EP 16 00 00 01 SP - Pole Mounted Distribution Transformer · EL0003000 33 kV / 415 V 3 phase...

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018

POLE MOUNTED DISTRIBUTION TRANSFORMER

EP 16 00 00 01 SP

Engineering Specification Electrical

Engi

neer

ing

Spec

ifica

tion

Version 3.1

Issued November 2012

Owner: Chief Engineer Electrical

Approved by:

Neal Hook Chief Engineer Electrical

Authorised by:

Neal Hook Chief Engineer Electrical

Disclaimer This document was prepared for use on the RailCorp Network only. RailCorp makes no warranties, express or implied, that compliance with the contents of this document shall be sufficient to ensure safe systems or work or operation. It is the document user’s sole responsibility to ensure that the copy of the document it is viewing is the current version of the document as in use by RailCorp. RailCorp accepts no liability whatsoever in relation to the use of this document by any party, and RailCorp excludes any liability which arises in any manner by the use of this document. Copyright The information in this document is protected by Copyright and no part of this document may be reproduced, altered, stored or transmitted by any person without the prior consent of RailCorp.

UNCONTROLLED WHEN PRINTED of 19

RailCorp Engineering Specification — Electrical Pole Mounted Distribution Transformer EP 16 00 00 01 SP

© RailCorp of 19 Issued November 2012 UNCONTROLLED WHEN PRINTED Version 3.1 S

uper

sede

d by

T H

R E

L 16

001

SP

v1.

0, 1

6/05

/201

8Document control

Version Date Summary of change 2.0 May 2010 Application of TMA 400 format 3.0 May 2011

Technical Review

General Formatting

Additional sub sections for Technical Characteristics

Updating section - Reliability, Availability and Maintainability

Updating section – Tests

New Section Quality Management System

New Appendix – Request For Tender Checklist 3.1 November 2012

Add Appendix C "Requirements for Technical Aspects of Tender Evaluation


© RailCorp of 19 Issued November 2012 UNCONTROLLED WHEN PRINTED Version 3.1

Contents

1 Introduction .............................................................................................................................5 2 References...............................................................................................................................5 2.1 Australian Standards.................................................................................................................5 2.2 RailCorp Documents .................................................................................................................6 2.3 Drawings ...................................................................................................................................6 3 Definitions & Abbreviations...................................................................................................6 4 Functional Characteristics.....................................................................................................7 4.1 General......................................................................................................................................7 4.2 Whole-of-Life Cost ....................................................................................................................7 5 Performance Characteristics .................................................................................................8 5.1 Rated insulation level ................................................................................................................8 5.2 Minimum Energy Performance Standards (MEPS) ..................................................................9 6 Technical Characteristics.......................................................................................................9 6.1 Construction ..............................................................................................................................9 6.2 Rating Plate...............................................................................................................................9 6.3 Terminal Arrangement ..............................................................................................................9 6.4 Earth Terminal...........................................................................................................................9 6.5 Unearthed Secondary .............................................................................................................10 6.6 Lifting Attachments..................................................................................................................10 6.7 Hangers...................................................................................................................................10 6.8 Temperature-Rise Limits.........................................................................................................10 6.9 Finish.......................................................................................................................................10 6.10 Colour......................................................................................................................................10 6.11 Marking....................................................................................................................................11 6.12 Environment ............................................................................................................................11 6.13 Sound Level ............................................................................................................................11 6.14 Radio Interference...................................................................................................................11 6.15 Insulating Oil ...........................................................................................................................11 7 Reliability, Availability and Maintainability.........................................................................11 7.1 RAM Targets ...........................................................................................................................11 7.2 RAM Requirements.................................................................................................................12 7.3 Maintenance............................................................................................................................12

