ASSAM POWER DISTRIBUTION COMPANY LTD.(CAZ) · 2013-10-29 · ASSAM POWER DISTRIBUTION COMPANY LTD OFFICE OF THE CHIEF GENERAL MANAGER (D), APDCL, (CAZ) GUWAHATI-1 TENDER INVITING

ASSAM POWER DISTRIBUTION COMPANY

LTD.(CAZ)

BIDDING DOCUMENT FOR

CONSTRUCTION & COMMISSIONING OF DIFFERENT PACKAGES UNDER DEPOSITSCHEME

ON

“TURNKEY” BASIS

SCHEME: DEPOSIT

NIT REFERENCE: CGM (D)/APDCL (CAZ)/DEPOSIT/2012-13/01

INDEX

Notice Inviting Tender Page- 1-2

Tender Inviting Proposal Page- 3-8

Tender Proforma – Part –I (Techno Commercial Bid) Page- 09

Tender Proforma-Part-II (Price Bid) Page- 10

BOQ of Diff Packages Page- 11-12

General Requirements Page-13-16

Technical Specifications Page- 17-70

APDCL , CAZ

Bid Document Deposit 12-13 Page 1

Tender Inviting Proposal APDCL(CAZ)

ASSAM POWER DISTRIBUTION CO. LTD

NOTICE INVITING TENDER

Short Tender Notice No CGM (D)/APDCL(CAZ)/DEPOSIT/2012-2013/01

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

joint venture)/Firm(s) having valid electrical license issued by the competent authority of the Govt. of Assam for

below mentioned of works under Tezpur/Nagaon Electrical Circle of APDCL.

Name of the work: As per table below.

Source of fund: Deposit

Eligibility Criteria: Average annual turnover of the bidder for last three consecutive financial years against the

package should be as per the requirements shown in the table.

Cost of Tender Paper for the Package: Rs.10000/-(Rupees Ten thousand) only for each package 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 paper can be purchased on all working days w.e.f.

07.05.12 to 14.05.12 from the office of the Chief General Manager (D), APDCL(CAZ), Bijulee Bhawan, 2nd

Floor Guwahati-1.Alternativly, the Bid document can be downloaded from the APDCL’s website:

www.APDCL.gov.in for tender submission purpose. The bidder using downloaded document will attach with

their Bid an A/C payee demand draft/Banker’s cheque (non- refundable) of Rs. 10000.00 (Rupees Ten

thousand) only duly pledged in favour of ASSAM POWER DISTRIBUTION COMPANY

LIMITED.Guwahati-1” as cost of the tender paper. Bidder will ensure that the payment instrument

submitted against the Bid must be procured on or before the closing date of sale for Bid documents &

also ensure that the documents in full is downloaded and used.

Earnest money: As shown in the table below. However, in case of SC/ST/OBC bidders, the amount will be

50% of the shown value.

Date of submission of Tenders: Up to 13-00 Hrs. of 22.05.12

Date of opening of Bid: Techno commercial bids will be opened at 13-30 Hrs. of 22.05.12 and the price

bid on a date to be notified later on.

For Tezpu/Nagaon Electrical Circle

Package Description of work Completion

period

Earnest

Money (in

Rs.)

Turn over

requirement

(in Lacs)

TEZ/Missa/01

Construction of 33 KV line on PSC pole with raccoon

Conductor from Depota GSS to Missamari Military

Station under Tezpur Electrical Circle

9 months 380000.00 100.00

NG/DRDO/02

Construction of 33kV line on GI Pole with raccoon

conductor from DRDO dedicated 33kV line tapping near

Amoni Rly Station DP structure to DV1 site of DRDO,

Kahanbasti village, Salana post, Nagaon under Nagaon

Electrical circle as per direction

9 months 425000.00 100.00

Note:

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

2. The tenderers may submit tender(s) against one package or multiple packages.

3. Bids must be submitted in two parts as Techno Commercial and Price bid in two

separate envelope super scribing (a) Tender No. (b) Name of the bidder with full address (c)

Name of the package against which the bid is offered.

4. The bid against each package should be submitted separately in one envelope.

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

the form of NSC/KVP/Term Deposit/FD pledged in favour of “ ASSAM POWER

DISTRIBUTION CO. LTD, Guwahati-1”. Any tender without earnest money will be rejected

outright.



6. Part-I of the Bid shall consists of information as required and all Technical Bidding

Schedules (GTP), all Price Bidding Schedules with all quantities filled up but without

any Price, etc and Part-II shall consists of Price Bidding Schedules with all quantities

and prices filled up. Details are available in General Instruction to Bidder in Section-2,

Volume-1 of the Bid Document

7. Quoted rate should be inclusive of all taxes and duties and firm. Taxes should be shown

separately

8. Quote rate must valid for minimum 180 days.

9. The tender should be addressed and submitted in the office of the Chief General Manager

(D), APDCL (CAZ), Bijulee Bhawan, 2nd

floor, Paltanbazar, Guwahati-1 and will be opened

on the scheduled date & time in presence of the intending tenderers.

10. Only those bidders whose Part-I Bid ie. Techno Commercial bid (Qualification) is found

acceptable shall be considered for opening of Price Bid. The date and time of opening of Part-

II Bid (Price) shall be communicated to those bidders whose bids are qualified for opening.

11. The Company reserves the right to accept or reject any tender in part or in full or spilt the

work of any package without showing any reason thereof.

12. The bidding documents are not transferable and cost of bidding document is not refundable

under any circumstances. 13. The bidder who has downloaded the documents from our website must intimate the same to

our e-mail address without fail.

Chief General Manager (D),

APDCL, Bijulee Bhawan,

Paltanbazar, Guwahati-781001



ASSAM POWER DISTRIBUTION COMPANY LTD OFFICE OF THE CHIEF GENERAL MANAGER (D), APDCL, (CAZ) GUWAHATI-1

TENDER INVITING PROPOSALS WITH TERMS & CONDITIONS

FOR CONSTRUCTION OF 33 KV line, ON TURNKEY BASIS 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 construction of 33 KV lines on turnkey basis as per the scope of work described in the

following.

2. Scope of Work

The various activities under the scope of work shall among other related aspects cover the following. i. Procurement and supply of all materials required for the work.

ii. Site unloading, storage and handling of all materials supplied including watch and ward for

safe custody.

iii. Site fabrication work as per requirement.

iv. Submission of implementation schedule from the date of award of contract for: -

• Route survey for laying new line.

• Erection, testing and commissioning of all materials/equipment supplied/system installed.

v. Project management and site organization.

vi. Obtaining clearance from statutory Agencies, Government Departments, Village Panchayats

etc.

vii. Submission of specification/Test Certificate/Drawings etc. of all materials supplied.

viii. A list of various items normally involved in proposed type of work is provided in this

document. This, however, is not to be considered as limiting but only typical. Vendors’ scope

will include all other items and materials as may be required to effectively complete the work.

ix. Required Jungle cutting.

