Download Pole Mounted Distribution Transformer

EP 16 00 00 01 SP
POLE MOUNTED DISTRIBUTION
TRANSFORMER
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.
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Engineering Specification
Engineering Specification
Electrical
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
EP 16 00 00 01 SP
Document control
Version
2.0
3.0
3.1
© RailCorp
Issued November 2012
Date
May 2010
May 2011
Summary of change
Application of TMA 400 format
November 2012
ƒ
Technical Review
ƒ
General Formatting
ƒ
Additional sub sections for Technical
Characteristics
ƒ
Updating section - Reliability, Availability and
Maintainability
ƒ
Updating section – Tests
ƒ
New Section Quality Management System
ƒ
New Appendix – Request For Tender Checklist
ƒ
Add Appendix C "Requirements for Technical
Aspects of Tender Evaluation
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Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
EP 16 00 00 01 SP
Contents
1
Introduction .............................................................................................................................5
2
2.1
2.2
2.3
References...............................................................................................................................5
Australian Standards.................................................................................................................5
RailCorp Documents .................................................................................................................6
Drawings ...................................................................................................................................6
3
Definitions & Abbreviations ...................................................................................................6
4
4.1
4.2
Functional Characteristics .....................................................................................................7
General......................................................................................................................................7
Whole-of-Life Cost ....................................................................................................................7
5
5.1
5.2
Performance Characteristics .................................................................................................8
Rated insulation level ................................................................................................................8
Minimum Energy Performance Standards (MEPS) ..................................................................9
6
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12
6.13
6.14
6.15
Technical Characteristics.......................................................................................................9
Construction ..............................................................................................................................9
Rating Plate...............................................................................................................................9
Terminal Arrangement ..............................................................................................................9
Earth Terminal...........................................................................................................................9
Unearthed Secondary .............................................................................................................10
Lifting Attachments..................................................................................................................10
Hangers...................................................................................................................................10
Temperature-Rise Limits.........................................................................................................10
Finish.......................................................................................................................................10
Colour......................................................................................................................................10
Marking....................................................................................................................................11
Environment ............................................................................................................................11
Sound Level ............................................................................................................................11
Radio Interference...................................................................................................................11
Insulating Oil ...........................................................................................................................11
7
7.1
7.2
7.3
Reliability, Availability and Maintainability.........................................................................11
RAM Targets ...........................................................................................................................11
RAM Requirements.................................................................................................................12
Maintenance............................................................................................................................12
7.3.1
Oil Testing................................................................................................................12
8
8.1
8.2
Tests .......................................................................................................................................13
Type Tests ..............................................................................................................................13
Routine Tests ..........................................................................................................................13
9
9.1
9.2
Quality Management System ...............................................................................................13
Supplier’s Accreditation...........................................................................................................13
Inspection and Test Plan.........................................................................................................14
10
10.1
10.2
Data Set associated with the Equipment............................................................................14
Equipment Manuals ................................................................................................................14
Test Results ............................................................................................................................14
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Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
10.3
10.4
EP 16 00 00 01 SP
Life Cycle Costing ...................................................................................................................14
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
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Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
1
EP 16 00 00 01 SP
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
AS 2374.2
AS 2374.5
Metal finishing - Preparation and pre-treatment of surfaces Abrasive blast cleaning.
Insulating liquids - Specification for unused minerals insulating
oils for transformers and switchgear.
Power Transformers Part 1.2: Minimum Energy Performance
Standard (MEPS) requirements for distribution transformers
Power transformers Part 2: Temperature rise
Power transformers Part 5: Ability to withstand short-circuit.
AS 2700
AS 4680
Colour standards for general purposes
Hot-dip galvanized (zinc) coatings on fabricated ferrous articles
AS 60076.1
AS/NZS 2344
Power transformers – General
Limits of electromagnetic interference from overhead a.c.
powerlines and high voltage equipment installations in the
frequency range 0.15 to 1000 MHz
Power transformers - Insulation levels, dielectric tests and
external clearances in air.
Power transformers - Determination of sound levels.
Insulated bushings for alternating voltages above 1000 V
Quality management systems - Requirements
AS 1767.1
AS 2374.1.2
AS/NZS 60076.3
AS/NZS 60076.10
AS/NZS 60137
AS/NZS ISO 9001
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Page 5 of 19
Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
2.2
2.3
EP 16 00 00 01 SP
RailCorp Documents
EP 02 00 00 01 SP
EP 00 00 00 13 SP
Transformer Loss Evaluation
Electrical Power Equipment - Design Ranges of Ambient
Conditions
EP 00 00 00 15 SP
Common Requirements for Electrical Power Equipment
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.
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Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
EP 16 00 00 01 SP
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.
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Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
5
EP 16 00 00 01 SP
Performance Characteristics
Technical Parameter
11 kV Transformers
33 kV Transformers
AS 60076
AS 60076
Applicable standards
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
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
Rated voltage
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
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Page 8 of 19
Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
5.2
EP 16 00 00 01 SP
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:
11 kV terminals:
415 / 433 V terminals:
125 / 250 V terminals:
6.4
Between different phases
460 mm
Between phase and earthed metal
380 mm
Between different phases
185 mm
Between phase and earthed metal
160 mm
Between different phases
110 mm
Between phase and earthed metal
60 mm
Between different phases
70 mm
Between phase and earthed metal
60 mm
Earth Terminal
A suitable earthing terminal shall be located near the bottom of the tank.
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Page 9 of 19
Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
6.5
EP 16 00 00 01 SP
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.
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Page 10 of 19
Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
6.11
EP 16 00 00 01 SP
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.
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Page 11 of 19
Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
7.2
EP 16 00 00 01 SP
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.
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Page 12 of 19
Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
8
Tests
8.1
Type Tests
EP 16 00 00 01 SP
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 test 1 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.
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Page 13 of 19
Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
9.2
EP 16 00 00 01 SP
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.
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Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
Appendix A
EP 16 00 00 01 SP
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
.……………….............
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
.……………….............
°C
%
%
%
Flux density based on net cross-section of steel with rated voltage at rated frequency applied to the
principal tapping
− Limbs
.……………….............
T
− Yoke
.……………….............
T
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Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
EP 16 00 00 01 SP
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
.……………….............
Size of wire used to connect screen to the terminal
.……………….............
sq.mm
Volume of oil required to fill one transformer
.……………….............
Litres
Sound level
.……………….............
dBA
Yes/No
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
− Lightning impulse withstand voltage(if required)
.……………….............
kVp
− Power frequency withstand voltage
.……………….............
kVrms
Secondary Bushings
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
Issued November 2012
UNCONTROLLED WHEN PRINTED
Page 16 of 19
Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
EP 16 00 00 01 SP
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.
© RailCorp
Issued November 2012
UNCONTROLLED WHEN PRINTED
Page 17 of 19
Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
Appendix B
EP 16 00 00 01 SP
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.
© RailCorp
Issued November 2012
UNCONTROLLED WHEN PRINTED
Page 18 of 19
Version 3.1
RailCorp Engineering Specification — Electrical
Pole Mounted Distribution Transformer
Appendix C
EP 16 00 00 01 SP
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.
© RailCorp
Issued November 2012
UNCONTROLLED WHEN PRINTED
Page 19 of 19
Version 3.1