STR-1371 SPECIFICATION FOR MEDIUM VOLTAGE CIRCUIT BREAKER … · 2014-06-18 · One three-pole, 36kV, 1250A SF6 gas insulated Circuit Breaker, vacuum or ... the Circuit Breaker, or

THE ISRAEL ELECTRIC CORPORATION LTD ENGINEERING DIVISION SPEC: STR-1371 SUBSTATION PLANNING SECTOR ANNEXURE “B”

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THE ISRAEL ELECTRIC CORPORATION LTD.

ENGINEERING PLANNING DIVISION

SUBSTATION PLANNING SECTOR

STR-1371

SPECIFICATION FOR

MEDIUM VOLTAGE CIRCUIT BREAKER AND CURRENTS

TRANSFORMERS FOR OUTDOOR INSTALLATION FOR

SUBSTATION/SWITCHING STATIONS

2014 Jenuary


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THE ISRAEL ELECTRIC CORPORATION LTD.

ENGINEERING PLANNING DIVISION

SUBSTATION PLANNING SECTOR

STR-1371

SPECIFICATION FOR

MEDIUM VOLTAGE CIRCUIT BREAKER AND CURRENTS

TRANSFORMERS FOR OUTDOOR INSTALLATION FOR

SUBSTATION/SWITCHING STATIONS

DRAFT FINAL DRAFT CONTRACT

NAME DATE SIGNATURE NAME DATE SIGNATUR

E

NAME DATE SIGNATUR

E

PREPARED P.Soloveichik 1.2014

CHECKED Z.Nir 1.2014

APPROVED A.Shachaf 1.2014


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TABLE of content

1. PURCHASER: ). ..................................................................................................4

2. NAME OF PROJECT.............................................................................................................4

3. Location of Project: ................................................................................................................4

4. SCOPE F WORK: ...............................................................................................................4

5. Terminal Points & Terminal Connection................................................................................6

6.Quality Assurance and Quality Control...................................................................................6

7.Standards and Codes................................................................................................................8

8.Technical Documentation ........................................................................................................9

9.Technical Requirements ........................................................................................................12

10.Tests & Inspections..............................................................................................................24

11.Packaging & Delivery..........................................................................................................25

12.Storage & Handling .............................................................................................................26

13.Nameplate & Marking .........................................................................................................26

14. Notes .........................................................................................................27

15.Special Requirements ..........................................................................................................27

QUESTIONNAIRE ……………………………………………..pages BB1-BB58

APPENDIXES

№1: Required tests for circuit breaker.

№2: Required tests for current transformers.

№3: Quality requirements Q-APP-02 rev.3.

№4: Steady-state, transient and fault conditions of a HV capacitor bank.

№5: Electrical standard specification. Control cubicles –

Electrical wiring requirements EPD-A.03.

№6: Reliability, availability, maintainability and safety (RAMS).

№7: Procedure for handling non-conformance.


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MEDIUM VOLTAGE CIRCUIT BREAKER AND CURRENT TRANSFORMERS FOR OUTDOOR INSTALLATION

TCHING STATIONSSWI/FOR SUBSTATIONS

1. PURCHASER: ). The Israel Electric Corporation Limited (IECo

2. NAME OF PROJECT: Medium voltage Circuit Breaker (CB) and Current

Transformers (CT) for outdoor installation.

3. Location of Project:

IECo Substations, Switching stations .

4. SCOPE OF WORK: Design, develop, manufacture, cooperate with others where necessary,

factory tests, supply all relevant civil engineering and electromechanical

information necessary for complete design of the CB and CT installation and for

all other purposes linked with proper operation as well as for commissioning and

maintenance, preserve, pack and furnish, delivery in Purchaser’s stores or sites,

test and verify equipment on site, provide technical guidance and assistance, all

in accordance with this Specification as detailed hereunder.

4.1 The Contractor shall supply the equipment according to following items:

Basic Order

4.1.1 Item 1 – Medium voltage three-phase Circuit Breaker and Current

Transformers as specified under sub clause 9.5.18 9.5.20

below.

CB and CT shall be used in 22 and 33 kV systems for breaking and making of

outgoing line and capacitor banks circuits.

CB and CT shall be a largely factory pre-assembled equipment for outdoor

installation.

Quantity: 32 units (+ 50%, -20%).

Components including in item 1:

� One three-pole, 36kV, 1250A SF6 gas insulated Circuit Breaker, vacuum or

SF6 gas interrupted type.

� One Operating Mechanism (three pole operation).

� Three Current Transformers (one per phase) with 2 cores

400/200/5/5A in each CT (one core for measuring and one core for

protection purposes). The Current Transformer may be whether


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bushing current transformer type, incorporated in the bushings of

the Circuit Breaker, or outdoor type, mounted separately on the

same frame with the Circuit Breaker and provided with suitable

connections between the Current Transformers and Circuit

Breaker terminals.

� Connections between the Circuit Breaker and Current Transformers

primary terminals.

� Base frame support structure for Circuit Breaker, Operating Mechanism,

Current Transformers and earthing devices.

4.1.2 4.1.2 Item 2 – Medium voltage three-phase Circuit Breaker and Current

Transformers as specified under sub clause 9.5.18 9.5.20

below.

CB and CT shall be used in 22 and 33 kV systems for breaking and making of

transformers infeed bays.

CB and CT shall be a largely factory pre-assembled equipment for outdoor

installation.

Quantity: 18 units (+ 50%, -20%).


� One three-pole, 36kV, 1600A SF6 gas insulated Circuit Breaker, vacuum or


� One Operating Mechanism (three pole operation).

� Three Current Transformers (one per phase) with 2 cores

1500/5/5A in each core of the CT is to be for protection purposes.

