Spec 16323 38kV & 20(10) KV Indoor and Outdoor

Specification No. 16323 Rev: 7

38kV & 20 (10) kV Indoor and Outdoor Instrument Transformers for 38kV Stations

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Specification Number:

16323

Title: 38kV & 20(10) kV Indoor and Outdoor Instrument Transformers for 38kV Stations

Revision Number: 7

Issue Date: November 2013

Latest Review Date: June 2018 (ESB Specifications are subject to change, this specification version shall only be used for the purpose/project for which it was issued by ESB to you)

Approved for issue: Specifications Manager ESB Networks

Copyright – all rights reserved: No part of this Specification may be altered or incorporated into another document without permission in writing from ESB Specifications Manager.

Standard Template Version: 3(I)

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History of Revisions

Rev No Date Revision Content

7 December 2013

Reformat for use with 18080/81. References to 42kV rated voltage removed. Secondary winding insulation revised to 2kV. Ratings appropriate to 10kV removed. Extended current rating of 2 removed. VT secondary fuse removed from schedules.

6 Sept 2012 ESBI Specification PG406-F0000-S404-001-004 Minor changes

5 July 2012 ESBI Specification PG406-F0000-S404-001-003 General revision of Part 1 in line with template April 12 Part 2: 400/1A Ring Core CT included in Table 3 2.11 Corrosion Protection section modified, C5M included.

5 January 2012 ESBI Specification PG406-F0000-S404-001-002 General revision of Part 1 in line with template October 2011 and inclusion of section on ring CTs

5 September 2011

1) 38kV CT list extended to include 1A types 2) VT rated outputs reduced 3) Technical Schedules modified 4) Amended to Standard Spec Template 5) Reference to new IEC standard included

4

June 2002

Reformatted template for Doculive (1) Exclusion of cast resin housings for outdoor use.

Corrosion protection for metal parts under “Duty” clauses (in Part 2 – “Products”).

(2) Enhanced description of earthing terminal for indoor units

(3) Tables under “Terminal markings…” modified (4) References to use of SF6 added (1.07) (5) Technical Schedules modified

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3 Aug 1997 General

Note:

This specification will be reviewed at minimum before the Latest Review Date, but may also be reviewed in the interim. Consequently the “Latest Review Date” does not indicate that this particular version of the Specification is current. Accordingly, only the version of the specification issued by ESB to the user for the particular purpose/project should be used.

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ESB Technical Specification Approval

Title 38kV & 20 (10) kV Indoor and Outdoor Instrument Transformers for 38kV Stations

Specification revision number & date

Doculive Spec. No 16323 Rev: 7 Date: December 2013

Consultant Reference No.: PG___-____-___-___ Rev: Date:

Produced by: NAP, Asset Management Date: December 2013

Contract Conditions Reviewed:

Eirgrid

Department: N/A

Accepted::

Date:

ESB Networks:

Department: HV Stations Section Asset Management

Approved : Approved

Date: Dec 2013

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Table of Contents

PART 1 GENERAL ........................................................................................... 7

1.01 Scope ........................................................................................................................7

1.02 Health and Safety ......................................................................................................7

1.03 Applicable Codes and Standards ..............................................................................8

1.04 Service Conditions ....................................................................................................8

1.05 Environmental Design and Hazardous Substances ..................................................8

1.06 Quality Assurance .....................................................................................................8

1.07 Delivery .....................................................................................................................9

1.08 Maintenance ..............................................................................................................9

1.09 Warranty ................................................................................................................. 10

1.10 Compliance with Specification ............................................................................... 10

1.11 Accompanying Documentation .............................................................................. 10

1.12 Training .................................................................................................................. 10

1.13 Installation .............................................................................................................. 10

PART 2 PRODUCTS ...................................................................................... 11

2.01 Type and Duty ........................................................................................................ 11

2.02 Insulation Requirements ........................................................................................ 12

2.03 External Insulation .................................................................................................. 14

2.04 Short Time Current Withstand ................................................................................ 14

2.05 Ratings of Current Transformers ............................................................................ 14

2.06 Ratings of Voltage Transformers ........................................................................... 17

2.07 High Voltage Terminals .......................................................................................... 19

2.08 Mechanical Terminal Load ..................................................................................... 20

2.09 Terminal Boxes ...................................................................................................... 20

2.10 Earthing .................................................................................................................. 20

2.11 Corrosion Protection............................................................................................... 21

2.12 Markings ................................................................................................................. 21

2.13 Tests ....................................................................................................................... 22

2.14 Insulating Oil Requirements ................................................................................... 23

APPENDIX 0 FILLING IN THE TECHNICAL SCHEDULES .................................... 24

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APPENDIX 1 SUPPLEMENTARY GENERAL SCHEDULE ..................................... 25

APPENDIX 2 TECHNICAL SCHEDULE ................................................................. 27

APPENDIX 3 DEVIATIONS SCHEDULE ............................................................... 44

APPENDIX 4 TEST CERTIFICATE SCHEDULE .................................................... 44

APPENDIX 5 SPECIAL TOOLS / ACCESSORIES .................................................. 47

APPENDIX 6 RECOMMENDED SPARES .............................................................. 48

APPENDIX 7 CORROSION PROTECTION SCHEDULES....................................... 49

APPENDIX 8 –LIST OF INSTRUMENT TRANSFORMERS IN USE ON ESB SYSTEM .... 51

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Part 1 General

1.01 Scope This technical specification covers manufacturing, testing and delivery of 38kV and 20(10) kV voltage and current transformers for use in indoor and outdoor applications in substations owned by ESB and operated by ESB Networks. This specification is written for use in either the ESB or IPP procurement process. In addition to the requirements of this specification, the product shall also comply with the requirements of one of the following General Specifications, as appropriate:

Specification 18080 – “General Material, Equipment / Works (MPE/W) Requirements” (for use by Tenderers to ESB or Specification 18081 – “General Plant Requirements for Equipment supplied by IPP for use on Contestably Built Network”.

In Part 1 of this specification and the above two specifications, the clause numbering systems correspond. In the clauses in Part 1 of this specification, there may be additional requirements listed with which the product shall comply. In the case of conflict, the product shall comply with the additional requirements of the clauses in this specification.

The manufacturer shall have:

(a) At least 10 years experience in the production of the relevant voltage/current range (20kV and 38kV respectively or higher) of the instrument transformers specified i.e. the “product’’,

(b) Service experience:

Installation of the product in at least three EU utilities

A service experience of the product range of at least 5 years duration in these EU utilities of at least 5,000 units

(c) As an alternative to such experience within the EU, similar experience with Japanese, South Korean, Australian or US/Canadian utilities would be considered.

(d) At least 5 years production in the particular plant proposed is required, although if the particular plant proposed is a relocated existing plant using substantially the same workforce the combined time of both plants would be considered.

(ESB Procurement) The TECHNICAL SCHEDULES attached to this specification are individual to each enquiry and set out the particular technical requirements of the application/equipment involved. Quantities required, delivery dates, Price Schedules, Instructions to Tenderer and ESB Conditions of Contract including Payment Terms are contained in the enquiry documentation. Completed PRICE SCHEDULES shall be returned with the tender.

