification and stored in tanks

integral with the FPSO Barge which will total 370 kbbls. The condensate is loaded onto shuttle

tanker for shipment to market.

Acid gas from the amine unit is processed in sulfur recovery unit to recover the sulfur in molten

form to export to molten sulfur tanker by offload hose. Molten sulfur is stored in 2 x 1500m tanks.

The gas exiting the LP, MP separators and Condensate Stabilization Unit is routed to the Gas

Recompression Package. The recompressed gas is then routed to the HP Separator before beingrouted to the Gas Treating Unit.

The produced water from the FPSO topside facilities is collected in the degasser from the

degasser the separated water is pumped to the de-oiling package which consists of liquid/liquid

hydrocyclone and produced water polisher. After the water is de-oiled, the treated water will go to

the sour water stripper where the dissolved H2S is removed from the water using stripping

column before being disposed to the sea.


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2. ABBREVIATIONS AND DEFINITIONS

Within the body of this document, the following definitions apply:

COMPANY BUMI ARMADA OFFSHORE HOLDING LIMITED (BAOHL)

CLIENT HUSKY CNOOC MADURA LIMITED

CONTRACTOR Direct contractors or their assigns

2.1 ABBREVIATIONS

ABS American Bureau of Shipping

ACB Air Circuit Breaker

AN Air Natural

ASTA Association of Short-Circuit Authorities

BKI Biro Klasification Indonesia

BS British Standard

EPR Ethylene propylene rubber

FPSO Floating Production Storage & Offloading

HV High Voltage

IEC International Electrotechnical Commission

KEMA Keuring van Elektrotechnische Materialen te Arnhem

LSZH Low Smoke Zero Halogen

LV Low Voltage

NER Neutral Earthing Resistor

N/C Normally Close

N/O Normally Open

PTC Positive Temperature Coefficient

SWA Steel Wire Armour

XLPE Cross-linked Poly-Ethylene


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3. SCOPE OF DOCUMENT

This document defines the minimum requirements for design, materials, fabrication,inspection, testing, painting, documentation and preparation for shipment for the supply of

Power Transformer to be installed on the FPSO.

This document is prepared as an attachment to the electrical requirement for E-House

package unit and hence to be read in conjunction with the main package unit specifications.

This specification indicates only electrical requirements for the equipment within the

boundaries of package unit to be installed on the FPSO.

The CONTRACTOR shall note and refer E-House package specification for detailed scope of

supply and services, spare parts and special tools, unit rates, environmental data, quality

assurance, painting, shipment, preservation, inspection, testing, guarantee / warranty,documentation, technical assistance, training and other miscellaneous requirements.


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4. CODES, STANDARDS, REGULATIONS AND REFERENCES

4.1 GENERAL

CONTRACTOR shall consider the most recent issue of the applicable Codes and Standards

listed below as part of the technical requirements for the equipment items to be supplied.

Equipment shall be designed in accordance with the following international codes and

standards including any addenda published for the edition listed unless they are superseded

by the latest edition.

IEC standard shall be used as primary guide to the design, however certain specific code,

standard and regulation shall be made into reference in case more stringent specific

requirement to be followed as per list below:

CLASS

ABS Guide ABS Guide for Building and Classing Floating Production

Installations

ABS Guide ABS Guide for Building and Classing Facilities on Offshore

Installation

SVR 2012 Rules for Building and Classing Steel Vessel Rules (2012)

BKI Guidelines for Construction and Classification of FPSO

British Standard

BS 4800 Schedule of Paint Colours for Building Purposes

International Electrotechnical Commission (IEC)

IEC 60038 IEC Standard voltages

IEC 60044 Instrument transformers

IEC 60050 International Electrotechnical Vocabulary

IEC 60071 Insulation Co-ordination

IEC 60076 (All Parts) Power transformers

IEC 60085 Thermal evaluation and classification of electrical

insulation

IEC 60270 High voltage test techniques - Partial discharge

requirements

IEC 60529 Degrees of Protection Provided by Enclosures (IP

Code)


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IEC 61000 Electromagnetic compatibility (EMC)

IEC 61892 Mobile and fixed offshore units Electrical installations

Institute of Petroleum

IP 15 Institute of Petroleum Model Code of Safe Practice Part

15 - Area Classification Code for Installations Handling

Flammable Fluids, 2nd Edition

Reference Documents

Descript ion COMPANYs Doc. No.