The Current Transformer may be whether bushing current

transformer type, incorporated in the bushings of the Circuit

Breaker, or outdoor type, mounted separately on the same frame

with the Circuit Breaker and provided with suitable connections

between the Current Transformers and Circuit Breaker terminals.

� Connections between the Circuit Breaker and Current Transformers

primary terminals.

� Base frame support structure for Circuit Breaker, Operating Mechanism,

Current Transformers and earthing devices.

4.1.3 Item 3 (Option) - Medium voltage single-phase Circuit Breaker as specified

under sub clause 14.1 (Electrical Data) below.

CB shall be used in the transformer's neutral earthing circuit (in parallel with

arc suppression coil).

CB shall be a largely factory pre-assembled equipment for outdoor

installation.


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Quantity: 36 units (+ 50%, -20%).


� One single pole, 36kV, 400A SF6 gas insulated Circuit Breaker, vacuum or


� One Operating Mechanism (single pole operation).

� Base frame support structure for Circuit Breaker, Operating Mechanism

and earthing devices.

4.1.3 Item 4 (Option) – Spare parts.

4.1.4 Item 5 (Option) – Special tools.

4.1.5 Item 6 (Option) –Commissioning.

5. Terminal Points & Terminal Connection

The Circuit Breakers and Current Transformers will be supplied with theirs

structural support and associated steel work , and will be installed and wired

in IECo substations by IECo technicians. The civil works for CB and CT

installation will be performed by IECo with the contractor's guidance .

6. Quality Assurance and Quality Control

6.1 General Quality Requirements

6.1.1 Quality Assurance

6.1.1.1 In addition to the provisions of the General Conditions Annexure "A" -

"CONTRACTOR'S DOCUMENTATION" and APPENDIX No 3 “QUALITY

REQUIREMENTS”, the Contractor's Quality Assurance Program shall meet the

requirements described in ISO Standard 9001.

6.1.1.2 The Purchaser shall have the right to audit and comment on

Contractor's Quality Assurance system regardless of whether it was previously

audited by a certifying agency or any other body.

6.1.1.3 The Contractor shall be responsible for assuring that his

subcontractor's Quality Assurance/ Quality Control Programs, including their

organizations, procedures, personnel qualification etc, are approved and are


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consistent with the specific requirements imposed by the Purchaser in the

Specification.

6.1.1.4 The Contractor warrants that the work will be of the best quality and

satisfactory to the Purchaser.

Materials and equipment shall be the best of their respective kinds, and shall

be new and unused in all cases and shall meet the performance and other

requirements of the Contract including this Specification.

6.1.2 Quality Control

6.1.2.1 An Inspection & Test Plan, including witness points and hold points, shall

be mutually agreed between the purchaser and the contractor immediately

after awarding the contract

6.1.2.2 Test and Inspection certificates as required in the Specification and the

applicable Standards, shall be submitted immediately following their issue.

The certificates have to be original, signed by the Contractor, and contain

actual measured values.

6.1.2.3 The generation of certificates, including those generated by Subcontractors

and sub-Bidders shall bear no extra cost to Purchaser.

6.1.2.4 Manufacturing shall not commence prior to respective drawing approval by

the Purchaser.

6.1.2.5 Changes in the Purchaser's approved design are normally unaccepted.

However, should such changes become necessary on an exceptional

basis, the Contractor shall obtain the Purchaser's approval prior to

introducing any change.

6.1.2.6 Any Equipment which does not conform to drawings, specifications or other

purchase order requirements which never the less are considered by the

Contractor as "acceptable as is" or for "repair", shall be submitted to the

Purchaser for approval, with their recommended dispositions. All such non-

conformances shall be approved by the Purchaser, shall be documented,

and a copy of the approval shall accompany each shipment.

6.1.2.7 Proficient, approved organizations or individuals, using documented

procedures shall conduct source inspection, including inspection of local

manufacturing. Any such independent inspector shall be subject to

Purchaser's approval.


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6.1.2.8 All materials used in the manufacture of the equipment shall conform to the

Specification, approved drawings and accepted Standards.

6.2 Interchangeability

The CB and CT of the same type and rating shall be respectively

interchangeable with each other, and when so interchanged, shall perform their

function equally well in every respect, both electrically and mechanically. All CB

and CT dismountable parts of the same type and ratings, shall be also

interchangeable, and when so interchanged, shall perform their function equally

well in every respect.

7. Standards and Codes

Unless otherwise specified the CB and CT and all its components shall be

designed, manufactured and tested in accordance with the requirements of the

latest relevant published standards of the International Electrotechnical

Commission (IEC). All aspects, tests, etc., not covered by the above-mentioned

standards, should be executed according to the latest published issue of official

or otherwise approved standards of Manufacturer's country. The Bidder shall

state all relevant standards.

In the event of a variance between the general requirements of the standards and particular requirements of this Specification, the Specification shall take precedence. The following standards are applicable in the relevant parts to the individual

components of the switchgear:

IEC 61869-2 Instrument transformer –Additional requirments for Current transformers.

IEC 60071 Insulation co-ordination. IEC 60085 Electrical insulation thermal evaluation and designation IEC 60137 Insulated bushings for alternating voltages above 1000V. IEC 60168 Tests on indoor and outdoor post insulators of ceramic

material or glass for systems with nominal voltages greater than 1000V.

IEC 60255 Electrical relays. IEC 60376 Specification of technical grade of new sulphur

hexafluoride for use in electrical equipment. IEC 60529 Degrees of protection provided by enclosure (IP code).


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IEC 60617 Graphical symbols for diagrams. IEC 62271-1 Common specification for high voltage switchgear and

control gear standards. IEC 60721/3-4 Classification of environmental conditions. IEC 61000 Electromagnetic compatibility (EMC). IEC 61462 Composite insulators – Hollow insulators for use in

outdoor and indoor electrical equipment. IEC 62155 Hollow pressurized and unpressurized ceramic and glass

insulators for use in electrical equipment with rated voltages greater than 1000V.