7.3.1 Oil Testing................................................................................................................12 8 Tests.......................................................................................................................................13 8.1 Type Tests ..............................................................................................................................13 8.2 Routine Tests ..........................................................................................................................13 9 Quality Management System ...............................................................................................13 9.1 Supplier’s Accreditation...........................................................................................................13 9.2 Inspection and Test Plan.........................................................................................................14 10 Data Set associated with the Equipment............................................................................14 10.1 Equipment Manuals ................................................................................................................14 10.2 Test Results ............................................................................................................................14

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018



10.3 Life Cycle Costing ...................................................................................................................14 10.4 Technical Schedule.................................................................................................................14 Appendix A Technical Schedule ...............................................................................................15 Appendix B Request For Tender Checklist..............................................................................18 Appendix C Requirements for Technical Aspects of Tender Evaluation .............................19

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018



1 Introduction This document details the whole of life performance requirements for the purchase and maintenance of 2 and 3 phase pole mounted distribution transformers for use in the RailCorp electrical network. It covers primary voltages of 11 kV and 33 kV and secondary voltages of 125 V, 250 V and 433 V. The standard RailCorp pole mounted substation designs allow for a weight limit of 2240 kg. The standard design is based on oil-immersed transformers..

This document does not cover transformers used on the 2 kV network as it is in the process of being phased out. Any replacement transformers should be sourced from decommissioned stock.

Additional 33kV pole mounted transformers are not permitted in the RailCorp network and this document can only be used for the replacement of existing 33kV pole mounted transformers.

The requirements of this document apply to all new pole mounted distribution transformers.

2 References

2.1 Australian Standards The following Australian Standards are either referenced in this document or can provide further information.

AS 1627.4 Metal finishing - Preparation and pre-treatment of surfaces - Abrasive blast cleaning.

AS 1767.1 Insulating liquids - Specification for unused minerals insulating oils for transformers and switchgear.

AS 2374.1.2 Power Transformers Part 1.2: Minimum Energy Performance Standard (MEPS) requirements for distribution transformers

AS 2374.2 Power transformers Part 2: Temperature rise AS 2374.5 Power transformers Part 5: Ability to withstand short-circuit.

AS 2700 Colour standards for general purposes AS 4680 Hot-dip galvanized (zinc) coatings on fabricated ferrous articles

AS 60076.1 Power transformers – General AS/NZS 2344 Limits of electromagnetic interference from overhead a.c.

powerlines and high voltage equipment installations in the frequency range 0.15 to 1000 MHz

AS/NZS 60076.3 Power transformers - Insulation levels, dielectric tests and external clearances in air.

AS/NZS 60076.10 Power transformers - Determination of sound levels. AS/NZS 60137 Insulated bushings for alternating voltages above 1000 V AS/NZS ISO 9001 Quality management systems - Requirements

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018

http://www.saiglobal.com/online/Script/Details.asp?DocN=AS0733789706AT



2.2 RailCorp Documents EP 02 00 00 01 SP Transformer Loss Evaluation EP 00 00 00 13 SP Electrical Power Equipment - Design Ranges of Ambient

Conditions

EP 00 00 00 15 SP Common Requirements for Electrical Power Equipment

2.3 Drawings The following drawings form part of this document:

EL0037164 Train signalling. 11 kV / 120 V transformers. Single pole structure details. EL0025111 Substations 11 kV / 433 V transformer single pole structure, transformer mounting details. EL0003000 33 kV / 415 V 3 phase transformer single pole structure arrangement. The following drawings can provide further information: EL0037020 Train signalling 11 kV / 120 V transformer. Single pole structure arrangement. EL0025064 11 kV / 415 V transformer. Single pole structure arrangement. EL0008273 33 kV / 500-250 V transformer single pole structure arrangement. EL0008409 33 kV / 500-250 V transformer single pole structure operating notice. EL00002969 11 kV / 500-250 V transformer single pole structure and 11 kV switchgear arrangement. EL0003001 Frame assembly for 3 phase 36 kV 300 A sidebreak isolator - dual earth switch and fuse combination. EL0000930 Earthing arrangement substation on timber pole with low voltage earthed. EL0000931 Earthing arrangement substation on timber pole with low voltage unearthed.

