1

ASSAM POWER DISTRIBUTION COMPANY LTD.

BID DOCUMENT FOR

Supply and Erection of 33 kV pole mounted Breaker, Isolator with

Structures, 33 kV underground cable & terminal kits, earth

electrodes, earth mat materials, extension of 33 kV bay, shifting of 33

kV PT etc.

And

Erection and commissioning of 2x1000 kVA, 33/0.433 kV Compact

Sub-station

At

DATA CENTRE AT ASEB CAMPUS, DWARANDHA, SIX MILE,

GUWAHATI UNDER

RESTRUCTURED ACCELERATED POWER DEVELOPMENT AND REFORM PROGRAMME (R-APDRP)

ON “TURNKEY” MODE

SCHEME: R-APDRP, Part-A

NIT No: CGM (PP&D)/ APDCL/R-APDRP/….

2

ASSAM POWER DISTRIBUTION CO. LTD R-APDRP Cell, PROJECT PLANNING & DESIGN

NIT No.CGM (PP&D)/ APDCL/R-APDRP/

Sealed Tenders are invited from experienced & financially sound Electrical Contractor(s) (individual or

joint venture)/Firm(s) having valid electrical contractor license up to 33kV issued by the competent authority of

the Govt. of Assam for Supply and Erection of 33 kV pole mounted Breaker, Isolator with Structures, laying &

termination of 33 kV underground cable & terminal kits, earth mat including earth conductor & electrodes, riser

etc, extension of 33 kV bay, shifting & re-installation, commissioning of 33 kV PT etc. and Erection and

commissioning of 2x1000 kVA, 33/0.433 kV Compact Sub-station at R-APDRP Data Centre, ASEB Campus,

Six mile, Dwarandha, Guwahati.

Tender papers can be purchased in all working days up to 4 PM w.e.f. 02.04.2012 to 12.04.2012 from

the office of the Nodal Officer, R-APDRP Cell, Bijulee Bhawan, Paltan bazaar, 6th Floor, Guwahati-1.

Pre bid meeting will be held on 20.04.2012

Last date of submission of bid – 27.04.2012 (1 PM).

Date of opening of technical bid - 27.04.2012 (1-30 PM)

Details may be seen in the website www.apdcl.gov.in

Chief General Manager (PP&D), APDCL, 6

th floor, Bijulee Bhawan.

Guwahati-1 Memo No. CGM(PP&D)/APDCL/R-APDRP/…. Dt.

Copy to: -

1. PS to the Chairman and Managing Director, APDCL, Bijulee Bhawan for kind appraisal of the CMD.

2. The PRO, ASEB, Bijiulee Bhawan, Paltan Bazar, Guwahati for publication of the above tender in one issue of “The Assam Tribune” “The Sentinel” and “Dainik Janambhumi”.

3. The OSD to MD, APDCL, Bijiulee Bhawan, Paltan bazaar, Guwahati for publication in the official website.

Chief General Manager (PP&D), APDCL, 6

th floor, Bijulee Bhawan

3

SECTION -1

NOTICE INVITING TENDER

4

ASSAM POWER DISTRIBUTION CO. LTD

PROJECT PLANNING & DESIGN

NOTICE INVITING TENDER NIT No. CGM (PP&D)/ APDCL/…

Sealed Tenders are invited from experienced & financially sound Electrical Contractor(s) (individual or

joint venture)/Firm(s) having valid electrical contractor license up to 33kV issued by the competent authority of

the Govt. of Assam for Supply, Erection, testing, commissioning of 33 kV pole mounted Breaker, Isolator with

Structures, 33 kV underground cable & terminal kits, earth electrodes, earth mat materials, extension of 33 kV

bay, shifting of 33 kV PT & re-erection etc. and Erection and commissioning of 2x1000 kVA, 33/0.433 kV

Compact Sub-station at R-APDRP Data Centre, ASEB Campus, Six mile, Dwarandha, Guwahati.

Source of Fund: Partly from Govt. of India and partly from APDCL Eligibility Criteria:

1. Average Annual turnover of the bidder for the last three financial years for the work should be as mentioned below and duly certified by registered Chartered Accountant with Registration No.

2. Past and present performance of the bidder in ASEB or in any of its successor companies will be taken into account to decide the eligibility as per clause 4 (a) of Sec-2.

Bid validity: 270 days from the date of submission of Bid.

Cost of Tender Paper: Rs.4000/-(Rupees Four thousand) only in the form of ‘A/C Payee Demand Draft/Banker’s Cheque (non-refundable) duly pledged in favour of “ASSAM POWER DISTRIBUTION COMPANY LIMITED”. Tender papers can be purchased on all working days up to 4 PM w.e.f 02.04.2012 to 12.04.2012 from the office of the Nodal Officer, R-APDRP Cell, APDCL, Bijulee Bhawan, 6

TH Floor, Guwahati-1.

Alternatively, the Bid Document can be downloaded from the website: www.apdcl.gov.in for tender

submission purpose. The Bidders using downloaded document will attach with their Bids(Techno-commercial) an ‘A/C Payee Demand Draft/Banker’s Cheque (non-refundable) of Rs. 4000/-(Rupees Four thousand only) duly pledged in favour of “ Assam Power Distribution Company Limited, Guwahati-1”as a cost of tender paper. Bidders will ensure that the complete document in full is downloaded and used. Any bid without the payment of Rs. 4000.00 as above will be rejected outright ; the date of purchase of said A/C Payee Demand Draft/ Banker’s Cheque should be within the date of issue of Tender paper. Date of submission of Tenders: Up to 13-00 Hrs. of 27.04.2012

Date of opening of Bid: Techno-commercial bids will be opened on 27.04.2012 at 13-30 Hrs. and the price bid on a date to be notified later on.

Details of work

Package no. Work description

Average annual turn

over (Rs in lakh)

EMD amount (Rs.

In lakh)

Period of completion

In days

Data Centre/PS-2

Supply ,Erection, testing & commissioning of 33 kV pole mounted Breaker, Isolator with Structures, 33 kV underground cable & terminal kits, earth electrodes, earth mat materials, extension of 33 kV bay, shifting of 33 kV PT etc. and Erection and commissioning of 2x1000 kVA, 33/0.433 kV Compact Sub-station at R-APDRP Data Centre, ASEB Campus, Six mile, Dwarandha, Guwahati.

240.0 2.00

90 (Ninety) days

from the date of issue of work

order

5

Terms & Conditions:

1. The work should be carried out as per latest APDCL specification and construction standard.

2. In case of a joint venture firm, the relevant deed in support of joint venture, an agreement duly

registered or certified by Notary must be submitted along with the bid. In absence of such documents,

the tender from a joint venture firm shall be rejected.( for joint venture requirement refer clause: 5 of

Sec-2)

3. The Techno-Commercial & Price bids must be submitted in two separate sealed cover superscribing

the following on both the covers

a) Name of bidder with full address

b) “Techno-Commercial bid with earnest money” for envelope containing Techno-commercial Bid and

“Price bid” for envelope containing the price bid.

c) NIT reference number.

4. Rates should be quoted both in figures and words legibly and no overwriting will be accepted.

5. Earnest money as stipulated should be submitted with the Techno-Commercial bid in the form of

Bank Guarantee (BG) of Nationalized Bank with a validity of minimum one year pledged in favour

of “ASSAM POWER DISTRIBUTION COMPANY LIMITED, Guwahati-1”. Any tender without earnest

money will be rejected outright.

6. Quoted rate should be firm and inclusive of all taxes and duties.

7. Quoted rate must be valid for a minimum of 270 days.

8. There will be a pre-bid discussion with the intending tenderer to be held on 20.04.2012 at 15-00 Hrs in

the Ground Floor Conference Hall, Bijulee Bhawan, Paltanbazar, Guwahati-1 regarding terms and

conditions and scope of work.

9. The tender should be submitted in the office of the Nodal Officer, R-APDRP, APDCL, Bijulee Bhawan,

6th

floor, Paltanbazar, Guwahati-1 and will be opened on the scheduled date & time in presence of the

intending tenderers.

10. The Company reserves the right to accept or reject any tender in part or in full or split the work or

cancel/withdraw the Notice inviting tender without assigning any reason thereof whatsoever and in such

case, no tenderer/ intending tenderer shall have any claim arising out of such action.

Chief General Manager (PP&D), APDCL, 6th floor, Bijulee Bhawan. Paltan bazar,Guwahati-1

6

SECTION 2

TENDER INVITING PROPOSAL

7

ASSAM POWER DISTRIBUTION CO. LTD PROJECT, PLANNING & DESIGN

Supply and Erection of 33 kV pole mounted Breaker, Isolator with Structures, 33 kV underground cable

& terminal kits, earth electrodes, earth mat materials, extension of 33 kV bay, shifting of 33 kV PT etc. and

Erection and commissioning of 2x1000 kVA, 33/0.433 kV Compact Sub-station at R-APDRP Data Centre,

ASEB Campus, Six mile, Dwarandha, Guwahati.

1. Intent of the Tender Enquiry

The intent of the Tender Enquiry is to invite proposals from the prospective and relevantly experienced and financially sound contractor(s) (individual or joint venture)/firms to carry out the work of Supply and Erection of 33 kV pole mounted Breaker, Isolator with Structures, 33 kV underground cable & terminal kits, earth electrodes, earth mat materials, extension of 33 kV bay, shifting of 33 kV PT etc. and Erection and commissioning of 2x1000 kVA, 33/0.433 kV Compact Sub-station at R-APDRP Data Centre, ASEB Campus, Six mile, Dwarandha, Guwahati. (The Compact Sub-station shall be provided by APDCL)

2. Basic specification of the various equipment/ works to be supplied /carried out.

i. All equipment supplied shall conform to the requirement of relevant ISS (BIS) as approved by

ASEB/Company. ii. All materials supplied shall be erected, protected as per approved standard practice for proposed

type of electrical work so as to supply electricity to the consumers most effectively and in an intrinsically safe manner.

iii. All equipment supplied and installed shall provide easy and effective:

• Maintainability

• Reliability

• Availability

• Long life All equipment supplied and installed shall be provided stable and adequate weather protection, system

earthing etc. LA should be earthed separately. iv. All items, which may require frequent opening up/ dismantling for maintenance, shall be adequately

sealed against any tampering/ theft etc. v. Generally supply and erection of materials and system shall meet the requirement of construction

standard being followed in the electrification work.

3. Basic specification of the various equipment to be supplied. vi. All equipment supplied shall conform to the requirement of relevant ISS (BIS) as approved by

ASEB/Company and that of REC specification and construction standards. vii. All equipment supplied and installed shall provide easy and effective:

• Maintainability

• Reliability

• Availability

• Long life All equipment supplied and installed shall be provided stable and adequate weather protection, system

earthing etc. viii. All items, which may require frequent opening up/ dismantling for maintenance, shall be adequately

sealed against any tampering/ theft etc. ix. Generally supply and erection of materials and system shall meet the requirement of construction

standard being followed in the electrification work.

4. Basic qualifying requirement:

The prospective bidder must fulfill the following pre-bid qualifying requirement a. The bidder must have successfully supplied and commissioned at least 1 no. of 33/0.433 kV

Compact Substation during last 5 years as on the date of bid opening and which must be in satisfactory operation for at least 1 (one) year as on the date of bid opening.

8

b. Power of attorney should be a registered one. c. Formal authority for signing the tender or other documents on behalf of the firm / individual

must be submitted along with the bid.

5. Submission of bid

a. Techno-commercial bid Techno-commercial bid should be submitted in a sealed envelope, Superscribing “Techno-commercial bid with EMD” with name of bidder, full address and NIT reference and under this will be included and defined vendors scope of work, responsibilities, guarantees, specification of equipment, commercial terms and conditions, vendor’s company credentials, experience of similar assignments, registration details, etc. as per requirement. Tender proforma for techno-commercial Bid is enclosed as Annexure-I. b. Earnest Money Deposit (EMD): The Tender must be accompanied with earnest money as mentioned in the NIT against the work to be deposited in the form of Bank Guarantee (BG) of Nationalized Bank pledged in favour of “ASSAM POWER DISTRIBUTION COMPANY LIMITED. Guwahati-1”. The EMD should be submitted along with Techno- Commercial bid. The earnest money will be released to the unsuccessful bidders on finalization of the tenders. The EMD to the successful bidder will be released on submission of Security Deposit at the time of execution of the agreement as per clause 10.2 c. Submission of documents with technical bids. i) Detail list of makes and materials offered with catalogues, technical specification etc. ii) Certificates and testimonials in support of credentials of the bidder’s organization. iii) Brief write-up on methodology to carry out the assignment, if awarded. iv) Details of manpower to be engaged for the assignments. v) Any other information, the vendor may feel facilitative in evaluating the bid. vi) Certificate from Registered Charted Accountant in support of Annual turn over vii) Solvency certificate from Bank viii) Certificate in support of performance of the bidder, if the bidder is involved in any litigation with

ASEB / or any successor company of ASEB. The bidder should furnish the information to that effect

d. Price Bid Price bid should be submitted in a sealed envelope superscribing “Price Bid” with name of bidder, NIT reference No. Under this will include rates of supply of different items. The tender proforma for price Bid is enclosed here as Annexure. e. Submission of bid Both the envelope should be placed in a bigger envelope duly sealed superscribing name of bidder, NIT reference and addressed to Nodal Officer, R-APDRP, APDCL, Bijulee Bhawan, 6

th Floor,

Paltanbazar, Guwahati. Note:-:

a. If there is discrepancy between the unit price and the total price that is obtained by multiplying the unit price and quantity, the unit price shall prevail and total price should be corrected. If there is a discrepancy between the words and figures, the amount in word should prevail. If the bidder does not accept the correction of the errors as above, his bid will be rejected and the amount of bid guarantee/security will be forfeited.

b. No separate declaration offering discount on price will be allowed. Offered price in the price schedule will be final.

6. Estimation of material requirement: The total quantity of materials required is indicated in the BOQ

7. Award of work:

9

i) The evaluation of bids will be carried out, first of techno-commercial bid and thereafter opening the price bid of only those who qualify and meet the technical requirement.

ii) Company reserves the right not to order/ award the job to the price-wise lowest party if the party during evaluation is found technically non responsive.

iii) The LOA should be accepted within 7 (seven) days from the issue of werk order.

iv) Work should be started within fifteen (15) days from the date of issue of the work order, failing which order may be cancelled without further correspondence.

8. Period of completion: 90 days from the date of LOA

9. Termination of work order:

Company reserves the right to terminate the work order at any stage in accordance with the Company’s General Condition of Supply and Erection in force.

10. Terms of Payment 10.1 (a) Supply: 70% payment for supply of materials would be admissible within 30 (Thirty) days from the date of receipt of materials in full and good conditions and as per terms and conditions stipulated by the supply order. Balance 30% payment would be admissible within 30 (Thirty) days after 100% satisfactory installation of the equipment. 10.1 (b) Erection: 100% payment for erection of materials would be admissible within 30 (Thirty) days from the date of satisfactory commissioning of 100% equipments, duly certified by the field officers and routed through NO, R-APDRP.

(i) Supply should be strictly conforming to relevant technical specification. (ii) Bill in triplicate along with consignee note and other documents such as challan, packing list with revenue stamp where necessary should be sent should be the consignee. (iii) Before dispatch, clearance from the authorized inspector of APDCL should invariably be obtained. Inspection report along with detailed test test reports should be furnished along with each consignment. (iv) The supplies should be intimated to the Nodal Officer, R-APDRP about the dispatch of every consignment along with supporting documents for his record.

All payment shall be made from the office of the CGM(F&A), APDCL duly passed by the Nodal Officer, R-APDRP and countersigned by the CGM, (PP&D) and on submission of work progress report( as per format which will be enclosed at the time of awarding work order ).

10.2 Security deposit and agreement:

The successful bidders shall have to deposit security money in the form of Bank Guarantee issued by any Nationalized Bank/Scheduled Bank in Company’s standard proforma on non-judicial stamp of appropriate value for an amount equal to 2.5% of the contract value at the time of execution of agreement. The security deposit is liable to be forfeited in case of non-execution of contract/ work order. The security deposit will be released on successful commissioning and testing of the materials ordered and after depositing performance B/G as per clause 11(d).

11. Guarantees and Penalties (a) Liquidated Damages (LD)

The proposed work is on top priority of APDCL and therefore has to be completed within stipulated/agreed schedule. Any delay beyond that will attract penalty as per Company’s General condition of supply and erection.

(b) Equipment and system installed shall be guaranteed individually for integrated operations for a period of 60 (Sixty) months from date of commissioning of a system. In case of detection of any

10

defect in individual equipment or system as a whole, the same shall be replaced by the vendor free of cost within 15 days of intimation by the Company’s representative.

(c) Warranty from the manufacturer shall be produced along with manufacturer’s test certificate for all equipment/ materials covered under Manufacturer’s warranty.

(d) A performance Bank Guarantee from a Nationalized Bank/Scheduled Bank in Board’s standard proforma on Non judicial stamp paper of appropriate value with a validity of 66 (Sixty) months from the date of dispatch @ 5% of total value of work executed shall have to be furnished by the Contractor before final payment.

12. Environmental Considerations: While carrying out the assignment, no damage to environment /forests will be caused by the contractor. If so done, the contractor will have to compensate the same to the satisfaction of the concerned Authority.

13. Submission of documents. During project execution

i) All documents for approval shall be submitted in 6 copies. ii) All final documents to be submitted to statutory organizations will be furnished as per requirement of

the authority.

14. Funding of the project. The proposed work is funded partly by the APDCL’s own fund & partly by GOI fund.

15. Disclaimer:

While the Company will make every endeavor to extend necessary facilitation in expediting the work, the contractor shall be responsible to organize and arrange all necessary inputs right from mobilization activities up to completion of the project. Company will not entertain any failure / delay on such accounts. Also, Company will not be responsible for any compensation, replenishment, damage, theft etc. as may be caused due to negligent working, insufficient coordination with Government / non Government / Local Authority by the contractor and/ or his personnel deputed for work. The contractor shall take necessary insurance coverage under LIC/GIC. etc. for his working personnel and the goods in store as well as in transit. The contractor will be deemed to have made him acquainted with the local working conditions at site(s) and fully provide for into the bid submitted.

16. Terms and conditions, which are not specified, herein above will be governed by Company’s General Conditions of supply and erection in force.

11

Annexure - I Tender Proforma part – I (Techno-commercial Bid)

NIT No.CGM (PP&D)/ APDCL/R-APDRP/ … /Data Centre/S-S/11

1. Name and full address of the Bidder. : 2. Particulars of payment made for Purchase of

tender document in the shape of . : 3. Amount of earnest money paid in the shape of : 4. Whether Sales Tax clearance : Yes / No

Certificate submitted 5. VAT Registration. No/ Service Tax Regd No. : 6. Acceptance of guarantee clause of :

Materials /equipment and system Installed individually and for integrated Operation.

7. Acceptance of penalty clause : 8. Acceptance of terms of payment : 9. Certificate/ documents regarding adequate :

Experience of doing similar job 10. Details of work presently in hand with amount : Yes/No

(Awarded by APDCL and other successor Companies of ASEB)- a separate sheet if Required may be enclosed as per Annexure-I(A)

11. Details of manpower and T&Ps including :

Vehicles available with the firm to be Enclosed separately.

12. List of documents to be enclosed : Yes/No

as per Annexure-I(B)

Signature with full name and designation of bidder or

his/her authorised representative with seal

12

Annexure- I(A)

List of ongoing & completed projects of APDCL & Other successor companies of ASEB

Sl.No. Name of the work Order No Contract

value Scheme

Stipulated date of completion

Present Status

1

2

3

13

Annexure- I(B)

Sl No. Qualification Requirement Furnished

at Annexure

Page Remark

A LEGAL

1 Document in support of legal status of firm

2 Memorandum of Association &Registered/Notorised Joint venture Agreement if JV

3 Registered/Notorised power of attorney of the signatory of the Bidder to participate in the Bid.

4 Board resolution of the company to authorizing the signatory

5 Information regarding any litigation, current or during the last five years, in which the Bidder is involved, the parties concerned, and disputed amount

6 Valid Electrical Contractor's License

7 Valid Electrical & Supervisory License

8 VAT/CST/WCT/Service Tax registration certificate

9 Provident Fund Registration Certificate

B Financial

1 Audited Balance sheet, Profit & Loss account, Auditor’s report for last three year

2 CA Certified Turnover of bidder during the last 3(three) years.

3 Evidence of adequacy of working capital for this contract (access to line (s) of credit and availability of other financial resources)

4 Authority to seek references from the Bidder's Bankers

5 Income Tax return for last 3(three) years

6 Value of similar work performed by the bidder in each of the last five years - Statement

7 Proposals for subcontracting components of the Works amounting to more than 10 percent of the Contract Price

8 Details of the Bank Guarantee as EMD (BG/KVP/TD/Bank Call Deposit)

C Technical ability and experience

1

Experience in works of a similar nature and volume for each of the last 5(five) years and details of works under way or contractually committed including full address of client for communication- Statement

2 Certificates issued by an Engineer not below the Cadre of Deputy General Manager/SE along with supporting photo-copies of agreements for the works executed in any one year (12 months)

3 Detailed activity plan and methodology supported with layout and necessary drawings and calculations (detailed) to allow the employer to review their proposals.

4 Quality Assurance plan with Bar Chart

5 List of technical personnel and their qualification and experience with organisation chart

6 Proof of availability of the tools, tackles, spare parts, etc. for carrying out the works.

D Technical particulars of equipments and Materials offered in the Bill of Material and their GTPs

14

SECTION 3

BILL OF QUANTITIES

& PRICE BIDDING SCHEDULE

15

SCHEDULE OF QUANTITY (SUPPLY)

(Note: Items and Sub items shown in this Annexure shall only be used in preparing Price Bidding

Schedules. Any other items not specifically mentioned here under are Deemed to be included in

other Items)

Sl No Item Description Unit of measurement

Qty

33kV Sending Side

(i) 33kV Auto-Reclosure with built in numeric relay, small RTU and communication modem (as per specification), connecting cables with connectors, mounting structure.

No 1

(ii) Station type 33kV LA with structure No 3 (iii) 630A, Disconnector with Earth switch &

Structure. No 1

(iv) 630A, Disconnector with Structure No 1 (v) Single core 120 sq mm Aluminium armoured

XLPE Cable

Mtr 400

(vi) Cable end termination kit for Sl. No 1.0 (v) above with necessary lugs, bi-metallic nuts & bolts and washer.

Set 8 set

(vii) ACSR Wolf conductor Mtr 50

(viii) PG clamp for ACSR Wolf conductor No 6

(ix) 4 nos. 1core 120 mm2 XLPE cable support structure with non-magnetic clamps

Set 1

1.0

(x) 33kV CT & PT combined metering set (three CT) of Accuracy class 0.5, 15VA CT burden & 100 VA PT burden with mounting structure, 10 meter 12 core 2.5 mm2 copper armoured control cable & meter cabinet at sending end.

Set 1

(xi) Static type tri-vector Energy meter as per APDCL approved specification with DLMS Protocol

No 1

2 (i) Supply of furniture for remote control center. Set 1

(ii) 3.5 core 300 sqmm Al armoured LT XLPE cable. 2 ckt for each transformer including termination accessories to Data Centre Control Room (50x3x2) Mtr.

Mtr 300

SCHEDULE OF QUANTITY (ERECTION)

(Note: Items and Sub items shown in this Annexure shall only be used in preparing Price Bidding

Schedules. Any other items not specifically mentioned here under are

Deemed to be included in other Items)

Sl No Item Description Unit of

measurement

Qty

1.0 33kV Sending Side

16

Sl No Item Description Unit of

measurement

Qty

(i) Erection, testing, commissioning and remote communication of 33kV ACB with built in numeric relay, small RTU and communication modem (as per specification), connecting cables with connectors, mounting structure.

No 1

(ii) Erection including foundation, testing & commissioning of Station type 33kV LA with structure

No 3

(iii) Foundation, Erection, testing & commissioning of 630A, isolator with Earth switch & Structure.

No 1

(iv) Foundation, Erection, testing & commissioning of 630A, isolator with Structure

No 1

(v) Laying of cable including sand, bricks, marker, digging,back filling and testing for 4 nos. Single core 120 sqmm Aluminium armoured XLPE cable in single trench as per specification.

Mtr 400

(vi) Erection of Cable end termination kit for Sl. No 1.0 (v) above with necessary lugs, bi-metallic nuts & bolts and washer.

Set 8 set

(vii) Shifting of existing 33kV PTs with structure, new foundation, testing & commissioning of PT

No 3

(viii) PG clamp for ACSR Wolf conductor

No 6

(ix) Foundation & erection of 4 nos. 1x 120 mm2 XLPE cable support structure with non-magnetic clamps.

Set 1

(x) Foundation, erection, testing & commissioning 33kV CT & PT combined metering set.

Set 1

33kV Receiving end 2.0

(i) Erection, testing & commissioning of 33kV, 20KA for 1 Sec, SF6 insulated Non-Extinsible Compact switchgear consisting of 2 Nos fixed Manual Vacuum Circuit Breaker with breaking capacity of 20kA for 3 Sec in SF6 insulated stainless steel enclosure, one no 33kV, 20kA for 1 sec, SF6 insulated

No 2

17

Sl No Item Description Unit of

measurement

Qty

disconnector, Microprocessor based self-Powered Relay with series trip, self-powered microprocessor based numerical over current relay (IDMTL + Inst.) protection. (see annexed SLD)

(ii) Erection testing & commissioning of Inter connection cable between 33kV Switchgear and transformer with 1x 120 mm2, XLPE cable, unarmoured.

Mtr 60

(iii) Cable termination kit foe 1x120 mm2 XLPE cable

Nos 14

(iv) Construction of foundation including materials for compact outdoor enclosure

Nos 2

(v) Laying of cable including sand, bricks, marker, digging,back filling and testing for 3.5 core 300 sqmm Al armoured LT XLPE cable (2 ckt for each transformer to Data Centre Control Room) in single trench as per specification.

Mtr 600

3.0 (i) Erection of Outdoor type enclosure for compact substation.

Set 2

4.0 Design, resistivity testing and Erection of Earthmat including materials, earthing of enclosure, transformer, HT & LT switchgear as per specification.

Set 1

5.0 Commissioning remote HMI for control and data acquisition of compact substation, control of auto-reclosure including supply of necessary communication cables.

Set 1

6.0 Erection and commissioning of 2x1000 kVA, 33/0.433 kV Compact Sub-station

No. 2

18

PRICE BIDDING SCHEDULE (SUPPLY)

Supply of materials

S.No. Brief Item Description Unit Qty

Unit price of item,

inclusive of E.D.,

F&I up to work site

(Rs)

Total amount

(Rs)

Total Sales Tax (Rs)

Other levies eg.

Octroi/Entry Tax (Rs)

Total cost of the Item

(Rs)

1 2 3 4 5 6=(4x5) 7= (6 X Rate)

8 = (6 X Rate)

9=(6+7+8)

1 33kV Sending Side

2

(i) 33kV Auto-Reclosure with built in numeric relay, small RTU and communication modem (as per specification), connecting cables with connectors, mounting structure.

No 1

3 (ii) Station type 33kV LA with structure

No 3

4

(iii) 630A, Disconnector with Earth switch & Structure.

No 1

5 (iv) 630A, Disconnector with

Structure No 1

6

(v) 3.5 core 300 sqmm Al armoured XLPE cable. 2 ckt for each transformer to Data Centre Control Room

Mtr 600

7

(vi) Cable end termination kit for Sl. No 1.0 (v) above with necessary lugs, bi-metallic nuts & bolts and washer.

Set 8 set

8 (vii) ACSR Wolf conductor Mtr 50 nil nil

9 (viii) PG clamp for ACSR Wolf

conductor No 6

10

(ix) 4 nos. 1core 120 mm2 XLPE cable support structure with non-magnetic clamps

Set 1

11

(x) 33kV CT & PT combined metering set (3 CT) of Accuracy class 0.5, 15VA CT burden & 100 VA PT burden with mounting structure, 10 meter 12 core 2.5 mm2 copper armoured control cable & meter cabinet at sending end.

Set 1

12 (xi) Static type tri-vector Energy

meter as per APDCL approved specification (DLMS Protocol)

No 1

13. (ii) Supply of furniture for remote

control center. Set 1

19

PRICE BIDDING SCHEDULE (ERECTION)

Erection of materials

S.No. Brief Item Description Unit Qty Unit

erection/ installation

charges (Rs)

Total Erection cost (Rs)

Work contract

Tax (Rs)

Service Tax (Rs)

Total cost of

erection (Rs)

Grand Total

(Supply &

Erection (Rs)

1 2 3 4 5 6=

(4X5) 7= (6 X Rate)

8= (6 X Rate)

9 = 6+7+8

10 = 9 + supply portion

7.0 33kV Sending Side

(i) Erection, testing, commissioning and remote communication of 33kV ACB with built in numeric relay, small RTU and communication modem (as per specification), connecting cables with connectors, mounting structure.

No 1

(ii) Erection including foundation, testing & commissioning of Station type 33kV LA with structure

No 3

(iii) Foundation, Erection, testing & commissioning of 630A, isolator with Earth switch & Structure.