IEC 62271-100 High voltage alternating current circuit breakers. IEEE Std. 693 -2005 Recommended practice for seismic design of

substations. ISO 9001-2000 Quality management systems. ISO 17025 General requirements for the competence of testing and

calibrating laboratories. ASTM A 123 Standard specification for zinc coating (hot-dip) on iron

and steel hardware. ASTM B 579 Standard specification for electrodeposited coatings of

tin-lead alloy (solder plate). ASTM B 580 Standard specification for anodic oxide coatings on

aluminum. ANSI C37.082 Equipment sound level. IEC 60815 Selection and dimentining of high voltage insulators

intended for use in polluted conditions.

8. Technical Documentation

8.1. General

During the tender process, IECo, on its own discretion, may ask to receive additional

technical documents relevant to the bidder’s proposal. The bidder will be obliged to

submit the documents according to a specified time.

8.2 Technical Documents to Accompany the Proposal

The Contractor should submit with the proposal the following documents and

information in eight (8) copies, and four (4) compact discs in PDF (DWG for

drawings) format:

8.2.1 Questionnaire: All Clauses.

8.2.2 Quality Assurance documentation

Quality Assurance related documentation, according to the Appendix No.3:

"PROCUREMENT QUALITY REQUIREMENTS" (spec. No: Q – APP – 02)

should be submitted for information. Particularly the following:


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• Certification of Approval of the Quality Assurance System according to the

ISO 9001 Standard given by an Authorized Inspection Agency.`

• Qualification of Subcontractor's Procedure.

• List of qualified Bidders of the most important parts and components.

• A preliminary Inspection and Test Plant (I&T plan).

8.2.3 Drawings and tests

a. Detailed schemes and wiring diagrams of the CB and CT.

b. A sample of final factory test reports of similar CB and CT.

c. Type test reports for offered CB and CT including test circuit, instruments

and description of method.

d. Specific test report (authority, number and date) for offered CB and CT.

e. Manufacturer's requirements for storage (6 mounth) before erection.

f. Reference list for basic order and options for the last five years.

g. Drawings and description of packing, handling and storage.

h. A list of recommended testing equipment for the offered CB and CT.

i. A list of recommended special tools and instruments necessary for

maintenance and repair.

j. A list of recommended spare parts (including total quantities, catalog

numbers, and drawings) and the guaranteed availability period.

k. A list of all parts which could wear out after five (5) years and ten (10) years

of operation according to Supplier or users experience.

l. Instruction book for erection, operating and maintaining.

m. Bidder may be required to send his representative to discuss and/or explain

parts of his proposal with IEC's representatives.

All the drawings and information submitted with the proposal shall be final drawings

and final information approved by the Bidder.

8.2.4 Evaluation of Contractor’s Technical Proposal

8.2.4.1 Bidder’s offered data and parameters as well as definite answers or

comments will be evaluated from a technical point of view using a

computer program for decision-making. The decision making process

consists of identifying all relevant criteria and attaching to each criterion an

appropriate weight for technical evaluation. All proposals (alternatives)

made by different contractors will be evaluated taking into account the

same relevant criteria.

8.2.4.2 The main criteria used for the technical evaluation are according to the

main paragraphs in this Specification.


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8.2.4.3 The evaluation will be carried out according to a decision tree based on the

bidder's answers to the Questionnaire

8.2.4.4 Bidders are required to meet the COMPALSORY REQUIREMENTS set

forth in this specification, which are marked in the questionnaire as ©.

Such requirements are deemed by IECo to be central to the purpose of this

purchasing process. Failure to meet the compulsory requirements shall

entitle IECo to disqualify the proposal. Without derogation therefrom, the

IECo shall have a right to disqualify a proposal, at its discretion, on any

technical and/or commercial grounds. A bidder whose proposal is

disqualified in the course of stage 1 (technical stage) will not be permitted

to participate in stage 2 (price proposal).

8.2.4.5 The bidders are not entitled to ignore any of the sub clauses of the

Questionnaire. IECo is entitled to disqualify any bidder that will ignore any

of the sub clauses.

8.3 Technical Documents After Notification of Award

8.3.1 After notification of award, Contractor shall submit to the Purchaser for

approval, within 30 days of the date of award (4) four sets of prints, and

four (4) compact discs in PDF (DWG format for drawings) format, covering

the following information:

8.3.2 If the prints are returned by the Purchaser and stamped "Approved Except

as Noted", the contractor shall correct the drawings according to

Purchaser's demands and shall resubmit for approval required copies of

the corrected drawings as stated above.

8.3.3 After approval of the above drawings, but not later than one (1) month

after the date of award, Contractor shall submit to the Purchaser the

following:

8.3.4 Four (4) sets of complete instruction books as may be required for erecting,

operating and maintaining equipment, and four (4) compact discs with the

complete instruction books in PDF format, drawings in DWG.

8.3.5 Wiring diagrams including terminal notations.

8.3.6 Drawings that show the terminal blocks and connectors for on-site external

connections.


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8.3.7 The terminals and connectors shall be clearly numbered and shall appear

on the schematics as well as on the wiring diagrams.

8.3.8 If the CB and CTs include items that shall be separately mounted (as

relays, etc.) outline drawings, schematic and wiring diagrams shall be

provided for each of those items.

8.3.9 The Purchaser reserves himself the right to reject equipment not

manufactured according to approved drawings.

8.3.10 Contractor shall complete engineering details immediately after award of

contract regardless of shipping date.

8.3.11 Contractor is free to supply any additional information considered

necessary to clarify various aspects of operation, maintenance etc.