Electrical Design Basis 21022-BAE-30000-EL-RP-0001

QA/QC Instruction to contractors 21022-BAB-04101-QA-PR-0001

4.2 ORDER OF PRECEDENCE

The Project Data Sheets complete with the Project Drawings, this Specification and other

documents attached to the Technical Requisition are considered the overall governing

document determining CONTRACTORs Scope of Supply. The most stringent rules shall be

applied. In the event of scope overlapping of different rules, the more stringent requirementshall apply:

a) Indonesian Government Acts and Regulations

b) Classification Society: ABS & BKI

c) Requisition

d) Data Sheets

e) Specification/Drawings

f) Other Project Specifications

g) Industry Codes, Standards and Recommended Practices

Any discrepancies or conflicts among the documents listed above shall be called to the

attention of COMPANY for resolution prior to purchase, design or fabrication.

If, in CONTRACTORs opinion, any portion of this Specification is not considered good

design, good operating practice, or results in a deviation from CONTRACTORs standard

factory practice, CONTRACTOR will refer such items to COMPANY for resolution.


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4.3 TECHNICAL DEVIATIONS AND EXCEPTIONS

The CONTRACTOR shall inform the COMPANY of any deviation or exception from this

Specification along with their bid. In the absence of any exception or clarification, it shall be

construed that the CONTRACTOR will comply fully with the requirements of the

Specification.


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5. LOCATION AND ENVIRONMENTAL CONDITIONS

Electrical equipment and material shall be designed for following environmental conditions:

Environment: Humid, Salt Laden and Corrosive

Max. Relative Humidity 100%

Equipment Design Temperature: 40 deg C

Equipment shall be designed in accordance with the design temperature.

Altitude: < 1000 mtr above mean sea level


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6. ELECTRICAL REQUIREMENT

6.1 DESIGN DATA

6.1.1 General

Transformer Package shall consist of:

Dry type cast resin encapsulated transformers complete with weatherproof enclosure

IP42. The voltage ratio, quantities and other details to be as per data sheet.

Winding temperature detectors for temperature monitoring

Removable bi-directional rollers

Steel base

The transformer CONTRACTOR shall provide detail information as required/requested by

bus duct/switchboards CONTRACTOR on the terminal box interfacing.

Unless otherwise specified in the data sheets and / or other requisition documents the

transformer shall meet the requirements of this specification in every respect and shall be

suitable for continuous operation at full load.

All equipment, materials and components included in the delivery shall be compliant to the

associated standards for electromagnetic compatibility in respect to emission and immunity

such as but not limited to IEC 61000.

The transformers % impedance (without negative tolerance) shall be as per data sheet to

limit peak fault levels to within reasonable limits.

The transformer shall be fully type tested by ASTA or KEMA or other COMPANY recognized

independent certification organizations for adequate short circuit withstand capability. Reports

shall be submitted with the bid.

The HV/LV (6.6/0.46kV) transformers shall have delta connected primary winding with the

secondary winding connected in star. The 6.6/0.46kV transformers shall be Dy11 with the

secondary winding star connection unearthed.

The high and low voltage terminal boxes shall be located on opposite sides of the

transformer. The terminal boxes shall be completely enclosed with a bolt-on front cover. All

connections shall be sized to carry the maximum continuous current (including overload

where relevant), and also the prospective through fault currents. Test certificates or

calculations shall be available for all main cable connecting boxes to confirm short-circuit

withstand capability.

Transformer bushing insulations shall be mounted sealed and leak proof. They shall be of

high quality, high strength, non-hydroscopic and non-tracking material, capable of

withstanding rough handling during transportation, erection and maintenance, and duringnormal and short circuit conditions.


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The transformer shall be suitable for continuous operation at full load for a minimum of

30,000 hours without maintenance for which the transformer has to be de-energized.

The transformer shall be capable of supplying its rated power without exceeding theoverheating limits specified in the standards when;

Supplying rated load at rated frequency with voltage variation of +6/-10% rated.

Supplying rated load at rated voltage with frequency variation of 5% rated.

Cable terminal boxes shall be made of 316L stainless steel. The covers of all cable

terminating boxes shall be secured using non-loosening bolts and screws. The cover of all

cover boxes shall not be removable without the use of any tools. Removable cover access

plates shall be provided with handles.

Low voltage terminal box shall be designed to suit bus duct connection. CONTRACTOR shall

liaise with bus duct CONTRACTOR to obtain connection details.

Facilities shall be provided for earthing of each cable protective screen and/or armour inside

each cable terminal box, including those for secondary or auxiliary circuits.