3 Definitions & Abbreviations For the purpose of this specification the definitions given in AS 60076 apply. In addition the following definitions also apply:

2 phase system Where the secondary of a transformer is a two wire system, that is it has a voltage of 250 V or 125 V, then the primary winding of the transformer is connected across two phases of the high voltage system.

Distribution Transformer A transformer that transforms and controls the system voltages to a secondary voltage of nominally 415 V, 240 V or 120 V.

NB Normal bore (of pipe)

ONAN Oil Natural, Air Natural cooling. The transformer windings and core are oil cooled and the oil is air cooled, without the use of pumps or fans.

Pole mounted Mounted on a structure supporting an overhead line.

Primary winding The winding that receives the active power from the supply system, usually the winding having the highest rated voltage.

Principal tapping Is the tapping to which the rated quantities are related.

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018

http://engintranet.railcorp.nsw.gov.au/disciplines/Electrical/Electrical%20Power%20Equipment%20-%20Design%20Ranges%20of%20Ambient%20Conditions.PDF

http://engintranet.railcorp.nsw.gov.au/disciplines/Electrical/Electrical%20Power%20Equipment%20-%20Design%20Ranges%20of%20Ambient%20Conditions.PDF

http://engintranet.railcorp.nsw.gov.au/disciplines/Electrical/Common%20Requirements%20for%20Electrical%20Power%20Equipment.PDF



Secondary winding The winding that delivers the active power to the load circuit, usually the winding having the lowest rated voltage.

4 Functional Characteristics

4.1 General Pole mounted substations are used on RailCorp’s 11 kV and 33 kV distribution networks in the area bounded by Muswellbrook (north), Kiama (south) and Wallerawang (west).

The transformers covered by this document supply railway stations, signals, workshops and various other AC loads. They are not used for supplying DC traction loads.

The transformers shall be in accordance with AS 60076, except as detailed in this document.

4.2 Whole-of-Life Cost The selection of the most suitable transformer shall be made on the basis of minimizing the whole-of-life cost. The following factors must be considered in determining this:-

• Initial purchase price. • Cost of changes to the Technical Maintenance Plan & Service Schedules or the

creation of new manuals & schedules. • Cost of manuals. • Cost of maintenance. • Cost of replacement parts. • Cost of inventory spares. • Environmental costs. • Electrical Losses. Refer to document EP 02 00 00 01 SP - “Transformer Loss

Evaluation” for the method of evaluating transformer losses. • Cost of installation. • Reliability and cost of failures. • Cost of modifications to other parts of the installation. • Lifetime of equipment. • Discount Rate. • Cost of staff training. • Cost of Decommissioning and Disposal. • Cost of special tools. • Cost of changes and management of drawings.

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018



5 Performance Characteristics Technical Parameter 11 kV Transformers 33 kV Transformers

Applicable standards AS 60076 AS 60076 Transformer type Outdoor, pole mounted Outdoor, pole mounted No. of winding Two winding Two winding No. of phases 2 (ph to ph) or 3 phase 2 (ph to ph) or 3 phase

Rated voltage HV winding 11,000 Volts (ph – ph) 33,000 (ph – ph)

LV winding 250 V or 125 V for 2 phase 433 V for 3 phase

250 – 125 V 433 V for 3 phase

No load ratio 11,000/125 V phase-phase 11,000/250 V phase-phase 11, 000/433 V 3 phase

33,000/125 V phase-phase 33,000/250 V phase-phase 33, 000/433 V 3 phase

Frequency 50 Hz 50 Hz Rated power (preferred ratings, other sizes subject to RailCorp’s approval)

1 phase: 25 kVA 3 phase: 75, 200 kVA

1 phase: 25 kVA 3 phase: 75, 200 kVA

Neutral terminal

Star point or neutral of lower voltage winding shall be connected to a bushing and fully insulated from earth.