8.3.12 Purchaser reserves himself the right to request all necessary additional

data, descriptions, drawings, etc., that may contribute to complete the

information supplied by the contractor.

8.3.13 All data and descriptive material in the above drawings and instruction

books shall be in English. All dimensions to be shown in metric units.

8.3.14 Contractor may be required to send his representative to discuss and/or

explain parts of his documents/drawings with IEC's representatives.

9. Technical Requirements

9.1. Environmental Considerations & Service Conditions

9.1.1 Environmental Conditions

Operating temperature range:

� Maximum (deg. C) +55

� Minimum (deg. C) - 5

� Relative humidity:

Annual average, (%) 75

High-relative humidity during 30 days, (%) 95

Permissible altitude above sea level, (m) 1000


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9.1.2 SYSTEM DATA

The CB and CT shall be suitable for operation in 22kV and 33kV IECo systems

with following data:

SYSTEM DATA 22 kV

System

33 kV

System

9.1.2.1 Rated system voltage (line to line)………(kV)

22 33

9.1.2.2 Highest system voltage (line to line)….…(kV)

24 36

9.1.2.3 Highest system voltage (line to ground)...(kV)

13.85 20.78

9.1.2.4 Maximum phase to ground voltage in case of earth fault………………………………...…(kV)

24 36

9.1.2.5 Rated frequency…………………...………(Hz)

50 50

9.1.2.6 Range of frequency variation……...……..(Hz)

50.5-47.2 50.5-47.2

9.1.2.7 System neutral …………….…………………...

Via Petersen coil٭ or via grounding

transformer or solidly earthed

Via Petersen coil٭ or solidly

earthed

9.1.2.8 Fault duration (three phase fault, sec)……….

3 3

9.1.2.9 Fault duration (single phase fault, hours)…....

8 8

9.1.2.10 Line auto-reclosing policy……………………...

Tree-phase Two shots

Tree-phase Two shots

9.1.2.11 Rated short-circuit capacity…………....(MVA)

750 750

9.1.2.12 Steady-state, transient and fault conditions of a HV capacitor bank …………………………..

See Appendix 4, sub clause 1

Might be occasionally solidly grounded for short periods of time ٭


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9.1.3. Seismic Qualification Level

9.1.3.1 Seismic qualification test shall prove that the equipment will operate fully

satisfactory during and after earthquake with ground acceleration 0.5g acc.

To IEEE 693.

9.1.3.2 Qualification by test is to be moderate level.

9.1.3.3 Qualification by combined test and dynamic analysis.

9.1.3.4 Contractor is required to submit a test report to prove the qualification level

and dynamic analysis report.

9.1.3.5 The dynamic analysis report shall be acc. To IEEE 693 and shall take into

consideration:

9.1.3.6 Damping ratio (%)

9.1.3.7 Natural frequency in x,y,z directions (Hz)

9.1.3.8 Resonant frequency in x,y,z directions (Hz)

9.1.3.9 Qualification by test is to be moderate level.

9.1.3.10 eismic qualification of equipment is acc. To IEEE 693/2005.

9.1.3.11 ualification level acc. To IEEE 693/2005 is moderate level.

9.1.4 Electromagnetic Environment

The PMUs shall withstand an electromagnetic environment having the

following maximum severity levels according to IEC 60255-22 part 1,2,3,4

9.1.4.1.1 Severity level for electrostatic discharge (KV) 4

9.1.4.1.2 Severity level for radio frequency interference (V/m) 10

9.1.4.1.3 Severity level for electrical 1MHZ burst disturbance (KV) 2.5

9.1.4.1.4 Severity level for fast transient (KV) 2

9.1.5 Supply voltages for protection and controls:

DC supply for protection – 220V (range: -20% to +10%)

DC supply control and alarm – 60V (range: -20% to +10%)

AC auxiliary voltage – 240V (range: -10% to +10%)

9.2. Reliability, Availability and Maintainability (RAM)

The Supplier is requested to fill in the enclosed APPENDIX 6 “Reliability and

Maintainability requirements” based on relevant information from users. Supplier

shall describe the system of relevant data collection from users. This data is to

establish the Contractor’s reliability statements.


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9.3. Functional requirements

9.3.1 Functional requirements of the circuit breaker and current transformer (Item 1 )

The circuit breakers and current transformers will be installed in an outdoor

medium voltage switchgears (22KV or 33KV ) . The circuit breakers will

switch the line feeders and the capacitors banks feeders. The circuit breaker

is to be One three-pole, 36kV, 1250A SF6 gas insulated Circuit Breaker,

vacuum or SF6 gas interrupted type. The Circuit Breaker will be one

Operating Mechanism (three pole operation). Circuit breaker shall be restrike

free during capacitive current breaking duty. CB and CT shall be a largely

factory pre-assembled equipment for outdoor installation.

The CB Rated operating sequence is O – 0.3s – CO – 60s – CO.

The wear out of the CB should not derogate in 1000 operations per year

switching capacitors currents.

The current transformers will measure the intensity of the current for either

protection or measuring purposes . The current transformers set will be

comprise of three Current Transformers (one per phase) with 2 cores with

current ratio 400/200/5/5A in each CT. One core will be design for measuring

purposes , the second core will be designed for protection purposes.

9.3.2 Functional requirements of the circuit breaker and current transformer (Item 2 )

The circuit breakers and current transformers will be installed in an outdoor

medium voltage switchgears (22KV or 33KV ) . The circuit breakers will

switch the coupler bays and transformers infeeds. The circuit breaker is to be

One three-pole, 36kV, 1600A SF6 gas insulated Circuit Breaker, vacuum or

SF6 gas interrupted type. The Circuit Breaker will be one Operating

Mechanism (three pole operation). Circuit breaker shall be CB and CT shall

be a largely factory pre-assembled equipment for outdoor installation.