Above all, the scope of work of the vendor/contractor will include all items and facilities as may be

necessary to complete the electrification work on turnkey basis and as binding requirement.

3. 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 Company and that of REC specification and construction standards. ii. For ready reference, the basic specification of major items, namely- Transformer, conductor,

GI angle for cross bracing, Polymer Disc insulator (70 KN), disc attachment for raccoon

conductor, 33 KV polymer pin insulator, GI channel, 100X50X6X2200 mm, HT stay set, guy

insulator, stay wire, CI earth pipe, GI wire 4/6 SWG, nuts & bolts, washer, G.I tubular pole,

PSC pole, , danger plate, pole clamps, boulder for PSC pole grouting, PCC for G.I tubular

pole grouting, are provided in the Technical Specification Section. Based on this, the vendor shall draw total specification for procurement after approval of Company.

iii. 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.

iv. 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.



v. All items, which may require frequent opening up/ dismantling for maintenance, shall be adequately sealed against any tampering/ theft etc.

vi. All supporting structures shall be of steel as per IS 2602 appropriate grad.

vii. Generally supply and erection of materials and system shall meet the requirement laid down

by REC for rural electrification works.

4. Submission of bid

The bid shall be submitted in a sealed envelope as follows:

i. Techno-commercial bid

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.

ii. Price Bid

Under this will include rates of supply and erection of different items for electrification. The

tender proforma for price Bid is enclosed as Annexure-II.

5. Estimation of material requirement:

The total quantity of materials required in each package is indicated in the Package wise BOQ in

Section 1

6. Award of work: 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) Work should be started within fifteen (15) days from the date of issue of the work order, failing

which order will be cancelled without further correspondence.

iv) The line/Sub-station after completion should be under custody of the contractor till the date of

commissioning and charging. The properties will be taken over by APDCL after satisfactory

commissioning and charging.

7. Period of completion: Nine (9) months from the date of award of work contract.


CAEDCL

8. Implementation schedule:

COMPREHENSIVE IMPLEMENTATION SCHEDULE OF WORK: CONSTRUCTION OF 33KV,

LINE FROM DEPOTA GSS TO MISSAMAR MILITARY STATION AND EXTENSION OF 33KV LINE

FROM DRDO DEDICATED 33KV LINE TAPPING NEAR AMONI RLY STATION DP STRUCTURE TO DV1 SITE OF DRDO, KAHANBASTI VILLAGE, SALANA POST, NAGAON (TURNKEY)

APPROVAL PERIOD EXECUTION PERIOD

S.

N

. Description

15 days 7 days. 32 days 30 days

7 d

ays

60 d

ays

60 d

ays

60 d

ays

50 d

ays

30 d

ays

10 d

ays

1. Preparation & submission

of bid document

2. Approval of Bid Document

3. Floating of Bid and Bidding

period

4. Opening of Bid, evaluation

& approval

5. Issue of Award, agreement

6. Manufacture & supply of

materials

7. Erection of equipments

8. Testing & commissioning

9 Cash Flow in percentage of

total sanctioned amount 2% 98%

Bid Document Deposit 10-11 Page No 6

Notice Inviting Tender APDCL

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.

10.1 Terms of Payment:

During currency of the Contract, maximum 4(four) nos. of progressive Bills will be allowed.

Each progressive Bills should contain items of works which are completed in all respect of supply,

erection for the identified locations . 80% of each progressive Bill shall be paid retaining 20% by the

company (APDCL).

Final Bills will be paid comprising balance works beyond the works already claimed in the

progressive Bills alongwith 20% of the amount retained against the progressive Bills subject to

testing and commissioning & fulfillment of clause-14(d).

10.2 Earnest Money Deposit (EMD):

The Tender must be accompanied with earnest money as mentioned in the NIT against each

package to be deposited in the form of NSC/KVP/Term Deposit/FD pledged in favour

of “ASSAM POWER DISTRIBUTION CO. LTD. Guwahti-1”. The earnest money to the

unsuccessful bidders will be released 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.

10.3 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 14(d).

11. Basic qualifying requirement:

The prospective bidder must fulfill the following pre-bid qualifying requirement

a. The bidder must have valid electrical Contractor’s and Supervisor’s License (HT) issued

by the Licensing Authority of Govt. Of Assam. .

b. The bidder must have adequate experience of doing similar job on turnkey basis at least

15 KM in total.

c. Average annual turnover of the bidder for last three consecutive financial years should

be at least as per the requirement shown in the table against particular package or

packages and the annual turnover should be certified by a registered Chartered

Accountant with balance sheet.

d. The tenderer shall furnish latest Income Tax clearance certificate and sales tax

registration and valid Labour License and WCT registration Certificate.

12. Other requirements:

The Tenderer

i) Should be acquainted himself or his associate with relevant conditions of the local

geography and socio economic setup of the different location of the State and being

capable accordingly to mobilize, organize and expedite the activities.

ii) Should have adequate working personnel comprising of Electrical/ Mechanical

engineers, electrical supervisor, skilled and unskilled labour to be deputed to the

proposed assignment.



iii) Should be conversant with the code/ standards applicable to proposed type of work.

ISS, REC guidelines.

13. Project Management and site Organizations:

In Consideration of the tight schedule of the project, the successful bidder(s) /Contractor(s)

shall exercise systematic closely controlled project management system with the aid of

commonly used soft tools. Following are the major activities/deliverables to be organized

/generated for submission to the Board.

(I) Liaison/Construction offices will be established in each Circle of APDCL.

(II) Work Progress Report:

• Progress monitoring by the contractor as per implementation schedule and approved

milestones.

• Fortnightly progress report will be submitted to the concern Deputy General

Manager, Senior Manager & Sub-Divisional Engineers.

The progress report will highlight the points like, work completion vis-à-vis

planned, plan for next working period, delay analysis vis-à-vis committed schedule

with reasons and remedies etc.

(III) Site Organization.

The vendor at each working site shall establish the following.

• Store house

• Site fabrication facilities

• Construction supervision office

All offices shall be adequately furnished and staffed so as to take all site decisions independently without frequent references to head Work’s/offices.

14. Guarantees and Penalties

a) Liquidated Damages (LD)

The proposed work is on top priority of Government of India 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 18 (Eighteen) months from date of commissioning of a system. In case of

detection of any 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 the following items

• All Types of Insulators with Hardware fittings.

• Conductor.

• Stay set

• All other equipment usually 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 18

(eighteen) months @ 10% of total value of work executed shall have to be furnished by the

Contractor before final payment.