Topside installed transformers shall be forced air cooled (ANAF for 65-TXR-7520/7530/7540)

and engine room installed transformer (D3-TXR-7550 shall be AN), the CONTRACTOR shall

submitcalculations to substantiate temperature rise rating, all components shall be rated to

meet this requirement.

The transformer shall be provided with cooling fan and related temperature control of fans to

be provided for increasing rating of transformer (air forced).

6.1.2 Safety Requi rements

6.1.2.1 Short Circui t Capacity

CONTRACTOR shall describe the measures taken to minimize the probability of internal

faults or to reduce the risk for this as meant and in line with IEC 60298, paragraph 5.101.

The transformers and all its components shall be capable of withstanding the thermal and

dynamic stresses, resulting from the prospective short circuit currents as specified, withoutthe possibility of injury to personnel.

The cast resin transformers shall be provided with an enclosure to provide adequate

shielding of personnel from live parts and possible capacitive currents when touching the

encapsulation of the transformer. Inside the enclosure all live parts shall be protected against

accidental contact when the transformer enclosure is opened.

6.1.3 Design and Construct ion

6.1.3.1 Windings

The transformer shall have separate HV and LV windings. Windings shall be uniformly and

fully insulated and cast resin encapsulated. Material for both HV and LV windings shall be of

high conductivity copper.


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Construction of high voltage and low voltage windings shall use materials that;

Avoid mismatch in thermal coefficient of expansion between conductor and epoxy resin

to minimise thermal stress

Reduce the winding interlayer or interturn electric stresses for a high impulse voltage

withstand capability

Prevent undesirable gas inclusions and formation of air cavities in the high voltage

windings to prevent partial discharges up to twice the rate voltage

Result in windings that are mechanically robust, maintenance free, humidity resistant,

tropicalised, fire resistant and self-extinguishing

Windings and connections shall be adequately braced to withstand thermal and mechanical

shocks and electro-magnetic impulsive forces expected during normal operation, during short

circuit under all operating and handling conditions.

The minimum insulation class shall be F to IEC 60085 with temperature rise limited to Class

B. Windings shall be clamped between resilient and insulated blocks to provide effective coil-

to-coil damping and to reduce noise emission. The HV winding shall provide rigidity against

impulse test stresses to be proven in the type test report. The HV windings shall be free of

partial discharge up to the test voltage.

For 6.6/0.46kV transformers, windings shall have insulation withstand levels as given below:

HV (6.6kV)- Primary and HV (6.9kV at no load)- Secondary

a) Nominal voltage : 6.6kV rms

b) Rated voltage : 7.2kV rms

c) One minute power frequency withstand voltage : 20kV rms

d) Rated lightning impulse withstand : 40kV peak

e) System symmetrical short circuit rating : 25kA rms for 3 secs,

LV (0.46kV at no load)- Secondary

a) Nominal voltage : 440V rms

b) Rated voltage (No load voltage) : As required

c) One minute power frequency withstand voltage : 3kV rms

d) Rated lightning impulse withstand : 20kV peak

e) System symmetrical short circuit rating : 80kA rms for 1 sec

6.1.3.2 Off-Circui t Tap Changer

A manually operated off-circuit tap changer shall be provided.

Off-circuit tap changer shall be externally, manually operated by operating handle suitable for

operation without the need for any tools. This shall be located outside of the transformer

enclosure and in an easily accessible position.


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The off-circuit tap changer shall meet the following requirement;

The tapping range shall be 5% in 2.5% steps.

The tapping switch shall be positively located in each tap position and shall be lockable only

in those positions. The operating handle shall be provided with padlock facilities to lock the

tap changer in each position.

Mechanical end stops shall be provided.

The operating handle shall be metal and sized to allow operation without the need for any

tools. It shall be located in a directly accessible position (i.e. not requiring the removal of any

covers).

Tap positions shall be clearly marked in line with the data given on the rating plate.

One handle shall operate all phases simultaneously.

6.1.3.3 Core Construct ion

All steel parts of the clamping structure other than stainless steel parts shall be painted.

All parts of the core shall be of robust design capable of withstanding mechanical shocks.

The bracing of core and winding assembly shall be adequate to prevent any movement

relative to transformer housing assembly during lifting, shipping and transportation and

handling.

All parts of core, frame etc. shall be maintained at earth potential.

6.1.3.4 Thermistor Thermal Protection

One set of PTC (positive temperature coefficient) type thermistor temperature sensors or Pt

100 resistance type temperature detectors shall be installed in the LV windings with one

sensor per phase winding for temperature monitoring. Necessary monitoring system shall be

provided. The scheme shall provide indications, alarms and trip facilities on high temperature.