No 1

(iv) Foundation, Erection, testing & commissioning of 630A, isolator with Structure

No 1

(v) Laying of cable including sand, bricks, marker, digging,back filling and testing for 4 nos. Single core 120 sqmm Aluminium armoured XLPE cable in single trench as per specification.

Mtr 40

0

(vi) Erection of Cable end termination kit for Sl. No 1.0 (v) above with necessary lugs, bi-metallic nuts & bolts and washer.

Set 8

set

(vii) Shifting of existing 33kV PTs with structure, new foundation, testing & commissioning of PT

No 3

(viii) PG clamp for ACSR Wolf conductor No 6

(ix) Foundation & erection of 4 nos. 1x 120 mm

2 XLPE cable support structure

with non-magnetic clamps.

Set 1

(x) Foundation, erection, testing & commissioning 33kV CT & PT combined metering set.

Set 1

8.0 33kV Receiving end

9.0 (i) Erection, testing & commissioning of 33kV, 20KA for 1 Sec, SF6 insulated Non-Extinsible Compact switchgear consisting of 2 Nos fixed Manual Vacuum Circuit Breaker with breaking capacity of 20kA for 3 Sec in SF6 insulated stainless steel enclosure, one no 33kV, 20kA for 1 sec, SF6 insulated disconnector, Microprocessor based self-Powered Relay with series trip, self-powered microprocessor based numerical over current relay (IDMTL +

No 2

20

Inst.) protection. (see annexed SLD)

(ii) Laying of cable including sand, bricks, marker, digging,back filling and testing for 3.5 core 300 sqmm Al armoured XLPE cable (2 ckt for each transformer to Data Centre Control Room) in single trench as per specification.

Mtr 600

(iii) Cable termination kit foe 1x95 mm2

XLPE cable Nos 14

(iv) Erection testing & commissioning of Inter connection cable between transformer and Data Centre Electrical Control Panel with armoured XLPE cable.

Mtr 50

10.0 (i) Erection of Outdoor type enclosure for compact substation.

Set 2

11.0 Erection of Earthmat including materials, earthing of enclosure, transformer, HT & LT switchgear as per specification.

Set 1

12.0 Commissioning remote HMI for control and data acquisition of compact substation, control of auto-reclosure including supply of necessary communication cables.

Set 1

Preferred manufacturers of the equipments

Sl No. Item Description Preferred manufacturers

1. 33kV Auto-Reclosure with built in

numeric relay, small RTU and communication modem

M/s Scheneider Electric Co, M/S. Tavrida …or equivalent

2. Station type 33kV LA with structure Lamco/Rechem/Oblum or

equivalent

3. 630A, Disconnector with Earth switch &

Structure. Siemens/Crompton or equivalent

4. 630A, Disconnector with Structure Siemens/Crompton or equivalent

5. Single core 120 sq mm Aluminium

armoured XLPE Cable Universal/Rechem or equivalent

6. Cable end termination kit. Universal/Rechem or equivalent

7. ACSR Wolf conductor

8. PG clamp for ACSR Wolf conductor

9. 33kV CT & PT combined metering set

(three CT) of Accuracy class 0.5, 15VA CT burden & 100 VA PT

Laxmi Electrical/ Technoval / ASEB approved

10. Static type tri-vector Energy meter as

per APDCL approved specification with DLMS Protocol

Secure Meters Ltd. //L&T / Genus or equivalent

11.

Furniture for remote control center. Godrej or equivalent

12. 3.5 core 300 sqmm Al armoured XLPE

cable. Universal/Polycab/KEI

21

SECTION -4

GENERAL REQUIREMENTS

22

GENERAL REQUIREMENTS

The bidder shall comply with the following general requirements along with other specifications.

1.0 QUALITY ASSURANCE PLAN

1.1 The bidder shall invariably furnish the following information along with his offer failing which the offer

shall be liable for rejection. Information shall be separately given for individual type of equipment

offered.

i) The structure of organization

ii) The duties and responsibilities assigned to staff ensuring quality of work

iii) The system of purchasing, taking delivery and verification of materials

iv) The system for ensuring quality of workmanship

v) The quality assurance arrangements shall confirm to the relevant requirement of ISO 9001 on ISO

9002 as applicable.

vi) Statement giving list of important raw materials, names of sub-supplies for the raw materials, list of

standards according to which the raw material are tested, list of tests normally carried out on raw

material in the presence of suppliers representative, copies of test certificates.

vii) Information and copies of test certificates as on (i) above in respect of bought out items

viii) List of manufacturing facilities available

ix) Level of automation achieved and list of areas where manual processing exists.

x) List of areas in manufacturing process, where stage inspections are normally carried out for

quality control and details of such test and inspection.

xi) List of testing equipment available with the bidder for final testing of equipment specified and

test plant limitation, if any vis-à-vis the type. Special acceptance and routine tests specified in the

relevant standards. These limitations shall be very clearly brought out in "Schedule of Deviations"

from the specified test requirement.

1.2 The contractor shall within 30 days of placement of order, submit the following information to the

purchaser.

i) List of the raw material as well as bought out accessories and the names of sub-suppliers selected

from those furnished along with the offer.

ii) Type test certificated of the raw material and bought out accessories if required by the purchaser.

iii) Quality Assurance Plant (QAP) with hold points for purchasers inspection. QAP and purchasers

hold points shall be discussed between the purchaser and contractor before the QAP is finalized.

The contractor shall submit the routine test certificates of bought out accessories and central excise

asses for raw material at the time of routine testing if required by the purchaser and ensure that the

quality assurance requirements of specification are followed by the sub-contractor.

1.3 The Quality Assurance Programme shall give a description of the Quality System and Quality Plans

with the following details.

i) Quality System

• The structure of the organization.

• The duties and responsibilities assigned to staff ensuring quality of work.

• The system of purchasing, taking delivery of verification of materials

• The system of ensuring of quality workmanship.

• The system of control of documentation.

• The system of retention of records.

• The arrangement of contractor internal auditing.

• A list of administrator and work procedures required to achieve contractor’s quality

requirements. These procedures shall be made readily available to the purchaser for inspection on

request.

ii) Quality Plans

• An outline of the proposed work and program sequence.

• The structure of contractor’s organizations for the contract.

• The duties and responsibilities ensuring quality of work.

• Hold and notification points.

• Submission of engineering documents required by this specification.

• The inspection of the materials and components on request.

23

• Reference to contractor’s work procedures appropriate to each activity.

• Inspection during fabrication /construction.

• Final inspection and test.

2.0 Inspection

2.1 The Owner's representative or third party nominee shall be entitled to have access to the works and all

places of manufacture, where insulator, and its component parts shall be manufactured and the

representatives shall have full facilities for unrestricted inspection of the Contractor's and sub-

Contractor's works, raw materials, manufacture of the material and for conducting necessary test as

detailed herein.

2.2 The material for final inspection shall be offered by the Contractor only under packed condition as

detailed in the specification.

2.3 The Contractor shall keep the Owner informed in advance of the time of starting and the progress of

manufacture of material in their various stages so that arrangements could be made for inspection.

2.4 No material shall be dispatched from its point of manufacture before it has been satisfactorily

inspected and tested unless the inspection is waived off by the Owner in writing. In the latter case also

the material shall be dispatched only after satisfactory testing for all tests specified herein have been

completed.

2.5 The acceptance of any quantity of material shall be no way relieve the Contractor of his responsibility

for meeting all the requirements of the specification and shall not prevent subsequent rejection, if such

material are later found to be defective.

3.0 Additional Tests

3.1 The Owner reserves the right of having at his own expense any other test(s) of reasonable nature

carried out at Contractor's premises, at site, or in any other place in addition to the type, acceptance

and routine tests specified in these bidding documents against any equipments to satisfy himself that

the material comply with the Specifications.

3.2 The Owner also reserves the right to conduct all the tests mentioned in this specification at his own

expense on the samples drawn from the site at Contractor's premises or at any other test center. In

case of evidence of noncompliance, it shall be binding on the part of the Contractor to prove the

compliance of the items to the technical specifications by repeat tests or correction of deficiencies, or

replacement of defective items, all without any extra cost to the Owner.

4.0 Test Reports

4.1 Copies of type test reports shall be furnished in at least six (6) copies along with one original. One copy

shall be returned duly certified by the Owner only after which the commercial production of the

concerned materials shall start.

4.2 Copies of acceptance test reports shall be furnished in at least six (6) copies. One copy shall be

returned duly certified by the Owner, only after which the material shall be despatched.

4.3 Record of routine test reports shall be maintained by the Contractor at his works for periodic inspection

by the Owner's representative.

4.4 Test certificates of test during manufacture shall be maintained by the Contractor. These shall be

produced for verification as and when desired by the Owner.

5.0 List of Drawings and Documents:

5.1 The bidder shall furnish the following along with bid.

i) Two sets of drawings showing clearly the general arrangements, fitting details, electrical connections etc.

ii) Technical leaflets (users manual) giving operating instructions. iii) Three copies of dimensional drawings of the box for each quoted item. The manufacturing of the equipment shall be strictly in accordance with the approved drawings and no

deviation shall be permitted without the written approval of the purchaser. All manufacturing and fabrication work in connection with the equipment prior to the approval of the drawing shall be at the

24

supplier's risk. Approval of drawings/work by purchaser shall not relieve the supplier of his responsibility and liability for

ensuring correctness and correct interpretation of the drawings for meeting the specification.

5.2 The requirements of the latest revision of application standards, rules and codes of practices. The

equipment shall conform in all respects to high standards of engineering, design, workmanship and

latest revisions of relevant standards at the time of ordering and purchaser shall have the power to

reject any work or materials which, in his judgment is not in full accordance therewith.

5.3 The successful Bidder shall within 2 weeks of notification of award of contract submit three sets of final

versions of all the drawings as stipulated in the purchase order for purchaser's approval. The purchaser

shall communicate his comments/approval on the drawings to the supplier within two weeks. The

supplier shall, if necessary, modify the drawings and resubmit three copies of the modified drawings for

their approval. The supplier shall within two weeks. Submit 30 prints and two good quality report copies

of the approved drawings for purchaser's use.

5.4 Eight sets of operating manuals/technical leaflets shall be supplied to each consignee for the first

instance of supply.

5.4.1 One set of routine test certificates shall accompany each dispatch consignment.

5.4.2 The acceptance test certificates in case pre-dispatch inspection or routine test certificates in cases

where inspection is' waived shall be got approved by the purchasers.

6.0 Any Item specification if not available in this document Contractor shall supply and execute the items

meeting the relevant IS specification with the approval of the purchaser.

25

SECTION – 5

FORMS OF BID

26

PROFORMA OF BANK GUARANTEE FOR BID GUARANTEE/SECURITY (To be stamped in accordance with Stamp Act)

The non-Judicial stamp paper should be in the name of issuing bank Ref………………………….. Bank Guarantee No…………..

Date……………………. To

The Chief General Manager (PP&D) Assam Power Distribution Company Ltd. Bijulee Bhawan, Paltanbazar Guwahati-1

Dear Sirs/ Madam,

In accordance with invitation to bid under your Bid No………………. M/s………………. having its Registered/

Head Office at ……………..( hereinafter called the ‘Bidder’) wish to participate in the said Bid or …………………

and you, as a special favour have agreed to accept an irrevocable and unconditional Bank Guarantee for an

amount of ……………….. valid upto……………………. On behalf of Bidder in lieu of the Bid deposit required to

be made by the bidder, as a condition precedent for participation in the Said Bid.

We, the …………………. Bank at …………………… have our Head Office at…………..( local address)

guarantee and undertake to pay immediately on demand by Assam Power Distribution Company Limited, the

Amount of ……………………………………………

…………………………………………………..( in words & figures) without any reservation, protest, demur and

recourse. Any such demand made by said ‘Owner’ shall be conclusive and

binding on us irrespective of any dispute or difference raised by the Bidder.

The Guarantee shall be irrevocable and shall remain valid up to and including …………. @....................... if

any further extension of this guarantee is required, the same shall be extended to such required period ( not

exceeding one year) on receiving instruction from M/s ………… … ………. on whose behalf this guarantee is

issued.

In witness whereof the Bank, through its authorized office, has set its hand and stamp on this

…………… day of ………………….. 20………… at …………………………

WITNESS ……………………… ……………………. (Signature) ( Signature) …………………….. …………………… (Name) (Name) ……………………. …………………… ( Official Address) (Official Address)

@ This date shall be thirty (30) days after the last date for which the bid is valid.

27

PROFORMA OF BANK GUARANTEE FOR CONTRACT PERFORMANCE (To be stamped in accordance with Stamp Act)

Ref………………………….. Bank Guarantee No…………..

Date……………………. To

The Chief General Manager (PP&D) Assam Power Distribution Company Ltd. Bijulee Bhawan, Paltanbazar Guwahati-1

Dear Sirs/ Madam, In consideration of Assam Power Distribution Company Ltd., (herein after referred to as the ‘Owner’ which expression shall unless repugnant to the context or meaning thereof include its successors, administrators and assigns) having awarded to M/s…………… ….……………………….with registered/ Head office at ……………….( hereinafter referred to as “ Contractor” which expression shall unless repugnant to the context or meaning thereof include its successors, administrators, executors and assigns), a Contract by issued of Owner’s Letter of Award No…………… dated……………….. and the same having been acknowledged by the contractor, resulting in a contract bearing No…………….. dated contractor having agreed to provide a Contract Performance Guarantee for the faithful performance of the entire Contract equivalent to……………… being(%) (Percent *) of the said value Contract to the Owner. We………………………………………………………………………………………….. (Name & Address) having its Head Office at …………………( hereinafter referred to as the “ Bank” , which expression shall, unless repugnant to the context or meaning thereof, include its successors, administrators, executors and assigns) do hereby guarantee and undertake to pay the owner, on demand any all monies payable by the contractor to be extent of …………………. As aforesaid at any time up to ………………………..**( day/month/year) without any demur, reservation , contest , recourse or protest and / or without any reference to this contractor. Any such demand made by the owner on the bank shall be conclusive and binding notwithstanding any difference between the Owner the Contractor or any dispute pending before any Court, Tribunal, Arbitrator or any other authority . The bank undertakes not to revoke this guarantee during its currency without previous consent of the owner and further agrees that the guarantee herein contained shall continue to be enforceable till the owner discharges this guarantee. The Owner shall have the fullest liberty without affecting in any way the liability of the Bank under the guarantee, from time to time to extend the time for performance or the contract by the contractor. The owner shall have the fullest liberty, without affecting this guarantee, to postpone from time to time the exercise of any power vested in them or of any right which they might have against the contractor, and to exercise the same at any time in any matter, and either to enforce or to for bear to enforce any covenants, contained or implied, in the contract between the owner and the contractor or any other course or remedy or security available to the owner. The Bank shall not be released to its obligations under these presents by any exercise by the owner of its liberty with reference to the matters aforesaid or any of them or by reason of any other act of omission or commission on the part of the owner or any other indulgences shown by the owner or by any other matter or thing whatsoever which under law would , but for this provision have the effect of relieving the Bank. The bank also agrees that the owner at its option shall be entitled to enforce this guarantee against the Bank as a principal debtor, in the first instance without proceeding against the contractor and not withstanding any security or other guarantee the owner may have in relation to the Contractor’s liabilities. Notwithstanding anything contained herein above our liability under this guarantee is restricted to ……………………. And it shall remain in force up to an including …………………….. and shall be extended from time to time for such period( not exceeding 1 year) as may be desired M/s………………………………………………………….on whose behalf this guarantee has been given. Dated this……………………. Day of ……………………….. 20……………… at………… WITNESS ……………………………. ……………………… (Signature) (Signature) …………………………… ……………………..

28

(Name) (Name) ………………………….. …………………….. (Official address) (Official address) Attorney as per power Of Attorney No………….. Date…………………….. Notes * This sum shall be 10%(Ten) of the Contract price. ** The date will be 90(Ninety) days after the end of the Warranty Period as specified in the contract. 1. The stamp paper of appropriate value shall be purchased in the name of issuing bank.

29

PROFORMA OF EXTENSION OF BANK GUARANTEE Ref………………………….. Date……………………. To

The Chief General Manager (PP&D) Assam Power Distribution Company Ltd. Bijulee Bhawan, Paltanbazar Guwahati-1

Dear Sirs/ Madam, Sub: Extension of Bank Guarantee No……………….. for Rs…………………. Favouring yourselves , expiring

on …………………. On account of M/S………………………….. in respect of contract no……………………. dated …………….. ( hereinafter called original Bank Guarantee).

At the request of M/s ……………………… we …………………… bank, branch office at ………………….. and having its Head Office at ………………………. Do hereby extend our liability under the above mentioned Bank Guarantee No………………… dated………………………for a further period of ……………………… ( Years/ Months) from………………….. to expire on………………….. expect as provided above, all other terms and conditions of the original Bank Guarantee No………………………. dated ………………. Shall remain unaltered and binding. Please treat this as an integral part of the original Bank Guarantee to which it would be attached.

Yours faithfully For……………………………… Manager/ Agent/Accountant ………………….. Power of attorney No…………………… Dated…………………………………… SEAL OF BANK

Note: The non-judicial stamp paper of appropriate value shall be purchased in the name of the Bank who has issued the Bank Guarantee.

30

PROFORMA OF BANK GUARANTEE FOR ADVANCEPAYMENT ( To be stamped in accordance with Stamp Act )

Ref………………………….. Bank guarantee No…………………… Date……………………. To

The Chief General Manager (PP&D) Assam Power Distribution Company Ltd. Bijulee Bhawan, Paltanbazar Guwahati-1

Dear Sirs/ Madam, In consideration of Assam Power Distribution Company Ltd.(hereinafter referred to as the ‘Owner’, which

expressions shall unless repugnant to the context or meaning thereof include its successors, administrators and

assigns) having awarded to M/s…………………………… hereinafter referred to as the ‘Contractor’ which

expression shall unless repugnant to the context or meaning thereof , include its successors, administrators,

executors and assigns), a Contract by issue of Owner’s letter of Award No……………………

Dated……………………and the same having been acknowledged by the contractors, resulting in a Contract

bearing no…………………. Dated…………………. Valued (at………………………………( in words and figures).

For ………………………….Contract (space of work)………………………………….. (hereinafter called the

‘Contract’) and the Owner having agreed to make an advance payment to the Contractor for performance of the

above contract amounting ……………………………… (in words and figures) as an advance against Bank

Guarantee to be furnished by the Contractor.

We…………………………..( Name of the Bank) having its Head Office at……………………………… (

hereinafter referred to as the ‘Bank’, which expression shall, unless repugnant to the context or meaning thereof

, include its successors, administrators, executors and assigns) do hereby guarantee and undertake to pay the

owner , immediately on demand any or, all monies payable by the contractor to the extent of ………………..as

aforesaid at any time upto…………………….. (a….) without any demur, reservation, contest, recourse or

protest and/or without any reference to the contractor. Any such demand made by the Owner on the Bank shall

be conclusive and binding notwithstanding any difference between the Owner and the Contractor or any dispute

pending before any Court, Tribunal, Arbitrator or any other authority. We agree that the guarantee herein

contained shall be irrevocable and shall continue to be enforceable till the owner discharge this guarantee.

The Owner shall have the fullest liberty without affecting in any way the liability of the Bank under this

guarantee, from time to time to vary the advance or to extent the time for performance of the contract by the

Contractor. The Owners shall have the fullest liberty without affecting this guarantee, to postpone from time to

time the exercise of any power vested in them or of any right which they might have against the Contractor and

to exercise the same at any time in any manner, and either to enforce any covenants, contained or implied, in

the contact between the Owner and the Contractor or any other course or remedy or security available to the

Owner. The Bank shall not be released of its obligations under this presents by any exercise by the owner of its

liberty with reference to the matter aforesaid of any of them or by reason of any other act or forbearance or

other acts of omission or commission on the part of the owner or any other indulgence shown by the owner or

by any other matter or thing whatsoever which under law would be for this provision have the effect of relieving

the Bank.

The Bank also agrees that the Owner at its option shall be entitled to enforce this guarantee against the Bank

as a principal debtor, in the first instance without proceeding against the contractor and not withstanding any

security or other guarantee that the owner may have in relation to the contractors liabilities.

Notwithstanding anything hereinabove our liability under this guarantee is limited to………… and it shall remain

in force upto an including ……………………….( @ and shall be extended from time to time for such period ( not

exceeding 1 year as may be desired by M/s…………………………………………………………………...dated this

………. Day of ……………….. 20……. At……………………………..

31

WITNESS…………………………………….. ……………………………… …….……………………….. (Signature) (Signature) ……………………………. ……………………………… (Name) (Name) …………………………..…. (Designation) (Official Address) (With Bank Stamp) Attorney as per Power of attorney No……………………… …. Dated…………………. Strike whichever is not applicable @ The date will be 90(ninety) days after the date of completion of the Contract.

32

PROFORMA OF “AGREEMENT” (To be executed on non-Judicial stamp paper)

This Agreement made this …………….. day of ………… two thousand……………. Between Assam Power

Distribution Company Ltd. having its head office at Bijulee Bhawan, Paltanbazar, Guwahati-1 ( hereinafter

referred to as ‘Owner’ or ‘APDCL’, which expression shall include its administrators, successors and assign on

one part and (hereinafter referred to as the ‘Contractors ‘X’ ( Name of the contracting Co.) which expression

shall include its administrators, successors, executors and permitted assigns) on the other part.

WHEREAS APDCL desirous of …………………….. in ……………. Circle associated with APDCL at ……………….(District) invited Bids for…………………………………………….. ………………………………. (Briefly describe scope of works) for the first state of the project as per its Bid Specification No……………………………… AND WHEREAS……………………….”X” ………………………. Had participated in the above referred Bidding vide their proposal No……………………. dated………………. And awarded the Contract to……………..” X”…………….. on terms and conditions documents referred to therein which have been acknowledged by……………….”X”…………………..resulting into a “Contract”

NOW THEREFORE THIS DEED WITNESS AS UNDER:-

1.0 Article

1.1 Award of Contract

APDCL awarded the contract to……………..”X”……………… for the work of …………… on the terms and

conditions contained in its letter of Award No…….. ………. Dated…………… and the documents referred to

therein. The award has taken effect from aforesaid letter of award. The terms and expression used in this

agreement shall have the same meaning as are assigned to them in the ‘Contract Documents’ referred to in this

succeeding Article.

2.0 Documentation

2.1 The contract shall be performed strictly as per the terms and condition stipulated herein and in the following

documents attached herewith( hereinafter referred to as “Contract Documents”.)

i) Section 1-11 of the Bidding Document.

ii) Proposal Sheets, Data Sheets, Drawing work schedule submitted by “X”.

APDCL’s Letter of Award No………….. dated……………….duly acknowledged by “X”.

Quality Plans for manufacturing and field activities entitled as Quality Plan.

All the aforesaid Contract Documents shall form an integral part of this agreement , in so far as the same or any

part conform to the bidding documents and what has been specifically agreed to by the Owner in its letter of

Award. Any matter inconsistent therewith, contrary or repugnant thereto or any deviations taken by the

Contractor in its ‘Proposal’ but not agreed to specially by the Owner in its Letter of Award shall be deemed to

have been withdrawn b y the Contractor. For the sake of brevity, this agreement along with its aforesaid

Contract Documents shall be referred to as the ‘Agreement’.

3.0 Conditions & Covenants

3.1 The scope of Contract, Consideration, Terms of Payment, Price Adjustments, Taxes wherever applicable,

Insurance, Liquidated Damage, Performance Guarantees and all other terms and conditions are contained in

APDCL’s Letter of Award No………........... dated……………… read in conjunction with other aforesaid contract

documents. The contract shall be duly performed by the Contract Documents, but which are needed for

successful, efficient, safe and reliable operation of the equipment unless otherwise specifically excluded in the

specification under ‘exclusion’ or Letter of Award.

3.2 The scope of work shall also include supply and installation of all such items which are not specifically

mentioned in the contract Documents, but which are needed for successful, efficient, safe and reliable operation

of the equipment unless otherwise specifically excluded in the specifications under ‘exclusions’ or ‘Letter of

Award’.

3.3 Time Schedule

33

3.3.1 Time is the essence of the Contract and schedules shall be strictly adhered to “X” shall perform the work

in accordance with the agreed schedules.

3.4 Quality Plans

3.4.1 The Contractor is responsible for the proper execution of the Quality Plans mentioned in Section 4.8 of

GTC. The work beyond the customer’s hold points will progress only with the owners consent. The Owner will

also undertake quality surveillance and quality audit of the Contractor’s /Sub-contractor’s works, systems and

procedures and quality control activities. The Contractor further agrees that any change in the Quality Plan will

be made only with the Owner’s approval. The contractor shall also perform all quality control activities,

inspection and tests agreed with the Owner to demonstrate full compliance with the contract requirements.

3.4.2 The contractor also agrees to provide the Owner with the necessary facilities for carrying out inspection,

quality audit and quality surveillance of contractors and its Subcontractor’s Quality Assurance Systems and

Manufacturing Activities.

These shall include but not limited to the following:

• Relevant plant standards, drawing and procedures;

• Detailed Quality Assurance System manuals for manufacturing activities.

• Storage procedures and instructions weld, NDT, heat treatment prior to commencement of

manufacture;

• Complete set of log sheets (blank) mentioned in the Quality Plans.

It is expressly agreed to by the contractor that the quality test and inspection by the owner shall not in any

way relief the contractor of its responsibilities for quality standards and performance guarantee and their other

obligations under the Agreement. 3.4.4 “X’ agrees to submit quality Assurance Documents to APDCL for review

and record after completion and within 3 weeks of dispatch of material.

The package will include the following :

• Factory test result, inspection report for testing required by this contract or applicable codes and

standards.

• Two copies of inspection reports duly signed by Quality Assurance personnel of both APDCL and

“X” for the agreed customer hold points.

• Report of the rectification works where and if applicable.

3.5 It is expressly agreed to by the Contractor that notwithstanding the fact that the Contract is termed as

Supply-cum-Erection Contract or indicates the break-up of the Contract consideration, for convenience of

operation and for payment of sale tax on supply portion, it is in fact one composite Contract on single source

responsibility basis and the Contractor is bound to perform the total Contract in its entirely and non-performance

of any part or portion of the Contract shall be deemed to be breach of the entire Contract.

3.6 The Contractor guarantees that the equipment package under the Contract shall meet the ratings and

performance parameters as stipulated in the technical specifications (Section

10) and in the event of any deficiencies found in the requisite performance figures, the Owner may at its option

reject the equipment package or alternatively accept it on the terms and conditions and subject to levy of the

liquidated damages in terms of Contract documents. The amount of liquidated damages so leviable shall be in

accordance with the contract document and without any limitation.

3.7 It is further agreed by the contractor that the contract performance guarantee shall in no way be constructed

to limit or restrict the owner’s equipment right to recover the damages/compensation due to shortfall in the

equipment performance figures as stated in Para 3.6 above or under any other clause of the agreement. The

amount of damages/compensation shall be recoverable either by way of deduction from the contract price,

contract performance guarantee and or otherwise. The contract performance guarantee furnished by the

contractor is irrevocable and unconditional and the owner shall have the power to invoke it notwithstanding any

dispute or difference between the owner and the contractor pending before any court tribunal, arbitrator or any

other authority.

3.8 This Agreement constitutes full and complete understanding between the parties and terms of the payment.

It shall supersede all prior correspondence terms and conditions contained in the Agreement. Any modification

of the agreement shall be effected only by a written instrument signed by the authorized representative of both

the parties.

4.0 SETTLEMENT OF DISPUTES

34

4.1 It is specifically agreed between parties that all the differences or disputes arising out of the agreement or

touching the subject matter of the agreement shall be decided by process of settlement and Arbitration as

specified in clause 41 of the General Condition of the Contract and provision of the Indian Arbitration Act, 1996

shall apply. Guwahati Courts alone shall have exclusive jurisdiction over the same.

4.2 NOTICE OF DEFAULT

Notice of default given by either party to the other under agreement shall be in writing and shall be deemed to

have been duly and properly served upon the parties hereto if delivered against acknowledgement or by telex

or by registered mail with acknowledgements due addressed to the signatories at the addresses mentioned at

Guwahati.

IN WITNESS WHEROF, the parties through their duly authorized representatives have executed these

presents (execution where of has been approved by the competent authorities of both the parties) on the day,

month and year first above mentioned at Guwahati .

WITNESS:

1. ……………………….. (Owner’s signature) ( Printed Name)

2. ……………………… (Designation)( Company’s Stamp)

3. …………………….. (Contractor’s Signature)(Company’s Name)

4. …………………….. (Designation)(Company’s Stamp)

• Applicable in case of single award is placed on one party on Supply-cum- Erection basis. In two

separate awards are placed on single party/two different parties this clause is to be modified suitably

while signing the contract agreement to be signed separately for two awards to incorporate cross fall

breach clause.