15. Approvals/Clearances:

1. APDCL’s Engineer shall approve all drawings and documents prepared by the

contractor for construction of the Lines.

2. The contractor shall obtain all statutory approvals and clearances from the statutory

authorities before charging the system.

16. 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.

17. Submission of documents.

a) With 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. Turnover

of the vendor has to be certified by chartered Account. iii) Details past experience.

iv) Brief writ-up on methodology to carry out the assignment, if awarded.

v) Details of manpower to be engaged for the assignments.

vi) Any other information, the vendor may feel facilitative in evaluating the bid.

vii) Copies of contractor and supervisor’s license, income Tax clearance certificate, turnover, etc.

viii) Photo copy of the PAN card.

b) During project execution

i) All documents for approval shall be submitted in 2 copies.

ii) All final documents to be submitted to statutory organizations will be furnished as per

requirement of the authority.

18. Funding of the project.

The proposed work is to be done under Deposit Head.

19. 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

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.

20. Terms and conditions, which are not specified, herein above will be governed by the

Company’s General Terms and Conditions of supply and erection.



Annexure - I

Tender Proforma part – I (Techno-commercial Bid)

NIT No. CGM (D)/APDCL(CAZ)/DEPOSIT/2012-2013/01 Due date of Tender: 22.05.2012

1. Name and full address of the :

Tenderer.

2. Particulars of payment made for :

purpose of tender documents money

receipt No: and Date.

3. Amount of earnest money paid with :

Money receipt No and date/ Bank Call

Deposit No: and Date.

4. Whether Sales Tax and Income Tax : Yes / No

clearance certificate submitted

5. Sales Tax Registration No: :

6. WCT registration certificate with validity :

7. Acceptance of guarantee clause of :

Materials /equipment and system

Installed individually and for integrated

Operation.

8. Acceptance of penalty clause :

9. Acceptance of terms of payment :

10. Certificate/ documents regarding works :

Done with value with last three years if any

11. Certificate/ documents regarding adequate :

Experience of doing similar job of rural

Electrification or similar electrification work

12. Acceptance for carrying out electrification :

Work of at least one (one) similar work

13. Details of manpower and T&Ps including :

Vehicles available with the firm to be

Enclosed separately.

14. List of documents enclosed : .

Signature with full name

and designation of the Bidder

(Authorized person)



Annexure - II

Tender Proforma part-II (Price Bid)

NIT No. CGM (D)/APDCL(CAZ)/DEPOSIT/2012-2013/01 Due date of Tender: 22.05.2012

Proforma for unit rate inclusive of all duties & taxes in respect of supply, erection,

testing and commissioning

Package for which tendered: -

Name and full address of the Tenderer:

.

Cost of materials

inclusive of freight,

insurance handling

from manufacturer

unit to work site

(inclusive of all

taxes & duties) Rs.

Cost of

erection/dismantling

of materials &

testing &

commissioning

(inclusive of all taxes

& duties) Rs.

Sl.

No Item Unit Quantity

Unit

Rate Total

Unit

Rate Total

Grand total

in Rs.

1 2 3 4 5 6=(4x5) 7 8=(4x7) 9=(6+8)

As per

BOQ

As per

BOQ As per

BOQ

Signature with full name

and designation of the Bidder

(Authorized person)



Annexure -I

BOQ for 33kV dedicated 33kV line from Depota GSS to Missamari military Cantonment

32 KM

Work speicifcation: - 3 Phase 33kV line on Single PSC Pole with AAAC Racoon Conductor .

Average span 50 Mtrs.

Sl.

No. Item Description Unit Qty

1 PSC Pole including necessary boulder for packing No 960

2 GI Channel cross arm for DP & FP (100X50X6X3200) No 750

3 GI 33kV 'V' cross arm with channel size 100X50X6mm with back clamp No 512

4 33kV Pin (polymer) insulator No 2240

5 33kV Disc polymer Insulator complete with hardware fittings for tension for

racoon conductor No 960

6 33kV Disc polymer Insulator complete with hardware fittings for suspension for

racoon conductor No 960

7 AAAC Racoon Conductor (7/3.81) mm Km 106

8 Stay set (HT)complete with required Guy Insulator, Stay wire 7/10SWG (7/3.15) Set 280

9 GI cross bracing Tension for DP & FP structure (50X50X6) 12m per bracing Set 160

10 PG clamp for Racoon ALCON 81 No 480

11 GI assorted bolt & nut (Assorted) Kg 672

12 Danger plate 33kV No 735

13 Barbed wire anti-climbing Kg 400

14 CI Earth pipe 1.8m with required salt , charcoal etc. for earthing No 224

15 GI wire 6 SWG for guarding Kg 600



Annexure -II

BOQ for extension of 33kV line from DRDO dedicated 33kV line tapping near Amoni Rly

Station DP structure to DV1 site of DRDO, Kahanbasti village, Salana post, Nagaon

Work specification: - 3 Phase 33kV line on Single GI Tubular Pole AAAC Racoon Conductor

with Channel Cross Arm. Average span 50 Mtrs.

Sl.

No. Item Description Unit Qty

1 GI Tubular Poles SP 76 with required CC foundation No 349

2 GI Channel cross arm for DP & FP (100X50X6X3200) No 238

3 GI 33kV 'V' cross arm with channel size 100X50X6mm No 195

4 FI top cleat (100X50X6X350mm) No 195

5 33kV Pin (polymer) insulator No 816

6 33kV Disc polymer Insulator complete with hardware fittings for tension for racoon conductor

No 336

7 AAAC Racoon Conductor (7/3.81) mm raccoon with necessary Al binding

and tap Km 40.755

8 Stay set (HT)complete with required Guy Insulator, Stay wire 7/10SWG

(7/3.15) Set 280

9 GI cross bracing Tension for DP & FP structure (50X50X6) 12m per

bracing Mtr 1428

10 PG clamp for Racoon ALCON 81 No 119

12 GI assorted bolt & nut (Assorted) Kg 700

13 Danger plate 33kV No 329

14 Barbed wire anti-climbing Kg 610

15 CI Earth pipe 1.8m with required salt , charcoal etc. for earthing No 349

16 GI wire 8 SWG for guarding Kg 1000

17 GI Angle Cross Arm (50X50X6X5000) mm for guarding No 10

18 GI hook for guarding No 50

20 Gang Operator air break switch 600 Amps No 4



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 contractors

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.

• Reference to contractors work procedures appropriate to each activity.

• Inspection during fabrication /construction.

• Final inspection and test.

2.0 Training of Personnel

The contractor shall provide necessary facilities for training personnel at their

works/principals works relating to design, manufacture, assembly and testing and operation

maintenance for six personnel free of cost. However, travel and incidental charges of the

personnel will be borne by the purchaser.