Star point or neutral of lower voltage winding shall be connected to a bushing and fully insulated from earth.

System earthing Non-effectively earthed Non-effectively earthed Type of Cooling ONAN ONAN Vector Group Dyn1 Dyn1

Impedance voltage 3.3% for 25 kVA 4% for 75, 200 kVA

3.3% for 25 kVA 4% for 75, 200 kVA

Taps, on HV windings through externally operated off-circuit switches, capable of being locked in position.

± 2.5%, 0% and ± 5% ± 2.5%, 0% and ± 5%

Min sound power level As per AS 60076 As per AS 60076

Temperature rise limits Winding: 65 deg C Top oil: 60 deg C

Winding: 65 deg C Top oil: 60 deg C

Max weight, including oil 2240 kg 2240 kg

Table 1 - Performance Characteristics

5.1 Rated insulation level Rated Voltage System Highest Voltage Rated Insulation Level

Lightning Impulse

Power Frequency

125 - 433 Vrms 1.1 kVrms - 5 kVrms 11 kVrms 12 kVrms 95 kVpk 28 kVrms 33 kVrms 36 kVrms 200 kVpk 70 kVrms

Table 2 - Rated insulation level

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018



5.2 Minimum Energy Performance Standards (MEPS) The distribution transformer shall meet the minimum power requirements for transformer efficiency at 50% load as specified in AS 2374.1.2 Table 1.

The following table provide power efficiency levels for RailCorp standard sizes calculated by linear interpolation as per AS 2374.1.2.

Minimum power efficiency @ 50% load (MEPS) 25kVA 75kVA 200kVA 98.70% 98.67% 98.94%

Table 3 - RailCorp power efficiency levels

6 Technical Characteristics

6.1 Construction A sealed transformer design shall be used. The space above the oil shall be filled with inert gas or dry air. The gland for the tap changer switch shall be located below cold oil level. The tank cover and bracing shall be designed to prevent the accumulation of water.

6.2 Rating Plate The rating plate shall meet the requirements of AS 60076.1, Section 7, and shall include a diagram of connections. A terminal marking plate complying with the requirements of AS 60076.1, Section ZB7, shall also be attached to the transformer. The plates shall not be attached to a removable cover.

6.3 Terminal Arrangement The position of the primary winding terminal bushings shall be on the side of the transformer remote from the pole. The position of the secondary winding terminal bushings shall be on the left hand end of the transformer as viewed from the side containing the primary winding bushings. The bushings shall comply with AS/NZS 60137 for normally polluted atmosphere.

For connections using lugs or terminals not insulated to the appropriate voltage, the following minimum clearances shall apply:

33 kV terminals: Between different phases 460 mm Between phase and earthed metal 380 mm 11 kV terminals: Between different phases 185 mm Between phase and earthed metal 160 mm 415 / 433 V terminals: Between different phases 110 mm Between phase and earthed metal 60 mm 125 / 250 V terminals: Between different phases 70 mm Between phase and earthed metal 60 mm

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018

6.4 Earth Terminal A suitable earthing terminal shall be located near the bottom of the tank.



6.5 Unearthed Secondary Transformers used solely for supplying unearthed installations, such as signalling locations, shall be provided with a copper or aluminium metal screen located between the primary and secondary windings. The screen shall be at least 0.5 mm in thickness and is to be connected to a special insulated terminal. The metal screen shall be arranged to prevent leakage from any part of the primary windings to any part of the secondary windings of the transformers.

The manufacturer must be made aware that the secondary side of the transformer is not earthed under normal service conditions so that over voltages due to the capacitances between windings and between windings and earth can be allowed for in the transformer design.