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(IPP) The technical requirements, as set out in the Site Specific documents shall be transferred by IPP to the schedules along with the details of the proposed product.

1.02 Health and Safety No additional requirements.

1.03 Applicable Codes and Standards Additional requirements: The instrument transformers shall comply with this Specification and with the latest editions of the following standards and Codes:

IEC 60044 - All Parts Instrument Transformers

IEC 60529 Classification of degrees of protection provided by

Enclosures.

IEC 60815 Guide for the selection of insulators in respect of polluted conditions.

IEC 61869 - All Parts Instrument Transformers

IEC 62271-301 Dimensional standardisation of terminals for High-

Voltage switchgear and control gear.

VDE 0635 Low Voltage Fuses

ISO 12944-2 Paints and Varnishes - Corrosion Protection of Steel Structures by Protective Paint Systems - Part 2: Classification of Environments

ESB Specification 18020: Transformer Oil for use in Distribution and

Transmission Transformers up to 400kV

ESB Specification 05031 Coating Systems for Transformers and Enclosures

1.04 Service Conditions No additional requirements.

1.05 Environmental Design and Hazardous Substances No additional requirements.

1.06 Quality Assurance No additional requirements.

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1.07 Delivery Additional requirements:

A Delivery Monitor shall be provided.

(ESB Procurement)

Instrument Transformers shall be packed singly in open sided crates (for inspection); In cases where the Centre of Gravity is higher than 1m the Instrument Transformers shall be packed with the longer side horizontal (to reduce risk of crate toppling over). Instrument Transformers shall be packed singly in open sided crates (for inspection) with the longer side horizontal (to reduce risk of crate toppling over). Instructions for lifting shall be attached to each crate along with the words ‘Handle with Care’. Outdoor instrument transformers shall be storable outdoors.

(ESB Procurement)

All sides and top of each case shall be marked clearly using weatherproof labelling with:

a. ESB Order No,

b. Manufacturers Name,

c. Manufacturer’s Serial Number,

d. Manufacturer’s Order Number,

e. ESB’s seven digit Code Number and Description (to be detailed after award of contract,)

f. Gross Weight in kg,

Where the instrument transformer contains oil, the weight of oil in each unit shall be clearly stated. Where the instrument transformer uses oil it must be completely filled to operational level.

g. Station or ESB store’s name

h. Shall be accompanied by a detailed packing note and any special handling instructions

Details of the Delivery Monitors proposed for use in monitoring shocks to the equipment during transport shall be provided. These monitors shall be non-returnable and shall be mounted in locations such that they are visible without opening the packaging.

1.08 Maintenance No additional requirements.

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1.09 Warranty Additional requirements:

(ESB Procurement)

An optional cost shall be provided for extending, to 10 years, the warranty covering all defects attributable to inadequate corrosion protection.

1.10 Compliance with Specification No additional requirements.

1.11 Accompanying Documentation No additional requirements:

1.12 Training No additional requirements.

1.13 Installation No additional requirements.

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Part 2 Products

2.01 Type and Duty All instrument transformers shall be single phase units. The instrument transformers are for indoor and outdoor use and shall be designed and constructed to endure the Service and Environmental Conditions outlined in this specification. The internal insulating medium of the transformer may be oil or the windings cast in epoxy resin. If the voltage transformers contain oil, then minimum oil units are preferred and they shall be hermetically sealed, there is no requirement for oil sampling or level indication. Cast resin housings or insulators will not be considered for outdoor use, unless the resin is enclosed by porcelain. Housings and insulators shall either be porcelain or silicone rubber. Corrosion protection of exposed metal parts shall be described in detail in the Schedule – treatments using only paint shall not be acceptable for outdoor use. For units with oil, a certificate guaranteeing that the PCB content of any insulating medium is less than 1 ppm shall be provided to ESB. All substances used shall be classified in accordance with European Community SI on Hazardous Substances Regulations. Safety Data Sheets shall be submitted where appropriate.

2.01.01 38kV Voltages

The 38kV voltage transformer shall be of earthed type (single pole) with one primary winding and two secondary windings. One winding with a ratio of primary voltage to 100/√3V will be star connected in service and used for metering and protection purposes. One secondary winding with a ratio of primary voltage to 100/3 V will be connected in open-delta, to produce a residual voltage, for the purpose of earth fault protection. The 38kV current transformer shall have one primary winding and two secondary windings on independent magnetic cores.

(ESB Procurement) An optional cost shall be provided for current transformers for 38kV applications to be fitted with a capacitive voltage tap to facilitate insulation tests.

2.01.02 20(10)kV Voltages

The 20(10) kV voltage transformer shall have one primary winding and a centre tap on secondary windings for 20kV and 10kV operation. The 20kV current transformer shall have one primary winding and secondary winding(s) on independent magnetic cores.

2.01.03 Cubicle Dimensions

Three similar instrument transformers are required to fit in line within ESB screened cubicles of minimum dimensions and clearances as follows:

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Cubicle Clearances

Cubicle Width Phase/Phase Phase/Screen

38kV Outdoor 3500mm 470mm 470mm

38kV Indoor 2500mm 470mm* 470mm

20 (10kV) Outdoor 1700mm 220mm 300mm

20 (10kV) Indoor 1100mm 220mm 220mm

*Lower values for phase to phase clearances may be accepted subject to confirmation of withstand level for 3 phase system by manufacturer.

2.01.04 Range of Instrument Transformers required

The Range of CT’s and VT’s required is listed in Appendix 8.

2.01.05 Mounting

(ESB Procurement) Units will normally be mounted on steel pedestals provided by the Purchaser. Some 38kV units may be ground mounted in screened cubicles.

Instrument transformers shall be suitable for mounting vertically on steel supports to be provided by the Purchaser. Ring core CT units shall be suitable for mounting in a vertical position.

2.02 Insulation Requirements

2.02.01 Primary Windings

Primary Windings for 38kV Voltages

Rated lightning impulse withstand voltage phase to earth and between phases

250kV peak

Rated short-duration power frequency withstand voltage

95kV rms

Primary Windings for 20(10)kV Voltages

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Rated lightning impulse withstand voltage phase to earth and between phases

125kV peak

Rated short-duration power frequency withstand voltage

50kV rms

2.02.02 Outdoor Creepage distance

The Reference Unified Specific Creepage Distance (RUSCD) for the phase to earth insulators shall be in accordance with IEC 62271-1 and IEC 60815 for rated voltages 52kV/24kV and heavy pollution level 43.3mm/kV. In certain cases a higher RUSCD value for very heavy pollution level 53.7mm/kV may be required.

(ESB Procurement) The tenderer shall offer both variants.

(IPP) The IPP shall supply the creepage distance requested by ESB in the site specific documentation.

The RUSCD shall be corrected for insulator diameter using the method given in IEC 60815-2 The supplier shall also state the profile factors (as defined in IEC 60815-2 or-3) for the proposed insulator design in the TECHNICAL SCHEDULES.