The current transformers will measure the intensity of the current for either

protection or measuring purposes . The current transformers set will be

comprise of three Current Transformers (one per phase) with 2 cores with

current ratio 1500/5/5A in each CT. The two cores will be designed for

protection purposes.

9.3.3 Functional requirements of the circuit breaker (Item 3 )

The circuit breakers will be installed in an outdoor medium voltage

switchgears (22KV or 33KV ) . The circuit breakers shall be used in the


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transformer's neutral earthing circuit (in parallel with arc suppression coil). The

circuit breaker is to be One single -pole, 36kV, 400A SF6 gas insulated Circuit

Breaker, vacuum or SF6 gas interrupted type. Circuit breaker shall be largely

factory pre-assembled equipment for outdoor installation.

9.3.4 Functional requirements of the circuit breaker (Items 1,2,3 )

9.3.4.1 Circuit breaker shall be safe for protecting and interrupting the circuit.

9.3.4.2 Circuit breaker shall be able to break any current up to the rated breaking

current at any voltage up to the maximum rated voltage

9.3.4.3 Circuit breaker shall have an extended mechanical endurance capability.

9.3.4.4 Circuit breaker shall be designed for extended electrical endurance.

9.3.4.5 Circuit breaker shall have a monitoring system to ensure that all breaker

poles in each phase are either open or closed.

9.3.4.6 The circuit breaker shall be operated by an electrical operating mechanism.

The closed or open position of the main contacts shall not change as a

result of loss of the energy supply or reapplication of energy supply.

9.3.4.7 The circuit breaker shall be so constructed that it cannot come out of it

open or closed position by external forces as gravity, vibration,

electromagnetic forces etc.

9.3.4.8 The operating mechanism shall be designed to absorb any shock incident

to the operation of the circuit breaker with minimum resultant disturbance,

jar and noise.

9.3.4.9 The operating mechanism shall be designed for successful local and

remote electrical control and local manual control. The manual tripping

device shall be protected against accidental operation.

9.3.4.10 The stored energy shall be sufficient to provide for the performance of the

rated operating sequence at all currents up to the rated short circuit

current.

9.3.4.11 In case the stored energy is not sufficient for the completion of a closing or

tripping operation, the operating mechanism shall be blocked and an alarm

shall be given. Any operation already started shall be carried out to the

end.

9.3.4.12 Automatic recharging of the closing mechanism shall be provided for

renewed operation immediately after completion of a closing operation.


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9.4 Properties

9.4.1 SPECIAL REQUIREMENTS FOR ENVIRONMENTAL PROTECTION

Due to the severe environmental conditions to which the equipment may be

subjected during service life, the following requirements for its protection form an

integral part of the Specification and are in addition to the standard design and

protective measures which the Manufacturer would normally invoke for these

conditions:

9.4.1 Bolts, nuts and washers as well as components such as springs, pins and

those for which a tight maintained dimensional tolerance is required shall be

made of stainless steel. The preferred stainless steel is an austenitic grade;

however, if physical requirements are overriding, other stainless steel grades

will be acceptable.

Austenitic grade will be subject to a solution quench. Prior to being placed into

service all stainless steel components will be cleaned and passivated.

9.4.2 When dimensionally and functionally allowable, all structural support and

associated steelwork of the equipment shall be hot-dip galvanized according to

ASTM A 123. The thickness of the zinc shall be at least 100µm on average, but

the minimum thickness shall be not less than 90µm.

If dimensional or functional requirements do not allow hot-dip galvanizing, steel

parts will be electrolytically zinc plated to a minimum measured thickness of

20µm.

9.4.3 All exterior surfaces of the equipment shall be coated with a corrosion inhibitor

type primer, an intermediate and a finish coat. The total paint thickness shall not

be less than 150µm.

9.4.4 A small quantity of touchup paint, identical to the specific finish coat, shall be

furnished with the equipment.

9.4.5 All aluminum components shall be fabricated from grades of aluminum which

show resistance to salt spray and moist conditions, e.g., Al-Mg base alloys.

Al-Cu alloys are not acceptable. After fabrication all aluminum components

shall be anodized according to ASTM B 580 (reapproved 1995) Type A.

9.4.6 All copper or copper alloy components shall be electrically tinned according to

ASTM B 579 (reapproved 1993) Service condition SC4.


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9.4.7 Environmental conditions shall not cause corrosion or deterioration of the

gaskets and/or material of gasket joints. All interiors of enclosures, panels,

cabinets, etc. which are not of corrosion resistant metal, shall be thoroughly

cleaned, primed and painted.

9.4.8 All components shall successfully withstand in operation the climatic and

environmental conditions as defined under sub clause 9.1.

9.4.9 Manufacturer is requested to describe or indicate deviations (see sub clause

9.1) from above requirements. In case no deviations are mentioned it will be

understood that Manufacturer's offer entirely complies with the above

mentioned requirements.

9.5 Design & Construction

9.5.1 The equipment shall be of integrated modular construction in order to achieve

economy of installing space.

9.5.2 Welded and/or bolted connections of the equipment steel structure are

acceptable, but field assembly of separate sections should be done by bolting.

Field welding is not acceptable.

9.5.3 All electrical safety clearances shall conform to IEC Recommendations.

The SF6 gas shall comply with provisions acc. to IEC 60376. 9.5.4 Temperature of water vapor content in SF6 gas in the installed equipment

determined acc. to IEC 60376 not more than 1 (°C).

9.5.5 The insulating capacity of the gas filled in the CB shall be monitored

simultaneously with Temperature compensated gas density monitors and

Pressure monitoring devices for each phase separately. The monitoring device

shall have the following setting levels: SF6 loss, General lock-out and Dry

contact for remote alarm.