35

FORM OF POWER OF ATTORNEY FOR JOINT VENTURE

(On Non-judicial Stamp Paper of Appropriate value to be Purchased in the

Name of Joint Venture)

KNOW ALL MEN BY THESE PRESENTS THAT WE, the Partners whose details are given

hereunder……................................................................. have formed a Joint Venture under the laws

of……………………..and having our Registered Office(s)/Head Office(s) at

………………………………………………………………………………………………………….....(herein after

called the 'Joint Venture' which expression shall unless repugnant to the context or meaning thereof, include

its successors, administrators and assigns) acting thorough M/S………………

………………………………………………………………………….. being the Partner in-charge do hereby'

constitute, nominate and appoint M/S…………………………………… ………………………………..a Company

incorporated under the laws of arid having its Registered/Head Office at..as our duly 'constituted lawful

Attorney (hereinafter called "Attorney" or" Authorized Representative" or "Partner In-charge") to exercise all or

any of the powers for and on be.ha1f of, the Joint Venture in regard* to ---------------------(Name of the Package)

(Specification No.-------------------------) of Assam Power Distribution Company Ltd. Bijulee Bhawan, Paltan

Bazar, GUWAHATI (hereinafter called the "Owner"). and the bids for which' have been invited by the Owner,

to undertake the following acts:

i) To submit proposal and participate in the aforesaid Bid Specification of the Owner on behalf of the

“Joint Venture”.

ii) To negotiate with the Owner 'the terms and' conditions for award of the Contract pursuant to the

aforesaid Bid and to sign the Contract with the Owner for and on behalf of the "Joint Venture'.

iii) To do any other act or submit any document rated to the above.

iv) To receive, accept and execute .the Contract for and on behalf of the "Joint Venture".

It is clearly understood that the Partner In-charge (Lead Partner) shall ensure performance of the Contract(s)

and if one or more Partner fail to perform their respective portion of the Contract(s), the same shall be deemed

to be a default by all the Partners.

It is expressly understood that this Power of Attorney shall remain valid binding and irrevocable till completion of

the Defect Liability Period in terms of the Contract.

The Joint Venture hereby agrees and undertakes to ratify and confirm all the above whatsoever the said

Attorney/ Authorized Representative/Partner In-charge quotes in the bid, negotiates and signs the Contract with

the Owner and/or proposes to act on behalf of the joint Venture by virtue of this Power of Attorney and the same

shall bind the Joint Venture as if done by itself.

* Strike which is not applicable.

IN WITNESS THEREOF the Partners Constituting the Joint Venture as aforesaid have executed

these presents on this …………….. day of ……………....... under the Common Seal(s) of their

Companies.

36

for and on behalf of

the Partners of Joint

Ventures

The Common Seal of the above Partners of the Joint Venture:

The Common Seal has been affixed there unto in the presence of :

WITNESS

1. Signature _________________________

Name___________________________

Designation_______________________

Occupation ________________________

2. Signature _________________________

Name___________________________

Designation_______________________

Occupation ________________________

37

FORM OF JOINT VENTURE AGREEMENT

(ON NON-JUDICIAL STAMP PAPER OF APPROPRIATE VALUE TO BE PURCHASED IN THE NAME

OF JOINT VENTURE)

PROFORMA OF JOINT VENTURE AGREEMENT BETWEEN ______________________

______________________________ AND ____________________________________________

FOR BID SPECIFICATION No_______________________________OF ASSAM POWER DISTRIBUTION

COMPANY LTD.

THIS Joint Venture agreement executed on this _____day of ______________Two thousand eight and

between M/S _________________________________________________ a Company incorporated under the

laws of _______________________________ and having its registered office at

__________________________________ _____________________________ (herein after called the “Lead

Partner” which expression shall include its successors, executors and permitted assigns) and M/S

_______________________________________________ a Company incorporated under the laws of

_______________________________ and having its registered office at

________________________________________________________________ (herein after called the

“Partner” which expression shall include its successors, executors and permitted assigns) for purpose of

making a bid and entering into a contract* (in case of award) for Construction of

_______________________________(name of the package) against the specifications

No._____________________ of APDCL BIJULEE BHAWAN, PALTAN BAZAR, GUWAHATI – 781001, an

Electricity Distribution Company registered under Indian Electricity Act, 2003 having its registered office at

Bijulee Bhawan, Paltan Bazar, Guwahati – 781001 (herein after called the “Owner”)

WHEREAS the Owner invited bids as per the above mentioned Specification for the design manufacture,

supply and erection, testing and commissioning of Equipment/Materials stipulated in the bidding documents

under subject Package*

For_________________ (Package Name) (Specification No.:_____________________)

AND WHEREAS Annexure – A (Qualification Requirement of the Bidder). Section-4, forming part of the bidding

documents, stipulates that a Joint Venture of two or more qualified firms as partners, meeting the requirement

of Annexure-A, Section 4 as applicable may bid, provided the .Joint Venture fulfills all other requirements of

Annexure-A, Section 4 and in such a case, the BID shall be signed by all the partners so as to legally bind all

the Partners of the .Joint Venture, who will be jointly and severally liable to perform the Contract and all

obligations hereunder .

* Strike which is not applicable.

The above clause further states that the Joint Venture agreement shall be attached to the bid and the contract

performance guarantee will be as per the format enclosed with the bidding document without any restriction or

liability for either party.

AND 'WHEREAS the bid has been submitted to the Owner vide proposal

No .............................dated .....................................................by Lead Partner based on the Joint Venture

agreement between all the Partners under these presents and the bid in accordance with the requirements of

Annexure-A (Qualification Requirements of the Bidders), Section -4 has been signed by all the partners.

NOW THIS INDENTURE WITNESSETH AS UNDER:

In consideration of the above premises and agreements all the Partners to this ,Joint Venture do hereby now

agree as follows:

1. In consideration of the award of the Contract by the Owner to the Joint Venture

38

partners, we, the Partners to the Joint Venture agreement do hereby agree that M/S__________________

shall act as Lead Partner and further declare and confirm that we shall jointly and severally be bound unto

the Owner for the successful performance of the Contract and shall be fully responsible for the design,

manufacture, supply, and successful performance of the equipment in accordance with the Contract.

2. In case of any breach of the said Contract by the Lead Partner or other

Partner(s) of the Joint Venture agreement, the Partner(s) do hereby agree to be fully responsible for the

successful performance of the Contract and to carry out all the obligations and responsibilities under the

Contract in accordance with the requirements of the Contract.

3. Further, if the Owner suffers any loss or damage on account of any breach in

the Contract or any shortfall in the performance of the equipment in meeting the performance guaranteed

as per the specification in terms of the Contract, tile Partner(s) of these presents undertake to promptly

make good such loss or damages caused to the Owner, on its demand without any demur. It shall not be

necessary or obligatory for the Owner to proceed against Lead Partner to these presents before

proceeding against or dealing with the other Partner(s)

4. The financial liability of the Partners of this Joint Venture agreement to the

Owner, with respect to any of the claims arising out of the performance of non-performance of the

obligations set forth in the said Joint Venture agreement, read in conjunction with the relevant conditions

of the Contract shall, however, not be limited in any way so as to restrict or limit the liabilities of any of the

Partners of the Joint Venture agreement.

5. It is expressly understood and agreed between the Partners to this Joint

Venture agreement that the responsibilities and obligations of each of the Partners shall be as delineated

in Appendix-I (*To be incorporated suitably by the Partners) to this agreement. It is further agreed by the

Partners that the above sharing of responsibilities and obligations shall not in any way be a limitation of

joint and several responsibilities of the Partners under this Contract.

6. This Joint Venture agreement shall be construed and interpreted in

accordance with the laws of India and the courts of Delhi shall have the exclusive jurisdiction in all

matters arising there under.

7. In case of an award of a Contract, We the Partners to the Joint Venture

agreement do hereby agree that we shall be jointly and severally responsible for furnishing a contract

performance security from a bank in favour of the Owner in the forms acceptable to purchaser for value

of 10% of the Contract Price in the currency/currencies of the Contract.

8. It is further agreed that the Joint Venture agreement shall be irrevocable and

shall form an integral part of the Contract, and shall continue to be enforceable till the Owner discharges

the same. It shall be effective from the date first mentioned above for all purposes and intents.

IN WITNESS WHEREOF, the Partners to the Joint Venture agreement have through their authorised

representatives executed these presents and affixed Common Seals of their companies, on the day, month

and year first mentioned above.

IN WITNESS WHEREOF, the Partners to the Joint Venture agreement have through their authorized

representatives executed these presents and affixed Common Seals of their companies, on the day, month

and year first mentioned above.

1. Common Seal of_________________ For Lead

Partner

has been affixed in my/our presence

39

pursuant to the Board of Director's (Signature of authorized

resolution dated________________ representative)

Name

Signature

Designation

Name Common Seal of the Company

Designation

2. Common Seal of_________________ For Other

Partner

has been affixed in my/our presence

pursuant to the Board of Director's (Signature of authorized

resolution dated_______________ representative)

Name

Signature

Designation

Name Common Seal of the Company

Designation

WITNESSES

1. Name . (Signature)

(Official address)

2. Name . (Signature)

(Official address)

40

SECTION 6

TECHNICAL SPECIFICATION

1. TECHNICAL SPECIFICATION FOR 33 kV OUTDOOR POLE-MOUNTED AUTO-

RECLOSER WITH INTEGRATED REMOTE COMMUNICATION CAPABILITIES

41

6.0 Scope : The specification covers the design, manufacturing, testing, supply, installation, testing and commissioning of 33kV outdoor pole mounted autorecloser that have programmable protection features and integrated remote operation capability at nominal A.C. voltages of 36 kV.

A primary objective of this specification is to foster modularity and a maximum level of interchangeability and integration to a central SCADA system by supporting IEC60870-5-101 or DNP3 communications protocols.

6.1 APPLICABLE STANDARDS

IEC 607221

IEEE C37.60

IEC 60255

IEC 60529

All applicable standards shall be of recent revision one.

6.2 RATINGS:

The Autorecloser shall be suitable for use on non-effectively earthed and effectively

earthed networks and under the system conditions and service conditions as follows:

a). Nominal system voltage (U,) (r.m.s.) - 33 kV;

b). Maximum system voltage (Um) (r.m.s.) - 36 kV;

c). Load current - 630 A;

d). short circuit-breaking capacity -16 kA; for 1 sec

e). Lightning Impulse Withstand Voltage - 170 kV

f). System frequency -5OHz;± 5%

g). Number of phases - 3;

h). Interrupting medium- Vacuum.

i). Insulation medium - SF6

j). Closing Mechanism - LV Solenoid

k). Opening Mechanism - Springs

6.3 MOUNTING:

6.3.1 The Auto-recloser shall be of single pole mounted type.

6.3.2 Adequately rated lifting eyes shall be provided and they shall be designed to allow the

completely assembled AR (surge arresters fitted) to be lifted without recourse to a sling

spreader. The diameter of the eyes shall not be less than 30mm.

6.3.3 Suitable mounting brackets for surge arresters shall be provided on the line side and on the

load side of the ar, adjacent to the bushings.

6.3.4 The AR shall be fitted with an external M12 earthing stud, complete with a nut, lock nut and

spring washer.

42

6.3.5 The ar shall have laser cut markings on each bushings marked U1 V1 W1 for the normal line

side and U2 V2 W2 for normal load side.

6.3.6 A detailed drawing of the single pole ar mounting arrangement with surge arresters fitted shall

be provided. The minimum phase-to-earth clearances shall be indicated on the drawing.

6.3.7 The mass of the mounting hardware, the AR and the control cabinet and cable shall be stated

in the tender documentation.

6.4 BUSHINGS:

6.4.1 Terminals

The arrangement for bushing shall be fully insulated eved by using cyclo aliphatic epoxy

resign bushings and silicone rubber bushing boots together with 3 meters 185 mm2 XLPE

insulated aluminum water blocked cable tails to provide a fully insulated bushing

arrangement.

6.4.2 Material

The following bushing materials are acceptable:

a) Outdoor Cyclo aliphatic epoxy resin and/or Silicone rubber

b) Porcelain bushings and EPDM rubber are not acceptable.

c) Minimum acceptable creepage is 1100 mm.

6.5 FINISH:

6.5.1 All interior and exterior ferrous surfaces of auto-reclosers and control cabinets shall be

manufactured from 316 marine grade stainless steel. All support structures and

associated bolts and nuts with these parts, shall be hot-dip galvanized.

6.5.2 Suitable precautions shall be implemented to prevent corrosion due to the use of dissimilar

materials.

6.6 CONTROL EQUIPMENT:

6.6.1 CONTROL CABINET

6.6.2 Cabinets that house equipment for protection and control shall be mounted independently of

the AR.

6.6.3 Suitable ultraviolet-resistant cable, shall be provided to connect the AR to the control cabinet.

6.6.4 It shall be possible to disconnect the cable at the AR while the AR is connected to the power

system, without causing damage or mal-operation: care shall be taken that CTs are not

open circuited. A robust, multi-pin weatherproof connector shall be provided. The female

part of the connector shall be mounted on the ar and the male part shall be mounted on

the cable.

6.6.5 Cabinets shall be adequately sealed and dust protected and shall be internally treated to

prevent moisture condensation. The degree of protection shall be suitable for purpose.

6.6.6 The cabinet shall make provision for bottom entry of three cables. This shall be done with a

pre-punched suitable sized diameter holes. The holes shall be suitably blanked off.

43

6.6.7 The cabinet shall be fitted with an external M12 earthing stud with a nut, lock nut and a

serrated washer.

6.6.8 The door of the cabinet shall be fitted with a robust fastening arrangement that is capable

of being secured by a padlock that has a shackle of 8 mm diameter.

6.6.9 ELECTRONIC CONTROL EQUIPMENT

6.6.10 The controls shall not suffer any damage if one or more poles of the circuit breaker fail to

respond to either a trip or a close command.

6.6.11 Electronic modules shall perform continuous diagnostic monitoring and shall contain

hardware and software watchdog checking.

6.7 PROTECTION CHARACTERISTICS:

General

6.7.1 The ratio of drop-off current to pick-up current shall be at least 95 % for all protection

functions.

6.7.2 The E/F and SEF functions shall be equipped with harmonic filtering (low pass) to prevent

operation when harmonics are present in the primary residual earth currents.

6.7.3 All protection functions, i.e. over-current (O/C), earth fault (E/F) and sensitive earth fault

(SEF) shall have elements with characteristics that comply with IEC 60255.

6.7.4 The sequence of trip and auto-reclose characteristics for O/C, E/F and SEF shall be

programmable to enable:

a). the selection of any combination of the available elements for each trip in the trip-and-

reclose sequence; and

b). separate trip-and-reclose sequences for O/C, E/F and SEF.

6.7.5 A zone sequence co-ordination (ZSC) feature shall be provided to ensure trip-close

sequence co-ordination for combinations of rapid and delayed protection operations

applied to series ars. ZSC functionality shall be such that:

a). an AR senses the presence of an over-current or earth fault, as well as the clearance

of that fault by another device and proceeds to the next protection operation in its

own sequence; and

b). it shall be proceed in its sequence of rapid protection operations only, allowing the full

number of delayed operations to be executed for in-zone conditions.

6.7.6 Loss of Phase (LOP) protection shall be provided to ensure the protection functionality of

ar as below:

a). AR should trip with no auto-reclose in case if there is a loss of voltage on one or two

phases on the upstream part of the line. Loss of supply on all three phases shall

not generate the protection trip.

b). Facility to turn LOP ON or OFF without affecting other protection functions of the

device. Pass-word or other form of access control shall be provided

c). The parameters of configuration of LOP shall include the voltage level (phase to

ground) and time of loss of supply on one or two phases. The voltage level shall

be configurable from 5000 to 10000 Volts with steps not greater then 250 V. Time

range shall be configurable from 1 to 60 sec with steps not greater then 1 sec.

44

d). The information about LOP operation in case of the protection trip shall be recorded

accordingly with indication of the phase(s) causing the trip of ar. The information

about LOP operation shall be easily assessable.

6.7.7 Rapid protection operation shall be possible by selecting a fast curve or instantaneous

protection element.

Co-ordination of the fast curves or instantaneous protection elements between two

devices in series shall be possible either by selecting suitable curves from a family or by

addition of a selectable time increment, typically 0,05s to 3s, in 0,05s steps, or any other

acceptable solution.

6.7.8 Long protection operating times associated with fault levels marginally above the pick-up

setting of the IDMTL protection element shall be avoided by the provision of a Low Set

Definite Time element with the following features:

a). it shall be possible to enable or disable the element. When enabled it shall be active simultaneously as an overlay with all selected elements;

b). the element shall have the same pick-up current setting as the IDMTL element; and

c). the time delay shall be selectable from 2s to 10s, in 1s steps. The time delay shall be independent of any curve manipulation.

6.7.9 A High Set Instantaneous element with a selectable time delay shall be provided, with the

following features:

a). it shall be possible to enable or disable the element. When enabled it shall be active simultaneously as an overlay with all selected elements;

b). circuit-breaker lock-out as a result of an operation due to the High Set Instantaneous element shall be selectable;

c). the pick-up setting range of this element shall be at least 100 % to 1500 % of the over-current setting and shall be independent of any curve manipulation; and

d). the time delay shall be selectable from instantaneous to 1s, in 0,05 s steps. The time delay shall be independent of any curve manipulation.

6.7.10 A cold load pick-up (CLP) feature shall be provided that allows user selectable modification of

protection element characteristics under conditions of system energization. The CLP

function may be provided in one of the following two ways:

a). The instantaneous O/C element and the Low Set Definite Time O/C element could be blocked for the CLP time duration; and

b). The pick-up current setting of the IDMTL O/C element and the Low Set Definite Time O/C element may be modified with a settable factor to increase the pick-up current of these elements for the CLP duration. The instantaneous O/C element should be blocked for this time. This is the preferred method.

The CLP function shall have the following characteristics:

a). the CLP function shall not in any way interfere with any of the other functions'/elements' pick-up current settings except as mentioned above;

b). the CLP functionality shall be such that the active duration of the CLP is selectable from 0 min to 20 min in 1 min steps; and

c). the modification factor should be settable from 1 to 2 in steps of 0,1

6.7.11 Earth Fault Function

6.7.12 The earth fault setting range shall detect primary earth fault currents down to 5 A.

45

6.7.13 Delayed protection operation shall be possible by selecting an IDMTL element with NI, VI or El

curve, or a definite time protection element with time delay from 0.05s to 10s, in 0,05s

steps.

6.7.14 Rapid protection operation shall be possible by selecting a fast curve or instantaneous

protection element.

Co-ordination of the fast curves or instantaneous protection elements between two

devices in series shall be possible either by selecting suitable curves from a family or by

addition of a selectable time increment, typically 0.05s to 3s, in 0.05s steps, or any other

acceptable solution.

6.7.15 A High Set Instantaneous element with a selectable time delay shall be provided with the

following features:

a). it shall be possible to enable or disable the element. When enabled it shall be active simultaneously as an overlay with all selected elements;

b). circuit-breaker lockout as a result of an operation due to the High Set Instantaneous element shall be selectable;

c). the pick-up setting range of this element shall be at least 100 % to 1500 % of the earth fault setting and shall be independent of any curve manipulation; and

d). the time delay shall be selectable from 0,05s to 1s, in 05s steps. The time delay shall be independent of any curve manipulation.

6.7.16 Sensitive Earth Fault (SEF) Function

6.7.17 A primary earth fault current of 4A to 20A in steps not exceeding 1A shall be detectable.

6.7.18 Delayed protection operation shall be possible by selecting a definite time protection element

with time delay from 3s to 25s, in 1s steps.

6.8 Auto-reclose Operation Parameters

6.8.1 The number of sequential trips to reach lockout shall be selectable to be either 1,2,3 or 4.

6.8.2 Reset times shall ideally be separately selectable for SEF and the combination of over-current

and earth fault functions. The reset time shall be selectable from 5s to 120s in 1s steps.

6.8.3 Dead times shall ideally be separately selectable for SEF and the combination of over-current

and earth fault functions. The dead time between each -successive reclosure shall be

independently selectable from instantaneous to 5s for the first reclosure and from a

minimum of 2s up to a maximum of 120s for subsequent reclosures.

6.8.4 A close instruction initiated locally or remotely during a dead time shall result in lockout if the

fault is still present upon closure.

6.9 Statistical Measurement Functions:

The characteristics of the statistical measurement functions shall be as follows

6.9.1 Measurement shall be done with one of the following methods:

a). three-phase-3-wire method; and

b). or the three-phase-4-wire method

6.9.2 Quantities to be measured / calculated with specified accuracy are:

a). r.m.s. phase-to-phase and phase-to-neutral voltage of all three phases: ±2.5% of auto-recloser rated voltage;

b). r.m.s current per phase ± 2.5 % within rated current range

46

c). 3-Ph active & reactive power, active energy , maximum demand and P.F under Class-1 metering principle.

6.9.3 The real power energy and maximum demand measurement shall be integrated with respect to

time. Energy values shall be calculated with selectable time integration periods of 5 min,

15 min, 30 min or 60 min. The data buffer shall work on the FIFO principle and a

minimum size for the data buffer shall store values for 4 months on the 30 minutes

integration period.

6.9.4 The voltage factor of the voltage transformers shall be a minimum of 1.9.

6.9.5 CB and Control element shall have the facilities to record the number and duration of outages. The information shall be assessable locally as well as remotely using SCADA system. The following parameters shall be recorded:

a). Cumulative total number of outages

b). Cumulative total outage duration

c). Time and duration of each outage

6.10 Local Control and Indication

The local control and indication shall be as given in Table-1:

Table-1: Minimum specification of local controls ad indications:

1 Item

2 Features

3 Remarks

Local control Local/Remote 2 position key switchable (See note 1) Circuit-breaker open

Circuit-breaker close ARC ON/OFF SEF ON/OFF

(see note 3) Secure control Secure control Secure or toggled control Secure or toggled control

Local indication Local/Remote (see note 3)

(See note 1) Circuit-breaker open Circuit-breaker close Circuit-breaker lock-out ARC ON/OFF SEF ON/OFF

Protection operation Controller not healthy (see note 2) SF , Alarm See 4.8.9

AC fail DC abnormal

DC fail Charger fail

Local Analog indication (See note 1)

• r.m.s phase-to-phase to neutral voltage of all three phases

• r.m.s current per phase

• three phase active power in KW three phase reactive power in kvars

• total three-phase active energy in kWh

• Power factor

47

NOTES:

1. The local control and the local indication features on the control panel shall be labeled as

presented in column 2, where applicable. The type of switch used for local control shall

not allow for a conflict to exist between the switch position and the function status.

2. The Controller not healthy indication shall indicate the control equipment not healthy

(watchdog) function operated. It shall not operate during the normal pole mounted switch

operating cycle. This indication should remain active until the unhealthy state that initiated

it returns to normal.

3. The three-position switch (labeled as below) shall allow the AR controller to be set in the

following modes:

Remote: In this mode a local operator can trip the AR and change the mode. A remote

operator can trip or close the AR and change configuration parameters. All reporting

functions are active.

Local: In this mode a local operator can trip and close the AR and change configuration

parameters. All reporting functions are active.

6.10.2 The AR shall be provided with external levers to permit manual operation, using an insulated

operating stick, to open, close, lock-out and reset the AR from ground level . Where these

operations can be performed at the control cabinet, it shall only be necessary to provide a

mechanical means to open and lockout the circuit breaker using an insulated operating

stick.

6.10.3 The AR status shall be clearly visible from ground level. “Opened” shall be indicated with a

green “O”. “Closed” shall be indicated by a red “I”. Alternative indications shall be subject

to approval by the purchaser.

6.10.4 Pressure relief facilities shall be provided to enable the AR to withstand safely the effects of

excessive pressure rise due to an internal fault.

6.10.5 Malfunction of the AR shall not pose a safety hazard to the operator due to the recoil or

backlash of items such as external operating rods, ranks and levers.

6.10.6 Easily available (i.e maximum of one keystroke ) local indication of protection operation shall be

provided for at least the last operation of the AR. The function , phase involved and the

current magnitude shall be indicated.

6.10.7 Switches used for local control shall offer the type of control described in table 1 i.e. secure or

toggled control. Electronic keypad controls shall offer ‘quick key’ (maximum of one

keystroke) access to the controls in table1 if not implemented with switches.

6.10.8 ARs using SF, as an arc extinguishing medium shall:

6.10.9 Provide a low gas pressure indication at a gas pressure that enables safe operation of the AR.

6.10.10 Prevent closing of the AR after it has opened under the above-described condition.

6.10.11 Be provided with a method of inhibiting any operation of the AR in the event of the gas pressure

dropping below a safe pressure.

6.11 Remote Control & Indication

6.11.1 The remote controls and indication shall be as given in table 2.

• Maximum demand

48

Table-2: Minimum specification of remote controls and indications

1 Item

2 Features

3 Remarks

Remote control Circuit-breaker open Circuit-breaker close ARC On ARC OFF SEF ON SEF OFF

Secure control Secure control Secure control Secure control Secure control Secure control

Remote indication (See note 3)

Local/Remote Circuit-breaker open Circuit-breaker close ARC On ARC OFF SEF ON SEF OFF IDMTL O/C Trip Low Set DTL O/C Trip Rapid E/F Trip High Set E/F Trip SEF Trip ARC Controller not healthy SF, Alarm AC fail DC abnormal DC fail Charger fail

(See note 2) (see note 4) (see note 1) See 4.8.9 See 4.13.5.3

Analog indication (See note 3)

• r.m.s phase-to-phase and phase to neutral voltage of all three phases

• r.m.s current per phase

• three phase active power in KW

• three phase reactive power in kvars total three-phase active energy in kWh

• Power factor

• Maximum demand

Note 1: The Controller not healthy indication shall indicate the control equipment not healthy (watchdog) function operated. It shall not operate during the normal pole mounted switch operating cycle. This indication should remain active until the unhealthy state that initiated it returns to normal. Note 2: The two-position switch (labeled as below) shall allow the AR controller to be set in the following modes: Remote: In this mode a local operator can trip the AR and change the mode. A remote operator can trip or close the AR and change configuration parameters. All reporting functions are active. Local: In this mode a local operator can trip and close the AR and change configuration parameters. Only monitoring functions are available to remote operators. The local and remote positions shall be indicated separately. Note 3: The ARC indication shall give alarm with any ARC attempt.

6.12 Local Engineering

49

6.12.1 The AR controller shall contain a real time clock (with leap year support) that can be set both

locally and remotely. The requirements of Annex B shall be compiled with. The accuracy

of the clock shall be stated in the tender documentation.

6.12.2 A facility for selecting all the protection, operating and communications characteristics shall be

locally available in the control cabinet. Optional password protection against unauthorized

changes shall be available..

6.12.3 Non-Volatile memory storage shall be sized to store the following minimum data:

6.12.4 All operating , protection and communications parameters.

6.12.5 An event record containing at least 3000 events (a protection event is defined as all operations

in a sequence until successful sequence reset or lockout). The actual number available shall

be stated in the tender documentation.

6.12.6 Refer to Cl. 4.7.1.3

6.12.7 Maximum demand information Maximum demand shall have the facilities to be configured for

weekly or monthly demand.

6.12.8 A pointer shall be provided to indicate up to where the data was last read. This will enable

regular uploading of the data without re-loading of previously read data.

6.12.9 All events shall be time and date stamped with a resolution of at least loms relative to the

onboard real time clock.

6.13 Tele-Control Requirements

6.13.1 The ar controller shall detect and report disconnection of the control cable between the

controller and AR.

6.13.2 It shall be possible to operate ar, change the active protection group, turn Auto-Recloser

capabilities ON/OFF and turn E/F and SEF ON/OFF remotely using the protocol specified in

4.12.7b). This functionality shall be subject to the limitations of the selected protocol. Details

shall be provided in the tender documentation.

6.14 COMMUNICATIONS

6.14.1 As a minimum, two independent RS-232 communication ports that allow for simultaneous

operation shall be provided, to be used as follows-.

6.14.2 To upload the non-volatile data to and from a personal computer. The requirements of the

personal computer shall be stated in the tender documentation.

6.14.3 To interface to remote communications equipment (e.g. GSM / PSTN modems, radio-modems

and Fiber Optic Modems).

6.14.4 As a minimum, it shall be possible for these ports to operate at the following speeds:

a). 1200 bps

b). 2400 bps and

c). 9600 bps

6.14.5 One of the RS-232 port shall support full asynchronous V.24 functionality.

6.14.6 The ar controller shall offer a GSM modem option with the following minimum characteristics:

6.14.7 Operation at 1200 - 11200 Baud using Dual Band GSM Modem with an option for GPRS

communications.

50

6.14.8 It shall be possible to disconnect the RS-232-to-modem interface to facilitate local protocol and

communications troubleshooting.

6.14.9 The protocol to be supported by the ar controller for remote communications shall be one of the

following:

a). IEC 60870-5-101

b). DNP 3.0 and

c). IEC 61850

6.15 Power supplies

6.15.1 The AR system shall provide power for the electronics, operation of the ar and operation of the

communications equipment (e.g. radio or GSM-modem).

6.15.2 Primary supply: Preference will be given to the ability to obtain primary power directly from the

HV power system requiring no additional primary supply connection.

6.15.3 Test supply: The AR shall accept an external AC 230 V 50 Hz supply.

6.15.4 Optional supply: The ar shall accept an external DC 110 V supply.

6.15.5 Auxiliary supply: An auxiliary supply with the following minimum characteristics shall be

provided.

6.15.6 One battery and constant voltage charger with current limiting shall be part of the ar. Battery

standby time shall not be less than 24 h, allowing for ten ar operations and a Transmit:

Receive: Standby duty cycle of 5:5:90 from a 5 W output radio. The battery shall

recharge to 80 % of its capacity in a maximum of 15 h. The total number of circuit-breaker

operations under the above communications scenario shall be at least 10 ar operations

preventing closing if the battery will not have enough stored energy to open the circuit-

breaker for a protection trip condition. Details will be stated in the tender documentation.