2.02.03 Partial Discharge

There are no partial discharge requirements of 38kV and MV rated instrument transformers as a whole. However, in the case of components for which the relevant IEC Publication includes partial discharge measurement (e.g. bushings covered by IEC 60137), evidence shall be submitted by the Supplier showing that those components have passed the partial discharge tests in accordance with the IEC Publication.

2.02.04 Secondary Windings

The rated power frequency withstand voltage for 1 minute shall be 2kV.

2.02.05 Oil Compartment to LV Terminal Box Interface

The materials used to bring the end of the VT primary winding, intended to be earthed, from the oil compartment out to the LV terminal box shall be of non-moisture absorbing materials and shall remain so for the life of the transformer. The materials used to bring the secondary windings of VTs and CTs from the oil compartment out to the LV terminal

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boxes shall be of non-moisture absorbing materials and shall remain so for the life of the transformer. This applies equally to combined CT/VT’s.

2.03 External Insulation (ESB Procurement) Only where the internal insulation is oil, the manufacturer shall provide a priced option for silicon rubber insulation.

The insulator shall have stable leakage currents to ground, during 10kV insulation tests, in different weather conditions and throughout the life of the instrument transformer. If a single insulator is not offered the preference is for stacked, horizontal jointed insulators, rather than a continuous top to bottom joint.

The instrument transformers shall comply with internal arc fault protection Class 1 / 2, as defined in IEC 61869-1.

(ESB Procurement) The respective costs for providing internal arc fault protection of both Class 1 and Class 2 shall be provided.

Full details of possible failure mechanisms which would result in shattering of external insulation, history of such events and mitigation methods incorporated in the instrument transformer design, shall be provided.

2.04 Short Time Current Withstand

2.04.01 38kV Voltages

The 3 phase Short circuit (rms) shall be 20kA r.m.s. The dynamic current (peak) shall be 50kA.

2.04.02 20(10)kV Voltages

The 3 phase Short circuit (rms) shall be 12.5kA r.m.s or 20kA r.m.s as requested. The dynamic current (peak) shall be 31.5kA or 50kA as requested.

2.05 Ratings of Current Transformers The following shall apply to CTs and the CT part of CT/VT’s

2.05.01 Primary Current

The primary current ratings shall be as specified in the attached TECHNICAL SCHEDULES/Table 1 of Appendix 8 which set out the particular requirements of the equipment. Where Dual ratio is required, this will be by primary reconnection, and ratings on the networks covered by this specification are as shown in Appendix 8.

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2.05.02 Secondary Current

The rated current of secondary windings shall be 1A or 5A as specified in the TECHNICAL SCHEDULES.

2.05.03 Transformation Ratio

The ratios including primary dual connection requirements and numbers of secondary windings, shall be as specified in the TECHNICAL SCHEDULES/Tables 1-3 in Appendix 8 for the particular applications of the equipment.

2.05.04 Output for 38kV voltages

The rated outputs shall be as stated in the attached TECHNICAL SCHEDULES which set out the particular requirements of the equipment. Standard outputs on the networks for 1A or 5A rated windings are 5 VA for revenue metering, 15VA for non-revenue metering, and 30VA for protection.

Current Transformers for Differential Protection

Items 4 and 5 of Table 1 Winding 2 will be used for differential protection and when in service must meet the following requirement.

kRated.(PBN + Pint)/(PBC + Pint) ≥ 80

Where kRated = rated accuracy limit factor PBN = rated burden (VA)

Pint= internal power consumption of CT at rated current (VA) PBC = external burden (VA) ~3.4VA

Alternatives, in terms of burden and accuracy limit factor, which meet the requirement, may be offered where the supplier clearly demonstrates that this is the case. Minimum CT dimension is required.

2.05.05 Output for 20kV voltages

The 24kV current transformers shall have burdens and accuracies as per Tables 2 and 3 in Appendix 8.

Current Transformers for Differential Protection

Items 6 and 8 of Table 2 Winding 3 will be used for differential protection and when in service must meet the following requirement.

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kRated.(PBN + Pint)/(PBC + Pint) ≥ 60

Where kRated = rated accuracy limit factor

PBN = rated burden (VA)

Pint= internal power consumption of CT at rated current (VA)

PBC = external burden (VA) ~5.2VA

Alternatives, in terms of burden and accuracy limit factor, which meet the requirement, may be offered where the supplier clearly demonstrates that this is the case. Minimum CT dimension is required.

2.05.06 Rating Plate

The information contained on rating plates shall be in accordance with IEC 61869-1 general requirements and IEC60044-1 for current transformers and in addition, the year of manufacture shall be included. Refer to Section 2.12.

2.05.07 Additional Requirements for Metering CTs

a) Accuracy Class The rated accuracy classes shall be as required by the TECHNICAL SCHEDULES. Standard accuracy classes on the networks covered by this specification are 0.2 and 0.5. For revenue metering 0.2S is required where specified.

b) Extended Current Rating The specified errors and phase displacements shall be retained up to 1.2 times rated primary current as required by the TECHNICAL SCHEDULES.

c) Instrument Security Factor The instrument security factor shall be 5.

2.05.08 Additional Requirements for Protection CTs

a) Accuracy Class And Accuracy Limit Factor The rated accuracy classes and accuracy limit factors shall be as required by the TECHNICAL SCHEDULES. Typical ratings on the networks covered by this specification are as follows.

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Accuracy Class Accuracy Limit Factor 5P 50

2.05.09 Additional Requirements for Ring CTs

a) Accuracy Class The rated accuracy classes shall be as required by the TECHNICAL SCHEDULES.

b) Extended Current Rating The specified errors and phase displacements shall be retained up to 1.2 times rated primary current as required by the TECHNICAL SCHEDULES.

c) Instrument Security Factor The instrument security factor shall be 5.

d) Cable Diameter Capacity The minimum diameter of the inner ring shall be capable of accommodating a 630mm2 (cross sectional area) cable with overall diameter of 54mm + 10mm for the return of the cable screen.

2.06 Ratings of Voltage Transformers The following shall apply to VTs and the VT part of CT/VT’s

2.06.01 Voltages and Transformation Ratios for the 38kV and 20(10) kV Voltages

The rated primary voltages shall be 38.5kV/√3 or 24kV/√3 , as required by the TECHNICAL SCHEDULES. The rated secondary voltage shall be 100/√3 for windings to be star connected and 100V/3 for windings to be connected in open delta for residual voltage purposes. The number of each type of secondary winding shall be as specified in the TECHNICAL SCHEDULES.

2.06.02 Output for 38kV Voltages

The rated outputs shall be 50VA and 25VA for star connected and open delta connected windings, respectively. The accuracy and rated output is included in Table 1 of Appendix 8

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2.06.03 Output for 20(10) kV Voltages

The rated outputs shall be 50VA and 25VA for star connected and open delta connected windings, respectively. The accuracy and rated output is included in Table 2. Where possible the secondary rated output and accuracy class shall be the same for both 10kV and 20kV operation. Where this is not possible, then the supplier shall provide alternatives which come as close as possible to the specification.