6.6 Lifting Attachments Suitable lifting lugs shall be provided for lifting the transformer.

6.7 Hangers If a transformer is a replacement for an existing pole mounted substation, and it is required that the transformer be physically interchangeable, then the bracket and hanger designs shown on the drawings that form part of this document may be used. Refer to drawing list in Section 2.3.

6.8 Temperature-Rise Limits The transformer shall be capable of continuous operation at rated power without exceeding the maximum temperature-rise limits as specified in AS 2374.2 Section 4.2.

6.9 Finish All internal and external surfaces shall be treated with a coating that provides protection against corrosion caused by water such as hot dipped galvanising. Protective coating on the interior of the transformer tank shall not react with the insulating oil or its additives.

All welds shall be made smooth, rough edges rounded and weld splatter removed. The transformer tank and cover shall remain corrosion free for the life of the transformer. The internal and external surfaces shall be prepared and the paint applied strictly in accordance with the manufacturer’s instructions.

When an existing transformer suffers damage to its finish the repair shall be to the original standard of finish.

6.10 Colour Painting of the transformer external surfaces shall be as per Section 4.2.2 of RailCorp Standard EP 00 00 00 15 SP.

Outside surface of the transformer shall be painted storm grey, colour No. 42 to AS 2700.

Deviation from RailCorp Standard requirements may be accepted subject to RailCorp Engineering approval.

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018



6.11 Marking Marking and labelling of the transformer shall be as per the requirements of Section 4.9 of RailCorp Standard EP 00 00 00 15 SP.

6.12 Environment The installation ambient air temperature shall be: -5°C to 40°C as per the requirements of Section 3.2 of RailCorp Standard EP 00 00 00 13 SP.

The installation may be located in close proximity to railway tracks that is subject to significant dust and dirt ingress. The transformer shall not be adversely affected when operating under these environments.

6.13 Sound Level The transformer sound level shall be measured in accordance with AS/NZS 60076.10 and shall comply with the “Standard limit” as per Annex ZA of AS/NZS 60076.10.

6.14 Radio Interference The transformer shall comply with the limits of radio interference as specified in Table B1 of AS/NZS 2344. For 11kV the interference limit is 17 μV/m and 33kV the interference limit is 26 μV/m.

6.15 Insulating Oil Insulating oil shall comply with the requirements of AS 1767.1.

Insulating oil used in the transformer shall be mineral based, inhibited class-1 grade naphthenic oil. New or regenerated oil used in the transformer shall not contain any carcinogenic substances.

The transformer shall not have a moisture content of greater than 10ppm prior to the filling of oil. Oil shall be filled under vacuum to minimise ingress of moisture.

In order to comply with NSW Environment Protection Agency guidelines for PCB free materials the transformer oil must contain less than 2 milligrams per kilogram of PCB. After the transformer has been delivered to site and any oil added, as may be necessary, the suppliers shall arrange for the oil to be tested for PCB content and a certificate issued to the Purchaser showing the PCB content. Should the PCB content exceed 2.0 mg/kg then the suppliers shall arrange for the oil to be “treated” as necessary to reduce the PCB level below 2 mg/kg.

7 Reliability, Availability and Maintainability

7.1 RAM Targets Reliability, availability and maintainability targets shall be specified by RailCorp to RailCorp Engineering Procedure EPD 0009 on a project to project basis.

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018



7.2 RAM Requirements The transformer shall exhibit a high level of reliability, consistent with the achievement of availability targets specified for the equipment. Manufacturers shall provide details of reliability claimed for each major element of the transformer in the specified operating environment including the source of reliability data. If claimed reliability performance is based on calculation, the basis and methodology for the calculation should be quoted. If based on actual field operating performance, the source of the data, including details of the installation and, where possible, methods of verification should be provided.

Reliability performance is to be expressed in the form of a mean time between failure (MTBF), where a failure is defined as a condition which will prevent the item performing its intended primary functions.