The monitoring devices shall be located outside of the transformer enclosure.

The thermistors shall be designed and located in such a manner as to avoid transfer of over-

voltage to auxiliary or external connections.

The leads of the thermistors shall be brought out to a control box located on the outside of

the transformer enclosure.

The first set of sensors shall be used for control of high temperature warning. One N/O and

one N/C volt-free contact shall be provided for connection to an external alarm circuit.

The second set of sensors shall be used for tripping the transformer secondary supply

(460VAC switchgear incoming ACB). One N/O and one N/C volt-free contact shall be

provided for connection to an external tripping circuit.

Temperature control of cooling fans shall also be provided to start fan automatically when

required.


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6.1.3.5 Anti -Condensation Heaters

The CONTRACTOR shall provide thermostatically controlled, anti-condensation heaters to be

installed in the transformer enclosure or places where condensation can be expected due to

the environmental conditions. The heater power supply shall be supplied from external

source of 220V AC, 2 phase. The heating system shall be separately protected and switched

for isolation purposes by means of a miniature circuit breaker.

6.1.3.6 HV Cable Connection Box

Terminals shall be clearly marked to identify the phase connections in accordance with the

connection diagram on the rating plate.

HV terminals shall be coloured coded. Colour coding for phase identification shall be as

follows:

Phase L1 = Black

Phase L2 = Brown

Phase L3 = Grey

The main primary cable entry shall be from bottom. Necessary fixings as may be required for

supporting cables shall be provided.

A removable, undrilled gland plate shall be provided at the box suitable for termination of the

incoming cable from the bottom. Ample space shall be provided within the box for termination

of HV cable complete with its terminating kits and stress relief devices as applicable.

Earthing terminals shall be provided for permanent earthing of cable armour etc and for

temporary earthing of windings.

The cable connection box and the undrilled gland plate shall be of non-ferromagnetic type.

All terminals shall be suitable for connection of copper conductors, LSZH type, steel wire

armoured (SWA), XLPE or EPR insulated.

6.1.3.7 LV Terminal Box



LV terminals shall be coloured coded. Colour coding for phase identification shall be as

follows.

Phase L1 = Black

Phase L2 = Brown

Phase L3 = Grey



The LV terminal box shall be suitable for bus duct connection. The bus duct entry has yet to

be determined. CONTRACTOR shall liaise with bus duct CONTRACTOR to obtain entry

details.


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Live parts shall be shrouded / insulated.

6.1.3.8 Contro l Terminations

Wiring from transformer accessories shall be terminated in a terminal box mounted on theside of the transformer tank with IP56 degree of ingress protection (IEC 60529).

The box shall be complete with rail barrier type terminals suitable for ring lugs. All control

wires, including spares, shall be connected to the terminals.

A separate control terminal box shall be provided for each of the following systems

Current transformers

Fan controls

Other controls

Intrinsically safe controls

When cooling fans are provided, the temperature indication devices and fully automatic

control equipment for the forced air (fan) cooling of the windings including control units,

relays, alarms and trips, shall be provided. Manual control of fans shall also be provided for

maintenance purposes. The control equipment shall be located in the control cabinet.

Volt-free signal contacts, rated 10A at 220V AC and 1A at 24V DC shall be provided for use

as follows:

One set of contacts for common winding temperature pre-alarm.

One set of contacts for common winding temperature trip.

One set of contacts for fans running (if applicable).

One set of contacts for common fault.

Trip, alarm and start fans settings shall be separate and adjustable when cooling fans are

provided.

6.1.3.9 Frame Earthing

Two earthing bosses of M12 shall be provided at diametrically opposite corners of the

transformer base for external earthing connection.

6.1.3.10 Bi-Directional Rollers

The stainless steel transformer enclosure shall be equipped with a heavy duty, rigid steel

base fitted with bi-directional rollers.

The steel bases shall have provision at all four corners for bolting the transformers to the

steel deck.

6.1.4 Other Accessor ies

The transformer enclosure shall be equipped with lifting facilities.


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6.1.5 Noise

Noise prediction calculation and testing to be in accordance to relevant section of IEC 60534-

8-3 or IEC 60534-8-4.

The noise generated by a transformer installation in indoor area shall not be greater than 60

dBA measured at 1 metre under all operating conditions.

6.2 MATERIALS

Material selection shall be as per CONTRACTOR standard but suitable for this application

and site condition. Aluminium shall not be used for any part of the Transformer.