2.06.04 Accuracy Class

1. Star Connected Winding The accuracy class shall be 0.5 for metering and 3P for protection, i.e. dual designation. Accuracy class for revenue metering shall be 0.2.

2. Open Delta/Residual Voltage Winding The open delta winding shall conform to the following requirements, as permitted by IEC 61869-3 Clause 5.6.302 The standard accuracy class shall be Class 0.2 in accordance with subclause 5.6.302.1, with accuracy defined by Table 301 of Clause 5.6.302.3 for any voltage between 80% and 120% of rated voltage. Since the voltage transformer has a total of two secondary windings, the following stipulation additionally applies, as permitted by Clause 12.2. The residual voltage winding shall fulfil its accuracy requirements over a range of outputs from 5 to 100% rated value while at the same time the other windings supply a total output of any value from zero to 100% of their rating. In addition, the accuracy class shall be Class 3P in accordance with subclause 13.5, with accuracy defined by Table 12 of Clause 13.2 for voltages of 5% and 190% of rated voltage. The higher errors at 2% rated voltage imposed by that clause shall also apply. Since the voltage transformer has a total of two secondary windings, the following stipulation additionally applies as permitted by Clause 13.2. The residual voltage winding shall fulfil its accuracy requirements over a range of outputs from 5 to 100% rated value while at the same time the other windings supply a total output of any value from zero to 100% of their rating.

2.06.05 Voltage Factor

The rated voltage factor shall be 1.2 for continuous and 1.9 for 8hours for 38kV and 20(10)kV.

2.06.06 Rating Plate

The information contained on rating plates shall be generally in accordance with the requirements of IEC61869-1 and IEC61869-3 for voltage transformers and in addition, the year of manufacture shall be included. (Refer to Section 2.12 for additional information). Secondary terminals of multi-ratio voltage transformers are to be marked as per the table below:

CORE NO. OF SECONDARY WINDING RATIO USE RATED

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NO. POLES TERMINALS OUTPUT & ACCURACY

1 One 1a1-1n (10,000/√3)/(100/√3) Metering 50VA Class 1.0

Two 1a1-1n 10,000/100

1 One 1a2-1n (20,000/√3)/(100/√3) Metering 50VA Class 1.0

Two 1a2-1n 20,000/100

2 One 2a1-2n (10,000/√3)/(100/3) Protection 25 VA Class 3P

Two ------ ------

2 One 2a2-2n (20,000/√3)/(100/3) Protection 25 VA Class 3P

Two ------ ------

2.06.07 Earthing

The end of the primary winding intended to be earthed shall be terminated using a bushing inside the terminal box and have Um of 0.72kV and corresponding power frequency withstand voltage of 3kV. An earth terminal shall be provided adjacent to this bushing and shall be connected to it by means of a readily removable strap. These shall be identified and be separate from the secondary terminals.

2.06.08 Protection of Secondary Windings

Not Applicable.

2.06.09 HV Cable / Capacitor Bank Discharge Capability

Some voltage transformers may be required to discharge long lengths of high voltage cables. The cable or capacitor discharge capability at different voltages shall be as required by the TECHNICAL SCHEDULES. Typical requirements (to cover maximum cable lengths) on the networks covered by this specification are as follows:

Rated Primary

Voltage kV Discharge Capacitance µF

XLPE Cable Oil-Insulated Cable Capacitor Bank 38/√3 3.0 7.5 N/A

2.07 High Voltage Terminals The terminals, which shall comply with IEC 62271-301, shall be 20mm or 30mm round copper terminals as required by the TECHNICAL SCHEDULES. The HV terminals of

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the voltage transformers shall be mounted on top of the units. If this is not possible, two terminals shall be provided, one on either side of the units, and in that case, the terminals, and the connection between them, shall have a continuous current rating of 1000A for 38kV items, and 1600A for 20(10)kV items. The supplier shall include full particulars of the proposed terminals in the TECHNICAL SCHEDULES.

2.08 Mechanical Terminal Load The rated static withstand loads shall be as specified in the attached TECHNICAL SCHEDULES which set out the particular requirements of the equipment. The instrument transformers shall be capable of withstanding the specified static loads which include for the effects of wind and ice. During tests to prove rating, it is intended that the specified load for a particular unit be applied in any direction to the primary terminals. During routine operation, the sum of the loads acting should not exceed 50% of the specified withstand load. Instrument transformer units shall withstand rarely occurring extreme dynamic loads (e.g. short circuits) not exceeding 1.4 times the static withstand load. Typical requirements on the networks covered by this specification are as follows.

Highest Network Voltage Static Withstand Load 52kV 2kN

2.09 Terminal Boxes The degree of protection provided by the terminal boxes shall be IP54 in accordance with IEC 60529 and they shall be ventilated to prevent condensation. The bottom plate of the box shall be furnished undrilled, but sufficiently large to accommodate up to 3 holes each 25mm dia at 35mm centres for cable glands. Combined units shall have separate terminal boxes for current and voltage terminals. In addition to the earthing terminal for the earthed end of the primary winding (only for VTs), an earthing terminal shall be provided within each terminal box for earthing the secondary windings. All secondary windings of instrument transformers shall be capable of being readily disconnected and isolated from ground for testing purposes.

2.10 Earthing The transformer shall be provided with an earthing terminal so that all metal parts of the frame can be earthed. The earth terminal shall be clearly marked with the letter "E" and the diameter of the clamping screw should be at least 12mm. For indoor equipment in particular which may be placed close to a wall with consequential access difficulties, the terminal should be a fixed stud or a bolt (with head accessible under the transformer base) suitably locked in place to prevent rotation when securing the earth lead.

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All primary and secondary windings of instrument transformers should be capable of being readily disconnected and isolated from ground for testing purposes, i.e. not permanently earthed.

2.11 Corrosion Protection As stated in 1.04 corrosion of both ferrous metals and of aluminum and aluminum alloys is a particular problem in Ireland Experience has shown that extreme precautions are necessary, because of the high humidity, to prevent the aggressive ingress of moisture between flange plates, around gaskets and o-rings, at insulator/flange interfaces, etc All exposed ferrous parts, including nuts and bolts, shall be hot-dip galvanised to comply with ESB Specification No. 05030. All corrosion protection and painting systems shall be designed to achieve a High Durability (above 15 years) coating for Category C5-M (ISO 12944-2) environments with high condensation, pollution and salinity.

(ESB Procurement) In addition the Tenderer shall include a priced option for any additional features or surface treatments which would contribute further to the long-term corrosion resistance of the equipment.

Attention shall be given to all exposed points in the equipment at which aluminium or aluminium-alloy parts are in contact with or in close proximity to other metals, and the design shall ensure that air and moisture are excluded from such situations. Details shall be stated clearly in the schedule of Corrosion Protection, Appendix 7 (part of TECHNICAL SCHEDULES) of the composition of all aluminum alloys used and of the corrosion protection applied to each aluminum or aluminum-alloy part and what precautions are employed at each point to exclude air and moisture. Full details of all painting systems employed on the equipment shall also be provided The special test for corrosion protection described by IEC 61869-1 shall be carried out as part of the tests.