3.0 Inspection

3.1 The Owner's representative or third party nominee shall at all times 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.

3.2 The material for final inspection shall be offered by the Contractor only under packed

condition as detailed in the specification. The Owner shall select samples at random

from the packed lot for carrying out acceptance tests. Insulators shall normally be

offered for inspection in lots not exceeding 5000 nos. the lot should be homogeneous

and should contain insulators manufactured in the span of not more than 3-4

consecutive weeks.

3.3 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.

3.4 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.



3.5 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.

4.0 Additional Tests

4.1 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.

4.2 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.

5.0 Test Reports

5.1 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.

5.2 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.

5.3 Record of routine test reports shall be maintained by the Contractor at his works for

periodic inspection by the Owner's representative.

5.4 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.

6.0 List of Drawings and Documents:

6.1 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 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.

6.2 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.

6.3 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.

6.4 Eight sets of operating manuals/technical leaflets shall be supplied to each consignee for the first instance of supply.

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

6.4.2 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.

7.0 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



1.0 TECHNICAL SPECIFICATION FOR EXECUTION OF

WORK (FOR 33KV/11KV & LT LINES)

1.0 SCOPE : ERECTION OF 33 KV LINES WITH GITP-SP76 & 9.75 M,

PSC POLES

The scope covers the survey of the proposed route, tree clearance wherever necessary

transport of materials to the locations, erection of the line testing of the line and

handing over to the APDCL(CAZ) as per specification. Materials such as steel, cement,

PSCC Poles, top cleats, clamps, washers, earth wires, HBG metal, sand, water, cost of

bolts and nuts etc., as given in Annexure-1 are to be procured by the contractor cost of

which shall be included in the bid.

2.0 General :

The Contractor should be well acquainted with the IE Rules 1956 as

amended from time to time and with the Indian Telegraph Act 1889 so that

necessary provisions therein may be followed.

3.0 SURVEY OF THE RUTE

The Tentative route map of the line to be erected will be furnished by the

APDCL(CAZ) to the Contractor along with the copy of the concluded agreement.

The Contractor is required to carry out the detailed survey of the route of the line and

fix up the locations at the average span indicated in the schedule and mark the locations

and submit a detailed route map to the Engineer in charge of the work within 30 days

for approval. In the course of surveying by the contractor, any conspicuous variations in

the change and physical feature to those indicated in the route map and as actually

existing are noticed, the deviations must be brought to the notice of the APDCL(CAZ)

Engineer. The APDCL(CAZ) Engineer if considered necessary shall make alterations,

which shall be carried out accordingly and the APDCL(CAZ) after inspecting the

surveyed route and the revised route map shall be given for final approval in writing.

The contractor shall not commence the work until the final approval of the route map is

given by the Engineer in charge in writing to the contractor.

4.0 WAY LEAVES AND TREE CUTTINGS

Proposals for way leaves and right of way shall be submitted by the contractor.

Permission will be obtained by the APDCL(CAZ) within reasonable time for which due

notice shall be given by the Contractor. The Contractor shall arrange for tree cutting or

tree branches cutting also.

The widths of tree clearance to be adopted for lines of various voltages are as detailed

below:



a) 11 KV / 33 KV LINE (Trunk Line)

All growth within 6.096 M (20 ft) from the center line of support and all trees which

may fall and foul the line.

The Contractor shall take all possible steps to see that standing crops, etc. are not

damaged while attending to tree cutting. When such damage is inevitable the

compensation will be borne by the APDCL(CAZ) provided the damage is with the

prior concurrence of the Engineer. The Contractor shall bear the compensation for

damage caused by the gangs without prior concurrence of the Engineer concerned.

No trees shall be cut until the APDCL(CAZ) has made necessary arrangement with

the authorities concerned and permission is given to the Contractor to fell such trees.

The contractor shall arrange to remove the obstacles as soon as possible.

At such times, when it may not possible for APDCL(CAZ) to arrange right-of-way

for excavation of pole pits or erecting the poles of stringing the line, then at all such

times, the contractor shall shift his gangs to other areas. The rates quoted shall cover

all such contingencies and no extra payments shall be claimed for such

contingencies.

5.0 EXCAVATION OF POLE PITS, STAY PITS AND D.P. PITS 5.1 After the final survey of the line and after marking the pole locations with pegs,

excavation work has to be commenced in accordance to the approved route map.

Excavation is generally done by pick axes, crow V-bars and showers although some

times earth augers are used. Excavation of pole pits in very hard or rocky soil or in

rock beds, may involve blasting with suitable explosives. The pits for the supports are

excavated in the direction of the line as this will facilitate the erection of support are

excavated in the direction of the line as this will facilitate the erection of support, in

addition to giving greater lateral stability, the depth of the foundation to be excavated

for poles shall be in accordance with relevant sketch for the erection of pole or stay of

D.P. etc.

6.0 ERECTION OF SUPPORTS

After the excavation of pits is completed the supports to be erected may be brought to

the pits location. Then the pole may be erected inside the pit. Wooden support may be

utilized to facilitate lifting of the pole at the pit locations.

Before the pole is put into pit, RCC padding may be laid below the pole to increase the

surface contact between the pole and the soil. The padding will distribute the weight of

the pole uniformly on the soil.

Having lifted the pole, the same should be kept in a vertical position with the help of

manila rope of 25 mm dia using the rope as a temporary anchor.

As the poles are being erected say from the pole already erected to the next location

where the pole is being erected, the alignment of the poles are to be checked and set



right by visual check. The verticality’s of the poles are to be checked with a spirit level

on both transverse and longitudinal directions.

Having satisfied that the verticality and alignment are all right, earth filling or

concreting is to be done.

In swampy and special locations, however, before earth filing, the poles are to be

concreted up to ground level of the pit.

After the poles have been set the temporary anchors are to be removed. The supports

shall be buried to a depth as per sketch enclosed.

7.0 ERECTION OF D.P. STRUCTURES FOR ANGLE LOCATIONS (FOR

33/11 KV LINES):

Generally, for angles of deviation more than 20° double pole structures of spacing 1.2

mts (4.0 ft) may be erected. The pits are to be excavated as per bisection of the angle of

deviation.

After the poles are erected, the horizontal / cross bracing should be fitted and the

supports held in a vertical position with the help of temporary guys of manila rope of at

least 25 mm dia. Ensuring that the poles are held in a vertical position (this can be

checked with a spirit level) the concreting of the poles with cement, granite chips of

size 20/30 mm mesh and sand in the ratio M400 conforming to ISS is to be done from

the bottom of the support to the ground level. Before lifting the pole in the pit, concrete

padding of not less than 75 mm thickness may be put for the distribution of the load of

the support on the soil.

After the concreting is done, the pit may be filled with earth after curing of the concrete

is completed.