6.15.7 Batteries shall be disconnected at the manufacturer's specified minimum voltage.

6.15.8 'Battery Low' indication shall be available locally and remotely and shall include a battery test.

The indication of "Battery Low" status shall allow for a further ten ar operations.

6.15.9 The minimum battery life expectancy shall be 5 years. Details of the guaranteed life

expectancy of the battery shall be stated in the tender documentation.

6.16 Maintenance and commissioning

All the communications equipment shall be easily accessible in the control cabinet. Wiring of "communications links in the control cabinet shall permit the connection of a temporary protocol-Monitor. It shall be possible to perform secondary injection testing while the AR is communicating with the center.

6.16.1 It shall be Possible to disconnect the AR circuit breaker and connect a simulated breaker to

the control cabinet for testing purposes.

6.16.2 The ar shall not malfunction while the radio is transmitting via an antenna in close proximity

and the control cabinet door is open.

6.16.3 Provision shall be made in the control cabinet for individually isolating the power supply

to/from the following:

a) battery; b) battery charger;

51

c) radio; and d) primary supply to the control cabinet electronics.

6.17 Rating Plate

Each AR shall bear a rating plate of an intrinsically corrosion-resistant material, indelibly marked with the sea-level rating for which the equipment has been type tested. The rating plate shall be indelibly marked with: a). Manufacturer name

b). Type and serial no.

c). Mass in kg

d). Voltage transformer ratio, class and burden

e). Auxiliary supply voltage (if applicable).

f). SC breaking capacity.

g). Asymmetrical breaking current.

h). Peak making current.

6.18 Additional Information.

6.18.1 Schematic and GA diagram of AR.

6.18.2 Details of the maintenance and operating equipment and procedures needed and a detailed

parts list of the various components.

6.18.3 A description of the AR operation, with instruction and maintenance manuals, including

maintenance schedules, protection characteristics, communications facilities, the method

of applying settings to relays and controls, together with any software required and the

cost thereof. The software requirements shall be stated in the tender documentation.

6.18.4 A list of recommended spares and tools, quoting the prices of each item and its availability.

6.18.5 Full details of the protocol implementation and the complete point database.

6.19 TESTS

6.19.1 Type Tests

The AR shall have been type tested in accordance with, and found to comply with, the

requirements of either IEC 62271 or ANSI/IEEE C37.60-1981 in recognized laboratory for

the following, and the copy of tests certificate shall be enclosed. The type tests shall not

be older than three years.

a). Interrupting performance (automatic operation).

b). Interrupting performance (manual operation).

c). Operating duty.

d). Making current

e). Minimum tripping current.

f). Dielectric tests

g). Temperature rise

h). Radio interference voltage.

i). Mechanical operations

52

j). Control equipment surge withstand capability.

The control cabinet and associated electronics shall have been type tested in accordance

with IEC/IEEE. Copy of type tests certificates shall be enclosed. The type test shall not be

older than three years.

6.19.2 Routine Tests

Routine tests, as required in the relevant standards, shall be carried out as a normal requirement of the contract and, unless otherwise agreed upon, shall be witnessed by the purchaser or by his appointed representative. No additional charge shall be levied for such tests or for the production or presentation of documentation related to routine tests. Duplicate copies of routine test certificates shall be supplied together with the equipment when the latter is delivered to the final destination stated in the order.

2. TECHNICAL SPECIFICATION FOR SURGE ARRESTORS

7.0 SCOPE

53

7.1.1 This Section covers the specifications for design, manufacture, shop & laboratory testing before

despatch of 33 kV 10 kA, Station class heavy duty, gapless metal (zinc) oxide Surge Arrestors

complete with fittings & accessories.

7.2 STANDARDS

7.2.1 The design, manufacture and performance of Surge Arrestors shall comply with IS: 3070 Part-3 unless

otherwise specifically specified in this Specification 7.3 GENERAL REQUIREMENT

7.3.1 The surge arrestor shall draw negligible current at operating voltage and at the same time offer least

resistance during the flow of surge current. 7.3.2 The surge arrestor shall consist of non-linear resistor elements placed in series and housed in electrical

grade porcelain housing/silicon polymeric of specified creepage distance. 7.3.3 The assembly shall be hermetically sealed with suitable rubber gaskets with effective sealing system

arrangement to prevent ingress of moisture. 7.3.4 The surge arrestor shall be provided with line and earth terminals of suitable size. The ground side

terminal of surge arrestor shall be connected with 25x6 mm galvanized strip, one end connected to the surge arrestor and second end to a separate ground electrode. The bidder shall also recommend the procedure which shall be followed in providing the earthing/system to the Surge Arrestor.

7.3.5 The surge arrestor shall not operate under power frequency and temporary over voltage conditions but under surge conditions, the surge arrestor shall change over to the conducting mode.

7.3.6 The surge arrestor shall be suitable for circuit breaker performing 0-0.3sec.-CO-3min-CO- duty in the system.

7.3.7 Surge arrestors shall have a suitable pressure relief system to avoid damage to the porcelain/ silicon polymeric housing and providing path for flow of rated fault currents in the event of arrestor failure.

7.3.8 The reference current of the arrestor shall be high enough to eliminate the influence of grading and stray capacitance on the measured reference voltage.

7.3.9 The Surge Arrestor shall be thermally stable and the bidder shall furnish a copy of thermal stability test with the bid.

7.3.10 The arrestor shall be capable of handling terminal energy for high surges, external pollution and transient over voltage and have low losses at operating voltages.

7.4 ARRESTOR HOUSING

7.4.1 The arrestor housing shall be made up of silicon polymeric housing and shall be homogenous, free

from laminations, cavities and other flaws of imperfections that might affect the mechanical and dielectric quality. The housing shall be of uniform brown colour, free from blisters, burrs and other similar defects.

Arrestors shall be complete with insulating bases, fastners for stacking units together, surge counters with leakage current meters and terminal connectors.

7.4.2 The housing shall be so coordinated that external flashover shall not occur due to application of

any impulse or switching surge voltage up to the maximum design value for arrestor. The arrestors shall

54

not fail due to contamination. The 11kV/33 kV arrestors housing shall be designed for pressure relief class as given in Technical Parameters of the specification.

7.4.3 Sealed housings shall exhibit no measurable leakage. 7.5 FITTINGS & ACCESSORIES

7.6.1 The surge arrestor shall be complete with insulating bases, fasteners for stacking units together, surge

counters with leakage current meters and terminal connectors. 7.6 SURGE MONITOR

7.6.1 A self contained discharge counter suitably enclosed for outdoor use and requiring no auxiliary or battery

supply for operation shall be provided for each single pole unit. Leakage current meter with suitable scale range to measure leakage current of surge arrestor shall also be supplied within the same enclosure. The number of operations performed by the arrestor shall be recorded by a suitable cyclometric counter and surge monitor shall be provided with an inspection window. There shall be a provision for putting ammeter to record the current/alarm contacts in the control room if the leakage current exceeds the permitted value. Similar provision shall be considered for surge counter also.

7.6.2 Surge monitor shall be mounted on the support structure at a suitable height so that the reading can be

taken from ground level through the inspection window and length of connecting leads up to grounding point and bends are minimum.

7.7 TESTS

7.7.1 Test on Surge Arrestors

The Surge Arrestors offered shall be type tested and shall be subjected to routine and acceptance tests

in accordance with IS: 3070 (Part-3)-1993. In addition, the suitability of the Surge Arrestors shall also be established for the following:

- Residual voltage test - Reference voltage test - Leakage current at M.C.O.V - P.D. test - Sealing test - Thermal stability test - Aging and Energy capability test - Watt loss test

Each metal oxide block shall be tested for guaranteed specific energy capability in addition to routine/acceptance test as per IEC/IS.

7.7.2 The maximum residual voltages corresponding to nominal discharge current of 10 kA for steep current, impulse residual voltage test, lightning impulse protection level and switching impulse level shall generally conform to Annex-K of IEC-99-4.

55

7.7.3 The surge arrestor housing shall also be type tested and shall be subjected to routine and acceptance tests in accordance with IS: 2071.

7.7.4 Galvanization Test All Ferrous parts exposed to atmospheric condition shall have passed the type tests and be subjected to

routine and acceptance tests in accordance with IS: 2633 & IS 6745. 7.8 NAME PLATE

7.8.1 The name plate attached to the arrestor shall carry the following information:

Rated Voltage Continuous Operation Voltage Normal discharge current Pressure relief rated current Manufacturers Trade Mark Name of Sub-station Year of Manufacturer Name of the manufacture Purchase Order Number along with date

7.9 TYPE AND RATINGS

Voltage class SL No.

Particulars 33 kV

1 Rated voltage of arrester, kV 30 2 Rated frequency, Hz 50 3 Nominal discharge current of arrester, kA 10 4 Maximum residual voltage at nominal

discharge current, kV (peak) 108

5 Maximum steep current impulse residual voltage at kV (kVP)

120

6 One minute power frequency withstand voltage of arrester insulation, kV (rms)

70

7 1.2 / 50 µ second impulse withstand voltage of arrester insulation, kV (peak)

170

9 Line discharge class 2 10 Insulator Housing a) Power frequency withstand test

voltage (wet) (kV rms) 70

b) Lightning impulse withstand tests voltage(KVp)

170

c) Pressure Relief Class 40 d) Creepage distance not less than

(mm) 900

56

3. TECHNICAL SPECIFICATION OF OUTDOOR CURRENT AND POTENTIAL TRANSFORMERS

5.1.0. SCOPE OF CONTRACT

5.1.1. This Section of the Specification covers general requirements for design, engineering, manufacture, assembly and testing at manufacturer’s works of 33kV and 11 kV outdoor Current and Potential Transformers.

5.2.0. STANDARDS

5.2.1. The equipment covered by this specification shall, unless otherwise stated be designed, constructed and tested in accordance with the latest revisions of relevant Indian Standards and shall conform to the regulations of local statutory authorities.

5.2.2. In case of any conflict between the Standards and this specification, this specification shall govern.

5.2.3. The current transformer shall comply also with the latest issue of the following Indian standard.

(i) IS: 2705(Part-I) Current transformers: General requirement. (ii) IS: 2705(Part-II) Current transformers : Measuring Current transformers (iii) IS: 2705(Part-III) Current transformers : Protective Current transformers (iv) IS: 2705(Part-IV) Current transformers: Protective Current transformers for

special purpose application. (v) IS: 3156(Part-I) Potential transformers: General requirement. (vi) IS: 3156 (Part-II) Potential transformers : Measuring Potential transformers (vii) IS: 3156 (Part-III) Potential transformers : Protective Potential transformers

5.3.0. GENERAL REQUIREMENTS

5.3.1. The cores of the instrument transformers shall be of high grade, non-aging CRGO steel of low hysteresis loss and high permeability.

5.3.2. Instrument transformers shall be of Dead Tank design or Live Tank design.

5.3.3. The instrument transformers shall be truly hermetically sealed POLYCRETE Type

5.3.4. A complete leak proof secondary terminal arrangement shall be provided with each instrument transformers, secondary terminal shall be brought into weather, dust and vermin proof terminal box. Secondary terminal boxes shall be provided with facilities for easy earthing, shorting, insulating and testing of secondary circuits. The terminal boxes shall be suitable for connection of control cable gland.

5.3.5. All instrument transformers shall be of single phase unit.

5.3.6. The instrument transformers shall be so designed to withstand the effects of temperature, wind load, short circuit conditions and other adverse conditions.

5.3.7. All similar parts, particularly removable ones, shall be interchangeable with one another.

5.3.8. All cable ferrules, lugs, tags, etc. required for identification and cabling shall be supplied complete for speedy erection and commissioning as per approved schematics.

5.3.9. The instrument transformers shall be designed to ensure that condensation of moisture is controlled by proper selection of organic insulating materials having low moisture absorbing characteristics.

5.3.10. All steel work shall be degreased, pickled and phosphated and then applied with two coats of Zinc Chromate primer and two coats of finishing synthetic enamel paint.

5.4.0. COMMON MARSHALLING BOXES

5.4.1. The outdoor type common marshalling boxes shall conform to the latest edition of IS 5039 and other general requirements specified hereunder.

5.4.2. The common marshalling boxes shall be suitable for mounting on the steel mounting structures of the instrument transformers.

5.4.3. One common marshalling box shall be supplied with each set of instrument transformers. The marshalling box shall be made of sheet steel and weather proof. The thickness of sheet steel used shall be not less than 3.0 mm. It is intended to bring all the secondary terminals to the common marshalling.

5.4.4. The enclosures of the common marshalling boxes shall provide a degree of protection of not less than IP 55 (As per IS 2147).

57

5.4.5. The common marshalling boxes shall be provided with double hinged front doors with pad locking arrangement. All doors and removable covers and plates shall be sealed all around with neoprene gaskets or similar arrangement.

5.4.6. Each marshalling box shall be fitted with terminal blocks made out of moulded non-inflammable plastic materials and having adequate number of terminals with binding screws washers etc. Secondary terminals of the instrument transformers shall be connected to the respective common marshalling boxes. All out going terminals of each instrument transformer shall terminate on the terminal blocks of the common marshalling boxes. The terminal blocks shall be arranged to provide maximum accessibility to all conductor terminals.

5.4.7. Each terminal shall be suitably marked with identification numbers. Not more than two wires shall be connected to any one terminal. At least 20 % spare terminals shall be provided over and above the required number.

5.4.8. All terminal strips shall be of isolating type terminals and they will be of minimum 10 A continuous current rating.

5.4.9. All cable entries shall be from bottom. Suitable removable gland plate shall be provided on the box for this purpose. Necessary number of cable glands shall be supplied fitted on to this gland plate. Cable glands shall be screw on type and made of brass.

5.4.10. Each common marshalling box shall be provided with two numbers of earthing terminals of galvanised bolt and nut type.

5.4.11. All steel, inside and outside work shall be degreased, pickled and phosphated and then applied with two coats of Zinc Chromate primer and two coats of finishing synthetic enamel paint. The colour of finishing paint shall be as follows: -

5.4.12. i) Inside: Glossy White

5.4.13. ii) Outside: Light Grey (Shade No. 697 of IS: 5)

5.5.0. TESTS 5.5.1. Routine/Acceptance Tests (all units) 5.5.2. All routine tests shall be carried out in accordance with relevant Standards. All routine/acceptance tests shall

be witnessed by the Employer/his authorised representative. 5.5.3. Type Tests: The bidder shall furnish type test certificates and results for the all tests as per relevant

Standards along with the bid for current and potential transformers of identical design.

5.5.4. Type test certificates so furnished shall not be older than 5 (five) years as on date of Bid opening.

5.6.0. NAME PLATES

5.6.1. All equipment shall have non-corrosive name plates fix at a suitable position indelibly mark with full particular there on in accordance with the standard adapted.

5.7.0. MOUNTING STRUCTURES

5.7.1. All the equipment covered under this specification shall be suitable for mounting on steel structures. Supply of mounting structures is also in the scope of this tender.

5.7.2. Each equipment shall be furnished complete with base plates, clamps, and washers etc. and other hardware ready for mounting on existing steel structures.

5.8.0. SAFETY EARTHING

5.8.1. The non-current carrying metallic parts and equipment shall be connected to station earthing grid. For this two terminals suitable for 40mm X 10mm GI strip shall be provided on each equipment.

5.9.0. TERMINAL CONNECTORS

5.9.1. The equipment shall be supplied with required number of terminal connectors of approved type suitable for ACSR/XLPE cable. The type of terminal connector, size of connector, material, and type of installation shall be approved by the Employer, as per installation requirement while approving the equipment drawings.

5.10.0. PRE-COMMISSIONING TESTS

5.10.1. Contractor shall carry out following tests as pre-commissioning tests. Contractor shall also perform any additional test based on specialties of the items as per the field instructions of the equipment Supplier or

58

Employer without any extra cost to the Employer. The Contractor shall arrange all instruments required for conducting these tests along with calibration certificates and shall furnish the list of instrument+s to the Employer for approval.

5.10.2. Current Transformers

(i) Insulation Resistance Test for primary and secondary.

(ii) Polarity test.

(iii) Ratio identification test - checking of all ratios on all cores by primary injection of current.

(iv) Dielectric test of oil (wherever applicable).

(v) Magnetising characteristics test.

(vi) Tan delta and capacitance measurement

(vii) Secondary winding resistance measurement

(viii) Contact resistance measurement (wherever possible/accessible).

5.10.3. Potential Transformers

(i) Insulation Resistance test for primary (if applicable) and secondary winding.

(ii) Polarity test.

(iii) Ratio test

(iv) Dielectric test of oil (wherever applicable).

(v) Tan delta and capacitance measurement of individual capacitor stacks.

(vi) Secondary winding resistance measurement.

5.11.0. TECHNICAL DATA SHEET FOR CURRENT AND POTENTIALTRANSFORMERS

5.11.1. For 33 kV/11kV CTs the instrument security factor at all ratios shall be less than 2.5 for metering core.

5.11.2. TYPE AND RATING:

All instrument transformer shall be outdoor type, single phase, polycrete type suitable for mounting on steel structure. The instrument transformer shall have the following ratings and particulars.

Ratings and Particulars SL N

o.

Item

33 KV 11 KV

A Nominal system voltage 33 kV 11 kV

B Highest system voltage, kV 36 12

C Rated frequency ,HZ 50 50 D System earthing Solidly earth Solidly earth

E Insulation level

a)

Impulse withstand voltage: kVp 170 70

b)

One minute p.f. Withstand voltage, kV (r.m.s.) 70 28

F Short time current for one second, kA 16 12.5

G Minimum creepage distance, mm 900 360

H Temperature rise As per ISS As per ISS

J TRANFORMER C.T.

(i) No. of Cores 3 3

(ii) Transformation ratio 200-100/5-5-5A 600-300/5-5-2.89A

(iii) Rated out put

(a) Core-1 30 VA 30 VA

(b) Core-2 15 VA 15VA (C) Core-3 - -

(iv) Accuracy class

(a) Core-1 0.5 0.5

(b) Core-2 5P 5P (C) Core-3 PS PS

(v) Accuracy limit factor

(a) Core-1 - -

59

Ratings and Particulars SL N

o.

Item

33 KV 11 KV

(b) Core-2 10 10

(C) Core-3 - -

(v) Instrument security factor

(a) Core-1 Less than 5 Less than 5

(b) Core-2 - -

(C) Core-3 - -

(v) Minimum Knee point voltage, Volts

(C) Core-3 100 Volts 100volts

FEEDER CT

(i) No. of Cores 2 2

(ii) Transformation ratio 400-200/5-5-5 400-200/5-5

(iii) Rated out put

(a) Core-1 30 VA 30 VA

(b) Core-2 15 VA 15 VA

(iv) Accuracy class

(a) Core-1 0.5 0.5

(b) Core-2 5P 5P

(v) Accuracy limit factor

(a) Core-1 - -

(b) Core-2 10 10

(v) Instrument security factor

(a) Core-1 <=5 <=5

(b) Core-2 - -

POTENTIAL TRANSFORMER 33kV/√3 /110V/√3

11kV/√3 /110V/√3

(a) Core-1 100 100

(b) Core-2 100 100

(vi) Accuracy class 0.5 05

(v) Rated voltage factor 1.2 1.2

(vi) Accuracy class 0.5 0.5

Note:

(i) It is intended to use different ratios of the same CT at the same time for differential protections and metering cores. The CTS should therefore be suitable for the above purpose by secondary tapings only. The ratio change by secondary taps is acceptable as long as the required CT specifications are achieved at all ratios.

(ii) The knee point voltage specified above shall be at higher ratio/ taps.

1.

60

4. TECHNICAL SPECIFICATION FOR AAA “WOLF” & “RACCOON” CONDUCTOR 1.0 Scope

This specification covers design, manufacture, testing at works, transport, insurance, storage, erection and commissioning of All Aluminum Alloy Stranded Conductors at site in 33 KV.

2.0 Conductor Size i) 19/3.40 mm (175 mm² Alloy Area) – wolf ii) 7/3.81 mm ( 80 mm² Alloy Area ) - Raccoon

3.0 Applicable Standards

Unless otherwise stipulated in this specification, the conductor shall comply with IS:398 (Part-IV)- 1994 or the latest version thereof.

4.0 Properties of Wires

The properties of Aluminium alloy wires to be used in the construction of the stranded conductors shall be as in the following Table-1

Table-1

Diameter

Cross area of nominal

Dia wire

Mass Maximum

breaking load after stranding

Resistance at 20° C

Nominal Min Max Max Stamdard Mm mm mm mm

2 Kg/Km KN Ohm/Km Ohm/Km

3.40 3.37 3.43 9.079 24.51 2.80 3.67 3.96

3.81 3.77 3.85 11.401 30.78 3.34 2.938 2.851

5.0 Properties of Conductors

The properties of stranded all aluminium alloy conductors of various sizes shall be as in the following table-II All Aluminium Alloy Conductors ( AAAC)

Nominal Alloy Area

Stranding & Wire dia

Sectional area

Approx. overall dia

Approx. Mass

Calculated

resistance at 20° C (Max)

Approx calculated breaking

load

1 2 3 4 5 6 7

mm2

Mm mm2 mm Kg/Km Ohm/Km KN

173 19/3.40 172.52 17.00 474.02 0.1969 50.54

80 7/3.81 79.81 11.43 218.26 0.425 23.41

6.0 Free From Defects

The wire shall be smooth and free from all imperfection such as spills, splits etc. 7.0 Joints in Wires

Conductors containing three/seven wires. There shall be no joint in any wire of a stranded conductor containing three/seven wires except those made in the base rod or wire before final drawing.

8.0 Stranding 8.1 The wires used in the construction of a stranded conductor shall before stranding satisfy all the relevant

requirements of this standard. 8.2 The lay shall be within the limits given in Table-III Lay Ratios for Aluminium Alloy Stranded Conductors

No. of wires in conductors Lay ration

Min. Max

7 10 14

19 10 16 8.3 The outer layer shall be right handed. The wires in each layer shall be evenly and closely stranded. 9.0 Climatic Conditions

The conductor shall be designed to suit for the climatic conditions specified in these bidding documents. 10.0 Tests

61

The samples of individual wires for the test shall normally be taken before stranding. The manufacturer shall carry out test on samples taken out at least from 10% of aluminium wire spools. However, when desired by the purchaser, the test sample may be taken form the stranded wires. However the minimum breaking load test shall be done on a sample taken from stranded wires and the minimum breaking load shall not be less than the value indicated in Table-I. The wires for alloy conductors shall comply with the following tests as per IS: 398(Part-IV)-1994 i) Breaking loads test. ii) Elongation test iii) Resistance test

11.0 Packing and Marking

The conductors shall be owned in reels or drums conforming to the latest version of IS: 1778-1980 “ Specification for reels and drums for bare wire and name of the project TDF shall be indicated clearly on the drums.

10.1 Packing 10.1.1 The gross mass of packing of various conductors shall not exceed by more than 10% of the values given in the

following table:

Conductor size Gross Mass

175 mm2 alloy area ( 19/3.40mm) 2500

80 mm² Alloy Area (7/3.81 mm) 1600 KG

10.1.2 The normal length of various conductors shall be as given in the following table:

Conductor size Normal Length

175 mm2 alloy area ( 19/3.40mm) 1.1 Km

80 mm² Alloy Area (7/3.81 mm) 1.3 KM

10.1.3 Longer lengths shall be acceptable. 10.1.4 Short length , not less than 50% of the normal length shall be acceptable to the maximum extent of 10% of the

quantity ordered 10.2 marking.

The following information be marked on each package. a) Manufacturer’s name. b) Trade Mark, if any. c) Drum or identification number. d) Size of conductor e) Number & lengths of conductor f) Gross Mass of the package g) Net mass of the conductor h) ISI certification mark. i) Name of the Project TDF

11 INSPECTION

All tests and inspection shall be made at the place of manufacture. The manufacturer shall afford the inspection representing the purchaser or third party nominee all reasonable facilities without charge to satisfy him that the material is being furnished in accordance with this specification.

62

5. TECHNICAL SPECIFICATION FOR CABLE END TERMINAL KIT (OUTDOOR AND INDOOR)

Heat shrinkable termination Kit for 6.35/11kV XLPE ,Cable ( 1-core,300 sq mm & 185 sqmm, 3-core -120 sqmm ) both for outdoor and indoor should be as per IS : 13753 and relevant international standard. The terminal cable kit should be for the following technical parameter of cable.

SPECIFIC TECHNICAL REQUIREMENTS:-

Technical parameters of the cable shall be as follows:

Sl No

Particulars Unit

1 Rated voltage of cable KV 6.35/11kV

2 Type of insulation - XLPE

3 Core - Single , 4 Armoured /Unarmoured - Armoured

5 Material of Conductor Aluminium

6 System Voltage - 11 KV Earthed

7 Highest System Voltage KV 12

8 Conductor Size Sq. mm 300 Sq mm , 1- core 185 Sq mm , 1- core And 120 sqmm,3-core

9 Material - Stranded Aluminium

ELECTRICAL PERFORMANCE FOR TERMINAL KIT

AC Dry withstand voltage 35 KV / 1 minute

DC withstand voltage for 30 minute 48 KV

Lighting impulse withstand voltage 75 KV Partial Discharge 12.7 KV < 5 pc

Standard tail length for outdoor 600 mm

Standard tail length for indoor 450 mm

KIT COMPONENT

Terminal Lug 1 No

Heat Shrinkable Adhesive Lined Terminal Sleeve

1 No

Lug Sealing Tape / Mastic 1 Strip Rain Shed for 12 KV System 2 Nos.

Anti Tracking Sleeve 1 No.

Stress Control Sleeve 1 No

Stress Control Mastic 1 Strip

Constant Force Spring Roll 1 No

Copper Braid for Screen Earthing 1 No

Worm Drive Clip 1 No

Adhesive Line Gland Sleeve 1 No Tinned Copper Braid duly fitted with

Terminal Lug at one end + Solder Bock 1 No

63

6. TECHNICAL SPECIFICATION OF CONTROL CABLES

1.0 SCOPE: 1.1 Specification calls for design, manufacture, stage testing, inspection and testing beforedispatch,

packing and delivery of Copper control cables and Aluminum power cables for 33/11KV substations. 1.2 The control and power cables shall be ISI marked, 1.1 KV Grade. The cores shall have a size of 2.5

sq.mm for control cables and 4 sq. mm. power cable, using solid/stranded Copper conductor with different number of cores as specified below:-

1.3 COPPER CONTROL CABLES Unarmoured

i) 12 Core 2.5 sq.mm, solid conductor ii) 7 Core 2.5 sq.mm., solid conductor. iii) 4 Core 2.5 sq.mm., solid conductor iv) 2 Core 2.5 sq.mm., solid conductor

2.0 STANDARDS: 2.1 The control and power cables shall conform to the latest applicable Indian Standards. In case bidders

offer control and power cables conforming to any other International Standards which shall be equivalent or better than IS, the same is acceptable. Cables for which Indian Standards arenot available, the relevant equivalent International Standards will be applicable. Please attach photocopy of all such standards according to which the cables have been offered

(i). IS: 1554: PVC insulated (Heavy Duty) Control Cables for working voltage & including 1100 Volts. (ii). IS: 3961: Recommended current ratings for PVC insulated and PVC sheathed heavy duty cables (iii). IS: 4905: Methods of random sampling (iv). IS: 5831: PVC insulation and sheath of electric cables (v). IS: 8130: Conductors for insulated electric cables and flexible cords (vi). IS: 10418: Wooden drums of electric cables (vii). IS: 10810: Methods of tests for cables

3.0 GENERAL TECHNICAL REQUIREMENTS AND CONSTRUCTIONAL DETAILS:

3.1 Cables shall be suitable for laying on racks, in ducts, trenches, conduits and underground buried installation with chances of flooding by water. Cables shall be designed to withstand mechanical, electrical and thermal stresses developed under steady-state and transient operating conditions as specified elsewhere in this specification.

3.2 CONTROL CABLES

Control cables shall be of 1.1 KV grade, multicore (as specified in Clause 1.3 above), PVC insulated, PVC inner sheathed, un armoured, PVC outer sheathed with solid copper conductor conforming to latest version of IS: 1554 or equivalent International Standards.

3.3 The conductor shall be made from high conductivity copper rods complying with latest version of IS:613 or equivalent International Standards. The conductor shall consist of annealed copper wires complying with IS: 8130 with latest amendments or equivalent International Standards.

3.4 POWER CABLES: Power cable shall be of 1.1 KV grade, multicore (as specified in Clause 1.3 above), PVC insulated, PVC inner sheathed, PVC outer sheathed with stranded conductor.

3.5 INSULATION: Conductor shall be provided with PVC insulation applied by extrusion in accordance with latest version of IS: 5831 or equivalent International Standards. The average thickness of insulation shall be in accordance with the IS: 1554 (Part-I) with latest amendments or equivalent International Standards. Insulation shall be so applied that it fits closely on the conductor and shall be possible to remove it without damages to the conductor.