2.12 Markings The terminal markings shall comply with IEC Standards, except where specified as per section 2.06.E. The transformer ratio shall be marked in solid text on the body in figures of at least 20mm high. Rating plates, labels and other markings shall be clear, indelible, corrosion proof, and shall be in English. The serial numbers of each transformer and a six digit device category code, to be supplied by ESB Networks, shall be marked on the nameplate or on the body in bold characters at least 4mm high. Drawings of all rating plates and labels shall be submitted for the ESB’s approval.

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In addition, the equipment shall have the CE Mark where appropriate in accordance with the requirements of clause 1.03.

(ESB Procurement) An offer to include the actual factory test values to be stamped on the nameplate, or on a separate nameplate, may be included and any effect on delivery time stated.

2.13 Tests As ESB may wish to witness type and/or routine tests, or visit the factory during the manufacture of any or all of the Instrument Transformers, adequate notice of tests and manufacturing programmes shall be given.

2.13.01 Type Tests

All instrument transformers offered shall have been fully type-tested in accordance with the tests listed in the following IEC standards and the results shall demonstrate, in relevant respects, the capability to meet the requirements of this specification. IEC 61869-1 for all instrument transformers IEC 60044-1 for CTs and the CT part of combined units IEC 61869-3 for VTs and the VT part of combined units IEC 60044-3 for particular test requirements for combined units IEC 60044-6 for protective current transformers for transient performance These type tests shall have been carried out at an independent testing station or alternatively have been witnessed by a representative of an independent testing agency or other independent witness. Certificates/Reports containing full details of type tests shall be submitted to ESB. The acceptance of any equipment may be made conditional on further type tests being performed at an independent testing station and ESB may witness such tests. In the event of a type test failure, ESB shall not be liable for the cost of any additional type tests.

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2.13.02 Routine Tests

All instrument transformers shall be routine tested in accordance with the test requirements of the following standards.

IEC 61869-1 for all instrument transformers IEC 60044-1 for CTs and the CT part of combined units IEC 61869-3 for VTs and the VT part of combined units IEC 60044-3 for particular test requirements for combined units

IEC 61869-6 for protective current transformers for transient performance

Partial discharge measurements and dielectric dissipation factor (tan σ) shall be measured and recorded for all units. The manufacturer shall measure the actual creepage distances to earth over external insulation on a representative sample of the instrument transformers prior to dispatch from works. The measured values shall be included with the Routine Test results. The tests may be witnessed by ESB.

2.13.03 Special

ESB may require that special tests be performed, on one production unit of each category, in accordance with IEC 60044-1 for CTs and IEC 61869-3 for VTs, and IEC 61869-1 for all types, i.e. chopped impulse test on primary winding, measurement of capacitance and dielectric dissipation factor and mechanical tests. The tests may be witnessed by ESB.

(ESB Procurement) These special tests are to be itemised and priced separately in the tender.

(IPP) These special tests shall be at the IPP’s expense.

2.14 Insulating Oil Requirements The insulating oil shall be new, unused mineral oil according to ESB Specification 18020. Suppliers shall state the Water Hazard Class of the oil. Manufacturers shall ensure that at all stages in the manufacture, test and installation of the instrument transformer, the instrument transformer and insulating oil shall be free of all contaminants including cross-contamination by other insulating fluids. All the provisions of REACH 1907/2006 and CLP Regulation (EC) No 1272/2008 shall be complied with.

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http://echa.europa.eu/legislation/classification_legislation_en.asp



______________________________________________________________________________________________

Appendix 0 Filling in the Technical Schedules (ESB Procurement) Technical schedules are printed in this document for your convenience. There is also an embedded Microsoft Excel spreadsheet that contains the same information. Double click on the icon below to access the embedded Excel spreadsheet. (Icon can only be seen on the screen – not on the printed page)

Where more than one value is possible for technical parameters in this schedule, the required value is set out in the quotation sheet in the Tender Invitation Documents. Please transfer these values to the relevant cells in the schedule.

When completing the technical schedules:

Type your information into the Excel spreadsheet provided and return the following with your bid submission:

o A completed Excel spreadsheet saved on a compact disc

o A printed and signed copy of the technical schedules

Do not email the technical schedule. All tender documents must be returned in a sealed envelope and will only be opened by ESB after the tender closing date.

Icon:

(IPP)

Where more than one value is possible for technical parameters in this schedule, the required value is set out in the Site Specific Functional Specification for the project. Please transfer these values to the relevant cells in the schedule.

This document has been saved in Adobe PDF Reader Extended mode. This allows data to be saved into the PDF using the Typewriter tool. When completing the technical schedules please enter the relevant values/answers into the PDF file using the Typewriter tool. When all schedules have been fully completed, the final PDF file should be submitted along with signed schedules printed from the final PDF.

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Appendix 1 Supplementary General Schedule Definitions are in accordance with IEC Publications 6, Latest Edition

Item No.

Clause Description Reply

1 1.11 Confirm inclusion of following or note deviations 1.Service experience to date including defects history -

provide details

(a) At least 10 years experience in the production of the relevant voltage/current range (or higher) of the instrument transformers specified i.e. the “product’’,

(b) Service experience a. Installation of the product in at least three EU

utilities

b. With a service experience of the product range of at least 5 years duration in these EU utilities of at least 5,000 units.

(c) As an alternative to such experience within the EU, similar experience with Japanese, Australian or US/Canadian utilities would be considered.

(d) At least 5 years production in the particular plant proposed is required, although if the particular plant proposed is a relocated existing plant using substantially the same workforce a lesser time would be considered.

2. The cost of Type Tests should in all cases be stated in the submission but if the manufacturer has test certificates which indicate full compliance with the requirements of the various clauses he should state this and submit them to be considered as an alternative to tests.

3. Suppliers shall draw attention to all exposed points in their equipment at which aluminium or aluminium-alloy parts are in contact with or in close proximity to other metals, and shall state clearly what protection is employed at each point to exclude air and moisture

Points at which Aluminium in contact/close proximity with other metals identified?

We confirm that we have read and understand the requirements of this Specification and we confirm the equipment is compliant with the clauses therein other than as detailed in our List of Deviations

Name of Company : _____________________

Position in Company : _____________________

Signature : _____________________

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______________________________________________________________________________________________

Date : _____________________

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Appendix 2 Technical Schedule

Schedule A: 38kV Current Transformers

Item No.

Clause Description Required Offered

1 2.01 Manufacturer (a) Name

(b) Designation

(c) Place of manufacture

2 2.01 For Outdoor or Indoor service 3 2.01 Type

CT or CT Part of CT/VT

(a) Unit Single Phase

(b) Housing State type

(c) Internal insulating medium Oil / Resin

kg weight of insulating medium kg

(d) PCB content < 1 ppm

(e) Water Hazard Class (if oil)

(f) Design Type (e.g. Hairpin, Top Hat etc)

Type

(g) Drawing No No.