Four stays along the line, two in each direction and two stays along the bisection of

angle of deviation are to be provided.

Stay concreting may be done with M 400 concrete mixture.

The D.P. shall be erected as per the sketch enclosed.

8.0 ANCHORING AND PROVIDING GUYS FOR SUPPORTS

Guys are to be provided to the supports at the following places (i) Angle locations, (ii)

Dead end locations, (iii) Tee-off points, (iv) Steep gradient locations to avoid uplifted

on the poles.

The installation of guy will involve the following works:

i) Excavation of pit and fixing of stay rod.

ii) Fastening guy wire to the support.

iii) Tightening guy wire and fastening to the anchor



The marking of the guy pit for excavation, the excavation of pits and setting of the

anchor rod must be carefully carried out. The stay rod should be placed in the position

such that the angle of inclination of the rod with the vertical face of the point is 30°/45°

as the case may be. The concreting of the stay at the bottom should then be carried out.

The back filling and ramming must be well done thereafter, and allowed to set for at

least 7 days. The free end of the guy wire is passed through the eye of the anchor rod,

bent back parallel to the main portion of the guy and bound after inserting the G.I.

Thimble. The loop is protected by the G.I. Thimble, where it bears on the anchor rod.

Where the existence of guy wire proves hazardous, it should be protected with suitable

asbestos pipe, filled with concrete of about 2 mts length above the ground level, duly

painted with white and black stripe so that it may be visible at night. The turn buckle

shall be mounted at the pole end of the stay and guy wire so fixed that the eye bolt turn

buckle is half way in the working position, thus giving the maximum movement for

tightening or loosening.

Guy insulators are placed to prevent the lower part of the guy from becoming

electrically energized by a contact of the guy when the conductors snap and fall on

them of due leakage. No guy insulator shall be located less than 2.6 mts. from the

ground.

The anchoring and providing guys for supports (Single guy Bow guy fly guy) shall be

done as per sketch enclosed. Bow guy and fly guy shall be provided as per field

conditions.

9.0 FIXING OF CROSS ARMS INSULATORS

After the erection of supports and providing guys, the next step would be to mount the

cross arms on the support erected. The lineman should climb the support having

requisite tools with him and the cross arm is then tied to a hand line and pulled up by the

ground man and should station himself well to one side so that if any material drops

from the top of the pole it may not strike him. All the materials required should be lifted

or lowered by means of the hand line. In no case, the materials of the tools should be

dropped or thrown from the pole top.

The fixing of 33 KV, 11 KV and LT Cross arms shall be in accordance to spacing

detailed in Sketch. G.I. bolts and nuts and spring washers of good quality only shall be

used which will have to be procured by the contractor.

9.1 Back Clamps

The back clamps for fixing of the seating channels, “V” cross arms, horizontal

cross arms and top cleats will have to be procured by the contractor and shall be

in accordance with sketch enclosed and the clamp shall be fabricated with 75 X

8 mm M.S. Flat for 33 KV and 50 X 8 mm M.S Flat for 11 KV and LT.

9.2 Top Cleats

The top cleats shall be got fabricated with M.S. Channel of size 75 X 40 mm for

33 KV and 11 KV and shall be in accordance with sketch enclosed..



10.0 INSULATORS

The pins for insulators shall be fixed in the holes provided in the cross arms and the

pole top brackets. The insulators shall be mounted in their places over pins and

tightened. In the case of strain or angles supports, where strain fittings are provided

for this purpose, one strap of the strain fitting is placed over the cross arm before

placing the bolts in the hole of the cross arms. The nut of the strap is so tightened

that the strap can move freely in horizontal direction, as this is necessary to fix the

strain insulator.

The insulator shall be cleaned and examined for defects before fixing, it shall be

ensured that all the current carrying parts are smooth and without dirt, cracks or

chips.

11.0 STRINGING OF THE LINE CONDUCTORS

11.1 For the guidance of the contractor certain do’s and don’ts are given below before the

workmen actually commence the stringing work.

11.2 Do’s and Don’ts

DO’s

i. Use proper equipment for handling aluminum conductors at all times.

ii. Use skids, or similar method for lowering reels or coils from

transport or ground.

iii. Examine reel before unreeling for presence of nails or any other

object, which might damage the conductor.

iv. Rotate the reel or coil while unwinding conductor.

v. Grip all strands while pulling out the conductor.

vi. Control the unreeling speed with suitable braking arrangement.

vii. Use wooden guards of suitable braking arrangement.

viii. Use long straight, parallel jaw grip with suitable liners when pulling

conductor thus avoiding nicking or kinking of the conductor.

ix. Use free running sleeves or blocks with adequate grooves for

drawing/paving conductors.

x. Use proper sag charts.

xi. Mark conductors with crayons or adhesive tape of such (other)

material, which will not damage the strand.

xii. Make all splicing with the proper tools.

xiii. Use a twisting wrench for twisting the joints.

xiv. Chromite or graphite conducting oxide-inhibiting grease should be

used before cleaning with wire brush.

DON’Ts

i. Do not handle conductors without proper tools at any stage.

ii. Do not pull conductors without ensuring that there are no

obstructions on the ground.

iii. Do not pull out excess quantity of conductor than is required.

iv. Do not make jumper connections on dirty or weathered conductor.



v. Do not handle aluminum conductors in a rough fashion but handle it

with care it deserves.

11.3 CONDUCTOR ERECTIONS

The erection of overhead line conductor is a very important phase in construction.

The erection of conductors can be sub-divided into 4 separate parts as follows:

i. Transport of conductors to work site.

ii. Paving and stringing of conductors.

iii. Tensioning and sagging of conductors.

iv. Joining of conductors.

At the important crossing of roads, canals, navigable rivers, railways etc., flagmen

should be in attendance to ensure that normal services are not unduly interrupted.

These crossing should only be carried out in conjunction with and with the approval

of the proper authorities concerned.

The conductor drums shall be transported to the tension point without injuring the

conductor, if, it is necessary to roll the drum on the ground for a small distance, it

should be slowly rolled in the direction of the marked on the drum. The drum should

be so supported that it can be rotated freely. For this purpose the drum should either

be mounted on the cable drum supports of jacks or hung by means of chain pulley of

suitable capacity, suspended from a tripod. In case if it is not possible to raise the

conductor drum by any of the above method, a trench of suitable depth slightly

bigger than the conductor drum may be dug, so as to facilitate free rotation of the

cable drum when it is suspended in the trench by means of M.S. Shaft. While

paving, care should be taken to see that conductor does not rub against any metallic

fitting of the pole or on the bad/rocky ground. Wooden trusses should be used for

this purpose to support the conductor. The conductor should be passed over the

poles on wooden or aluminum snatch pulley blocks provided with low friction

bearings. While conductor is being paved out slowly, some braking arrangement

should be made so that the rotation of the drum may be stopped in emergency.