3.6 CODE IDENTIFICATION:

Colouring of insulation shall identify cores of the cables of upto 5 cores. Following colour schemes shall be adopted:-

SN No of

Cores Colour Scheme

1 2 core Red and Black

2 4 core Red, Yellow, Black, Blue and Grey

3 5 core a) Two adjacent cores (counting and direction core) in each layer, Blue and Yellow, remaining cores Grey or in accordance with the scheme given in IS 1554 b). Cables having more than 5 cores, as an alternate to the provision of

(a) above, core identification may be done by numbers as indicated in latest version of IS: 1554 (PART-I) 10 core identification.

3.7 LAYING UP OF CORES:

64

In multi-core cables, the cores shall be laid up together with a suitable lay, the outer most layer shall have right-hand lay and successive layer shall be laid with opposite lay, where necessary, the interstices shall be filled with non hygroscopic materials.

3.8 INNER SHEATH:

The laid up cores shall be provided with inner sheath applied by extrusion. It shall be ensured that the shape be as circular as possible. The inner sheath shall be so applied that it fits closely on the laid up cores and it shall be possible to remove it without damage to the insulation. Thickness of inner sheath shall be conforming to latest version of IS: 1554 (Part-I) or equivalent International Standards.

3.9 FILLER AND INNER SHEATH:

Filler and inner sheath shall be of the following: Unvulcanised rubber, or Thermoplastic materials, or Proofed tape (for inner sheath only)

Unvulcanised rubber or thermoplastic material used shall not be harder than PVC used for insulation and outer sheath. Material shall be chosen to be compatible with temperature ratings of the cable and shall have no deterious effect on any other component of the cable.

3.10 OUTER SHEATH:

The Over theouter sheath shall be applied by extrusion. It shall be applied: inner sheath in case of unarmoured multicore cables Outer sheath shall be so applied that it fits closely over insulation / inner sheath / armouring. It shall be possible to remove it without damage to the insulation / inner sheath. The colour of the outer sheath shall be black.Thickness of outer sheath insulation shall conform to latest version of IS: 1554 Part-I or equivalent international standards.

4.0 IDENTIFICATION: 4.1 In addition to manufacurer’s identification on cable as per clause-17.1 of IS: 1554 (Part-I) with latest

amendments, following marking shall also be embossed over outer sheath at every three meters:-

Cable size and voltage grade Word “APDCL” and Name of manufacturer ISI marking and sequential marking by means of embossing The embossing shall be in line throughout the length of the cable and shall be legible and indelible.

5.0 PACKING AND MARKING: 5.1 Cables shall be supplied in non-returnable drums. The surface of the drum and outer most cable layer

shall be covered with waterproof layer. Both the ends of the cables shall be properly sealed with heat shrinkable PVC or rubber caps, secured by ‘U’ nails so as to elliminate ingress of water during transportation storage and erection. Following information should be stenciled on the drum:

Reference no of relevant Indian or International Standard. Manufacturer’s name, brand name or trade mark Type of cable and voltage grade Number of cores Nominal cross-sectional area of the conductor Cable code Colour of cores Length of cable on the drum Number of lengths on drum (if more than one) Direction of rotation of drum by means of an arrow Approximate gross weight Running end of cable Country of manufacturer and year of manufacture

5.2 As mentioned, the cable drum must bear relevant Indian/International Standard certification Mark. In this connection, a certified photostat copy of valid standard marking license rights duly attested must be submitted along with the inspection offer as documentary evidence. In absence of these documents, the inspection offer will not be considered.

6.0 STANDARD DRUM LENGTH: 6.1 Standard drum length for cable shall be 500/250 metres. 6.2 TOLERANCE:

Tolerance on the overall diameter of the Cable shall be ± 2 mm over the declared value in the techanical data sheets of Guaranteed Technical Particulars. Length per drum shall be subjected to maximum tolerance of ± 5% of the standard drum length. The Employer shall have option to reject cable drums with shorter length. Over all tolerance in total quantity for each type and size of cables shall be ± 2%.

65

7.0 TESTS: 7.1 All types and sizes of cable being supplied shall be subjected to Type tests, Additional test,

Routine tests and Acceptance tests as specified below at the expense of manufacturer and according to relevant standards.

7.2 TYPE TESTS AND ADDITIONAL TESTS:

It is essential to furnish all the type test reports for each type and size of cable as stipulated in latest version of IS: 1554 (Part-I) and following Additional Tests:

Loss of mass test Heat shock test Thermal stability test Accelerated water absorption test Dielectric strength retention test Above tests shall be conducted in NABL approved Testing laboratories only.

7.3 ACCEPTANCE TEST

Acceptance test shall be caried out on each type and size of cables on cable drums selected at random as per following plan :-

. S.No

Numbers of Drums in the Tests

Number of Drums to be taken as samples

1 Upto 50 2

2 51 to 100 5

3 From 101 to 300 13

4 From 301 to 500 20

5 From above 501 32

7.4 The following shall constitute acceptance tests :-

Annealing Test Conductor Resistance Test Wraping Test Tensile Test Test for Thickness of Insulation and Sheath Tensile Strength and elongation test before ageing and after ageing at break of insulation and sheath High Voltage Test (Water Immersion Test) High Voltage Test at Room Temperature

7.5 ROUTINE TESTS:

Routine test shall be carried out for each drum of cables of all types and sizes. Following shall constitute routine tests :

Conductor Resistance Test Resistance Test High Voltage Test at Room Temperature

7.6 While preparing cable schedules for control/protection purpose following shall be ensured:

i. Separate cables shall be used for AC & DC.

ii. For different cores of CT & PT/CVT separate cable shall be used

iii. At least one (1) cores shall be kept as spare in each copper control cable of 4C, 5C or 7C size whereas minimum no. of spare cores shall be two (2) for control cables of 10 core or higher size.

iv. For control cabling, including CT/PT circuits, 4.0 sq.mm. size copper cables shall be used per connection

66

7. TECHNICAL SPECIFICATION OF 33 KV CROSS LINKED POLYETHYLENE INSULATED POWER CABLE

8.1.0. SCOPE

8.1.1 This section of the specification covers the manufacture, testing at manufactures works of 33 kV,

single core, aluminium conductor, cross Linked Polyethylene Insulated Power Cable (XLPE} complete

with all accessories as specified for use with effectively earthed system.

8.2.0. STANDARDS

6.6.1 Unless otherwise specified, the cables and its accessories shall conform, in all respects, to following

standards with latest amendment or latest edition:

(i). IS: 7098 / IEC: 60502.

(ii). IS: 8130 / IEC: 60228.

(iii). IS: 5831

(iv). IS: 10418

(v). IEC: 60840

8.3.0. GENERAL

8.3.1 The cable shall be 33 kV (E) grade, single core, unarmoured, stranded compacted Aluminium

conductor with conductor and insulation screens conforming to latest editions of IS 7098 / IEC

60502.

8.3.2 The cable shall be suitable for laying underground or in cable trenches and chances of flooding by

water and suitably designed by the addition of chemicals in the outer sheath to be protected against

rodent and termite attack.

8.3.3 Outer sheathing should be designed to afford high degree of mechanical protection and should also be

heat, oil chemicals and weather resistant. Common acid Alkalis and saline solution should not have

adverse effect on the PVC sheathing material used.

8.3.4 The XLPE insulated shall be manufactured & tested in accordance with the IS 7098 Part-III and shall

also conform to the requirements of internationally accepted standards IEC 60502-2 (applicable

clauses only) for construction and IEC 60840 for testing. The terminating accessories shall conform

to IEC 60840.

8.4.0. CONSTRUCTION

8.4.1 Conductor

The cable conductor shall be made from stranded H.D. aluminium to form compact circular shaped

conductor having resistance within limits specified in IS 8130 / IEC 60228 and any amendment

thereof.

8.4.2 Conductor Screen

Conductor shield/ screening shall consist of an extruded layer of thermosetting black semi

conducting compound which shall be firmly bonded to the outer surface of the conductor and should

cover the whole surface of the conductor and suitable for the operating temperature of the cable and

compatible with the insulating material. The nominal thickness of the conductor screen should be as

per latest relevant IEC.

8.5.0. Insulation

The XLPE insulation should be suitable for specified system voltages. The manufacturing process

shall ensure that insulations shall be free from voids. The insulation shall withstand mechanical and

thermal stressed under steady state and transient operating conditions. The extrusion method

should give very smooth interface between semi-conducting screen and insulation. The insulation of

the cable shall be of high standard quality, generally confirming to IEC-60502 and I.S. 7098 Part-

II/1988 (latest edition).

8.6.0. Moisture Barrier

Longitudinal water barrier:

The longitudinal water barrier shall be applied over insulation screen by a layer of non woven

synthetic tape with suitable water swellable absorbent.

67

Radial Moisture Barrier:

This shall be of extruded lead alloy “E” sheath (as per IS 7098: Part III).

8.7.0. Metallic Screen

The metallic screen shall be of plain copper wires, helically applied over the radial moisture barrier.

A binder tape of annealed plain copper shall be applied in the form of an open helix over the copper

wire screen.

The combination of the metallic sheath (lead sheath) in combination with wire screen shall be

designed to meet the requirement of the system short circuit rating of 40 KA for 1 sec.

8.8.0. Outer Sheath

Suitable semi conducting layer coated on extruded PVC outer sheath confirming to IEC: 60502, shall

be applied over armouring with suitable additives to prevent attach by rodents and termites.

8.9.0. CURRENT RATING

The cable will have current ratings and de-rating factors as per relevant standard IEC.

The one-second short circuit rating values each for conductor; screen & armour shall be furnished

and shall be subject to the purchaser’s approval.

The current ratings shall be based on maximum conductor temperature of 90 deg. C with ambient

site condition specified for continuous operation at the rated current.

8.10.0. OPERATION

Cables shall be capable of satisfactory operation under a power supply system frequency variation

of plus minus 3% voltage variation of plus, minus 10% and combined frequency voltage variation of

10% (absolute sum).

Cable shall be suitable for laying in cable trenches or buried under ground.

Cable shall have heat and moisture resistance properties. These shall be of type and design with

proven record on transmission network service.

8.11.0. ROUTINE TESTS AND ACCEPTANCE TESTS

All routine and acceptance tests shall be carried as per ISS-7098/IEC-60871.

8.12.0. DATA SHEET

Sl. No.

Description Parameters

1 Voltage Grade (Uo/U), kV 33 kV

2 No. of cores 1

3 Size (mm2) 120 mm

2

4 Nominal system voltage KV 33

5 Highest system voltage KV 36

6 System earthing Effectively earthed

7 System Frequency Hz 50

8 Variation in Frequency (+/-)3%

9 Fault level individually for

a) Conductor 25 kA for 1sec

b) Cu.Screen 25 kA for 1sec

10 Maximum allowable temperature

a) Design continuous operation at rated, full load current, the max, temperature of conductor shall not exceed.

0C

90

b) The conductor temperature after a short circuit for 1.0 sec shall not exceed.

250

11 Basic insulation level, KVP (1.2/50 Micro Second Wave)

170

12 1-min. power frequency withstand voltage, kV (rms)

70

68

8. Technical specifications for 33kV Isolators

7.1.0. SCOPE

7.1.1. This section of the specification is intended to cover design specifications for manufacture and testing of 33 KV gang operated switch (Isolators) with all fittings and accessories.

7.1.2. The Isolators are for outdoor installation suitable for horizontally mounting on mounting structures and for use at sub-stations.

7.1.3. Isolators shall be supplied with Earth Switch as and where specified.

7.2.0. GENERAL

7.2.1. The Isolators and accessories shall conform in general to IS 9921 (or IEC: 62271-102) except to the extent explicitly modified in specification.

7.2.2. All isolating switches and earthing switches shall have rotating blades and pressure releasing contacts. All isolating and earth switches shall operate through 90° angle from closed position to fully open position.

7.2.3. Complete isolator with all the necessary items for successful operation shall be supplied including but not limited to the following:

(i). Isolator assembled with complete base frame, linkages, operating mechanism, control cabinet, interlocks etc.

(ii). All necessary parts to provide a complete and operable isolator installation, control parts and other devices whether specifically called for herein or not.

(iii). The isolator shall be designed for use in the geographic and meteorological conditions as specified in this document..

7.3.0. DUTY REQUIREMENTS

7.3.1. Isolators and earth switches shall be capable of withstanding the dynamic and thermal effects of the maximum possible short circuit current of the systems in their closed position. They shall be constructed such that they do not open under influence of short circuit current.

7.3.2. The earth switches, wherever provided, shall be mechanically interlocked so that the earth switches can be operated only when the isolator is open and vice versa. The constructional interlocks shall be built in construction of isolator and shall be in addition to the electrical and mechanical interlocks provided in the operating mechanism.

7.3.3. In addition to the constructional interlock, isolator and earth switches shall have provision to prevent their electrical and manual operation unless the associated and other interlocking conditions are met. All these interlocks shall be of failsafe type. Suitable individual interlocking coil arrangements shall be provided. The interlocking coil shall be suitable for continuous operation from DC supply and within a variation range as stipulated elsewhere in this specification.

7.3.4. The earthing switches shall be capable of discharging trapped charges of the associated lines.

7.3.5. The isolator shall be capable of making/breaking normal currents when no significant change in voltage occurs across the terminals of each pole of isolator on account of make/break operation.

7.3.6. The isolator shall be capable of making/breaking magnetising current of 0.7A at 0.15 power factor and capacitive current of 0.7A at 0.15 power factor at rated voltage.

7.4.0. CONSTRUCTIONAL DETAILS

7.4.1. All isolating switches and earthing switches shall have rotating blades and pressure releasing contacts. All isolating and earth switches shall operate through 90° angle from closed position to fully open position.

7.4.2. Contacts:

a) The contacts shall be self-aligning and self-cleaning and so designed that binding cannot occur after remaining closed for prolonged periods of time in a heavily polluted atmosphere.

b) No undue wear or scuffing shall be evident during the mechanical endurance tests. Contacts and spring shall be designed so that readjustments in contact pressure shall not be necessary throughout the life of the isolator or earthing switch. Each contact or pair of contacts shall be independently sprung so that full pressure is maintained on all contacts at all time.

69

c) Contact springs shall not carry any current and shall not lose their characteristics due to heating effects.

d) The moving contact of double break isolator shall have turn-and -twist type or other suitable type of locking arrangement to ensure adequate contact pressure.

7.4.3. Blades:

a) All metal parts shall be of non-rusting and non-corroding material. All current carrying parts shall be made from high conductivity electrolytic copper/aluminium. Bolts, screws and pins shall be provided with lock washers. Keys or equivalent locking facilities if provided on current carrying parts, shall be made of copper silicon alloy or stainless steel or equivalent. The bolts or pins used in current carrying parts shall be made of non-corroding material. All ferrous castings except current carrying parts shall be made of malleable cast iron or cast-steel. No grey iron shall be used in the manufacture of any part of the isolator.

b) The live parts shall be designed to eliminate sharp joints, edges and other corona producing surfaces, where this is impracticable adequate corona shield shall be provided. Corona shields/rings etc., shall be made up of aluminum/aluminum alloy.

c) Isolators and earthing switches including their operating parts shall be such that they cannot be dislodged from their open or closed positions by short circuit forces, gravity, wind pressure, vibrations, shocks, or accidental touching of the connecting rods of the operating mechanism.

d) The switch shall be designed such that no lubrication of any part is required except at very infrequent intervals i.e. after every 1000 operations or after 5 years whichever is earlier.

7.4.4. Insulators:

a) The insulator shall conform to IS: 2544 and/or IEC-60168. The insulators shall have a minimum cantilever strength of 600/400 Kgs. for 145/33 kV insulators respectively.

b) Pressure due to the contact shall not be transferred to the insulators after the main blades are fully closed.

7.4.5. Base:

Each isolator shall be provided with a complete galvanised steel base provided with holes and designed for mounting on a supporting structure.

7.5.0. EARTHING SWITCHES

7.5.1. Where earthing switches are specified these shall include the complete operating mechanism and auxiliary contacts.

7.5.2. The earthing switches shall form an integral part of the isolator and shall be mounted on the base frame of the isolator.

7.5.3. The earthing switches shall be constructionally interlocked with the isolator so that the earthing switches can be operated only when the isolator is open and vice versa. The constructional interlocks shall be built in construction of isolator and shall be in addition to the electrical interlocks.

Suitable mechanical arrangement shall be provided for de-linking electrical drive for mechanical operation.

7.5.4. Each earth switch shall be provided with flexible copper/aluminum braids for connection to earth terminal. These braids shall have the same short time current carrying capacity as the earth blade. The transfer of fault current through swivel connection will not be accepted.

7.5.5. The frame of each isolator and earthing switches shall be provided with two reliable earth terminals for connection to the earth mat.

7.5.6. Isolator design shall be such as to permit addition of earth switches at a future date. It should be possible to interchange position of earth switch to either side.

7.5.7. The earth switch should be able to carry the same fault current as the main blades of the Isolators and shall withstand dynamic stresses.

7.6.0. OPERATING MECHANISM

7.6.1. The bidder shall offer manual operated Isolators and earth switches.

7.6.2. Control cabinet/operating mechanism box shall be made of aluminum sheet of adequate thickness (minimum 3 mm).

7.6.3. Manual operation facility (with handle) should be provided with necessary interlock to disconnect motor.

7.6.4. Gear should be of forged material suitably chosen to avoid bending/jamming on operation after a prolonged period of non-operation. Also all gear and connected material should be so chosen/surface treated to avoid rusting.

70

7.7.0. OPERATION

7.7.1. The main Isolator and earth switches shall be gang operated.

7.7.2. The design shall be such as to provide maximum reliability under all service conditions. All operating linkages carrying mechanical loads shall be designed for negligible deflection. The length of inter insulator and interpole operating rods shall be capable of adjustments, by means of screw thread which can be locked with a lock nut after an adjustment has been made. The isolator and earth switches shall be provided with “over center” device in the operating mechanism to prevent accidental opening by wind, vibration, short circuit forces or movement of the support structures.

7.7.3. Each isolator and earth switch shall be provided with a manual operating handle enabling one man to open or close the isolator with ease in one movement while standing at ground level. Detachable type manual operating handle shall be provided. Suitable provision shall be made inside the operating mechanism box for parking the detached handles. The provision of manual operation shall be located at a height of 1000 mm from the base of isolator support structure.

7.7.4. All rotating parts shall be provided with grease packed roller or ball bearings in sealed housings designed to prevent the ingress of moisture, dirt or other foreign matter. Bearings pressure shall be kept low to ensure long life and ease of operation. Locking pins wherever used shall be rustproof.

7.7.5. Signaling of closed position shall not take place unless it is certain that the movable contacts, have reached a position in which rated normal current, peak withstand current and short time withstand current can be carried safely. Signaling of open position shall not take place unless movable contacts have reached a position such that clearance between contacts is atleast 80% of the isolating distance.

7.7.6. The position of movable contact system (main blades) of each of the Isolators and earthing switches shall be indicated by a mechanical indicator at the lower end of the vertical rod of shaft for the Isolators and earthing switch. The indicator shall be of metal and shall be visible from operating level.

7.7.7. The contractor shall furnish the following details along with quality norms, during detailed engineering stage.

(i) Current transfer arrangement from main blades of isolator along with millivolt drop immediately across transfer point.

(ii) Details to demonstrate smooth transfer of rotary motion from motor shaft to the insulator along with stoppers to prevent over travel.

7.8.0. TEST AND INSPECTION

7.8.1. The switches shall be subjected to the following type test in accordance to with IS: 9920.

I) Dielectric test (impulse and one minute) power frequency withstands voltage. II) Temperature rise test III) Rated off load breaking current capacity IV) Rated active load breaking capacity V) Rated line charging breaking capacity VI) Rated short time current VII) Rated peak withstand current VIII) Mechanical and Electrical Endurance

7.8.2. The equipment shall be subjected to the following routine test.

I) Power frequency voltage dry test II) Measurement of resistance of the main circuit III) Operating test.

7.8.3. The porcelain will have pull out test for embedded component and beam strength of porcelain base.

7.9.0. AUXILIARY SWITCHES

7.9.1. All isolators and earth switches shall be provided with 110 volts, 6 Ampere auxiliary switches for their remote position indication on the control board and for electrical interlocking with other equipment. In addition to the auxiliary switches required for remote position indications and for their operation. There shall be six pairs of NO and six pairs of NC contacts for each isolating switch and three pairs of NO and three pairs of NC contacts for each earthing switch. All contacts shall be brought out to terminal blocks

7.10.0. CONNCTORS

71

7.10.1. Each isolator shall be provided with appropriate number of bimetallic clamping type connectors as detailed in the schedule of requirement. The maximum length of jumper that may be safely connected or any special instruction considered necessary to avoid under loads on the post isolators should be stated by the tenderer.

7.11.0. SUPPORTING STRUCTURES

7.11.1. All isolators and earthing switches shall be rigidly mounted in an upright position on their own supporting structures. Details of the supporting structures shall be furnished by the successful tenderer. The isolators should have requisite fixing details ready for mounting them on switch structures.

7.12.0. PRE-COMMISSIONING TESTS

7.12.1. Contractor shall carry out following tests as pre-commissioning tests. Contractor shall also perform any additional test based on specialties of the items as per the field instructions of the equipment Supplier or Employer without any extra cost to the Employer. The Contractor shall arrange all instruments required for conducting these tests along with calibration certificates and shall furnish the list of instruments to the Employer for approval.

(a) Insulation resistance of each pole. (b) Manual operation and interlocks. (c) Insulation resistance of auxiliary contacts. (d) Ground connections. (e) Contact resistance. (f) Proper alignment so as to minimise to the extreme possible the vibration during operation. (g) Measurement of operating Torque for isolator and Earth switch. (h) Resistance of operating and interlocks coils. (i) Functional check of the control schematic and mechanical interlocks. (j) 50 operations test on isolator and earth switch.

7.13.0. TECHNICAL DATA SHEET FOR ISOLATORS

SL No.

Technical Particulars 33 kV

1 Nominal system voltage, kV 33 2 Highest system voltage, kV 36 3 Rated frequency, Hz. 50 4. Type of Isolator Double Break, center pole

rotating 5 Rated continuous current, A 630 6 Rated short time current, kA 25 7 Rated duration of short time current, Second 1 8 Control voltage 110V DC 9 Rated lightning impulse withstand voltage, kV

(peak) i) To earth & between poles ii) Across isolating distance

170 180

10 Rated 1 minute power frequency withstand voltage, kV (rms) i) To earth & between poles ii) Across isolating distance

70 80

11 Minimum creepage distance of insulators, mm 900

12 Temperature rise As per relevant IS

72

9. TECHNICAL SPECIFICATION FOR AC 3 PHASE 4 WIRE CT- PT OPERATED FULLY

STATIC THREE VECTOR ENERGY METER (with AMR Compatibility) With Meter Cabinet.

1. OBJECTIVE & SCOPE This specification shall cover design, engineering, manufacture, assembly, inspection, testing at manufacturers works before dispatch, packing, supply and delivery at destination (including transit insurance), 0.5S/0.2S accuracy class fully static 3 phase–4 wire CT-PT operated three-vector energy meter for R-APDRP works along with other metering accessories such as metering cabinet, CTs and PTs of relevant accuracy class etc. detailed out in the specification. The meter shall be suitable for measurement of different electrical parameters as per the energy and power demand requirement in an AC balanced/unbalanced system over a power factor range of zero lag to unity to zero lead. These meters should have communication port to interface for remote meter reading (AMR Compatible). 2. APPLICATION

a) As Boundary Meters for Ring fencing of an Area - 0.5S class

b) In Substation on incoming/Outgoing HT feeders - 0.5S class

c) On Distribution Transformers – 0.5S class

d) HT Consumers – 0.5S class

3. WORKING ENVIRONMENT

As per IS 14697-1999 (reaffirmed 2004). Meter to perform satisfactorily under Non-Air Conditioned environment (within stipulations of IS) IP 51 housing for indoor use and IP 55 degree of protection and sealing arrangement for outdoor use. The meter shall be suitable designed for satisfactory operation under the hot and hazardous tropical climate conditions and shall be dust and vermin proof. All the parts and surface, which are subject to corrosion, shall either be made of such material or shall be provided with such protective finish, which provided suitable protection to them from any injurious effect of excessive humidity.

4. SERVICE CONDITION The meter shall be suitable for satisfactory continuous operation under the following tropical conditions:- a) Maximum ambient temperature in a closed box : 65 °C b) Maximum ambient temperature in shade : 55 °C c) Relative Humidity : 10 to 95%(condensing) d) Maximum annual rainfall : 2280 mm’ e) Maximum wind pressure : 150 Kg/m. sq. f) Maximum altitude above mean sea level : up to1000 meters g) Isoceraunic level : 60 days/year h) Seismic level (Horizontal acceleration) : 0.3g i) Average number of thunderstorms/annum : 40 (5 months) k) Minimum ambient air temperature : -10°C The climate is moderately hot and humid, conducive to rust and fungus growth. The climatic conditions are also prone to wide variations in the ambient conditions. Smoke is also present in atmosphere. Lighting also occurs during rainy season.

73

5. APPLICABLE STANDARDS Unless otherwise stated elsewhere in this specification the energy meter shall be of accuracy Class 0.5S/0.2S for active/reactive /apparent energy and conform to relevant clauses of following standards or report to be read with up to date and latest amendments/revision thereof in all respect: -

1. Guidelines on “Data Exchange for Electricity Meter Reading, Tariff and Load Control –

Companion Specification” related to IEC 62056 series of standards; 2. IS-14697/1999 (reaffirmed 2004) Specification for AC Static Transformer operated Watt

Hour & VAR-Hour meters (class 0.5S & 0.2 S);

3. IS-15707 Specification for Testing, evaluation, installation & maintenance of AC Electricity

Meters-Code of Practice;

4. CBIP Report No. 88 /No. 304 : Specification for AC Static Electrical Energy Meters.

5. Metering code for Assam Grid Regulations-2004 by AERC.

The equipment meeting with the requirements of other authoritative standards, which ensure

equal or better quality than the standard mentioned above, also shall be considered; in case of

conflict related with communication protocol, the Guidelines on “Data Exchange for Electricity

Meter Reading, Tariff and Load Control – Companion Specification” shall prevail upon. For any

unresolved conflict related with other parts of this specification the order of priority shall be – 1.

Standard Technical specification for 3p/4w CT/PT operated fully static AMR compatible Tri-

vector energy meters for R-APDRP projects. II. IS 14697/1999 (reaffirmed 2004).

6. GENERAL TECHNICAL REQUIREMENT

1 TYPE AMR Compatible Static, 3 Ph, 4 Wire Tri-Vector

Energy Meter (Export/Import type for Boundary/ring

fencing/interface HT meters) & (Import type for DTR

and consumer LT meters)

2 FREQUENCY 50 Hz ±5%

3 ACCURACY

CLASS

0.5S

4 SECONDARY

VOLTAGE

Suitable for operation from 110V Ph-Ph or 63.5V Ph-

N (for HT) & 3 x 415V for DTR meters (LT)

5 BASIC CURRENT

(Ib)

-/1 Amps and/or -/5 Amps. as per requirement

specified

6 MAXIMUM

CONTINUOUS

CURRENT

2.0 Ib; Starting and Short time current shall be as per

IS-14697

7 POWER

CONSUMPTION

i) The active and apparent power consumption, in each voltage

circuit, at reference voltage, reference temperature and

reference frequency shall not exceed 1. 5 W and 8 VA.

ii) The apparent power taken by each current circuit, at basic

current, reference frequency and reference temperature shall

not exceed 1.0 VA

8 POWER FACTOR 0.0 Lag -Unity- 0.0 Lead

9 DESIGN Meter shall be designed with application specific

integrated circuit (asic) or micro controller; shall have

no moving part; electronic components shall be

assembled on printed circuit board using surface

mounting technology; factory calibration using high

accuracy (0.05 class) software based test bench.

Assembly of electronic components shall be as per

74

ANSI/IPC-A-610 standard.

10 Communication

port

Companion Specification for IEC 62056 series of

standards, DLMS/COSEM

7. GENERAL ELECTRICAL REQUIREMENT

7.1 STARTING CURRENT The meter shall start and continue to register at the current 0.1% of Ib.

7.2 RUNNING WITH NO LOAD

When the 115% of rated voltage is applied with no current flowing in the current circuit, the meters shall not register any energy and test output of the meter shall not be more than one pulse/count on "no load".

7.3 POWER SUPPLY VARIATION

The extreme power supply variation (which an operating meter should withstand without damage and without degradation of its meteorological characteristics when it is subsequently operated under its operating conditions) is as follows.

Voltage : 70% to 120 % of Vref Frequency : 45 Hz to 55 Hz

The manufacturer can also offer meters, which can withstand higher variations.

7.4 ACCURACY

The class of accuracy of the meter shall be 0.5S.. The accuracy should not drift with time.

7.5 POWER CONSUMPTION

The active and apparent power consumption in each voltage circuit of the CT PT Operated meters at reference voltage; temperature and frequency shall not exceed 1.5 W and 8 VA per phase respectively.

The apparent power consumption in each current circuit for the CT PT Operated meters at basic current, reference frequency and reference temperature shall not exceed 1.0 VA per phase.

8. PERFORMANCE UNDER INFLUENCE QUANTITIES

The meters performance under influence quantities shall be governed by IS 14697-1999

(reaffirmed 2004). The meter should be designed and protected such that all external effects and influences shall not change its performance & shall work satisfactorily within guaranteed accuracy limits, as specified in IS 14697(latest version).