(h) Standard

4 2.02 Highest voltage for equipment kV 44

5 2.02 Rated Frequency Hz 50 6 2.02 Rated HV Insulation Levels

(a) Lightning Impulse wave withstand equipment Phase to Phase and Phase to Earth

kVpeak 250

(b) Power frequency withstand all equipment Phase to Phase and to Earth

kVrms 95

7 2.02 Creepage distance to earth Heavy pollution (a) RUSCD (43.3mm/kV) mm ≥1049 (b) Corrected USCD mm (c) Insulator profile factors (d) Alternating sheds Yes/No (e) Spacing versus shed

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overhang (s/p) (f) Minimum distance between sheds mm

(g) Creepage distance versus clearance (l/d)

(h) Shed angle (α) degrees (i) Creepage factor (l/S) Very heavy pollution (a) RUSCD (53.7mm/kV) mm ≥1302 (b) Corrected USCD mm (c) Insulator profile factors (d) Alternating sheds (e) Spacing versus shed overhang (s/p)

(f) Minimum distance between sheds mm


(h) Shed angle (α) degrees (i) Creepage factor (l/S)

8 2.02 Partial discharge tests submitted by supplier

Yes (state PD in pC)

9 2.02 Insulation level of secondary circuits

kV 2

10 2.03 Internal arc protection Complies with internal arc fault protection Class 1 / 2, as defined in IEC61869-1

Yes

Details provided for possible failure mechanisms which would result in shattering of external insulation

Yes (Provide design details)

11 2.04 Short time withstand currents (a) Short time thermal current kA rms 20 (b) Duration secs 1 (c) Dynamic current kA peak 50

12 2.05 Rated Primary Current A See Table 1 13 2.05 Extended Current Rating

Factor 1.2 See Table 1

14 2.05 Rated secondary current A 1 or 5A as per accompanying documentation

15 2.05 Ratios, including Primary Reconnection and Numbers of Secondary Windings

See Table 1

16 2.05 Rated Characteristics for each Secondary Winding

16.1 Metering Windings See Table 1

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No.of Windings Secondary Winding No. Output VA Accuracy Class Knee point voltage Icth / Extended Current Rating Secondary Resistance @ 75deg. C

Calculated Operating Overcurrent Factor

Accuracy Limit factor % 16.2 2.05 Protection Windings

See Table 1

No. of Windings Secondary Winding No. Output VA Accuracy Class Accuracy Limit factor Knee point voltage Icth / Extended Current Rating Secondary Resistance @ 75deg. C


17 2.08 HV Terminals (a) Material Copper (b) Diameter of stud mm 20/30 (c) Length of stud mm 40/60 (d)Standard specification IEC 62271-301 (e) If two terminals, rated continuous current

1,000A

18 2.09 Mechanical Withstand Terminal Load

Through Terminals (a) Static kN 2 (b) Dynamic kN 2.8 Single Terminal (a) Static kN 1

19 2.10 Secondary Terminal Box (b) Earthing terminal for secondary earth

Yes

(c) Degree of Protection IP54 20 2.11 External Earthing Stud Yes 21 2.12 Hot Dip Galvanising of

exposed ferrous parts ESB 05030

Treatment to meet C5-M Standard detailed in schedule 7

Yes

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22 Weight of single phase unit kg 23 2.13 Rating Plate

(a) In English, indelible, corrosion proof

Yes

(b) Information per specification

Yes

24 2.13 Are Type Test Certificates/Reports, included?

Yes

25 2.14 Insulating medium Oil volume litres Resin Litres/kg Oil complies with ESB Specification 18020

Yes

26 2.01 Oil-immersed insulation Hermetically Sealed Yes Oil expansion system to be a non corrosive metallic type and be impervious to moisture throughout its life

Yes

27 1.09 Warranty Period (a) All parts from delivery/commissioning Years 1 and 2 per 1.09

(b) Defects in corrosion protection Years 5 and 10 per 1.09

28 Transport Weight kg Erected Weight kg

29 Overall Dimensions excl. packaging (Length mm x Width mm x Height mm)


Name of Company : _____________________

Position in Company : _____________________ Signature : _____________________

Date : _____________________

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Schedule B: 38kV Voltage Transformers

Item No.


1 2.01 Manufacturer (a) Name (b) Designation (c) Place of manufacture


VT or VT Part of CT/VT

(a) Unit Single Phase (b) Housing State type (c) Internal insulating medium Oil / Resin -kg weight of insulating medium Kg (d) PCB Content <1ppm (e) Water Hazard Class (if oil) (f) Design Type (g) Drawing No No. (h) Standard

4. 2.02 Highest voltage for equipment kV 44 5. 2.02 Rated Frequency Hz 50 6. 2.02 Rated HV Insulation Level


kVpeak 250


kVrms 95

7 2.02 Creepage distance to earth Heavy pollution (a) RUSCD (43.3mm/kV) mm 1,049 (b) Corrected USCD mm (c) Insulator profile factors (d) Alternating sheds Yes/No (e) Spacing versus shed overhang (s/p)

(f) Minimum distance between sheds

mm


(h) Shed angle (α) degrees (i) Creepage factor (l/S) Very heavy pollution (a) RUSCD (53.7mm/kV) mm 1,302

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(b) Corrected USCD mm (c) Insulator profile factors (d) Alternating sheds (e) Spacing versus shed overhang (s/p)


mm


(h) Shed angle (α) (i) Creepage factor (l/S) degrees

8. 2.02 Partial discharge tests submitted by suppplier

Yes

9. 2.02 Insulation level of secondary circuits

kV 2


Yes




12 2.05 Rated Primary Voltage kV 38.5kV/√3 13 2.05 Rated Voltage Factor 1.9, 8hrs 14 2.05 Rated Secondary Voltage

(a) Star connected windings V 100/√3 (b) Residual voltage winding V 100/3

15 2.05 Number of Secondary windings (a) Star connected windings 1 (b) Residual voltage windings 1

16.1 2.05 Rated Characteristics for each Sec Wdg

Wdg - Star Connected 100/√3V

See Table 1

Duty Output VA Accuracy Classes

16.2 2.05 Wdg - Residual Voltage 100/3V

See Table 1

Duty Output VA Accuracy Classes

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17 2.05 3kV Bushing for HV Earth Connection with removable connection to adjacent Earth Terminal

Yes

18 2.05 n/a 19 2.05 Maximum cable capacitance

(per phase) that may be discharged.

at 1.0 x Rated Primary Voltage

µF 7.5


µF


µF

20 2.07 HV Terminals (a) Material Copper (b) Diameter of stud mm 20/30 (c) Length of stud mm 40/60 (d) Standard specification IEC 62271-301 (e) If two terminals, rated continuous current

1000A


Through Terminals (a) Static kN 2 (b) Dynamic kN 2.8

Single Terminal (a) Static kN 1

22 2.09 Terminal Box (a) HV Earth Connection Yes (b) n/a (b) Earthing terminal for secondary earth

Yes

(c) Degree of Protection IP54

23 2.10 External Earthing Stud Yes 24 2.11 Hot Dip Galvanising of exposed

ferrous parts ESB 05030


Yes

25 Weight of single phase unit kg

26 2.12 Rating Plate (a) In English, indelible, corrosion proof

Yes

(b) Information per specification Yes

27 2.13 Are Type Test Certificates/Reports, included?