9.5.6 The CB shall have constructional measures for controlling moisture increase in

SF6 gas or to remove the impurities: Static and dynamic filters , Desiccants ,

Driers. These constructional measures shall be provided as permanent

facilities, preferably arranged so that they can be removed, replaced or

recharged without having to take the CB out of service.

9.5.7 Each CB shall be provided with a gas supply connection to permit evacuation

or refilling with gas. The SF6 gas supply connection for the gas compartments

shall be appropriate to connect the mobile DILO gas refilling devices type 3-

019, 3-041, 3-020 and 3-061.


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9.5.8 All gas seals shall be designed to ensure that leakage rates are kept to an

absolute minimum under all normal pressure, temperature, electrical load and

fault conditions. The seals shall not deteriorate when exposed to the gas and

vapors as well as to temperature variations and mechanical forces that can be

expected.

9.5.9 The CB and CT shall be supplied with all the steelwork necessary for fixing

and supporting the CB and CT equipment.

9.5.10 All steel supports have to be hot-dipped galvanized.

9.5.11 The circuit breaker and the current transformers shall be provided with tin plated

copper terminals.

9.5.12 The connection between the circuit breaker and the current transformers shall

be included in the Contractor's scope of supply.

9.5.13 All metallic parts of the CB and CT normally not energized (enclosures,

supports, bases, pipes, doors, etc.) shall be included in the earthing circuit.

9.5.14 The continuity of the earthing circuit shall be ensured taking into account the

thermal and electrical stresses caused by the fault current they may have to

carry.

9.5.15 The ground pads shall be copper faced.

9.5.16 The ground pads and the earthing connections shall be designed to withstand

a short time (3 sec) current of 20 KA.

9.5.17 The maximum potential difference between any point of the equipment and

nearest ground pad or between any two points of adjacent equipment shall not

exceed for the maximum internal or external design fault current 65 (V).

9.5.18 The CB , CT Rated data shall be :voltage 36 kV; current 1250A - item1

1600A – item2 400A – item 3 ; frequency 50 Hz; short-time withstand capacity

750 MVA ; short-time withstand current 20kA r.m.s.; peak withstand current

50kA ; duration of short-circuit- three phase fault 3 sec- Single phase to earth

8 hours .

9.5.19 Rated supply voltage of closing and opening devices and auxiliary and control

circuits 220 (+10%, -15%) VDC.

9.5.20 Rated insulation level:

9.5.20.1 Rated short-duration power-frequency withstand voltage – common value

70 kV r.m.s

9.5.20.2 Rated short-duration power-frequency withstand voltage– across the

isolating distance 80 kV r.m.s.

9.5.20.3 Rated lightning impulse withstand voltage – common value 170 kV peak

9.5.20.4 Rated lightning impulse withstand voltage – across the isolating distance

195 kV peak

9.5.20.5 The circuit breaker operating mechanism shall be one spring energized. 9.5.21 The operation motor shall be protected with a thermal magnetic type overload

protection device. 9.5.22 The motor circuit shall be provided with means for disconnecting the motor

and the protection devices from the power supply. The disconnecting means


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shall be enclosed in suitable housing, even if located inside the operating mechanism cabinet.

9.5.23 Local/remote selector switch shall interrupt all circuits, including those of the trip coil for control purposes, but shall not interrupt the circuits used for protection purposes.

9.5.24 The selector switch local/remote shall have two free close contacts at local position for alarm.

9.5.25 Circuit Breaker shall be provided with an electrical positioning indicating device with the following functions: Position 1 - CB closed ; Position 2 - CB open ; Position 3 – no voltage

9.5.26 Circuit Breaker shall be provided with a mechanical positioning indicating device to indicate clear whether a CB is in open or closed position.

9.5.27 The operating mechanism with its control relays shall afford the equivalent of trip-free and anti-pump features, and shall be so connected that the closing mechanism will be automatically become inoperated after and while the breaker is closed, regardless of the position of the control switch. The closing mechanism will not become inoperated until the breaker has had enough time to complete the operation of closing. It shall be impossible to operate the closing mechanism again, until the operator has first moved the breaker control switch to the manual position.

9.5.28 Control relays supplied with the CB shall be heavy-duty, plug-in-type, with dust tight covers. Where practical, they shall be arranged to break both polarities of the control circuit.

9.5.29 The following alarms shall be provided as a minimum with one dry potential free contact : Abnormal density of SF6 gas system (low density, minimum breaking density/pressure, minimum dielectric density ; Abnormal spring stretching ; Undervoltage in motor supply circuit (with time delay) ; Undervoltage for direct current control circuits ; Failure of any essential part of the operating mechanism and motor protection.

9.5.30 The degree of protection of the operating mechanism cabinet is to be IP55. 9.5.31 Spring mechanism shall be provided with electrical and mechanical interlocks

against undesired operation resulting from a mechanical fault. 9.5.32 Heaters shall be provided in operating mechanism to prevent condensation.

The heaters shall be provided with thermostat. 9.5.33 Auxiliary switches shall be supplied with and directly operated by the operating

mechanism to indicate positively whether the circuit breaker is open or closed. The number of normally open (NO) and normally closed (NC) contacts for Purchaser's use shall not be less than 8NO + 8NC. All these contacts shall be wired to terminal block in the operating mechanism. The auxiliary switches shall be easily accessible for connection, inspection and adjustment The auxiliary switches. shall be clearly and durably marked. The auxiliary switches. rated voltage is 220 VDC ; breaking current at 220 VDC and a current time constant L/R=40 msec at least 2A ; making current at 220 VDC at least 16A.

9.5.34 All wiring for auxiliary and operating devices for connection to Purchaser's cable shall be terminated at termination blocks, enclosed in the operating mechanism cabinet. The wiring shall comply with IECo standard EPD-A.03 (see Appendix 5).