In case the length of one piece of the conductor is less than the length of the section

in which conductor paving is being done, it is easy to stretch one length of all phases

from one end the remaining length from another end of the section any part of the

conductor shall be left at a height of less than that of 5 meters, above the ground by

rough sagging.

11.4 Mid Span Jointing of Conductors

The mid span jointing of conductors can be carried by twisting the joint at the ends

and the wire should project a few centimeter, beyond the end of the sleeves. The

projected wires are given a sharp bend to keep them from slipping out of the sleeve.

The end of the sleeves are then held tightly by twisting wrenches and then 4 to 5

turns in one direction generally anti-clock wise direction. Crimping Tools are

preferably to be used for joints and jumpers.

11.5 SAGGING AND TENSIONING



On the completion of the paving of the conductors and making mid span joints if

any, tensioning operations will commence. Temporary guys will have to be provided

for both the anchoring supports in the section where the stringing has to be done. At

the tensioning end, one of the conductors is pulled manually up to a certain point

and then come along clamp is fixed to the conductor to be tensioned. The grip to the

come along clamp is attached to double sleeve pulley block or the pulley lift

machine and gradually tensioned.

The conductor should then be sagged in accordance with the sag temperature chart

for the particular conductor and span. The sag should then be adjusted in the middle

span of the section. The sag chart is to be provided. The stretch of the conductor has

to be taken out before stringing in order to avoid the gradual increase in sag due to

the setting down of the individual wires. There are ways of accomplishing this:

a) Pre-stressing

In this method the conductor is pulled up to tension considerably above the correct

figures, but never exceeding 50% of breaking load for a short period of say twenty

minutes. As this method requires more time and involves the use of stronger tackle

to secure the higher tension the other method of over tensioning is commonly

adopted.

b) Over-tensioning

This method consists of pulling up the conductor to a tension a little above the

theoretical tension for prevailing temperature and fixed it up at that tension with

correspondingly reduced sag. After a certain time the conductor will settle down to

the correct sag and tension. A tension of five to eight percent more than the

theoretical value has been found to be suitable for the sizes of ACSR and AAAC

conductors standardized by REC. The ambient temperature during sagging may be

recorded correctly.

Conductors can be sagged correctly only when the tension is the same in each span

throughout the entire length of section. Use of snatch blocks reduces the friction and

chances of inequality of tension in various spans.

Sagging can be accomplished by several different methods but most commonly used

method is “Slighting”. The slighting sag method of measuring sag is by the use of

targets placed on the supports below the cross arms. The targets may be light strip of

wood clamped to the pole at a distance equal to the sag below the conductor when

the conductor is placed in snatch block. The lineman sees the sag from the next pole.

The tension of the conductor is then reduced or increased, until the lowest part of the

conductor in the span coincides with the lineman’s line of sight.

When sagging is completed, the tension clamps shall be fixed. The clamp can be

fitted on the conductor without releasing the tension. A mark is made on the

conductor at a distance from the cross-arm equal to the length of complete strain

insulator. Before the insulator set is raised to position, all nuts should be free. Come

along clamp is placed on the conductor beyond the conductor clamp and attached to

the pulling unit. The conductor is pulled in sufficiently to allow the insulator



assembly to be fitted to the clamp. After the conductor is clamped to insulator,

assembly unit may be released gradually.

If the tension is released with a jerk, an abnormal stress may be transferred to

conductor and support, which may result in the failure of the cross arm, stay or pole

in some cases. After the stringing is completed, all poles, cross arms, insulators,

fittings etc. are checked upto ensure that there have been no deformities etc.

The next step is to place the conductor on the top of the pin insulator from the snatch

block and removing snatch blocks. Conductors are then fastened to insulator by the

use of aluminum wires. The following points should be observed:

i) Proper size of the tie binding wire which can be readily handled and with

adequate strength is to be used.

ii) The length of tie wire should be sufficiently long for making complete tie

including the end allowances for gripping with ends.

iii) A good tie should provide a secure binding between the line conductor and

insulator and should reinforce the conductor on either side of the insulator.

iv) The use of cutting pliers for binding the tie wire should be avoided.

v) The tie wire which has been used previously should be reused

Before tying the conductor to the insulator two layers of Aluminum tapes should be

wrapped over the conductor in the portion where it touches the insulator. The width

and thickness of aluminum tape to be used for a specific size of conductors has been

specified in hand books of aluminum conductor manufacturers and the same be

referred to. The Aluminum tapes should also be used at the tension clamp and for

proper grip.

Normally in straight runs of line, the conductors are run on the top of insulators.

When there is small of deviation the conductor is placed inside groove and bound.

Accordingly, there are two methods of tying the conductors to insulators. The

binding wire/tie wire has to be procured by the contractor and the bid price shall

include the cost of this.

11.6 The contractor shall be entirely responsible for any damage to the supports, other

accessories and conductor. He shall also be responsible for proper distribution of the

conductor drums to keep number and lengths of cut pieces of the conductor to a

minimum.

11.7 CONDUCTOR DAMAGE AND REPAIR

If the conductor is damaged for whatever reasons, and damage is not repaired by

aluminum sleeves, etc., it shall be brought to the notice of the Engineer and shall not

be used without his approval. Even repairing of conductor surfaces shall be done

only in case of minor damages, scuff marks etc., which are safe from both electrical

and mechanical points of view. The final; conductor surface shall be clean, smooth,

without any projection sharp points, cut or abrasion etc. giving satisfactory corona

and R.I. performance.



11.8 No joints or splice be made in span’s crossing over main roads, railways, small rivers

or intension spans. Not more than one joint per conductor shall be allowed in one span.

The strength of the joint shall conform to IE Rule 75.

11.9 STRINGING.

Whatever necessary ground clearances have to be measured to ensure obtaining

adequate line clearance as per IE Rule 77 (i)

12.0 EARTHING

12.1 Pipe Earthing

At D.P Locations, Pits are to be excavated the steel and metal parts are to be earthed

by pipe earthing as per the drawing or sketch enclosed to this specification. Duly

filling the pits with finely broken coke having granule sizes not more than 25 mm

thick. The coke shall be maintained up to a distance of 300 mm for the pipe on all

sides. The top edge of the pipe shall be at least 200 mm below the ground level. The

CI strips shall be fixed not less than 300 mm deep from the ground level.

The tenders shall quote the charges for earthing inclusive of the cost of coke,

excavation and back filling.