6.3 DESIGNATION AND NAMEPLATE

6.3.1 Designation

The equipment and components are designated according to the COMPANYs systems and

equipment numbering & tagging. CONTRACTOR shall use the designated numbering if it is

already specified in the Data Sheets/single line diagrams. Where it is not clearly specified,

CONTRACTOR shall follow COMPANYs Guidelines for Equipment Numbering.

6.3.2 Name Plates

The CONTRACTOR shall, at a minimum, provide the following:

One (1) main nameplate per package/skid

One (1) nameplate per equipment within the package/skid

Name plates shall adequately mark the components and shall indicate the following:

Component designation (name and tag number)

Type and size/capacity/ratings

Technical data applicable as per relevant IEC

Design data and applicable codes

Manufacturers name and address

Year of manufacture

ABS/3rd party approvals

Vector symbol

Maximum temperature rise

Design ambient temperature

Tapping arrangements

Primary voltage and current

Secondary voltage and current

Percentage impedances


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Insulation level

Connection diagram

Total weight


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7. INSPECTION AND TESTING

Inspection and testing requirement shall be in accordance with the applicable datasheets,

specifications, codes and standards.

All testing shall be carried out at the manufacturers test facility. The test equipment shall be

supplied by the manufacturer and shall be calibrated within six month of the test date.

CONTRACTOR shall include an Inspection and Test Plan (ITP) in their Tender documents.

The ITP shall list all inspections and tests proposed for the equipment by the

CONTRACTOR, between the date of ordering and the date of delivery. The plan will be

reviewed and approved to become the approved Inspection and Test Plan for the Project and

form part of the contract documents.

The CONTRACTOR shall be responsible for the planning and execution of all inspections

and tests, but the COMPANYs representative shall have the right to witness any or all of the

manufacturing, inspection or tests.

The CONTRACTOR shall notify the COMPANY, at least fourteen (14) days in advance, of

the date on which any of the inspections or tests nominated as Hold or Witness points on the

ITP are due to be carried out.

Certificates of Test shall be provided for each item of equipment to prove it has been

satisfactorily tested to meet all requirements of its appropriate manufacturing standards,

whether or not witnessed by the COMPANY.

Where appropriate, test certificates shall state values for all test results. Tests for which the

results are indicated as pass or fail shall be qualified by the relevant acceptance criteria.

7.1 TYPE TEST

Type Tests shall be carried out with supervision and certification by a recognized testing

authority. The tests shall comply with the requirements of IEC 60076-10. All tests may be

witnessed by an Inspection Agency and / or COMPANYs representative.

On completion of tests and before dispatch of the transformers from the CONTRACTORs

works, the CONTRACTOR shall supply a full set of test documents to the COMPANY. The

test documents shall include, but not be limited to, all of the test data for the following Type

Tests:

Temperature rise test (one unit of each rating)

Dielectric type tests

Lightning Impulse test (where the standard allows the choice of two impulse levels, these

tests shall be at the lower level)

Measurement of zero sequence impedances

Measurement of sound levels


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Where previous type testing has been completed on equipment of identical design, type test

documentation may be submitted in lieu of performing each of the listed type tests.

7.2 ROUTINE TEST

Prior to delivery, each transformer shall undergo the following routine tests and checks. Tests

shall comply with the requirements of IEC 60076-10. All tests may be witnessed by an

Inspection Agency and / or COMPANYs representative. Full written test reports shall be

submitted to the COMPANY on completion of the tests.

Measurement of winding resistance.

Measurement of voltage ratio (on all taps) and check of voltage vector relationship and

phase displacement.

Measurement of impedance voltage (principle tapping), short circuit impedance and load

loss.

Measurement of no-load loss and current.

Separate source voltage withstand test.

Load losses and impedance voltage measurement

Induced over-voltage withstand test.

Partial discharge tests.

Measurement of insulation resistance to earth of the windings. Measurement of noise levels at full load.

Verification of all protection devices.

Visual inspection of overall finish, painting, welds, metal works, lifting lugs, terminal

fastening, insulation, terminations, fixings, etc.

Dimensional checks mounting, terminals, leakage paths, centre lines, overall

dimensions and weight.

Check of transformer auxiliaries and accessories against specification requirements

including function testing. Check of the rating plate, nameplate, additional markings and

labels.


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8. APPENDICES

APPENDIX A : EQUIPMENT DATA SHEET


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8.1 APPENDIX A: EQUIPMENT DATA SHEET

CONTRACTOR to fill in the attached data sheet and submit with the technical proposal.

No. Description COMPANYs Doc. No.

1 6.6kV/0.46kV Transformer Data Sheet 21022-BAE-77500-EL-DS-1001