9.5.35 The current transformer shall comply with the requirements of IEC 61869-2. 9.5.36 The change in ratio of the CT shall be made by secondary reconnection.


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9.5.37 The secondary windings of the CT (including taps) shall be wired to barrier type terminals accommodated in a terminal box mounted directly on the current transformer.

9.5.38 Provisions shall be made for earthing of the secondary the CT windings inside the terminal box.

9.5.39 Each current transformer shall be properly identified with polarity marking. 9.5.40 The secondary windings shall be wired from terminal box on the CT to block

terminals in the operating mechanism. 9.5.41 The CT rated voltage - 36 kV. 9.5.42 The CT rated power-frequency withstand voltage - 70 kV r.m.s 9.5.43 The CT rated lightning impulse withstand voltage - 170 kV peak. 9.5.44 The CT rated frequency - 50(Hz). 9.5.45 The CT rated short-time withstand capacity - 750MVA. 9.5.46 The CT rated short-time withstand current - 20kA r.m.s. 9.5.47 The CT rated peak withstand current - 50kA peak. 9.5.48 The CT rated duration of short-circuit : Three phase fault - 3sec ; Single phase

to earth – 8 hours. 9.5.49 The CT Item 1 ratings Core 1 (measuring): ratio - 200-400/5 ; Extended

current rating - 120% ; output -30VA ; Accuracy class- 0.5 ; Instrument security factor – 5.

9.5.50 The CT Item 1 ratings Core 2 (protection): ratio - 200-400/5 ; Extended current rating - 120% ; output -30VA ; Accuracy class- 5P20.

9.5.51 The CT Item 2 ratings Core 1&2 (protection): ratio - 1500/5 ; Extended current rating - 120% ; output -30VA ; Accuracy class- 5P20.

9.5.52 The connection of the CB and CT to the HV equipment will be achieved by bushings.

9.5.53 The bushings shall be designed for service conditions stated in sub clause 9.1 of this specification and tested according to IEC 60137.

9.5.54 The hollow insulators shall be porcelain type. Other types of the insulator (for example: composite type, porcelain protected by silicon rubber coatings) may be acceptable.

9.5.55 Color of the insulator is to be brown or grey. 9.5.56 Heavy duty, high grade, high creepage path type insulator for outdoor

installation, suitable for the service conditions as described under sub clause 9.1 (pollution zone III as defined by IEC 60815) shall be provided.

9.5.57 The insulator shall be of the alternate sheds type or normal sheds type permitting easy access for greasing and cleaning to all surfaces.

9.5.58 The insulator shall be only "windformed" type, not drop shaped type. 9.5.59 Minimum phase to ground external creepage distance (25 mm/kV) is to be

900mm. 9.5.60 Arcing distance not less than 350mm. 9.5.61 Failing load bending (F )- 4000N 9.5.62 Guaranteed mean value of failing load 120%F not less than – 4800N. 9.5.63 Minimum distance from ground to upper metallic part of the support structure

of the CB and CT (insulator base to ground) shall be at least 2500mm. 9.5.64 Minimum distance from ground to live metallic parts of the CB and CT

mounted on the support structure shall be at least 3000mm. 9.5.65 Distance from ground to the center of operating mechanism is to be 1200-

1400mm.


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9.6 Commissioning (Item 6 – Option)

Optional On-site commissioning of the circuit breakers and current transformers, prior

to putting into service may be required.

9.7 Operation & Maintenance

9.7.1 General

9.7.1.1 All mechanical couplings, contacts and other mechanism shall be adjusted and tested at the factory so that no such work is necessary in the field.

9.7.1.2 Bidder is to specify which individual part should be treated in the field before and during assembling, and to specify man-hours required for in the field works.

9.7.1.3 Bidder is to specify the time interval between required inspections and the man-hours required for periodical inspections.

9.7.1.4 Bidder is to specify the time interval between successive maintenance works and the man-hours required for maintenance works.

9.7.2 Spare & Renewal Parts

9.7.2.1 The Contractor shall indicate in the Proposal the life duration of the

equipment as a whole and the normal replacement cycle of the

component parts.

9.7.2.2 The Contractor shall include in its technical proposal a catalogue

containing all relevant potential Spare Parts for the proposed

equipment as well as propose a detailed list of Spare Parts

recommended for:

� The short term: start-up, commissioning and until expiration of

the warranty period.

� The long term: spare parts for periods of five (5) years as of the

end of the warranty period, and ten (10) years as of the end of

the warranty period.

9.7.2.3 Wear out components such as batteries electrolytic capacitor etc.,

maintenance and replacement policy is to be detailed in the bidder's

offer. The details are to include life span of the components,

replacements procedure etc.

.


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9.7.2.4 The catalog and the lists shall include for each item:

� Item description and item designation.

� Likelihood that the part will be required for replacement during

each relevant period (short term, long term).

� Name of Bidder and Manufacturer.

� Necessary catalogue data for separate order.

� Optimal stocking level.

� Lead time before supply (including transport time to Israel).

9.7.2.5 The Contractor shall identify the materials and items that have critical

effects on the System’s reliability and items that required special

maintenance treatments.

9.7.2.6 Purchaser shall review the catalogue and the lists of recommended

Spare Parts during the technical clarifications.

9.7.2.7 Upon Purchaser’s demand, each participant shall be required to

provide to Purchaser amended lists and catalogue, as part of its final

technical offer.

9.7.2.8 Based on participant’s catalogue, the Purchaser may prepare, prior to

submittal of price proposals, a list of representative Spare Parts with

equivalent functionality for evaluation purposes only.

9.7.2.9 As part of its price proposal, each participant shall quote a price for

each item in the catalogue and the recommended Spare Parts lists,

and shall include a long-term price escalation formula.

9.7.2.10 Evaluation of participant’s price proposals shall include comparison of

the representative list for each participant, with each participant’s

prices inserted therein.