12.2 Pole Earthing: Supports shall be properly earthed.

13.0 CONCRETING

13.1 The cement concrete used for the foundations shall be of M 400 grade.

13.2 The full concreting for the poles if erected in excavated act shall be done

so that the complete block will be of dimensions( 0.6 X 0.6 X 1.6) + 0.2

X 0.2 Mtr. (0.6 X 0.6 X 1/35) + 0.2 X 0.2 X 0.2 Mtrs. so as to maintain

as exposed portion for 0.2 Mtrs height above the ground level.

13.3 If augur is used for making pole pits, ramming shall be done after

erection of pole.

14.0 WORKMANSHIP

The contractor shall entirely be responsible for correct erection of all support as per

the approved drawings, and their correct setting and alignment, as approved by the

engineer. If the supports and D.P. structures after the erection are found to differ

from approved route maps and drawings or to be out of alignment, the contractor

shall dismantle and re-erect them correctly at his own cost without extension of

time. The supports must be truly vertical and in plumb after erection and no straining

will be permitted to bring them to vertical position. Verticality of each support shall

be measured by the contractor and furnished to the Engineer.



15.0. Location numbers for each pole shall be painted on the pole.

Anti-climbing devices, and danger boards are to be provided at all railway crossings

and road crossings. No extra charges shall be admissible even though separate gangs

may have to be sent by the contractor for fitting these accessories and attachments

on the support at the appropriate time.

16.0. FINAL CHECKING, TESTING AND COMMISSIONING

After the completion of the work final patrolling and checking of the line shall be

done by the contractor to ensure that all foundations work, pole erection and

stringing have been done as approved by the Engineer, and also to ensure that they

are completed in all respects. Contractor shall prepare pole schedules and hand it

over to the Engineer. All works shall be thoroughly inspected keeping in view of the

following main points.

i) Sufficient back filled earth is lying over each foundation pit and it is

adequately compacted.

ii) Concreting and coping of poles are in good and finally shaped conditions.

iii) All the accessories and insulators are strictly as per drawings and are free

from any defects or damages, what-so-ever.

iv) All the bolts and nuts should be of G.I material and as per contractual

provisions.

v) The stringing on the conductor has been done as per approved sag and

desired clearances are available.

vi) No damage, minor or major to the conductor, earth wire, accessories and

insulator strings still unattended are noticed.

vii) For all points double jumpers shall be provided to each phase. The jumpers

provided at the cut points are connected rigidly to the tension hardware

utilizing all the jointing bolts provided for the purpose.

The contractor shall submit a report to the above effect to the Engineer. In case, it is

noticed later that some or any of the above are not fulfilled the Engineer will get

such items rectified through other agencies and recover the cost of such works from

the bills payable to the contractor against that contract or any other contract executed

by him for APDCL(CAZ).

After final checking, the lines shall be tested for insulation in accordance with tests

prescribed by the Engineer. All arrangements for such testing or any other tests

desired by the Engineer shall be done by the Contractor and necessary labour,

transport and equipment shall be provided by him. Any defects found out as a result

of such tests, shall be rectified by the Contractor, forthwith, without any extra

charges to APDCL(CAZ).

In addition to the above, the Contractor shall be responsible for testing and ensuring

that the total and relative sags of the conductors are within the specified tolerance.

Such tests shall be carried out at selected points along the route as required by the

Engineer and the Contractor shall provide all necessary equipment and labour to

enable the tests to be carried out.



The APDCL(CAZ) will arrange statutory inspection of the line and indicate the

defects noticed. The Contractor has to rectify all such defects and intimate to

APDCL(CAZ) Engineer.

After satisfactory tests on the line and an approval by the Engineer the line shall be

energized at full operating voltage before handing over.

17.0. SUPPLY OF CONSTRUCTION MATERIALS BY THE

CONTRACTOR

The Contractor has to make his own arrangements for procurement, supply and use

of construction materials like cement, M.S. rounds, HBG metal and sand.

17.1. CEMENT

The contractor has to make his own arrangements for the procurement of cement to

require specifications required for the work subjected to the follows:

a) The contractor shall procure cement, required for the works only from reputed

cement factories (Man producer) acceptable to the Engineer-in-Charge. The

contractor shall be required to be furnished to the Engineer-in –Charge bills of

payment and test certificates issued by the manufacturers to authenticate

procurement of quality cement from the approved cement factory. The contractor

shall make his own arrangement for adequate storage of cement.

b) The contractor shall procure cement in standard packing of all 50 kg per bag from

the authorized manufactures. The contactor shall make necessary arrangement at his

own cost to the satisfaction of Engineer-in-Charge for actual weighment of random

sample from the available stock and shall conform to the specification laid down by

the Indian Standard Institution or other standard foreign institutions as the case may

be. Cement shall be got tested for all the tests as directed by Engineer-in-Charge at

least one month in advance before the use of cement hags brought and kept on site

Godown. Cement bags required for testing shall be supplied by the contractor free of

cost. However, the testing charges for cement will be borne by the APDCL(CAZ). If

the tests prove unsatisfactorily, then the charges for cement will be borne by the

contractor.

c) The contractor should store the cement of 60 days requirement at least one month

in advance to ensure the quality of cement so brought to site and shall not remove

the same without the written permission of the Engineer-in-Charge.

The contractor shall forthwith remove from the works area any cement that the

Engineer-in-Charge may disallow for use, an account of failure to meet with

required quality and standard.

d) The contractor shall further, at all times satisfy the Engineer-in-Charge on

demand, by production of records and books or by submission of returns and other

proofs as directed, that the cement is being used as rested and approved by Engineer-

in-Charge for the purpose and the contractor shall at all times, keep his records upto

date to enable the Engineer-in-Charge to apply such checks as he may desire.



e) Cement which has been unduly long in storage with the contractor or

alternatively has deteriorated due to inadequate storage and thus become unfit for

use in the works will be rejected by the department and no claim will be entertained.

The contractor shall forthwith remove from the work area, any cement the Engineer-

in-Charge may disallow for use on work and replace it by cement complying with

the relevant Indian Standards.

17.2. STEEL

The contractor shall procure mild steel reinforcement bars, high yield strength

deformed(HYSD) bars, rods and structural steel etc. required for the works only

from the main or secondary producers manufacturing steel to the prescribed

specifications of Bureau of Indian Standards or equivalent and licensed to affix ISI

or other equivalent certification marks and acceptable to the Engineer-in-Charge.

Necessary ISI list certificates are to be produced to Engineer-in-Charge before use

on works. The unit weight and dimensions shall be as prescribed in the relevant

Indian Standard specification for steel.

18.0. INFORMATION AND DATA

a) The information furnished is the best available however, the APDCL(CAZ) does

not guarantee the correctness of interpretations, deductions or conclusions which

are given as supplementary information in the Bid Documents or in any reports,

maps, drawings, diagrams or in other reference information available to the

bidder from APDCL(CAZ) of or otherwise.