9. MANUFACTURING PROCESS, ASSEMBLY AND TESTING

75

Meters shall be manufactured using latest and ‘state of the art’ technology and methods prevalent in electronics industry. The meter shall be made from high accuracy and reliable surface mount technology (SMT) components. All inward flow of major components and sub assembly parts (CT, PT, RTCs/Crystal, LCDs, LEDs, power circuit electronic components etc.) shall have batch and source identification. Multilayer ‘PCB’ assembly with ‘PTH’ (Plated through Hole) using surface mounted component shall have adequate track clearance for power circuits. SMT component shall be assembled using automatic ‘pick-and-place’ machines, Reflow Soldering oven, for stabilized setting of the components on ‘PCB’. For soldered PCBs, cleaning and washing of cards, after wave soldering process is to be carried out as a standard practice. Assembly line of the manufacturing system shall have provision for testing of sub-assembled cards. Manual placing of components and soldering, to be minimized to items, which cannot be handled by automatic machine. Handling of ‘PCB’ with ICs/C-MOS components, to be restricted to bare minimum and precautions to prevent ‘ESD’ failure to be provided. Complete assembled and soldered PCB should undergo functional testing using computerized Automatic Test Equipment. Fully assembled and finished meter shall under go ‘burn-in’ test process for 24 Hours at 55 degree Celsius (Max. temperature to not exceed 60 degree Celsius) under base current (Ib) load condition. Test points should be provided to check the performance of each block/stage of the meter circuitry. RTC shall be synchronized with NPL time at the time of manufacture. Meters testing at intermediate and final stage shall be carried out with testing instruments, duly calibrated with reference standard, with traceability of source and date. 10. GENERAL & CONSTRUCTIONAL REQUIREMENTS The case, winding, voltage circuit, sealing arrangements, registers, terminal block, terminal cover & name plate etc, shall be in accordance with the relevant standards. The meter should be compact & reliable in design, easy to transport & immune to vibration & shock involved in the transportation & handling. The construction of the meter should ensure consistence performance under all conditions especially during storms/heavy rains/very hot weathers. The insulating materials used in the meter should be non-hygroscopic, non-ageing & have tested quality. The meter should be sealed in such a way that the internal parts of the meter become inaccessible. 10.1. Meters shall be designed and constructed in such a way so as to avoid causing any

danger during use and under normal conditions. However, the following should be ensured.

a) Personal safety against electric shock b) Personal safety against effects of excessive temperature. c) Protection against spread of fire d) Protection against penetration of solid objects, dust & water e) Protection against fraud f) Protection against pilferage g) Meter base and cover shall be joined with ultrasonic welding in addition to use of

directional screws.

76

10.2 The meter should be housed in a safe, high grade engineering plastic / polycarbonate casing, which is of projection mounting type and is dust/moisture proof, conforming to IP-51 & IP 55 of BIS 12063 / IEC 529, vermin proof and sturdy. (For LT CT Operated meter only)

10.3 All insulating material used in the construction of meters shall be non-hygroscopic,

non-ageing and of tested quality. All parts that are likely to develop corrosion shall be effectively protected against corrosion during operating life by providing suitable protective coating.

10.4 The meter shall be supplied with a transparent extended terminal block cover (ETBC). The meter base, meter cover, terminal block and ETBC shall be made of unbreakable high grade fire resistant non-flammable reinforced, polycarbonate (not bakelite) or equivalent high grade engineering plastic, which should form an extension of meter cases and have terminal holes and shall be of sufficient size to accommodate insulation of the conductors, meeting the requirement of IS 14697.1999 / CBIP.88.

The extended terminal block cover should be separately sealable at two places and housed at the bottom of the meters and once sealed should prevent unauthorized tampering. The terminal block should have sufficient insulating properties, mechanical strength and should have house plated solid brass/steel terminals with two fixing screws per terminal. The terminals should be designed to withstand high overload with cage clamp.

10.5 The meter shall have an operation indication device such as a blinking LED. The

operation indicator shall be visible from the front window and capable of being monitored conveniently with suitable testing equipment.

10.6 The meter-base, meter cover, terminal block and ETBC shall be made of unbreakable, high grade, fire resistant, reinforced, non-flammable, polycarbonate or equivalent high grade and good quality engineering plastic certified by CIPET

10.7 The meter cover shall have one window. The window shall be of transparent, high-

grade engineering plastic certified by CIPET for easily reading all the displayed values/parameters, nameplate details and observation of operation indicator. The window shall be ultrasonically welded with the meter cover such that it cannot be removed undamaged without breaking the meter cover seals.

10.8 The terminal block, the ETBC and the meter case shall ensure reasonable safety

against the spread of fire. They should not be ignited by thermal overload of live parts in contact with them.

10.9 The meter shall have tin plated brass/steel terminals with cage clamp design. The

terminals shall have suitable construction with barriers and cover to provide firm and safe connection of current and voltage leads of stranded copper conductors or copper reducer type terminal ends (thimbles).

10.10 The manner of fixing the conductors to the terminal block shall ensure adequate and

durable contact such that there is no risk of loosening or undue heating. Screw connections transmitting contact force and screw fixing which may be loosened and

77

tightened several times during the life of the meter shall be such that the risk of corrosion resulting from contact with any other metal part is minimized. Electrical connections shall be so designed that contact pressure is not transmitted through insulating material. The internal diameter of the terminal holes shall be 5.5 mm minimum. The clearance and creepage distance shall conform to relevant clause of IS 14697:1999/CBIP technical report No.88. 10.11 The entire and construction shall be capable of withstanding stresses likely to occur in actual service and rough handling during transportation. The meter shall be convenient to transport and immune to shock and vibration during transportation and handling.

10.12 Bidder will submit predefined copies (Qty. indicated in Bid Proposal Sheets) of all the software’s (meter reading software for HHU/CMRI, Base computer software for meter data analysis and technical details).

10.13 It should be possible to check the healthiness of phase voltages by displaying all the voltages on the meter display.

10.14 The meter shall have three fixing holes, one at the top and two at the bottom. The top hole shall be provided with a special clip at the back of the meter so that holding screw is not accessible to the consumer after fixing the meters. The lower fixing screws shall be provided under the sealed terminal cover. The requisite fixing screws shall be supplied with each meter.

11. TROPICAL TREATMENT All parts, which are subject to corrosion under normal working conditions, shall be protected effectively. Any protective coating shall not be liable to damage by ordinary handling or damage due to exposure to air, under normal working conditions. Meters shall withstand solar radiation. The meters shall be suitably designed and treated for normal life & satisfactory operation under the hot and hazardous tropical climatic conditions as specified in clause no. 2. The meter shall work from -10°C to +55°C and RH 95% non-condensing type. 12. QUALITY Overall the quality of the meter should be good and the service life of the meter shall be more than the guarantee period. The material, components used for manufacturing the meter shall be of premium quality. The LCD display shall not fade with time and the display annunciators should be visible. Functionality of the meter shall not be affected by the harsh environmental conditions. Quality meters shall be given preference and the performance of previous installed meters shall be analyzed before awarding the tender. Aesthetically, the meter shall be of premium quality.

13. PERFORMANCE GUARANTEE

The meter shall have a design to operate satisfactory for 10 years under normal electrical condition and guaranteed life of 60 months from the date of commissioning against manufacturing and design defects. The meters found defective with in guaranteed period should be replaced/repaired by supplier free of cost with in one month of intimation.

78

14. SEALING OF METER Reliable sealing arrangement should be provided to make the meter tamper proof and avoid fiddling or tampering by unauthorized persons. For this, at least two no. of seals on meter body, two no. of seals on meter terminal cover and one no. of seal on communication port shall be provided. All the seals shall be provided in front side only. Please refer technical specification for specification for sealing system.

15. MARKING OF METERS

The marking of meters shall be in accordance with IS: 14697 /1999 (reaffirmed 2004). Every meter shall have nameplate beneath the meter cover such that the nameplate cannot be accessed without opening the meter cover and without breaking the seals of the meter cover and the nameplate shall be marked distinctly and indelibly. The basic marking on the meter nameplate shall be as follows:

a) R-APDRP Project (Details to be given later)

b) Manufacturer’s name & trade mark

c) Type Designation

d) No. of phases & wires

e) Serial number

f) Month and Year of manufacture

g) Reference Voltage

h) Rated secondary Current of CT

i) Reference Standard: IS 14697

j) Principal unit(s) of measurement

k) Meter Constant ( imp/kwh, kvARh,KVAh)

l) Class index of meter

m) “Property of “APDCL”

n) Purchase Order No. & Date

o) Guarantee period

The meter shall also store name plate details as given in the table A5.1 of annexure of the guideline document. These shall be readable as a profile as and when required. 16. CONNECTION DIAGRAM The connection diagram of the meter shall be clearly shown for 3 phase 4 wire system & 3phase 3 wire system, on inside portion of the terminal cover. The meter terminals shall also be marked and this marking should appear in the above diagram. 17. COMMUNICATION CAPABILITY The meter shall be provided with two ports for communication of the measured/collected data as per the guideline document for DLMS/COSEM energy meters:

79

a) LOCAL COMMUNICATION PORT

The energy meter shall have a galvanically isolated optical communication port located in front of the meter and complying with the hardware specifications detailed in IEC-62056-21 for data transfer to or from a hand held DLMS compliant Data Collection Device (Common Meter Reading Instrument, Hand Held Units etc.) with proper security and without error. b) REMOTE COMMUNICATION PORT Meter shall have an additional communication port (RS 232/485) for periodic data transfer by remote access through suitable modem (GPRS/GSM/EDGE/CDMA/PSTN/LPR). Meter shall operate on open DLMS protocol and will be individually addressable. Meters with similar kind of RS 485 ports shall be possible to hook up in multi-drop arrangement for exporting data to the remote end server through suitable communication medium. Both ports shall support the default and minimum baud rate of 9600 bps.

18. DATA COLLECTION DEVICE To enable local reading of meters data a DLMS compliant data collection device (HHU, CMRI, Laptop etc;) shall be used. This device shall be as per specification given in the guideline document. It shall be compatible to the DLMS compliant energy meters that are to be procured /supplied on the basis of this specification. This device shall be supplied by the meter manufacturer along with the meter free of cost (one unit per 100 meters). 19. QUANTITIES TO BE MEASURED AND DISPLAYED The meter shall be capable of measuring and displaying the following electrical quantities within specified accuracy limits for poly-phase balanced or unbalanced loads:

a) Instantaneous Parameters such as phase and line voltages, currents, power factors, overall kVA, kW, kVAr, power factor, frequency etc as per details given in the table below and the guideline document annexure.

b) Block Load Profile Parameters such as kVAh, kWh, kVArh (lag, lead), Maximum Demand (MD) in kW & kVA, power factor, phase and line voltages, currents etc as per details given in the table below and the guideline document annexure.

c) Daily Load Profile Parameters such as cumulative energy kWh (import, export), cumulative kVAh (while kW- import/export), cumulative energy kVArh (quadrant-1/2/3/4), reactive energy high (V>103%)/low (V<97%), etc as per details given in the table below and the guideline document annexure.

In addition to above the meter shall also record the Name plate details, programmable parameters (readable as profile), occurrence and restoration of tamper events along with the parameters (Table A5.1,A 5.2 andA 6.1 toA 6.8 respectively of guideline document). Detail of category wise parameters requirement suitable for specific location such as feeder/DT metering, interface points/boundary points is given in following tables :

80

Category Parameter group GUIDELINE DOCUMENT - Indian Companion Specification -Annexe Instantaneous parameters A2.1 Substation Feeder/ Distribution

Transformer meter Block Load Profile parameters A2.2 Instantaneous parameters A3.1 Block Load Profile parameters A3.2

Boundary/Ring fencing/Interface Meters

Daily Load Profile parameters A3.3 Instantaneous parameters A4.1 Block Load Profile parameters A4.2

HT Consumer Meters

Billing Profile parameters A4.3 Name Plate details A5.1 Programmable Parameters A5.2

Substation Feeder/ Distribution Transformer/Boundary/Ring fencing/Interface/HT Consumer Meters

Event Conditions A6.1 to A6.7

Logging parameters for each of the event condition – shall be

Capture parameters for event as applicable (Event Log

A6.8

The OBIS code for each parameter shall be as identified as per DLMS /COSEM protocol/ Indian companion standard. Note:-

(a) Demand Integration period shall be selectable between 15/30 minutes,

20. DISPLAY OF MEASURED VALUE The measured value(s) shall be displayed on seven segments, seven digit (with ± indication), parameter

identifier, backlit Liquid Crystal Display (LCD) display unit/register, having minimum character height of 10 mm,

wide viewing angle. LCD shall be suitable for temperature withstand of 70 degree centigrade.

The data should be stored in non-volatile memory. The non-volatile memory should retain data for a period of

not less than 10 years under unpowered condition. Battery back-up memory will not be considered as NVM.

The meter should have facility of auto display mode where all parameters automatically scroll within the

specified time and a manual mode where the parameters can be read by push button operation. In auto display

mode each parameter shall on display for 10 seconds. The display “off” period between two cycles shall not

exceed 30 seconds. The register should not roll over in between this duration.

It should be possible to easily identify the single or multiple displayed parameters through symbols/legend on

the meter display itself or through display annunciators.

Meter shall have Scroll Lock facility to display any one desired parameter continuously from display parameters.

The register shall be able to record and display starting from zero, for a minimum of 1500 hours, the energy

corresponding to rated maximum current at reference voltage and unity power factor. The register should not

roll over in between this duration.

The principle unit for the measured values shall be Wh/kWh/MWh for active energy, VArh/kVArh/MVArh for reactive energy & VAh/kVAh/MVAh for apparent energy. Bidder shall mention the scale in which the meter displays the energy values.

81

There should also be a provision through the push button mode to access a high resolution display of the principle unit of measurement for testing purpose. This high resolution display should provide for displaying the measured units up to 4 decimal point without any rounding off the digits in case of power failure. 21. DISPLAY PARAMETERS & DISPLAY SEQUENCE

a) Consumer Meters The meter shall display the following required parameters in two different modes as follows: A) Auto-Display Parameters for CT operated Static Meters:-

1. LED/LCD test

2. Date

3. Real Time

4. Cumulative Reset Count

5. Phase to Neutral Voltages (R,Y,B) :

6. Line Currents(R,Y,B). :

7. Bill point Active Energy (Kwh) : History 1

8. Bill Point Average Power Factor : History 1

9. Bill Point Power-on-hours : History 1

10. Bill Point Tamper Count : History 1

11. Bill Point TOD Active Energy (Kwh - REG 1,2,3) : History 1

12. Bill Point TOD Maximum Demand (KVA - REG 1,2,3) : History 1

13. Instantaneous Average Power Factor

14. Cumulative Current Active Energy (Kwh)

15. Instantaneous Load (KW)

16. Indication of any present occurrence of tamper (i.e. existing tamper)

B) Push Button-Display (with back scroll facility) Parameters for CT operated Static

Meters:-

1. LED/LCD test

2. Date

3. Real Time

4. Rising Demand (KVA) with elapsed time

5. Phase to Neutral Voltages (R,Y,B)

6. Line Currents (R,Y,B) :

7. Supply Frequency

8. Instantaneous Power Factor

9. Instantaneous Load, Active, Reactive, Apparent

10. Cumulative Reset Count

11. Bill Point Active Energy (Kwh) : History 1

12. Bill Point Apparent Energy (Kvah): History 1

13. Bill Point Average Power Factor : History 1

14. Bill Point Power-on-hours : History 1

15. Bill Point Tamper Count : History 1

16. Bill Point TOD Active Energy (Kwh - REG 1,2,3) : History 1

17. Bill Point TOD Apparent Energy (Kvah REG 1,2,3) : History 1

18. Bill Point TOD Maximum Demand (KVA - REG 1,2,3) : History 1

19. Cumulative Power-on-hours

82

20. Cumulative Maximum Demand (KVA 0-24 HRS)

21. Cumulative Current Active Energy (Kwh)

22. Cumulative Current Reactive Lag Energy (Kvarh-Lag)

23. Cumulative Current Reactive Lead Energy (Kvarh-Lead)

24. Cumulative Current Apparent Energy (Kvah)

25. Cumulative Current TOD Active Energy (Kwh - REG 1,2,3)

26. Cumulative Current TOD Apparent Energy (Kvah REG 1,2,3)

27. Current TOD Maximum Demand (KVA - REG 1,2,3)

28. Indication of any existing Tamper

29. Cumulative tamper occurrence counts

30. Tamper information as mentioned in the relevant clauses of the specification should be

recorded and displayed in the push button display

31 Connection Check.

C) One high resolution display for Kwh & Kvarh suitable for easy dial testing of the meter.

Data Transfer through HHU/CMRI/AMR/LAPTOP: Apart from the display parameters

(Auto display & Push Button) as specified above and the standard parameters as specified in

the relevant clause of the guideline document, the meter should record in addition the

following parameters and all these parameters as well as the displayed parameters should be

retrievable/Calculable at the BCS end through CMRI/HHU:

1. Bill Point TOD Reactive Energies (Kvarh) Lag & Lead

2. Current TOD Reactive Energies (Kvarh) Lag & Lead

3. Current Maximum Demand (KVA) ( 0 –24 HRS)

4. Instantaneous power factors of individual phases

5. Bill Point Power factors of individual phases

6. Detail Tamper information

7. Detail historical data of all the parameters for at least 6 calendar months

8. Information regarding following failures:

a) Time & Calendar

b) RTC battery

c) Segment failure. d) Self diagnostic details e) Battery bad flag

b) Ring Fencing/Boundary/Interface Meters

The standard parameters as specified in the relevant clause of the guideline document shall be displayed in the auto display mode. Additional parameters if required for the push button mode and BCS mode will be notified in due course prior to ordering. c) Sub-station feeder and DTR meters The standard parameters as specified in the relevant clause of the guideline document shall be displayed in the auto display mode. Additional parameters if required for the push button mode and BCS mode will be notified in due course prior to ordering. However in addition to the daily accounting data, monthly or other periodic figures should also be available.

22. CALIBRATION & TEST OUTPUT

83

All the meters shall be tested, calibrated and sealed at works before dispatch. Further, no modification of calibration shall be possible at site by any means. However, it shall be possible to check the accuracy of energy measurement of the meter while in operation in the field by means of LED test output on meter, accessible from the front as well as through high-resolution display using suitable test equipment. Resolution of the test output shall be sufficient to enable the starting current test in less than 10 minutes. Test output device shall be provided in the form of preferably one common LED for KWh, KVARh and KVAh with provision of selecting the parameter being tested. The test output device should have constant pulse rate in terms of pulse/unit energy. 23. REAL TIME INTERNAL CLOCK (RTC)

RTC shall be pre-programmed for 30 Years day/date without any necessity for correction. The maximum drift shall not exceed +/- 180 Seconds per year. The uncertainty of setting initial time shall not exceed + 30 Seconds with respect to Indian standard time (Ref. NPL New Delhi).

The clock day/date setting and synchronization shall only be possible through password/Key code command from one of the following:

a) Hand Held Unit (HHU) or Meter testing work bench and this shall need password enabling for meter;

b) From remote server through suitable communication network or Sub-station data logger ‘PC’

. 24. DEMAND INTEGRATION & MD REGISTRATION The meter shall continuously monitor and calculate maximum demand for each interval of time, which may be programmable as a block of 15 minutes or 30 minutes as per the user’s choice through the communicating ports as and when required with proper password identification & authentication. At the end of every demand integration period the new calculated MD shall be compared with the previous MD and meter shall store whichever value is higher with date & time stamping. Under the current integration period, the rising demand should be displayed continuously along with the elapsed time. The rising demand with the elapsed time should be held in the memory in the event of interruption or switching off supply and it should not become zero on such instances. The registered demand and the number of times the MD is reset shall also be displayed and the information stored. The display of Maximum demand should be as per the provision G-6 of IS 14697 : 1999 25. MD RESET It should also be possible to reset the MD using options. The meter shall have any of the following MD resetting options:

(a) Automatic reset at the end of a certain predefined period by default (24:00 hrs of the last day of the month).

84

(b) Resetting through a hand held terminal capable of communicating with the meter (i.e. through HHU with proper password identification & authentication).

(c) Communication driven reset form the base terminal/server with proper password

identification and authentication.

Note:- It should not be possible to reset the MD by the use of the local push button.

26. ELECTROMAGNETIC COMPATIBILITY The static energy meters shall conform to requirements listed in relevant standards and shall also be protected against radiated interference from either magnetic or radio-frequency source.

a. IMMUNITY TO ELECTROMAGNETIC DISTURBANCE

The meter shall be designed in such a way that conducted or radiated electromagnetic disturbance as well as electrostatic discharge do not damage or substantially influence the meter and meter shall work satisfactorily under these conditions as per relevant standards

NOTE: the disturbances to be considered are: - (a) Harmonics (b) Voltage dips and short interruptions (c) Conducted transients (d) D.C. and A.C. magnetic fields (e) Electromagnetic HF fields (f) Electrostatic discharges (ESD)

b. RADIO INTERFERENCE SUPPRESSIONS

The meter shall not generate noise, which could interfere with other equipment, and meter shall work satisfactorily as per relevant standards

27. TAMPER & FRAUD MONITORING FEATURES

The meter shall work satisfactorily under presence of various influencing conditions like External Magnetic Field, Electromagnetic Field, Radio Frequency Interference, Vibrations, harmonic Distortion, Voltage/Frequency Fluctuations, and electromagnetic High Frequency Fields etc. The meter shall be immune to abnormal voltage/frequency generating devices and shall record the occurrence and restoration of such tamper events along with parameters such as current, voltages, kWh, power factor, event code, date & time etc. (listed in Table A6.1 to A6.8 in the guideline document).

Tamper details shall be stored in internal memory for retrieval by authorized personnel through either of the following:

i) HHU. ii) Remote access through suitable communication network.

85

Minimum 250 numbers of events (occurrences & restoration with date & time) should be available in the meter memory. The meter shall function properly under following common abnormal conditions:

1. Phase sequence reversal

The meter shall keep working accurately irrespective of the phase sequence of the supply.

2. Missing Neutral

The meter shall continue to record accurately according to electrical connections even if the Neutral of potential supply is accidentally or incidentally disconnected.

3. Current reversal / CT polarity reversal

The meter shall log energy in forward direction even if the current is flowing in reverse direction in one or more phases. The meter shall also be capable of detecting and recording occurrence and restoration with date and time if the current is flowing in reverse direction in one or more phases.

4. External magnetic influence

The metering system shall be provided with adequate magnetic shielding so that any external magnetic field (AC Electro Magnet or DC Magnet) as per the values specified in CBIP Technical Report No.88 (with latest amendments) applied on the metering system shall not affect the proper functioning and recording of energy as per error limits prescribed by CBIP.

Beside this the meter should have features to detect the occurrence and restoration of, at least, the following common abnormal events:

a) Missing Potential & Potential imbalance: The meter shall be capable of detecting and recording occurrence and restoration with date and time the cases of Potential failure which could happen due to disconnection of potential leads (one or two), failure of phase line fuse from the Transformer primary side. Meter shall also detect and log cases of voltage unbalance (from 5 % for more than 5 minutes or more- programmable) of voltages.

b) Voltage High / Voltage Low: In case the average 3 phase voltage remains less (below 0.75Vref by default) or more (above 1.15Vref by default) for a predefined period (15 minutes by default), the meter shall log such incidences with date & time. The voltage thresholds & persistence time shall be programmable using the CMRI & BCS. This abnormal condition shall be logged only when all the three-phase voltage is available.

c) Current imbalance: The meter shall be capable of detecting and recording occurrence and restoration with date and time of Current unbalance (30% or more for more than 15 minutes- programmable).

d) Current Circuit Short: The meter shall be capable of detecting and recording occurrences and restoration of shorting of any one or two phases of current circuit to identify events like CT saturation, CT lead shorting, CT inter turns short etc.

86

e) Current Circuit Open: The meter shall be capable of detecting and recording occurrences and restoration of opening of any one or two phases of current circuit which can happen due to intentional / accidental disconnection of current circuits. The meter shall be able to log abnormality conditions in current open event like CT leads burns, loose connection, CT winding open etc in the meter memory. No load condition should not be recorded in meter memory as a Current circuit open event.

f) Power on/off: The meter shall be capable to record power on /off events in the meter memory. All potential failure should be record as power off event.

g) High Neutral Current: The meter shall be capable of recording incidences of excess neutral current (if In is in excess of x % of Ib – programmable) .The limits shall be define by the purchaser during the time of final supply.

h) Over load/ low load Hours: The meter shall be capable of recording the over load / low load hours in KVA in the meter memory. The over loads limit shall be in terms of % of Transformer rating in KVA (programmable using HHU & BCS). The over load limits shall be define by the purchaser during the time of final supply.

i) The meter shall also be capable to withstand and shall not get damaged if phase-to-phase voltage is applied between phases to neutral.

The meter shall record the total duration of the above abnormalities, time and date of their occurrences & restorations with a snap shot of electrical conditions viz. Voltage, current, kwh energy, PF etc.

Logic for calculation of voltage and current imbalance shall be furnished by the tenderer.

The meter shall keep records for the minimum last 250 events (occurrence + restoration) for above of abnormal conditions. It shall be possible to retrieve the abnormal event data along with all related snap- shots' data through the meter's optical port or through radio with the help of a hand held unit (HHU) and download the same to the BCS where it shall be available for viewing. All this information shall be made available in simple and easily understandable format.

The above shall be selectable and will be in line with Table A6.8 of GUIDELINE DOCUMENT: Data Exchange for Electricity Meter Reading, Tariff and Load Control – Companion Specification

28. TAMPER LOGIC Properly designed meter event logic should be provided. There shall be separate compartments for logging of potential related event, current related event and power on/off event. The bidder should explain the events details in each compartment under their offer.

The logging of various events in each compartment should be as under:

Once one or more compartments have become full, the last event pertaining to the same compartment will be entered and the earliest (first one)-event should disappear. Thus, in this manner each succeeding event will replace the earliest recorded event, compartment wise. Events of one compartment/category should overwrite the events of their own compartment/category only.

Properly defined meter tamper logic should be provided. The tamper logic should be capable of discriminating the system abnormalities from source side and load side and it should not log/record tamper due to source side abnormalities.

87

There shall be separate compartments for logging of different types of tampers/events as follows:

Compartment No. 1: 40 % of the tamper memory space shall be allocated for the following current related tampers

- CT polarity reversal - CT open circuit - CT short (bypass)

- Current unbalance Compartment No. 2: 35 % of the tamper memory space shall be allocated for potential related tampers including power failure events. Compartment No. 3-7: 25 % of the tamper memory space shall be allocated for other events.

29. BILLING HISTORY & LOAD SURVEY

The meter shall have sufficient non-volatile memory for recording history of energy parameters for minimum last Twelve billing cycles (Bill date shall be 00 hrs of the 1st date of the calendar month by default – programmable) and information should be made available at the BCS end. Load survey parameters, number of days and data set required for different categories will be made known in due course after consultation with the bidders before ordering. It will be based on the guideline document.

These load survey and history data can be retrieved with the help of Meter Reading Instrument on local interrogation or remotely using the remote communication interface.

The above load survey data should be available in the form of bar charts as well as in spreadsheets. The BCS shall have the facility to give complete load survey data both in numeric and graphic form. 30. TOD METERING PROVISIONS

There shall be a provision up to three Time of Day Zones for Energy (active import, reactive lag while active import & apparent import) and Demand (Apparent demand) registers. TOD provision shall however be as per the guideline document with maximum script identifiers (16) for energy and demand for future use. However at present only three time zones will be used : 06:00 Hrs to 17:00 Hrs, 17:00 Hrs to 22:00 Hrs and 22:00 Hrs to 06:00 Hrs. Number and timing of these TOD Zones shall be user programmable with proper security system. 31. HARMONICS MEASUREMENT

88

THD up to 29th Harmonic shall be measurable that is at sampling rate of 3000/sec. The meter should be capable of measuring fundamental energy as well as total energy. Fundamental energy shall be made available on meter-display and the same only shall be used for billing purpose. The total energy shall be logged in the meter memory and be capable of down loading to the BCS through HHU as well as through the remote communication port and be available for analysis at the BCS end. 32. SELF DIAGNOSTIC FEATURE The meter shall be capable of performing complete self-diagnostic check to monitor the circuits for any malfunctioning to ensure integrity of data memory location at all time. The meter shall have indication for unsatisfactory/non-functioning/malfunctioning of the following:

a) Time and date on meter display b) All display segments on meter display c) Real Time Clock (RTC) status in meter reading prints out at BCS end d) Non-volatile Memory (NVM) status in meter reading prints out at BCS end. e) While installing the meter, it should be possible to check the correctness of Current

Transformer, Voltage connections to the meter and their polarity from the functioning of the meter for different voltage injections with the help of vector/phasor diagrams. It should also be possible to check the current and voltage sequence parity. For this purpose suitable software for field diagnosis of meter connections with the help of HHU/Meter Reading Instrument should be supplied.