Yes

28 2.14 Insulating medium

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Oil volume litres Resin Kg/Litres Oil complies with ESB Specification 18020

29 2.01 Oil-immersed insulation Hermetically sealed Yes Oil expansion system to be a non corrosive metallic type and be impervious to moisture throughout its life

Yes

30 1.09 Warranty Period (a) All parts from delivery/commissioning

Years 1 and 2 per 1.09

(b) Defects in corrosion protection





Name of Company : _____________________ Position in Company : _____________________

Signature : _____________________

Date : _____________________

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______________________________________________________________________________________________

Schedule C: 20(10) kV Current Transformers

Item No.




CT or CT part of CT/VT

(a) Unit Single Phase (b) Housing State type (c) Internal insulating medium Oil / Resin kg weight of insulating medium kg (d) PCB content < 1 ppm (e) Water Hazard Class (f) Design Type (e.g. Hairpin, Top Hat etc)

Type

(g) Drawing No No. (h) Standard

4 2.02 Highest voltage for equipment kV 24 5 2.02 Rated Frequency Hz 50 6 2.02 Rated HV Insulation Level


kVpeak 125


kVrms 50

7 2.02 Creepage distance to earth Heavy pollution

(a) RUSCD (43.3mm/kV) For 20kV Voltages mm 600 For 10kV Voltages mm 350 (b) Corrected USCD mm (c) Insulator profile factors (d) Alternating sheds Yes/No (e) Spacing versus shed overhang (s/p)


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(h) Shed angle (α) degrees (i) Creepage factor (l/S) Very heavy pollution (a) RUSCD (53.7mm/kV) For 20kV Voltages mm 744 For 10kV Voltages mm 434 (b) Corrected USCD mm (c) Insulator profile factors (d) Alternating sheds (e) Spacing versus shed overhang (s/p)



(h) Shed angle (α) degrees (i) Creepage factor (l/S)

8 2.02 Partial discharge tests submitted by suppplier

Yes

9 2.02 Insulation level of secondary circuits

kV 2


Yes




12 2.05 Rated Primary Current A See Table 2 13 2.05 Extended Current Rating

Factor 1.2 See Table 2

14 2.05 Rated secondary current A 1 or 5A as per accompanying documentation

15 2.05 Ratios, including Primary Reconnection and Numbers of Secondary Windings

See Table 2

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16 2.05 Rated Characteristics for each Secondary Winding

16.1 Metering Windings No. of Windings See Table 2 Secondary Winding No. Output VA Accuracy Class Knee point voltage Icth / Extended Current Rating Secondary Resistance @ 75deg. C


Instrument Security Factor % 16.2 2.05 Protection Windings

No. of Windings See Table 2 Secondary Winding No. Output VA Accuracy Class Accuracy Limit factor

17 2.05 Ring CT Characteristics See Table 3 Rated Primary Current A

17.1 2.05 Extended Current Rating Factor

1.2 See Table 3

17.2 2.05 Rated secondary current A See Table 3 17.3 2.05 Ratios, including Primary

Reconnection and Numbers of Secondary Windings

See Table 3

No. of Windings Secondary Winding No. Output Accuracy Class Accuracy Limit factor


1,600A


Through Terminals (a) Static kN 2 (b) Dynamic kN 2.8

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Single Terminal (a) Static kN 1

20 2.10 Secondary Terminal Box (b) Earthing terminal for secondary earth

Yes

(c) Degree of Protection IP54 21 2.11 External Earthing Stud Yes 22 2.12 Hot Dip Galvanising of exposed

ferrous parts ESB 05030


Yes

23 Weight of single phase unit kg 24 2.13 Rating Plate

(a) In English, indelible, corrosion proof

Yes

(b) Information per specification Yes 25 2.13 Are Type Test

Certificates/Reports? Yes

26 2.14 Insulating medium Oil volume litres - Resin Kg/Litres - Oil complies with ESB Specification 18020 Yes

27 2.01 Oil-immersed insulation

Hermetically sealed Yes Oil expansion system to be a non corrosive metallic type and be impervious to moisture throughout its life

Yes

28 1.09 Warranty Period (a) All parts from delivery/commissioning


(b) Defects in corrosion protection





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______________________________________________________________________________________________


Signature : _____________________

Date : _____________________

Page 39 of 54



______________________________________________________________________________________________

Schedule D: 20(10) kV Voltage Transformers

Item No.




VT or VT part of CT/VT

(a) Unit Single Phase (b) Housing State type (c) Internal insulating medium Oil / Resin -kg weight of insulating medium

Kg

(d) PCB Content <1ppm (e) Water Hazard Class (f) Design Type (g) Drawing No No. (h) Standard

4. 2.02 Highest voltage for equipment

kV 24

5. 2.02 Rated Frequency Hz 50 6. 2.02 Rated HV Insulation Level


kVpeak 250


kVrms 95

7 2.02 Creepage distance to earth Heavy pollution

(a) RUSCD (43.3mm/kV) mm For 20kV Voltages mm 600 For 10kV Voltages mm 350 (b) Corrected USCD mm (c) Insulator profile factors (d) Alternating sheds Yes/No (e) Spacing versus shed overhang (s/p)


mm


(h) Shed angle (α) degrees

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______________________________________________________________________________________________

(i) Creepage factor (l/S) Very heavy pollution (a) RUSCD (53.7mm/kV) mm For 20kV Voltages mm 744 For 10kV Voltages mm 434 (b) Corrected USCD mm (c) Insulator profile factors (d) Alternating sheds (e) Spacing versus shed overhang (s/p)


mm


(h) Shed angle (α) (i) Creepage factor (l/S) degrees

8. 2.02 Partial discharge tests submitted by suppplier

Yes

9. 2.02 Insulation level of secondary circuits

kV 2


Yes


Yes

11 2.02 Short time withstand currents (a) Short time thermal current kA rms 12.5/20 (b) Duration secs 1 (c) Dynamic current kA peak 31.5/50

12 2.06 Rated Primary Voltage for 20kV Voltages

kV 24(14)kV/√3

13 2.06 Rated Voltage Factor 1.9, 8hr 14 2.06 Rated Secondary Voltage

(a) Star connected windings V 100/√3 (b) Residual voltage winding V 100/3

15 2.06 Number of Secondary windings

(a) Star connected windings 1 (b) Residual voltage windings 1

16 2.06 Rated Characteristics for each Sec Wdg

16.1 Wdg - Star Connected 100/√3V

See Table 2

Duty

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Output VA Accuracy Classes

16.2 2.06 Wdg - Residual Voltage 100/3V

Duty See Table 2 Output VA Accuracy Classes

17 2.06 3kV Bushing for HV Earth Connection with removable connection to adjacent Earth Terminal

Yes

18 2.06 n/a 19 2.06 Maximum cable capacitance

(per phase) that may be discharged.