9.7.2.11 Purchaser will not be required to purchase spare parts in accordance

with the representative’s list but rather in accordance with the

provisions set forth in the Agreement regarding the Spare Parts

option.

9.7.2.12 The catalogue provided by the participant with prices inserted therein

and the escalation formula shall be attached as an Annexure to the

Contract and shall be the basis for exercising the Spare Parts option.


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9.7.2.13 After Contract execution and during the drawing approval process, the

Contractor shall provide Purchaser with the following details regarding

each item in the catalogue:

a) Identity of manufacturer (if not previously known);

b) Bidder’s part number;

c) Manufacturer’s part number;

d) Name of recommended alternate Bidder and part number;

e) Detailed description of each item as required for ordering

(if not previously provided);

f) Whether the part is repairable or not;

g) Short term and long term storage instructions.

h) MTBF.

The above information shall be transmitted to Purchaser as a

computer database allowing for easy searches.

9.7.2.14 All Spare Parts shall be new and unused in all cases.

9.7.2.15 The Purchaser reserves the right to purchase said parts directly from

the manufacturer or from another sub-Bidder.

9.7.2.16 The Contractor guarantees that all the Spare Parts features will be

according to its catalogue and that the catalogue is periodically

updated to stay current.

10. Tests & Inspections

10.1 The Contractor shall carry out tests to prove satisfactory operation of all CB

and CT components as well as their co-ordinate operation as a whole. The

tests will be an integral part of the quotation.

10.2 The Purchaser will have the right to demand acceptance tests at the

manufacturer's facility with or without a representative of the Purchaser

being present; a written notice shall be given thereof at least 21 days in

advance of the date of the FAT. The acceptance test results will be

considered an integral part of the equipment delivery. A detailed protocol

thereof shall be forwarded to the purchaser on demand.


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10.3 Contractor shall perform production tests on relays and related equipment

components to check the uniformity of the workmanship and materials used

in the manufacture.

10.4 To prove that the equipment has the capability to meet all requirements as

specified, the Contractor shall submit three (3) sets, and two (2) compact

discs in PDF format, of all type and routine test reports performed on

protection components and relays. The relevant standards, norms,

recommendations etc. are to be specified.

10.5 Contractor shall submit a list of tests to be performed on site, after mounting

of the equipment.

10.6 The CB and CT shall be tested, and test reports shall be submitted.

11. Packaging & Delivery

11.1 The equipment package for shipment shall be so designed and carried

out as to prevent any damage to equipment during shipment and during

prolonged (6 months) storage. under the following climatic and

environmental conditions:

Air pressure equivalent to altitude not exceeding 1000 m.

a. Ambient temperature up to 50° C.

b. Direct and continuous exposure to brilliant sun.

c. Sever atmospheric and industrial air pollution.

d. Salt spray and/or sand dust.

e. Long dry periods.

f. Long periods of high humidity and rain.

11.2 Each shipping container shall have a packing list and, in addition, shall

be marked with the following information:

a. Descriptive name(s) of equipment or supplies contained.

b. Quantity packed in container.

c. Serial numbers, if any, of the equipment contained.

d. Contract number.


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e. Contractor's name and address (city, state, and country).

f. Gross weight of container.

g. Cubic volume of container.

h. Complete destination marking.

i. Order number

11.3 Each of the items shall be separately packed and the destination clearly

marked.

11.4 Special care for ensuring air, moisture and water-tight packing for the

equipment as insulation, shall be ensured for a prolonged period (6

months) under the climatic and environmental conditions described above.

11.5 The Manufacturer shall state his own requirements for the storage of

equipment for a prolonged period (6 month), the outdoor ambient

conditions being those under Clause 9.1.

11.6 Packing List

11.6.1 The serial numbers of each piece of equipment included in the

shipment will be indicated on the shipment's packing list.

11.6.2 . The packing list will be supplied in two formats, as follows:

11.6.3 A printed copy of the packing list will be attached to all shipping

documents (standard practice);

11.6.4 A file of the packing list in digital format, created under any commonly-

used application which affords:

11.6.5 Locating the serial numbers by means of the Edit/Find command;

11.6.6 Copying the serial numbers by means of the Edit/Copy command.

11.6.7 Examples of such applications: Microsoft Word, Microsoft Excel,

Portable Document Format (.pdf), etc.

12. Storage & Handling

The equipment will be stored up to one year in IECo stores. See clause 11.1 for

storage conditions.

13. Nameplate & Marking

All the equipment items are to be provided with nameplates.


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13.1 Each circuit breaker and its operating mechanism shall be provided with a corrosion proof nameplate, of suitable material including the data in accordance with IEC 62271-100 Table 6. 13.2 The CB nameplate is to include the following data: Rated duration of short circuit ; Rated single capacitor bank breaking current ; Rated back-to-back capacitor bank breaking current ; Rated back-to-back capacitor bank inrush making current ; Date of manufacture ; Classification. 13.3 Each current transformer shall be provided with a corrosion proof nameplate, of suitable material including the data in accordance with IEC 61869-2. 13.4 The CT nameplate is to include the following data: Rated short-time withstand current ; Rated peak withstand current ; A diagram showing the use of each secondary winding and its corresponding terminal markings ; Date of manufacture ; Number of standard.

14. Notes

Not relevant.

15. Special Requirements

15.1 Information after Purchase

Contractor shall keep Purchaser informed about all improvements, developments,

changes, faulty operation and remedies applied in the construction of the CB and

CT components, by means of necessary informative materials, after the purchase of

the CB and CT.

15.2 Technical Support after Purchase

The Contractor is to provide the required information to enable repairs to the

equipment to be carried out on site.

In case on site repair is not possible, the manufacturer shall be responsible for the

repair, at manufacturer works.