33. OTHER SALIENT FEATURES OF METERS

a) It should be possible to check the healthiness of phase voltages by displaying all the

voltages on the meter display.

b) The meter must be readable in power off condition. For that a battery back-up of suitable capacity shall be provided. Push button for the normal display shall also be used for battery back-up display in power off condition for the manual mode reading of the auto display parameters. It must be possible to power up the battery by means of an external source or by the HHU itself for reading the meter in power off condition by the HHU. In case of an external source an inductive coupling arrangement shall be provided so that it should not be possible to damage the circuit of the meter by applying excess voltage directly in the meter. It must also be possible to trigger the battery to power up the meter in case of power failure from the remote server for reading the meter from remote location through the communication ports.

c) The meter should work accurately irrespective of phase sequence of the mains supply

d) The meter should remain powered up and functional even when either of the two phases or one phase along with neutral is available to meter.

e) The meter should continue to record accurately as per prevailing electrical conditions even if the neutral of the potential supply gets disconnected.

89

34. TEST AND TEST CONDITIONS

Unless specifically waived off, all tests shall be witnessed by the purchaser. 34.1 Type Test

The Energy meter offered shall be fully type tested at any of the NABL accredited test laboratories as per standards indicated in Clause 5 above. That is the meter offered should have successfully passed all type tests described in the IS 14697 and the meter Data Transfer and Communication capability as per the guideline document.

One (1) out of every one thousand (1000) meters or part thereof shall be subjected to the complete range of type tests after final assembly. In case of any failure to pass all specified tests, the bidder shall arrange to carry out the requisite modifications/replacements in the entire lot of meters at his own cost. After any such modifications and final assembly, two (2) meters selected out of the lot by the Owner's representative shall be subjected to the full range of type tests. The Owner shall accept the lot only after successful type testing.

Further Purchaser shall reserve the right to pick up energy meters at random from the lots offered and get the meter tested at third party lab i.e. CPRI / agencies listed at Appendix-C of CBIP publication No-304 / NPL / CQAL/ ERTL / ERDA at the sole discretion of the Purchaser. The supplier has no right to contest the test results of the third party lab or for additional test and has to replace/take corrective action at the cost of the supplier.

It shall be the responsibility of the supplier to arrange such tests and Purchaser shall be informed of the date and time of conduction of tests well in advance to enable him to witness such tests. Test charges of the testing authority, for such successful repeat type tests, shall be reimbursed at actual by the Purchaser.

The meters used for type testing shall be separately identified, duly marked, and supplied to the Owner in case they are fully functional and as good as other (new) meters, after necessary touching up/refurbishing. In case this is not possible, the bidder shall provide their replacements at no extra cost to Owner.

The Bidder shall arrange all type testing specified above, and bear all

expenses for the same. Type test certificate shall be submitted along with the offer and the same shall not be

more than 36 months old at the time of bid submission. Make & type of major components used in the type-tested meter shall be indicated in the QAP. (However as per the specific guideline of the standard technical specification for R-APDRP project meters the bids for which are to be issued up to Feb 2010, if the type test certificates could not be produced at the time of tendering, the bidder shall have to submit the required type test certificate at the time of meter delivery)

34.2 Acceptance Test

90

All acceptance tests as per relevant standards shall be carried out in the presence of utility representatives. Additional acceptance shall include Surge withstand (SWC) for 6 kVp, as per IEC 62052-11, Lightning impulse test and HF disturbance test as IS 14697. One sample meter per order from one of the offered lot shall be subjected to SWC/other semi-destructive tests. Meters after tests shall not be used.

Accuracy tests shall be performed at the beginning and at the end of the acceptance tests specified.

34.3 Routine Test

All routine tests as specified in table 18 of CBIP Technical Report No. 88 shall be carried out on each individual meter and routine tests certificates shall be submitted for approval of purchaser.

35. QUALITY ASSURANCE:

The manufacturer shall have a comprehensive quality assurance program at all stages of manufacture for ensuring products giving reliable, trouble free performance. Details of the bidder’s quality assurance and test set up shall be furnished with the bid. A detailed quality assurance program shall be finalized with the successful bidder during the award stage. Bidder shall furnish following information along with his bid: i) Organization structure of the manufacturer and his main sub-suppliers (PCBs, SMT

cards, CT/PT) with details of ‘QA’ setup, overall workflow; ii) Copy of system manual showing ‘QAP’ (Quality Assurance Plan) as actually practiced

during manufacturing and final testing. iii) List of raw materials and critical components (ASIC chip, crystal clock, memory

register Chip, transformers, optical ports etc.) with their suppliers; iv) Stage inspection of product before final testing; v) Procedure adopted for ‘In-situ’ testing of PCBs, after placement of surface mounted

component, for quantitative parametric variation of tolerance by self or sub-contractor. vi) Testing and calibration facility, date of calibration of test bench, manpower data of

bench operators; vii) Sample copies of test certificate of bought out components.

36. QUALIFYING REQUIREMENTS

i) Bidder should be a manufacturer; ii) He should have all the facility in his works for design, assembly, quality

assurance, burn-in test (Fully assembled Energy Meter), testing (all routine and acceptance tests), automatic calibration of Energy Meter on software based test bench, qualified team of technical and software engineers;

iii) The average annual turnover of the manufacturer for Energy meters for the three (3) best financial years out of last five (5) years, should be at least Rs.** …………… Lakhs. (** is 2 x Package Cost x 12/ Work completion schedule in Months)

iv) Notwithstanding anything stated herein under, the Purchaser reserves the right to assess the capacity and capability of the bidder to execute the work, should the circumstances warrant such assessment in the overall interest of the Purchaser.

91

37. GUARANTEE

Equipment (Meter) supplied shall be guaranteed for a period of 66 months from the date of supply Bidders shall guarantee to repair or replace the meters and meter boxes and other accessories, which are found to be defective/ inoperative at the time of installation, or become inoperative/ defective during guarantee period. Replacements shall be effected within 1 month from the date of intimation. The bidder shall extend the guarantee of 5 years. However the backup bank guarantee provided by the bidders shall be valid for 2 years only.

38. FIXING & CONNECTION ARRANGEMENT

Manufacturer shall ensure following technical points:

i) Meter shall be suitable for mounting on Simplex type vertical panel with front door; CAT-M4 disconnecting type TBs to be used for Current circuit; Panel wiring to be properly dressed and harnessed; External cables to enter panel from bottom gland plate using double compression glands.(For sub station panel meters only)

. ii) Energy Meter terminals block shall be adequately sized with regard to maximum

conductor dimension, commensurate with current rating of Energy Meter.

39. SOFTWARE

a) Licensed copies of the relevant software shall be made available for installation on each Hand Held Unit (HHU) /Common Meter Reading Instrument (CMRI) and Base computer software (BCS) for installation on the server and other terminals by the supplier.

HHU/Common Meter Reading Instrument (CMRI) would be loaded with user-friendly software (windows based) for reading, downloading meter data and relevant programming transaction in the meter with proper security system.

b) Windows based user interactive Base Computer Software (BCS) shall have to be supplied for

efficient and speedy recovery of data from HHU/CMRI/Meter(by remote communication) and downloading instructions from base computer software to HHU/CMRI/Meter(by remote communication). This BCS should have, amongst other requirements, features and facilities to communicate, download and display meter data as described in the “Guideline document – Data Exchange for Electricity Meter Reading, Tariff and Load Control (Companion Specification for IEC 62056 series of Standards)” from DLMS/COSEM meters. The BCS should also have facility to convert meter reading data into user definable DBF (Access) and spreadsheet format for integrating with the purchaser's billing system. Here again an "Export wizard" or similar utility shall be available whereby user can select file format, the variable data to export, the field width selection of each variable so that it may be possible for the user to integrate the same with the user’s billing data and process the selected data in desired manner. The BCS shall also allow for viewing and easy analysis of the meter data acquired and for exporting that data in ASCII or CSV format. It should have in general the following features: i) It shall allow collecting of meter data on direct communication with the meter through wires as well as

through remote system. ii) It shall be possible to view the meter data and details in user friendly manner (Windows Based Platform).

92

iii) New users with their level of access rights could be defined and managed by supervisors based upon their usage requirement.

iv) It shall be possible to maintain a meter information database, to add, edit, delete meters from the meter information database with proper authentication. The meter information database shall have amongst others the information relating to meter serial no, meter location, meter status, CT, PT ratios, KVA ratings etc.

v) BCS must have provision to manage users and roles. It shall be possible to create a user and assign him privileges to perform specific types of operation according to the “Role” assigned to him. It shall be possible to define a role and link it with “Rights” of using different options. If rights are not assigned for a particular option, a “User” with that “Role” shall have no right to use or view that option.

vi) The software must have the user friendly GUI and User Interface should be customisable by the user. It shall be possible for a user to a) Display or hide a column in the Meter List Pane b) Change the column width c) Activate & apply column wise filter for displayed list d) Sort the order of the displayed list. The sorting can be enabled on any of the displayed field / column e) Group the meter list according to a field displayed in a column and then further sub-group the list

according to another field

The software’s shall have the flexibility to generate at least the following sets of reports amongst others

• Energy Accounting reports • Billing Point reports • Load survey reports • Tamper information reports

Billing reports to include customer ID, Name & Address, connected Load, meter status, billing cycle,

historical meter reading, date and time, current meter reading, date and time, Maximum Demand, date and time of Maximum Demand occurrence.

Load survey report for a pre determined time i.e. from ________ date to ___________ date, to include

the following.

Customer ID, meter number, Consumer Connectivity references i.e. identity & location of pole / Distribution transformer reference, feeder reference, sub-division reference, division reference, circle reference, time, date, maximum demand (kW),KVAR, kWh, power factor, kVAh, MD reset count, power on hours, outage duration, number of outages, Voltages max R, Y, B date time and duration, Voltages minimum R, Y, B date time and duration, load factor as (energy consumed/(maximum demand x power on hours)), average load as (energy consumed / power on hours), TOD max DEMAND and duration, Average current phase wise. The load survey data should be available in the form of bar charts as well as in spreadsheets. The BCS shall have the facility to give complete load survey data both in numeric and graphic form. The exact parameters set and the period for the load survey report for each category of meters will be specified in due course after consultation with the bidders prior to ordering

Tamper reports to include for a pre determined duration or month wise, tamper count, tamper duration and tamper history for each of the meters.

Vendor will provide soft copy of all the software in CD form along with the meters supplied.

Vendor to install & demonstrate working of software programmes on the HHU/CMRI’s of ASEB

93

c) Base computer station software for accepting data from hand held unit/CMRI/ for Processing, generating reports and downloading instructions from the BCS to HHU/CMRI for onward transmission to DLMS/COSEM meters of specific makes, This may include meters of other leading makes.

d) Dial-up software for accepting data from the meter by remote communication means to the BCS,

processing data, & generating reports.

SOFTWARE SECURITY The BCS shall have multilevel password for data protection and security. The first level shall allow the user to enter the system. The different software features shall be protected by different passwords. The configurable of passwords shall be user definable. The software installed on one PC shall not be copied on another PC without additional security. HELP SYSTEM Exhaustive online & offline help shall be an integral part of the software so that user can use all the features of the software by pulling down the help contents from the user friendly menus for any references.

40. DATA SECURITY

In addition to the basic security, selective advanced security with encryption and authentication by the use of NIST SP 800-38D as specified in the companion standard guideline document must be provided for. The security system must be adequate enough not to allow data manipulation at any stage. The system should be able to achieve security through authenticated transaction on the HHU/CMRI form the back office software only.

94

10. TECHNICAL SPECIFICATION OF 33 KV THREE PHASE FOUR WIRE,THREE CTs COMBINED METERING CTPT SET OF ACCURACY CLASS 0.5s

IMPORTANT NOTES:

1.0 Supplier should submit their offer in Annexure – I and I-A & I-B only.

2.0 No offer will be considered if it submitted other than above Annexure – I, I-A, and I-B in case of 11 KV.

3.0 Annexure – I is as per APDCL’s requirement. If there is any deviation in APDCL’s requirement, same should be brought out in Annexure: I-B only with detailed reason. If no deviation, then also put this Annexure :I-B with tender indicating no division.

4.0 Though Annexure: I–A is design parameters, supplier has to submit compulsorily for our reference.

5.0 No subsequent correspondence or any submissions made after opening of Technical Bid will be entertained. The offer will be disqualified if, any such attempt is made by the bidder.

SPECIFICATION FOR 11 KV COPPER WOUND MEASURING THREE PHASE THREE CTs AND ONE

THREE PHASE STAR/STAR PT COMBINED C.T.P.T. UNIT.

1.1.0 SCOPE:

This specification covers design, manufacture, testing at manufacture’s works and inspection, supply and delivery of oil filled conventional type outdoor type pole mounted combined 11 KV copper wound CTPT unit.

The combined CTPT unit shall comprise of three single phase Current Transformers and 1(one) Three phase voltage transformers having primary star point of primary winding shall not be EARTHED (i.e. floating neutral and secondary star neutral points shall not be EARTHED on LV side and shall be brought out on secondary terminal Box.

1.2.0 OPERATIVE CONDITION:

The CTPT units to be supplied against this specification shall be suitable for satisfactory continuous operations under the following tropical conditions.

1.2.1. AMBIENT CONDITIONS:

a) Maximum ambient air temperature not exceeding: 500C b) Maximum daily average ambient air temperature not exceeding: 350C c) Maximum yearly average ambient air temperature not exceeding: 300C

1.2.2. ALTITUDE: Upto 1000 meters above Mean Sea Level.

1.2.3. INSTALLATION:

Outdoor poles mounted in atmosphere normally get polluted. The CTPT units shall also function satisfactory if installed in Sea Shore area having saline atmosphere and in chemically polluted areas.

1.2.4. SYSTEM:

95

3 Phase, Frequency 50 Hz + 10% Voltage = 33 KV Highest system voltage: 36 KV

It is also pertinent to state that commonly the system may be contained of various type and order of Harmonics generated by consumers. In view of which adequate care shall be taken in design and manufacturing of unit. The remedial measures taken or proposed to be taken shall be intimated in detail with technical write up.

1.3.0 APPLICABLE STANDARDS:

Unless otherwise specifically stated in this specifications of CT-PT Units shall conform latest version to the following standards :

IS-2705 Current transformers IS-3156 Voltage transformers IS-5621 Hollow porcelain isolator or bushing IS-3347 Dimensions for bushings IS-335 New insulation Oil IS-2062 Structural Steel (Std. quality) IS- 5 Colors for ready mix paints IEC-185 Current Transformers IEC-186 Potential Transformers IS-2629 Galvanizing

1.4.0 DATA SHEET

S.N Description CT PT

1 Type Three Single phase One three phase Star/Star

2 Accuracy Class 0.5S 0.5

3 Rated frequency 50 HZ 50 HZ

4 Rated primary current 20,30,50,75,100, 150,200A,

300A N/A

5 Rated secondary current 5Amps N/A

6 Rated primary voltage 33KV/√3

7 Rated secondary voltage 110/√3

8 Rated burden 5 VA at (0.8 lagging PF) 30 VA (0.8 lagging PF)

9 Rated voltage factor 1.5 continuous and 1.9 for

30 sec.

10 Current Density 1.5 A/sq.mm.

96

11 Short circuit current withstand time

16 KA for 1 second

12 Dynamic current 40 KA

13 Power frequency withstand voltage on primary winding

70 KV for one minute 70 KV for one minute

14 Power frequency withstand voltage on secondary winding

3 KV for one minute 3 KV for one minute

15 Lightning Impulse withstand voltage

170 KV 170 KV

16 Winding materials Copper Copper

17 Class insulation A A

18 Instrument Security Factor Less than 2.5

19 Maximum allowable temperature rise

50 0C 50 0C

1.5.0 BUSHING:

a) Brown glazed HV bushing of approved make shall mounted as stated in 4(e) of Annexure-I on top cover of tank. The list of approved suppliers for Porcelain insulators may be obtained from this office. The hollow porcelain bushings shall be confirming to IS-5621. The metal parts of the bushings shall be tinned copper with minimum tinning with 50 micron with spring washer and plain washer (minimum 2.0 mm thick electroplated) with 3 (three) nos. nuts, one lock nut and two nuts for terminal connections

b) Bushing clamping and accessories together with the connected bolts/studs shall be hot dip galvanized. However, nuts and washers shall be SS-304.

c) Arcing horn should be avoided.

d) Suitable bird guard will be required for all HT bushings

1.6.0 TRNASFORMER OIL:

1.6.1. The transformer oil to be supplied in the CTPT tank shall be new oil conforming to requirements as stated in Annexure-II when tested according to IS-335/1983

1.6.2. The current transformer shall be so constructed as to ensure that the oil does not flow or leak out even

when the current transformer is used continuously at the maximum allowable temperature; similarly the potential transformer shall be so constructed as to ensure that the oil does not flow or leak out

97

1.6.3. Oil should be filled up to the top of HT side bushing, hence necessary provision should be made for

expansion of oil due to rise in temperature

1.7.0 TANK:

The tank shall be fabricated from fresh MS Sheet of 5mm, thickness for top cover, flange and bottom of the tank and of 3.0mm thickness for side walls so as to withstand pressure built in during the expansion of oil during temperature rise or forces generated during short circuit. The expose fabricated tank with cover and other ferrous fittings shall be thoroughly cleaned, scrapped process and hot dip galvanized as per relevant IS-2629. All nuts, bolts, washers, screws, etc. exposed to the atmosphere shall be of 304 grade of stainless steel. The curb of the tank shall be minimum 50mm wide. The top cover shall have slope of minimum 10 degree to drain off water in rainy season. The oil resistant gasket of neoprene rubber or nitral or synthetic rubberized cork of minimum 8mm thickness shall be provided. Adequate number of SS-304 grade bolts of M12 x 50mm (length) size bolts at maximum 115mm (with tolerance of mm) C/C apart with 2 mm thick washer of 304 grade SS shall be provided. Four numbers of lifting lugs of 5mm thickness shall be provided on tank sides and two nos. on top cover. The top cover should be fabricated in such a way that nowhere the top cover gasket is exposed to air. Suitable PRV are to be placed on the top cover of the tank to prevent explosion. Note:- No inspection cover on any side / face of the CTPT top or base shall be provided.

1.7.1. TERMINAL BOX:

The terminal box shall be closed box type, water/vermin proof with tinned copper terminals of minimum 6mm dia x 35mm with electroplated spring washers and three numbers nuts. The terminal marking and polarity marking shall be done by etched aluminum square plated duly fixed in irremovable manner. The terminal box shall have cable entry hole to accommodate metallic gland (approx of 1.1/4” size) suitable to termination of 10 core, 2.5 Sq. mm PVC insulated steel armored cable. The terminal box covers shall have the provision of sealing the terminal box for which minimum Four nos. of corner bolts to be fixed on the flange of the box shall be provided with adequate hole on the bottom for sealing purpose. The terminal box with the cover closed and cable in position must have degree of protection conforming to IP-54. The minimum projection of the box shall be 70mm. The Serial number, ratio, and date of dispatch shall have to be ENGRAVED on side (opposite to secondary terminal box), of tank with letter of suitable depth and 25mm height filled with RED color. The fabrication of the CTPT set tank shall be such that there should not be any oil leakage from welded positions. The four numbers corner bolts of top cover shall have suitable hole for inserting sealing wire.

1.8.0 FITTING AND ACCESSORIES:

The following fittings/accessories are to be provided to the CTPT units.

a) Drain plug 19mm (3/4” size) at the bottom of the tank with pad lock. 1 No

b) Oil level Gauge 1 No

c) MS earthing terminals with two nos. nut & bolts and washer with earth symbol

2 Nos

98

d) Rating and terminal marking plate (Etched All) riveted to tank. (The rating plate shall have all details as per IS-2705 and 3156 along with order no. of APDCL and connection diagram).

1 No

e) Lifting lugs of minimum 8mm thick 2 Nos on top

cover and 4 Nos on tank side

f) Base mounting channel MS 150m x 75mm x 6mm 2 Nos

g) Oil filling hole with cap 1 No

h) PRV 1 No

i)

i) HV porcelain bushings of approved make as per Annexure-I. If the supplier wants to use any other make bushing then it should be got approved form APDCL before use and it should be clearly indicated in Annexure-I-B.

ii) LV terminals (Minimum 6mm dia) tinned copper with spring washer, plain washer and nuts with phase and polarity marking etched plated.

iii) 30 mm Double Compression – Flame Proof metallic Gland

iv) Bird guard for HT side bushings

As required

1.9.0 CORE:

1.9.1. CORE MATERILAS:

Non aging oxide film coated fresh suitable Mu-metal or Mu-metal plus CRGO toroidal cores for CT. For lamination of PT first quality laser grade CRGO shall be used as core material. All the stresses developed due to cuttings, punching etc. shall be relieved by suitable stress relieving process.

1.9.2. CORE CONSTRUCTION AND DESIGN:

Core is supporting steel and insulation shall be such that harmful changes in electrical and physical properties shall not occur during the life time of the CTPT unit. Core winding shall be strongly braced so that it shall not get displaced in operation due to shrinkage on short circuit forces. Core assembly shall be rigidly clamped with M.S. Channel and mounted to the tank.

1.9.3. CORE OF PT:

The core of PT shall be effectively earthed by copper braided flexible wire of minimum area of 40 mm2 cross-section. The core shall be rigidly branched with insulated bolts an the assembly shall be rigidly clamped with MS Channels and mounted on the tank.

1.9.4. CORE OF CT:

99

The tenderer shall provide toroidal core only. It should be same as given in type tested unit. Core / Winding assembly of CT shall be rigidly mounted in the tank.

1.10.0 WINDING:

1.10.1. It shall be of electrolytic grade copper conductor with super enameled Insulation, conforming to relevant ISS. The winding design and contraction shall be such that it shall withstand impulse voltage. The details as per Guaranteed Technical Particulars shall be provided. The winding shall be preferable in two sections.

1.10.2. CT WINDING :

It shall be of electrolytic grate copper conductor with DPC/DCC and super enameled insulation conforming relevant ISS. The winding design and construction shall be such that it shall withstand impulse voltage and short circuit currents. The winding shall be provided with rigid insulating supporting hylum sheets of minimum 5 mm thickness on both the sides duly tightened by insulating fasteners only and by cotton cord etc.

a) Each coil shall be wound of paper insulated, continuously, smooth high grade, electric copper conductor.

b) The materials used in the insulation and assembly of the winding shall be in-soluble, non-catalytic and chemically inactive in the transformer oil.

c) Winding assembling shall be dried in vacuum thoroughly shrunk to final alignment and vacuum impregnated with tested transformer oil.

d) Design arrangement, insulated and assembly of the winding on the core shall be so as to ensure uniform distribution of voltage amongst all coils.

1.11.0 CONNCTIONS:

No joints in the primary winding of CT shall be acceptable. The connections to bushing terminals shall be with flexible copper strip / rope of adequate current carrying capacity. The leads shall be properly terminated with a crimped lug only.

1.12.0 ASEMBLY:

Three phase CTPT combined units having specification / construction as referred above shall be rigidly fixed in the tank. The core and coil assembly shall be supported rigidly with suitable M.S. Channels. Suitable guides shall be provided to avoid displacement of active parts. The inner clearance between live parts to tank shall be minimum 100mm for 33 KV CTPT set. The drawings shall clearly indicate the inner clearance in detail. General Arrangement Drawing should be sent with offer for approval.

1.13.0 CABLE DETAILS:

The terminal box shall have cable entry hole of size 38mm dia. with 1.1/4 inch double compression flame proof metal cable glands to avoid cutting of cable sheath. The terminal box shall have provision to seal the terminal box.

1.14.0 CLEARANCE:

The minimum air clearance for HV shall be as per IS-3347.

1.15.0 DRAWINGS:

100

The detailed dimensional drawings – 3copies as listed below shall be furnished along with the offer.

a. Overall General arrangement drawing showing bushings arrangement with their clearance, terminal box, etc. as per design shown with front side and top views along with list of fittings, material and its composition, nos., make and electrical clearance and creep age distance etc.

b. Drawing showing internal exposition of CT’s and PT’s inside tank with cross sectional view of CTs and PT, with dimensions, clearances, mounting arrangement details including details of electric and magnetic circuits.

c. Diagram showing LT terminal arrangement with phase / polarity marking and clearances.

d. Drawing of name plate showing details of CT and PT ratings, wiring diagram with terminal / polarity marking.

1.16.0 TESTING & INSPECTION:

1.16.1. QUALIFICATION:

The tenderer shall have to furnish to following test certificates and documents. i. All type tests certificates as listed under Annexure-III for 33KV carried out on ONE single sample unit

(For 33KV – 3 Single phase CTs having class of accuracy – 0.5S, 05 VA for CT and on three phase PT having Class of accuracy – 0.5, 30 VA for PT and tests must not be carried out more than Three years prior to the date of submission of the tender offer. The above test should be carried out in any Govt. approved Test Lab as indicated above.

ii. The tenderer shall also submit one type test certificate for the test of “Instrument Security Factor” as per the Cl. No. 7.1.2 of IS-2705 (Part-II) conducted on both phase of the CTs for the sample of 20/5 Amp. of 33KV. The value of ISF must be 2.5 or less than 2.5 and the test must have been conducted at any Govt. Testing Lab not prior to more than 3 years from the date of submission of the offer.

iii. The copy / proof of bill / in voice of purchase of core material.

iv. The copy of BH curve for the core material intended to be used in regular supply of CTPT units.

If above test certificates are not submitted the offer will not be considered as “Qualified”.

NOTE: The technical offers of the suppliers submitted along with above Type Test Certificates for Three Phase two CTs combined CTPT unit (with all other technical specifications unchanged) conducted successfully on one single unit with all other rating and specification, i.e. STC, ISF etc. unchanged, will also be considered / accepted for evaluation purpose. However the successful / qualified tenderer shall have to prepare the prototype units as per tender’s requirement and get tested for all tests (as per APDCL’s discretion) at any Govt. Test Lab prescribed by the APDCL and preferably in the presence of APDCL’s officer, within a period on ONE month from the date of LOI, failing to which the order shall be liable to be canceled without payment toward any compensation on account of cancellation of the order by the purchaser.

1.16.1.1. TYPE TEST CERTIFICATE:

On the strength of above qualification, LOI will be placed if offer passed in other requirements. However, before commencement of bulk supply, the supplier has to submit Test Certificates for all the Type Tests as prescribed under Annexure-III for 33KV CTPT sets with ration as specified under 16.1 above i.e. 20/5 Amp. for 33KV class of supply voltage.

All the tests as specified in Annexure-III shall have to be conducted only in the presence to the APDCL’s representative on ONE single Proto / sample unit.

101

The FINAL purchase order OR A/T shall be placed only after successful type testing on Proto units in the presence of APDCL authority.

NOTE: The time limit for above test must be 30 days or whichever approved by APDCL. Also in case even if the tenderer has not offered CTPT units of 20/5 Amp. 33KV class, the tenderer shall have to prepare lowest ratio (20/5 Amp. of 33KV) Proto CTPT unit and get their sample units tested at prescribed Govt. Testing Lab. The consent letter (if the lowest rating CTPT unit is not offered for bulk supply), shall be submitted along with the offer or otherwise the offer shall not be accepted.

The cost of all type testing and its related expenses shall have to be borne by supplier.

1.16.1.2. The APDCL also reserves the right to carry out all or any type tests on any CTPT set from the lot offered for inspection by the firm at CPRI / ERDA or Govt. Recognized Lab. in presence of APDCL officers and representative of firm at APDCL’s cost. Any decision based on this testing shall be applied to the full ordered quantity. However, if the unit fails in test, then the test charges shall have to be borne by the supplier.

1.16.2. ACCEPTANCE TESTS:

The tests shall be carried out at manufacturer’s work as “Acceptance Tests” on all CTPT sets offered for inspections as per applicable is of individual units and this specification as per Annexure-IV.

1.16.3. ROUTINE TESTS:

The firm shall carry out the routine tests on each CTPT set being offered for inspection and submit the routine test certificate to the inspector deputed for inspection of CTPT sets and acceptance of the lot. Routine tests shall be carried out as per Annexure-V.

1.17.0 PROTO TYPE UNITS”

The successful tenderer shall have to prepare minimum 2 nos. of proto type units or ratio as specified under Cl. No: TYPE TEST CERTIFICATE: above, for 33 KV separately conforming to this specification prior to manufacturing of bulk supply. The proto type units shall be subjected to (i) all Acceptance Tests as per clause no. ACCEPTANCE TESTS: of this specification at the firm’s work and (ii) All type tests including the test of ISF on each CT, as per Annexure-III at any Govt. Testing Lab (the name of which shall be decided by APDCL) in the presence of APDCL’s representative.

The testing fees shall have to be borne by the supplier.

NOTE: The TWO Nos. of lower / intended ratio CTPT – Proto Type units are required to be prepared only to continue testing work on second unit at either supplier’s work or Govt. Testing Lab., whichever the case may be, in event of NOT passing through any Type test. However all Type Tests shall have to be conducted successfully on ONE single Proto unit.

The prototype units shall be sealed and kept at firm’s premises. During subsequent inspection of CTPT set, any unit may be opened for comparison with prototype for internal design detail, if required. The prototype unit having passed all Type test / selected tests successfully shall be dispatched along with last lot only.

The detailed drawings as mentioned at clause no. DRAWINGS: of this tender specifications be submitted by the firm along with offer and only after approval of prototype unit and detailed drawings, the firm shall start bulk supply conforming to approved proto type units.

The prototype units shall be dispatched along with last lot only.

102

1.18.0 GUARANTEE:

The combined CTPT set offered shall have guarantee for good design, materials and workmanship. The defective units shall have to be repaired / replaced free of cost if reported 66 months of their receipt at site or 60 months from the date of commissioning of equipments whichever is earlier.