µF


µF


µF


1,600A


Through Terminals (a) Static kN 2 (b) Dynamic kN 2.8 Single Terminal (a) Static kN 1

22 2.10 Terminal Box (a) HV Earth Connection Yes (b) n/a (b) Earthing terminal for secondary earth

Yes

(c) Degree of Protection IP54 23 2.11 External Earthing Stud Yes 24 2.12 Hot Dip Galvanising of exposed ferrous

parts ESB 05030


Yes

25 Weight of single phase unit kg

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25 2.13 Rating Plate 26 (a) In English, indelible,

corrosion proof Yes

(b) Information per specification

Yes

27 2.13 Are Type Test Certificates/Reports?

Yes

28 2.14 Insulating medium Oil volume litres - Resin Kg/Litres - Oil complies with ESB Specification 18020 Yes

29 2.01 Oil-immersed insulation Hermetically sealed Oil expansion system to be a non corrosive metallic type and be impervious to moisture throughout its life

Yes

30 1.09 Warranty Period (a) all parts from delivery/commissioning


(b) defects in corrosion protection


31

Transport Weight kg Erected Weight kg



Name of Company : _____________________


Signature : _____________________ Date : _____________________

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______________________________________________________________________________________________

Appendix 3 Deviations Schedule Where the plant offered deviates in any way from the clauses of this specification, attention should be drawn to the deviations below. Where there are no deviations, the Tenderer shall enter the words “No deviations” below. In this instance ESB will assume that the plant offered meets the specification in all respects


Name of Company : _____________________


Signature : _____________________ Date : _____________________

Appendix 4 Test Certificate Schedule

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______________________________________________________________________________________________

(a) On this schedule a list of the test certificates associated with the equipment shall be provided. This list shall include type test certificates and sample routine test reports. Each certificate shall be referred to the relevant specification clause and item of equipment to which the test applies.

Type Tests List Type Test Certificate and/or Routine Test Report (state N/A if test is not applicable to a particular item)

Power-frequency voltage withstand (dry & wet)

Lightning impulse voltage withstand

Artificial pollution

Partial discharge

Auxiliary and control circuits

Voltage test as condition check

Radio interference voltage

Measurement of the resistance of circuits

Temperature rise

Short-time withstand current and peak withstand current

Verification of the protection

Tightness

Electromagnetic compatibility

Operation at the temperature limits

Routine tests

Dielectric test on the main circuit

Dielectric test on secondary circuits

Measurement of the resistance of the main circuit

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______________________________________________________________________________________________

(b) Provide details of any changes made to the equipment since full type testing and details of the tests carried out to prove the change

Comments (if any)


Name of Company : _____________________

Position in Company : _____________________ Signature : _____________________

Date : _____________________

Creepage Distance

Partial Discharge

Tan delta

Change description List Type Test Certificate and/or Routine Test Report

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______________________________________________________________________________________________

Appendix 5 Special tools / Accessories On this schedule a list of the special tools or accessories that are required for the equipment shall be provided.

Comments (if any)


Name of Company : _____________________


Signature : _____________________ Date : _____________________

Item Number Description Price per item/set

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Appendix 6 Recommended spares On this schedule a list shall be provided of the spare parts which the supplier recommends should be held by ESB.

Item Number

Description Shelf life (years)

Price per item/set

Comments (if any



Signature : _____________________

Date : _____________________

Page 48 of 54



______________________________________________________________________________________________

Appendix 7 Corrosion Protection Schedules

(a) Full composition details of each aluminum alloy used:

Alloy number

Aluminum alloy details Components made from this alloy

1

2

3

4

5

6

(b) Corrosion protection applied to aluminum and aluminum-alloy parts:

Alloy number

Aluminum alloy details Details of corrosion protection used on this alloy

1

2

3

4

5

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(c) Exposed points on the equipment at which aluminum or aluminum-alloy parts are in contact with or in close proximity to other metals. Protection employed at each point to exclude air and moisture:

Point number Parts in contact or close proximity at this point

Protection applied at this point to exclude air and moisture

(d) Details of all painting systems used on the equipment:

Location/item Priming coat(s) Under coat(s) Final coat

Type of primer

No. of coats

NDFT in µm

Type of paint

No. of coats

NDFT in µm

Type of paint

No. of coats

NDFT in µm

Comments (if any) We confirm that we have read and understand the requirements of this Specification and we confirm the equipment is compliant with the clauses therein other than as detailed in our List of Deviations


Signature : _____________________

Date : _____________________

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______________________________________________________________________________________________

Appendix 8 List of Instrument Transformers in use on ESB system

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Table 1 – List of 38kV Instrument Transformers

Item Voltage Description Rated Primary Rated Secondary Accuracy Class Rated Output Icth / ECR Winding Type


(kV) (A/V) (A/V) (VA)

1 38 38KV ID VT 38 500 / √3 100 / √3 0.5 [3P] 50 Star 100 / 3 3P 25 Open Delta

2 38 38KV OD VT 38 500 / √3 100 / √3 0.5 [3P] 50 Star 100 / 3 3P 25 Open Delta

3 38 38kV OD CT 500-1000 5 5P20 30 1.2 5 5P30 30

4 38 38kV OD CT 125-250 5 5P20 30 1.2 5 5P30 30

5 38 38kV OD CT 250-500 5 5P20 30 1.2 5 5P30 30

6 38 38kV ID CT 125-250 5 5P20 30 1.2 5 5P30 20

7 38 38kV ID CT 250-500 5 5P20 30 1.2 5 5P30 30

8 38 38kV ID CT 500-1000 5 5P20 30 1.2 5 5P30 30

9 38 38kV ID CT 500-1000 1 5P30 30 1.2 1 5P30 30

10 38 38kV ID CT 250-500 1 5P30 30 1.2 1 5P30 30

11 38 38kV ID CT 1250 1 5P30 30 1.2 1 5P30 30

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(A/V) (A/V) (VA) 1 MV 20/10KV ID VT 20000-10000 100 1 50

2 MV 20/10KV OD VT 20000/√3-10000/√3

100 / √3 1 50 Star 100 / 3 3P 25 Open Delta

3 MV 20/10KV ID VT 20000/√3-10000/√3

100 / √3 1 50 Star 100 / 3 3P 25 Open Delta

4 MV 20/10KV OD VT 20000-10000 100 1 50 5 MV 20kV ID CT 200-400 5 5P20 30 1.2

6 MV 20kV ID CT 400-800 5 1 Fs5 20

1.2

5 5P20 15 5 5P35 10

7 MV 20kV OD CT 200-400 5 5P20 30 1.2

8 MV 20kV OD CT 400-800 5 1 Fs5 20

1.2

5 5P20 15 5 5P35 10

Table 2 – List of MV Instrument Transformers

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(A) (A) (VA) 1 MV (LV) OD Ring CT 400 5 5P30 30 1.2 2 MV (LV) OD Ring CT 1600 1 5P30 20 1.2 3 MV (LV) OD Ring CT 400 1 5P30 30 1.2

Table 3 – List of MV Ring Current Transformers

Page 54 of 54