Manufacturers are to also to provide information on specific maintainability features included in the design and are to provide typical and average times needed to replace major replaceable items (including test where necessary) and to perform routine inspection and replacement of consumable items.

Estimates should include a clear statement about whether the mean time to repair (MTTR) quoted include any allowance for response times and waiting times to obtain suitable spares and other equipment necessary for the task.

7.3 Maintenance The relevant RailCorp Technical Maintenance Plans shall be adhered to for the maintenance of the type of transformer. Where a new type of transformer is purchased and installed that is not covered by the TMP then a new service schedule shall be created and the TMP updated. This shall include:

• The “Maintenance Policy”, defining the practical means of maintaining the equipment.

• The tasks to be performed at each level of maintenance and staff skill levels required.

• Test equipment and tools.

It is preferable that the period for routine maintenance shall not be more frequent than for the types of transformers currently detailed in the RailCorp Technical Maintenance Plan.

7.3.1 Oil Testing No field oil testing is carried out on transformers, under 100 kVA and transformers with a primary voltage of 2 kV.

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018



8 Tests

8.1 Type Tests The following type tests shall be performed on the transformer. Type test certificates of the performed tests shall be provided by the manufacturer.

• Short circuit test1 to AS 2374.5 • Temperature rise test to AS 2374.2 • Impulse voltage withstand test to AS 60076.4 • Sound level test to AS/NZS 60076.10 • Partial discharge test to AS/NZS 60076.3

RailCorp may accept type test certificates that have been previously conducted on similar transformers.

8.2 Routine Tests The following routine tests shall be carried out on each transformer supplied to RailCorp. RailCorp reserves the right to witness the tests.

• Measurement of winding resistance to AS 60076.1 • Measurement of voltage ratio and check of phase displacement to AS 60076.1 • Measurement of short circuit impedance and load loss to AS 60076.1 • Measurement of no-load loss and current to AS 60076.1 • Induced over voltage withstand to AS/NZS 60076.3 • Separate source voltage withstand to AS/NZS 60076.3 • Insulation resistance to AS/NZS 60076.3 • Oil test described in Section 6.14 of this specification

Relevant tests listed in Section 6.2 of RailCorp Standard EP 00 00 00 15 SP shall also be performed on the transformer.

9 Quality Management System

9.1 Supplier’s Accreditation The Supplier must have obtained accreditation to AS/NZS ISO 9001 or other relevant standard from a recognised authority for its manufacturing procedures and quality management systems. These procedures and systems shall be applied to manufacture and testing of each transformer.

Details of quality management certificates held shall be provided with the Tender including the accreditation authority, document registration number and year.

The quality management documentation shall be made available for review by RailCorp if requested during tender evaluation.

1 RailCorp may accept calculations that prove that the transformer design is capable of withstanding short circuit conditions.

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018



9.2 Inspection and Test Plan RailCorp shall have the right to make inspections during the manufacturing period and to witness works testing.

A draft Inspection and Test Plan (ITP) and associated Inspection and Test Checklist (ITC) shall be submitted with tenders for assessment. The ITP must nominate hold points for witness tests and inspections by RailCorp.

Manufacture shall proceed according to an agreed version of the ITP and ITC negotiated prior to awarding the contract.

10 Data Set associated with the Equipment The following data shall be maintained for each transformer. This data shall be the property of RailCorp and maintained by the Maintenance Provider responsible for the installation in which the transformer is installed.

10.1 Equipment Manuals The Equipment Manuals must be provided for the installation and shall include full instructions for the preventative, surveillance and corrective maintenance, comprehensive fault diagnosis, rectification procedures and staff training requirements. It shall include all drawings needed for the above. All drawings shall show sufficient detail to enable satisfactory maintenance of the equipment.

10.2 Test Results The results of all tests relating to the transformer and the insulating oil, including acceptance tests and periodic and corrective maintenance tests, shall be recorded.

10.3 Life Cycle Costing All the data and assumptions pertaining to the determination of the whole-of-life cost calculations shall be recorded.