The firm shall be responsible for proper performance of the equipment for 66 months of their receipt at site or 60 months after commissioning whichever is earlier.

Reported failed units under guarantee period as above shall be repaired / replaced as early as possible. In any case, it should be repaired / replaced within 30 days. The failed units are to be collected by the supplier from our field offices within 15 days of reporting. If immediate arrangement for collection of failed unit is not collected and if the units are not repaired within two months time, the APDCL will deduct full cost of CTPT unit from the bill. All the suppliers have to give 10% Performance Bank Guarantee in advance as security deposit.

103

11. TECHNICAL SPECIFICATION FOR CONSTRUCTION WORKS IN SUBSTATIONS

10.1. GENERAL

10.1.1. The intent of this Section of the Specification is to cover requirements which are to be followed in construction of switchyards including civil works in the switchyard.

10.1.2. The work shall be carried out according to the design/drawings to be developed by the Contractor and approved by the Employer based on Drawings supplied to the Contractor by the Employer with this specification. For all structures, foundations, etc., necessary layout and details shall be developed by the Contractor keeping in view the functional requirement of the substation facilities and providing enough space and access for operation, use and maintenance based on the input provided (drawings and design parameters) by the Employer in this Technical Specification. Certain minimum requirements are indicated in this Section for guidance purposes only. However, the Contractor shall quote according to the complete requirements.

10.2. GEO-TECHNICAL INVESTIGATION

10.2.1. The Contractor shall perform a detailed soil investigation to arrive at sufficiently accurate, general as well as specific information about the soil profile and the necessary soil parameters of the Site in order that the foundation of CSS pad and pole structures can be designed and constructed safely and rationally.

10.2.2. A report to the effect will be submitted by the contractor for Owner’s specific approval giving details regarding data proposed to be

10.3. FOUNDATION

10.3.1 All foundation shall be of reinforced cement concrete. The design and construction of RCC structures shall be carried out as per IS: 456 and minimum grade of concrete shall be M-15. Higher grade of concrete than specified above may be used at the discretion of Contractor without any additional financial implication to the Owner.

10.4. EARTHING SYSTEM

General (a) It is responsibility of the Contractor to design, install and test the complete earthing system for

the substation. The design of the earthing system shall be submitted to the Employer for his approval prior to execution of the works.

(b) The main earthing system for the switch yard shall consist of a mesh made out of Galvanised MS flats of size not less than 65 mm in width and10 mm thick covering the entire switchyard area and earth electrodes distributed all over the mesh. The earth electrodes shall also be placed all around the periphery of the mesh at regular intervals.

(c) The earth mat shall be created by laying the earthing conductor (Galvanised MS flats) in both directions perpendicularly. The mesh points so created and all other joints shall be welded and painted and painted with rust proof paint after welding.

(d) Minimum depth of burial of main earthing conductors shall be 600 mm from FGL. (e) The spacing between laid earth conductors shall depend on the soil resistivity. It is responsibility

of the Contractor to take the soil resistivity of soil and to develop the entire earthing system. The earthing system shall be so designed that the step and touch potential are within safe limits. The resistance of the entire earthing system shall be as low as possible and not more than 2 ohms. The symmetrical short circuit current for design of the earthing system shall be taken as 25 KA. The earthing system must also conform to requirements of the Indian Electricity Rules and the provisions of IS: 3043. The development of earthing system along with the design calculations shall be submitted to the Employer for his approval.

104

(f) The all earth electrodes and risers for equipment and other earthing must be connected at mesh points of the earth mat. All such connections shall be welded.

(g) All metallic supporting structures and non-current carrying metallic parts of all equipment shall be provided with double earthing.

(h) All LAs, and all transformer neutrals must be earthed through separate earth electrodes and in turn these electrodes shall be connected to the main earth grid.

(i) Each earthing lead from the neutral of the power transformer shall be directly connected to two pipe electrodes in treated earth pit (as per IS) which in turn, shall be buried in Cement Concrete pit with a cast iron cover hinged to a cast iron frame to have an access to the joints. All accessories associated with transformer like cooling banks, radiators etc. shall be connected to the earthing grid at minimum two points.

Summary of Earthing System

Sl. No. Item Size Materials 1 Main Earthing Conductor to be buried in

ground 65mm x 10 mm GI Flat

2 Conductor above ground & earthing leads (for equipment)

65mm x 10 mm GI Flat

3 Conductor above ground & earthing leads(for columns & aux. structures)

65mm x 12 mm GI Flat

4 Earthing of indoor LT panels, Control panels and outdoor marshalling boxes, MOM boxes, Junction boxes& Lighting Panels etc.

65mm x 12 mm GI Flat

5 Rod Earth Electrode 40mm dia, 3000 mm long Mild Steel 6 Pipe Earth Electrode (in treated earth pit)

as per IS 3043. 40mm dia, 3000 mm long Galvanised

Steel

10.5. Laying of Power Cable

10.5.1 Scope

The proposed CSS will be fed from existing 33/11kV Sixmile substation through Single core 33kV XLPE, Aluminum, underground cable. The laying process of cable shall be of directly buried type.

10.5.2 While laying the cable the contractor has to follow the criteria mentioned in the ISS 1255/ IEEE 0525. The cable installations should be carried out to meet the requirements of the Indian Electricity Rules, 1956 and other regulations in force and necessary checks or tests, should be carried out prior to commissioning for compliance with such rules and regulations.

10.5.3 The direct burial method of cable involves digging a trench to the extent of 1.05 M in the ground and laying cable(s) on a bedding of minimum 75 mm sand at the bottom of the trench,: and covering it with additional sand of minimum 75 mm and protecting it by means of tiles, bricks or slabs.

10.5.4 Minimum bending radius shall be 20D wherever it requires bends. Again the tensile strength shall be considered as 5D2.

10.5.5 The spacing between the cable shall be minimum D of the cable and it shall be maintained throughout the run.

10.5.6 Care must be exercised in backfilling to avoid large or sharp rocks, cinders, slag, or other harmful materials.

10.5.7 Marker flag of cast iron to be put at an interval of every 10 meters.

105

Single Line Drawings

106

CABLE LAYING DIAGRAM

107

GUARANTEED TECHNICAL AND OTHER PARTICULARS

(To be filled in by Bidder)

1.0 Guaranteed technical particulars of 33 kV Auto-recloser

Technical Particulars Requirements as per specs Bidder’s offer

Construction Interruption Medium: Vacuum The VI is fully welded and sealed 316 grade stainless steel enclosure, the enclosure is filled with SF6 gas.

Installation Pole Mounted Operation Gang operated (to avoid pole

discrepancy as in case of single pole operation)

Rated Voltage and frequency

36 kV, 50 Hz

Normal current at 40 o C ambient

630 A .

Short time withstand current

25 kA for

Duration 1 seconds Making current 62 kA (peak) Dielectric values Power frequency withstand voltage

a) Phase to Earth 70 kV b) Across open contact 70 kV Lightning Impulse withstand Voltage a) Phase to earth 170 kVp b) Across open contact 70 kVp Capacitive current

a) Line charging 5 A b) Cable charging 40 A c) Transformer magnetizing current

22 A

No. of openings circuit breaker is capable of performing without inspection replacement and maintenance At no load 10,000 At 50 % of rated current 10,000 At full SC current 100

At 100 % of rated current

10,000

Operating sequence O- 1st rt - C O - 2nd rt – CO - 3rd rt - CO Open followed by 300 second recovery time. rt: reclose time 1st reclose time range: 0.3 -180 sec 2nd reclose time range: 2-180 Sec 3rd reclose time range: 2-180 sec

108

Technical Particulars Requirements as per specs Bidder’s offer

Time resolution: 0.1 Sec Type of operating mechanism

LV Solenoid, Spring

Terminal Bushings

a) Creepage distance 1100 mm b)String length VI Housing The vacuum interrupters should be

encapsulated in silicon rubber

Insulating rod N/A Energy (force) stored in a fully charged condition

a) Closing

b) Opening Closing time Opening time Closing time Opening time

Pole discrepancy No discrepancy as all three phases are to be mechanically ganged

Closing

Opening Co-Operation Total length of stroke of mechanism

Type of contact in interrupter

Vacuum Interrupter

Material of contact Chromium Copper Contact pressure at no load ( closed condition of CB)

As per Manufacturers recommendations and validated by type testing

Temperature rise of contact for 50o C ambient

As per standard

Mass of the Auto Recloser (Approx)

As per design

a) Base Structure with operating mechanism

As per design

b) Mechanism As per design c) Cabinet As per design d) Total Mass As per design Protection class for cabinet

The control and communications cubicle shall generally comply ingress protection of IP65 rating for the main electronics module.

Corrosion protection for cabinet

316 marine grade stainless steel.

Structure Reclosure & Controller tank: 316 marine grade stainless steel recloser. Reclosure bushing: Solid Dielectric.

109

Technical Particulars Requirements as per specs Bidder’s offer

Bushing Mounting Bracket: Mild steel with a hot dip Galvanized finish.

Auxiliary contacts Auxiliary contacts shall be provided for both the open and closed position indications as well as for mechanism locked indication. These contacts shall be monitored by the control cubicle via the umbilical cable provided. They shall not be available for external connection. Additional contacts shall be provided by fitting I/O expander card the IOEX.. IOEX shall have at least 12 optically isolated inputs and 8 clean contact relay outputs. A comprehensive I/O map should be available. The user can map any binary data in the internal controller database, and Boolean combinations of binary data, to the IOEX outputs for transmission to the RTU. IOEX inputs can be programmed to perform a variety of control functions on the controller, including Trip, Close and protection ON/OFF etc. A total of 8 auxiliary contacts shall be provided.

a) NO and NC contacts provided (More by multiplication contractor)

As above 4 of each shall be provided

b) Whether convertible at site

As above

c) Breaking current DC and inductive circuit at 110 V and 220 V DC resp at L/R= 25 ms.

The IOEX output contacts rating be indicated for particular voltage level.

d) Breaking current AC and PF=0.8 at 230 VAC.

The IOEX output contacts rating be indicated for particular voltage level.

Maximum load on foundations ( inclusive of the mass of the circuit breaker)

As per design ( be indicated excluding HV cable)

a) Compression (Open operation)

b) Tension ( Close operation)

Altitude above MSL (max)

1000m

110

Technical Particulars Requirements as per specs Bidder’s offer

Wind pressure 180 km per hour Closing coil details The recloser shall be supplied

complete with its own self contained operating mechanism and separate pole top control cubicle. Operation of the recloser is via actuator activated by discharging stored energy capacitors housed in the control cubicle which in turn are charged by the on board power supply batteries connected in series to provide a DC system voltage as per design. The batteries are temperature compensated float charged from the onboard battery charger. Operation is therefore independent of HV supply.

a) Rated voltage As per design b) Operating Range As per design

Opening coil details As per design

a) Rated Voltage As per design b) Operating Range As per design Static terminal pull( Horizontal and lateral )

Auxiliary transformer details

a) Standard Ratio The auxiliary supply voltage can be 240 V, 110V, 28 V. This PT is used as an auxiliary supply to charge the batteries and is not used for measurement. Each HV bushing shall includes a CVT for measurement of voltage.

b) Class of accuracy As above c) Rated Burden As above d) Installation As above Short Circuit breaking capacity

a) Terminal Fault 25kA(R.M.S) b) Out of phase 25kA(R.M.S) DC component 20%

Details of protective systems employed

To be furnished as per specifications

Details of communication systems employed

The PTCC offered shall have to be specifically designed to simplify interface with a remote SCADA system. The controller shall include an on board RTU and a radio power supply user programmable between 5-15 V dc and rated for 3 A continuous, or 5 A for 30

111

Technical Particulars Requirements as per specs Bidder’s offer

seconds with a 20 % duty cycle. It shall have 2 nos RS232 ports, 1 on board V23 modem. Remote control and indication should be readily available using protocols such as DNP3 or IEC870-5-101 and IEC 61850 Windows Switchgear Operating System, WSOS software. The main SCADA telemetry port is connected to a DCE using a serial data cable with a standard DB25 male plug. This port provides transmit, receive and ground will all necessary handshaking lines. This interface is provided to connect to conventional modems which provide the correct signaling for the communication network used, e.g. optical fibre modem or a UHF Digital radio with onboard serial interface. The maximum baud rate supported on port P8 is 19200 for complete details of the individual port configuration parameters. In addition to this interface a second serial interface is located on the electronics compartment cover above the Operator Control Panel. This connects to port P9 an RS232 port on the CAPM for use with WSOS on a portable computer. This port is also used to upgrade CAPM operating software, including new telemetry protocols. The maximum baud rate supported on P9 is 19200. Furthermore the PTCC includes an on board 1200 baud V23 FSK modem. The RS232 serial ports can be configured between 1200 and 19200 baud. The V23 Modem port is fixed at 1200 baud. The available I/O map can be user customized utilizing software.

112

2.0 Surge Arrestor

Sl.no

Particulars

1. Name & Address of Supplier & Manufacturer

� Surge Arrestor

� Surge Monitor

� Line Dis-connector

� Metal Oxide Block

� Terminal Clamp

2. Name & address of collaborator, if any

3. Standard to which surge arrestors conforms

4. Surge Arrestor

4.1 Voltage rating (KV rms)

4.2 Continuous Operating Voltagte (KV rms)

a) Continuous Operating Voltage (KV rms)

b) Leakage current at continuous operation voltage

c) Partial discharge at 1.05 COV (PC)

d) Permitted leakage current of arrestor beyond which arrestor is faulty :

5. Frequency (Hz)

6. Nominal discharge current (wave shape – 8 / 20 micro second) (KA)

7. Pressure relief rated current (KA rms)

8. Steep current protection level at 10 KA

a) Lighting impulse protection level at

113

Sl.no

Particulars

5 KA and 10 KA (KVP)

b) Switching impulse protection level with 40 x 80 micro-sec. Wave at 500/1000 A

9. Long duration current impulse withstand capacity and virtual duration

10. Line discharge class

11. Thermal runaway limit of arrestor

12. Energy capability (kJ/KV)

13. Pressure relief rating

14. Dry arcing distance

15. Reference current and reference voltage

16. Arrestor housing

16.1 Power frequency one minute wet withstand voltage (kV rms)

16.2 Lighting impulse dry withstand voltage (KVP)

16.3 Creepage distance

a) Protected

b) Total

16.4 Short circuit withstand capacity

16.5 Bending moment (mm)

17. Dis-connector

a) Constructional Details

b) Other information as applicable to surge arrestor

18. Surge monitor

a) Constructional details

114

Sl.no

Particulars

b) Degree of protection

19. Suitable for hot line washing

20. Dimension & weight

22. Details of packing

23. Licence number and date for using ISI certification mark if any

24. Ammeter for discharge current

a) Type & Make

b) Accurancy

c) Range (mA)

25. Residual voltage

26. Follow current

27. Any other information

115

3.0 XLPE Cable

S.NO. Description 33 kV

1.0 Maker’s Name, Address 2.0 Type 3.0 Applicable Standard

a) Construction b) Testing

4.0 Voltage Grade, kV 5.0 Suitable for system with

a) Service Voltage b) Neutral Earthing

6.0 Maximum Conductor Temperature a) Continuous b) Short time (Short Circuit)

7.0 Conductor a) Material & conforming standard

b) Grade c) Size, Nominal Area

d) No. & Nom. Diameter of wire in each conductor, Before stranding

8.0 Shielding on conductor a) Material b) Grade c) Type/Applicable Standard d) Thickness (mm)

e) Tolerance of thickness 9.0 Insulation

a) Material b) Grade c) Type/Applicable Standard d) Thickness (mm)

e) Approx. dia. Of core over insulation 10.0 Shielding on Insulation

a) Material b) Grade c) Thickness, extruded layer, mm d) Approx. dia. Of cable over shielding

10 A Copper Tape Screen

a) Material & Type b) Nominal thickness of copper tape, mm

10 B Water barrier over copper screen a) Material & Type b) Approx. thickness of tape, mm

10 C Redial Water barrier

a) Material & Type b) Approx. thickness of tape, mm

11.0 Inner Sheath a) Material & Type b) Applicable Standard

116

S.NO. Description 33 kV

c) Thickness, mm d) Extruded? Yes/No. d) Approx. outside dial. over sheath, mm

12.0 Armouring a) Material & Type b) Applicable Standard c) Fictitious calculated dial over inner sheath

(under armour), mm

d) Size(Approx. No x Nom. Wire Dia), Nominal Area

e) D.C. Resistance of armour at 200C

f) Short circuit current carrying capacity 13.0 Overall sheath

a) Material & Type b) Applicable Standard c) Calculated dial under sheath (over armour)

(As per annexure A to IEC 60502-2)

d) Thickness, Nominal e) Colour

f) Tolerance of thickness 13 A Conducting layer over outer sheath 14.0 Approx. overall diameter 15.0 Standard drum length with tolerance 16.0 Net weight of cable, approx. 17.0 Approx. weight of empty drum

18.0 Continuous current rating for standard IS condition laid direct

a) In ground, ground temp 300C, Amps b) In duct, ground temp 300C, Amps c) In air, ambient temp 300C, Amps

19.0 FOR XLPE CABLE 19.1 Continuous current for temperature of 900Cand

also withstand temperature of 1300C, Amps

19.2 Short circuit current for 3 second a) Conductor, kA

19.3 Electrical parameters at maximum operating temperature

a) i) DC Resistance at 200C, conductor ohm/km ii) AC Resistance at 900C, conductor, ohm/km

b) Reactance at 50C/s, approx., ohm/km c) Impedance, Approx., ohm/km d) Capacitance per phase, Max,, Micro F /mm

e) Vol. Resistivity at rated operating temperature 900C, ohm/km

f) Loss tangent g) Partial discharge value h) Charging current at normal operating voltage,

mA/

19.4 Recommended minimum bending radius

The cables shall be tested as specified under

117

S.NO. Description 33 kV

a) Conductor resistance test b) Partial discharge test c) High voltage test (specify test voltage for 5

minutes)

118

4.0 ACB

Sl No Description To be filled up by bidder 1.0 Name and address of manufacturer 2.0 Whether ACB is type tested, furnish test report 3.0 Rated voltage 4.0 Insulation grade 5.0 Impulse withstand voltage 6.0 Rated current 7.0 Short circuit breaking capacity 8.0 IP protection 9.0 Number of operations at rated current without

maintenance

10.0 Number of operations at rated short circuit current without maintenance

11.0 Type of operating mechanism 12.0 Watt loss 13.0 Protection functions:

a) O/L with IDMTL characteristic b) Instantaneous short circuit c) Earth fault

14.0 Whether programmable at site 15.0 Whether it has event logger & numbers of event it

can stored

16.0 Type of indication; alarm, trip etc. 17.0 Whether SCADA compatible

119

5.0 Disconnectors

Sl No Description To be filled up by bidder 1.0 Name and address of manufacturer

2.0 Type 3.0 Standards 4.0 Rated voltage 5.0 Rated frequency 6.0 No. of poles 7.0 Rated current 8.0 Maximum temperature rise over ambient 9.0 Rated operation duty 10.0 Rupturing capacity at rated voltage 11.0 Rated short time current; for 3 sec & 1 sec 12.0 Rated making current 13.0 Impulse voltage withstand 14.0 Power frequency voltage withstand 15.0 Voltage factor when switching off 16.0 Minimum SF6 Gas pressure 17.0 No. of isolator operation permissible without requiring

inspection, replacement of contacts and other main parts

At 100% rated current At 100% rated breaking current

18.0 Provision for mechanical safety 19.0 Mechanical ON, OFF, Earth switch indicator 20.0 Operation counter 21.0 Manual spring charging facility

120

ANNEXURE : I : 33 KV

GUARANTED TECHNICAL PARTICULARS FOR 33 KV CT / PT SETS:

S.N Description Requirements To be offered by the

bidder

1 Type Paper insulated, oil cooled, outdoor

type

2 Potential Transformer Three Phase star / star PT

a) Rated voltage 33 KV

b) Highest system voltage 36 KV

c) Vector group Star/Star

d) Burden 30 VA at 0.8 PF lag

e) Accuracy 0.5

f) Core material Laser grade CRGO

g) Rated voltage factor & time

1.5 continuous and 1.9 for 30 sec.

h) Power frequency withstand voltage

i) Primary winding

ii) Secondary windings

i) L I withstand voltage

j) Core clamping arrangement

k) Insulation class

l) Applicable Standard

3 Current transformer Single ratio

a) No of CTs Three single phase CTs

b) Type Paper insulated, oil cooled, outdoor

type

121

c) CT ratio As per clause DATA SHEET

d) CT burden per phase 5VA at 0.8 PF lag

e) Accuracy class 0.5S

f) Applicable Standard IS 2705

g) Short time current

i) Thermal rating 16.0 kA for 1 second

ii) Dynamic rating 2.5 times of IThermal

h) Power frequency withstand voltage

i) Primary winding 70 KV (rms) for 1 min

ii) Secondary windings 3 KV (rms) for 1 min

i) Impulse withstand voltage 170 KV (Peak)

j) Maximum Current density

i) At STC for 1 second 165 A/mm2

ii) At rated current 1.5 A/mm2

k) Type of core Toroidal

l) Core material µ metal

m) Core clamping arrangement

With Bakelite sheet

n) Insulation class A

o) Instrument Security Factor

Less than 2.5

Fittings and Mountings

a) Earthing terminals 2 Nos

b) Oil filling hole with plug 1 No (15 mm)

c) Drain plug 1 No (20 mm)

d) Oil level gauge 1 No

e) HV bushing

122

i) Number 6 Nos

ii) Make BHEL/Jayshree/Raychem/WS

iii) Metal parts

Duly Tinned Copper with 3

Nos. of Nuts, 2 Nos. of plate washers, 1 Nos. of spring washer and

6 Nos. of 90 mm2 Bi-metallic lugs

iv) Creepage Distance 1100 mm

v) Bird Guard 6 Nos

vi) Applicable Standard IS 3347

f) Lifting lugs

i) On top cover 2 Nos

ii) On sides 4 Nos

g) Lifting lug thickness 8 mm

h) Rating & terminal marking 1 No

i) Polarity marking 1 No

j) Size of LT terminal 6.0 mm dia & 35.0 mm long

k) LT terminal material Tinned copper

l) Bolts, Nuts & Washer

i) Grade of bolts SS 304

ii) Size of bolts M12 x 50 mm long

iii) Center to center distance between adjacent bolts

115 ±5 mm

iv) Grade of washer SS 304

v) Minimum thickness of washer

2 mm

vi) Gasket 8 mm, Neoprene/Nitrile

m) Double compression flame proof metallic gland

1 No

123

n) PRV 1 No

i) Minimum pressure at which PRV will be operated

ANNEXURE: I-A : 33KV Sub: Technical Design parameters for 33 KV CTPT set.

S.N Description Offered by Supplier

1. PT HV winding

a) HV Conductor size

b) Nos of coil per phase

c) Nos of turn per phase

2. PT LV winding

a) LV conductor size

b) Nos of turn per phase

3. PT core

a) Core Characteristic as per core material supplier’s data i.e. BH curve (Please enclose curve)

b) Cross section area of core

4. CT

a) Instrument security factor

b) CT primary conductor size

c) No of turns of primary winding

d) CT secondary conductor size

e) Nos of turns of secondary windings

f) Nos of parallel path used in secondary winding

5. Qty. of first filling of transformer oil

6. Tank

a) Tank sheet size

124

i) Top and bottom thickness

ii) Side wall thickness

b) Tank size

i) Overall dimensions

ii) Inside dimensions

c) Rating of PRV

ANNEXURE: I-B : 33 KV

Sub: Deviation in offer for 33KV CTPT Sets.

Sl No Description APDCL’s

Requirement

Deviated

parameter

Reason of

deviation

N.B. Please offer deviation from technical particulars in this sheet only. If there is no deviation, please indicate clearly in this Annexure that our offer have no deviation from Technical Specification of this tender.

ANNEXURE – III

Schedule of Type Test for CT as per clause No. TYPE TEST CERTIFICATE:

01. Verification of terminal marking and polarity.

02. High voltage power frequency tests on primary windings.

03. High voltage power frequency tests on secondary windings.

04. Over voltage inter turn test.

05. Determination of error according to the requirement of appropriate accuracy class.

06. Short time current test.

07. Impulse voltage test.

08. Temperature Rise Test.

09. Instrument Security Factor Test on Both phase of the CT as per Cl. No.7.1.2 of Is-2705 (Part-II).

10. High Voltage Power-frequency Wet withstand voltage test as per Cl. No.9.9 of IS-2705 (Part-I). Schedule of Type Test for P.T as per Clause No. TYPE TEST CERTIFICATE:

01. Verification of terminal marking and polarity.

02. Power frequency dry withstand test on primary winding.

125

03. Power frequency dry withstand test on secondary winding.

04. Determination of errors according to the requirement of the appropriate accuracy class.

05. Temperature rise test.

06. Impulse voltage test for voltage transformer for service in electricity exposed installation.

07. High Voltage Power-frequency Wet withstand voltage test as per Cl. No.9.7 of IS-3156 (Part-I).

ANNEXURE – IV

Schedule of Acceptance Test for CT as per clause No. ACCEPTANCE TESTS:

01. Verification of terminal marking and polarity.

02. High voltage power frequency tests on primary windings.

03. High voltage power frequency tests on secondary windings.

04. Over voltage inter-turn test.

05. Determination of error according to the requirement of appropriate accuracy class.

06. Instrument Security Factor Test on Both phase of the CT as per Cl. No.7.1.2 of Is-2705 (Part-II).

Schedule of Acceptance Test for P.T. as per Clause No. ACCEPTANCE TESTS:

01. Verification of terminal marking and polarity.

02. Power frequency dry withstand test on primary winding.

03. Power frequency dry withstand test on secondary winding.

04. Determination of errors according to the requirement of the appropriate accuracy class.

ANNEXURE – V

Schedule of Routine Test for CT as per clause No. ROUTINE TESTS:

01. Verification of terminal marking and polarity.

02. High voltage power frequency tests on primary windings.

03. High voltage power frequency tests on secondary windings.

04. Over voltage inter-turn test.

05. Determination of error according to the requirement of appropriate accuracy class.

06. Instrument Security Factor Test on Both phase of the CT as per Cl. No.7.1.2 of Is-2705 (Part-II).

Schedule of Routine Test for P.T. as per Clause No. ROUTINE TESTS:

01. Verification of terminal marking and polarity.

02. Power frequency dry withstand test on primary winding.

03. Power frequency dry withstand test on secondary winding.

04. Determination of errors according to the requirement of the appropriate accuracy class.

126

GUARANTEED TECHNICAL PARTICULARS FOR 3 PHASE 4 WIRE CT PT OPERATED TRIVECTOR ENERGY METER Sl. No.

Item Bidder’s data

1 Type of Meter

2 Application 3 Standard to which the meter

confirm

4 Rated Voltage 5 Rated Current 6 Frequency 7 Overload capacity 8 Minimum starting current in % of

base current

9 Power Factor Range 10 Power loss in potential circuit 11 Power loss in current circuit 12 Change in error due to a. Variation in frequency b. Variation in temperature c. Variation in voltage

13 Accuracy Class 14 Type of Energy Registration

Mechanism.

15 MD Reset Mechanism 16 Dynamic Working range a) Voltage b) Current

17 Type of load (linear, non linear, balanced /unbalanced at any P.F.)

18 Total Weight of meter � 19 Dimension of the meter 20 Details of meter base & cover 21 Terminal Cover details 22 Capability for fraud Prevention &

detection

23 Sealing and Locking Arrangement 24 Display details i. Display Cycle (descriptive in

order of display sequence) auto and manual

ii. Period of display of each parameter

iii. Display scroll-lock facility iv. Backlit LCD v. display off period between two

127

cycles vI. No of digits of display and

height of character.

25 Memory Capacity 26 Non volatile memory retention

capacity

27 Powering on facility in absence of mains

28 Tamper data preservation capacity :

a) on display b) with meter data downloading

provisions.

29 Tamper logic in detail 30 Load Survey details : a) Parameter measured & Logged b) Logging interval c) No. of days of Load Survey

31 Time of the day Zone Provision 32 Type of communication: a) Local-Optical port details with

protocol

b) Additional Communication port for AMR compatibility with protocol

33 Real Time Clock 34 Self Diagnostic Features (Provide

Details)

35 Certification Marks 41. METER CABINET SPECIFICATIONS: 41.1 The meter cabinet should be made of MS steel plates of minimum thickness 1.2 mm (except for the roof and base). The minimum thickness of the roof and base MS steel plates should be 1.5 mm. 41.2 The meter cabinet should have two doors (one inner and one outer door) as shown in

the drawing / 3D model. The inner door should hold the optical port for data interchange with external devices.

41.3 The inner box should have an adjustable meter fixing plate which allows forward and backward movement of the meter as per requirement. The modem fixing plates should be installed outside the inner box.

41.4 The base of the outer box should have a gland suitable for insertion of 10 Core, armoured, 2.5sq.mm cable. The doors should have proper high quality rubber gaskets to prevent entry of rain-water, dust

128

etc. 41.5 Both the inner door and outer door should have meter viewing window with high quality

toughened glass. One metallic wired net (2 mm wire) should be provided at the viewing window of the outer door so that in case of break the meter is not accessible to unauthorised people.