10.4 Technical Schedule The information listed in the attached Technical Schedule shall be maintained for each transformer.

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018



Appendix A Technical Schedule Manufacturer .………………............. Serial number .………………............. Year of manufacture .………………............. Oil preservation system (refer to AS60076.1 Section 8.2) .……………….............

Number of phases .……………….............

Rated primary voltage .………………............. V

Rated secondary voltage .………………............. V

Rated power .………………............. kVA

Rated input frequency .………………............. Hz

Rated input current .………………............. A

Rated output current .………………............. A

Inrush current A .………………............. Connection vector symbol .……………….............

Efficiency .……………….............

Input power factor .……………….............

Input current distortion at rated input current .………………............. % THD

Total output voltage distortion .………………............. % THD

Short circuit capability .……………….............

Overload capability .……………….............

Maximum temperature rise of windings .………………............. °C

Impedance voltage at rated current and 75°C/115°C* (Expressed as percentage of rated voltage) .……………….............

%

No-load current with rated voltage applied to the principal tapping (Expressed as percentage of rated current) .……………….............

%

No-load current with 110% of rated voltage applied to the principal tapping. (Expressed as percentage of rated current) .……………….............

%

No-load loss W .………………............. Load loss W .………………............. Type of core steel - hot or cold rolled .……………….............

Brand or trade name and grade of core steel .……………….............

Flux density based on net cross-section of steel with rated voltage at rated frequency applied to the principal tapping

− Limbs T .………………............. − Yoke T .……………….............

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018


Mass of windings only .………………............. kg

Mass of one transformer core and winding only .………………............. kg

Mass of one transformer, complete with oil .………………............. kg

Is a screen between primary and secondary windings provided Yes/No

Screen material .………………............. Cu/Al

Screen wire size .………………............. sq.mm

Lay factor .……………….............

Is screen brought out to an insulated terminal outside of the transformer Yes/No

.………………............. Size of wire used to connect screen to the terminal .………………............. sq.mm

Volume of oil required to fill one transformer .………………............. Litres

Sound level dBA .………………............. Voltage withstand test which the bushings will withstand without puncture or flashover in accordance with Section 7.2.1 and Table 7 of AS/NZS 60137.

Primary Bushings − Lightning impulse withstand voltage .………………............. kVp

− Power frequency withstand voltage .………………............. kVrms

Secondary Bushings

− Lightning impulse withstand voltage(if required) .………………............. kVp

− Power frequency withstand voltage .………………............. kVrms

Bushings, minimum clearance in air:

Primary Secondary

− between phases mm .………………............. .………………............. mm

− phase to earth mm .………………............. .………………............. mm

Is heat-shrink material provided on the higher volt terminals? .………………............. Yes/No

Type of insulating material used for windings .……………….............

Type of material used for windings - copper or aluminium .……………….............

Temperature class of insulation .……………….............

Insulating liquid (oil/synthetic) .……………….............

Overall transformer dimensions:

− Length .………………............. mm

− Width mm .………………............. − Height .………………............. mm

© RailCorp of 19 Issued November 2012 UNCONTROLLED WHEN PRINTED Version 3.1 S

uper

sede

d by

T H

R E

L 16

001

SP

v1.

0, 1

6/05

/201

8



Protective treatment applied to:

− Internal surfaces .………………............. − External surfaces .……………….............

Mean time between failures .………………............. Mean time to repair .……………….............

Availability / uptime .……………….............

Failure modes .………………............. Critical components / spare parts .……………….............

Other relevant information .………………............. Departures from Specification

Are there any departures from the requirements of this Specification .………………............. Yes/No

Departures from the requirements of this Specification must be highlighted.

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018



Appendix B Request For Tender Checklist Information to be supplied to tenderers

The following information shall be provided to tenderers

• Input voltage • Output voltage • Rated power • Number of phases • Purpose of the transformer – distribution, signalling power or others • Requirement of a screen between primary and secondary windings (required for

transformers to be used for signalling supplies or other unearthed secondary usage)

• Delivery location • Delivery date • Special transport or unloading requirements • Special installation requirements • Reliability, availability and maintainability targets • A statement stipulating that type testing, routine testing and site testing will be at

the suppliers cost and that the purchaser reserves the right to witness tests carried out

• A statement stipulating that the purchaser reserves the right to inspect the transformer at any time during the manufacturing process

Information to be supplied by tenderers

The following information shall be provided by tenderers:

• Completed Technical Schedules (see Appendix A) • Technical catalogues of all equipment tendered • Complete Bill of Materials • Schematics and physical cross sectional drawings of the proposal • Requirement of a screen between primary and secondary windings complied with

or not. • Type test certificates • Details of manufacturers’ quality management system • Proposed delivery schedule • Information associated with reliability, availability and maintainability (see Section

7.2 of this specification) • Data set associated with the equipment (see Section 10 of this specification) • List of emergency spares that should be stocked by RailCorp • Reference list where similar equipment has been installed and is under satisfactory

operation for the past two years as a minimum • Whole of Life Cost – Selection of the transformer shall be made on the basis of

whole of life cost as per Section 4.2 of this specification. Tenderers are required to provide all necessary information as required by RailCorp to estimate the whole of life cost.

Information to be supplied by the successful tenderer

Test Certificates

Copies of certified test certificates covering type tests and routine tests shall be provided prior to delivery of the transformer.

Transformer Manuals

The successful tenderer shall provide installation, user operation and maintenance manuals. Refer to Section 10 of this specification.

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018



Appendix C Requirements for Technical Aspects of Tender Evaluation

Evaluation of tenders

The Chief Engineer Electrical requires that persons evaluating the technical aspects of this tender have sufficient technical competence for the task.

Tender evaluation committees shall forward details of persons evaluating the technical aspects of the tender to the Chief Engineer Electrical for concurrence. This will normally be in the form of an email and is to include sufficient detail of the tender and the person to enable the Chief Engineer Electrical to satisfy themself of the merits of the evaluating person. A minimum of 4 weeks notice is required prior to the evaluation of the Tenders.

The Chief Engineer Electrical will advise only if the person is considered unsuitable for the technical evaluation.

Acceptance of product

A number of the specifications require acceptance of product at both the factory and at site. The purchaser is to advise the Chief Engineer Electrical the details of the person carrying out the acceptance testing for the concurrence of the Chief Engineer Electrical. A minimum of 4 weeks notice is required prior to the evaluation of the acceptance testing.

The Chief Engineer Electrical will advise only if the person is considered unsuitable for the acceptance testing.

The Chief Engineer Electrical reserves the right to nominate a representative to review and/or attend such acceptance.

Record Keeping

Where product is purchased against this specification, the Chief Engineer Electrical requires that relevant detail be provided so that it can be logged against this specification.

For RailCorp purchases, the tender evaluation committee shall advise the Chief Engineer Electrical the RailCorp registered file details containing the tender evaluation for future referencing. This is normally a TRIM reference.

Where this specification is utilised by parties external to RailCorp (Alliance parties, etc) then copies of all relevant technical information and evaluation shall be forwarded to the Chief Engineer Electrical for filing against the specification. In addition copies of selected commercial information pertaining to the ongoing support of the product as follows is also required.

• Warranty details • Spare parts and associated availability • Product support information.

Sup

erse

ded

by T

HR

EL

1600

1 S

P v

1.0,

16/

05/2

018

EP 16 00 00 01 SP - Pole Mounted Distribution Transformer · EL0003000 33 kV / 415 V 3 phase...

Documents

Transcript of EP 16 00 00 01 SP - Pole Mounted Distribution Transformer · EL0003000 33 kV / 415 V 3 phase...