The information has been produced as found, communicated to ascertained or

otherwise/learned by the APDCL(CAZ).

b) it will be the Bidder’s responsibility to satisfy himself from the “Reference

Information” supplied and or inspection of the site that sufficient quantities of

construction materials required for the works shall exist in the designated borrow

areas or quarry sites.

The APDCL(CAZ) does not accept any responsibility either in handing over the

quarries or procuring the materials or any other facilities. The Tenderer will not

be entitled for any extra rate or claim for the misjudgment on his part for the

quantity and quality of materials available in the quarries.

Failure by the Bidder to have done all the timings which is in accordance with

this condition he is deemed to have done shall not relieve the successful Bidder

of the responsibility for satisfactorily completing the work as required at the

rates quoted by him.



2.0 TECHNICAL SPECIFICATION FOR POLES OF : 33 KV

OVERHEAD POWER LINES

1.0 SCOPE

This covers supply of poles, insurance, storage, erection and commissioning of poles.

1.1 GI TUBULAR POLE

SP-76, 14.50 metre length seamless straight( Sweged type) tubular pole

manufacturing out form the electrically welded pipe in three sections having base

plate of size 400mm x 400 mm x 10mm at the bottom of the pole and pole cap at the

top of the pole. The inner side and outer underground portion of the pole is to be

painted black bituminous paint. The balance outer portion of the pole(i.e. 12.00 mtr)

is to be painted with 2 coats of metal primer and 2 coats of aluminium paint.

The pole is erected in 1:2:4 RCC foundation of size 2.50m x50 cm x50 cm having a

PCC base foundation of size 15 cm x 60 cm x 60 cm including edge brick soling and

plastering above G.L. portion complete with excavation of trances, handling of surplus

soil, debris etc. to the proper place and refilling etc. as specified and directed by the

department.

COMPRISING OF FOLLOWING SPECIFICATION OF POLE

Specification:

a) IS-2713( Part-II) 1980 or amended from time to time .

b) Type-410 SP-76.

c) Size of section.

d) Weight of pole with base plate and arim= 380 Kg( Approx.)

e) Planting depth= 2.00 mtr.

Dia Thickness Length of Section

219.10 mm 5.90 mm 6.50 mtr( bottom)

193.70 mm 4.85 mm 4.00 mtr( Middle)

165.10 mm 4.50 mm 4.00 mtr( Top)

f) Type-410 SP-66.

g) Size of section.

h) Weight of pole with base plate and arim= 322 Kg( Approx.)

i) Planting depth= 2.00 mtr.

Dia Thickness Length of Section

219.10 mm 5.90 mm 5.8 mtr( bottom)

193.70 mm 4.85 mm 3.10 mtr( Middle)

165.10 mm 4.50 mm 3.10 mtr( Top)



Pole Clamp

The pole clamp is to made from MS Flat of size 40mm x 6 mm with necessary drilling

of holes and painting with primer and anti-corrosive aluminium paint suitable for steel

tubular pole of Size SP-76 & SP-66.

Nuts & Bolts & Ring washer

The MS Nuts and Bolts and washer should be of different sizes as require in site.

PCC POLES

2.1 SCOPE

This covers design manufacturing, testing at works, transport to site, insurance, storage,

erection and commissioning of PCC poles shall be of solid rectangular and Virendeel type

with an overall length of 7.5M, 8.50M, 9.75M and suitable for use in overhead 33KV

and11 KV lines, L T lines and double pole structures for 11/0.433 kV substations.

2.2 Applicable Standards

Except when they conflict with specific requirements in this Specific ht: 8nm, the psc poles

shall comply with the relevant provisions mentioned' in the' following Indian Standards or

the latest versions thereof.

a) IS: 1678, Specification for pre-stressed concrete poles for overhead power, traction and

telecommunication lines.

b) IS: 2905, Method of test for concrete poles for overhead power and telecommunication

lines.

c) IS: 7321, Code of Practice for selection, handling and erection of concrete poles for

overhead power and telecommunication lines.

2.3 Terminology

.3.1. For the purpose of this specification, following definitions shall apply:

.3.1.1. Average Permanent Load

That fraction of the working load which may be considered of long duration over a

period of one year.

.3.1.2. Load Factor

The ratio of ultimate transverse load to the transverse load at first crack.

.3.1.3. Transverse



The direction of the line bisecting the angle contained by the conductor at the pole. In

the case of a straight run, this will be normal to the run of the line.

.3.1.4. Transverse Load at First Crack

For design, the transverse load at first crack shall be taken as not less than the value of

the working load.

.3.1.5. Working Load

The maximum load in the transverse direction, that is ever likely to occur, including the

wind pressure on the pole. This load is assumed to act at a point· 600 mm below the top

with the butt end of the pole planted to the required depth as intended in the design.

.3.1.6. Ultimate Failure

The condition existing when the pole ceases to sustain a load incrementowing to either

crushing of concrete, or snapping of the pre-stressing tendon or permanent stretching of

the steel in any part of the pole.

.3.1.7. Ultimate Transverse Load

The load at which failure occurs, when it is applied at a point 600 mm below the top and

perpendicular to the axis of the pole along the transverse direction with the butt end of

the pole planted to the required depth as intended in the design.

2.4 Application

2.4.1 9.75 M

These poles shall be used for 33 kV lines, and for special locations in 11 kV lines, such as

road crossings, etc.

2.4.2 For use in cyclone affected Coastal areas, or in areas with higher wind pressures than

indicated in Clause 2.4.2, special designs of poles would have to be evolved for such areas.

2.5 Material

2.5.1 Cement

The cement used in the manufacture of pre-stressed concrete poles shall be ordinary or rapid

hardening Portland cement conforming to IS: 269 (Specification for ordinary and low heat

Portland cement) or IS: 8041 E (Specification for rapid hardening Portland cement), or high

strength ordinary Portland cement conforming to IS: 8112 (Specification of high strength

ordinary Portland cement).

2.5.2 Aggregates

Aggregates used for the manufacture of pre-stressed concrete poles shall confirm to IS: 383



(Specification for coarse and fine aggregates from natural sources for concrete). The

nominal maximum size of aggregates shall in no case exceed 10 mm (for poles above 9.0

M) .

2.5.3 Water

Water should be free from chlorides, sulphates, other salts and organic matter, Potable

water will be generally suitable.

2.5.4 Admixture

Admixture should not contain Calcium Chloride or other chlorides and salts which are

likely to promote corrosion of pre-stressing steel.

2.5.5 Pre-stressing Steel

,

The pre-stressing steel wires including those used as un-tensioned wires (See Annexure. I, II & III), should conform to IS: 1785 (part-I) (Specification for plain hard-drawn steel wire for pre-stressed concrete. Part-I cold drawn stress relieved wire), IS: 1785 (part-II) (Specification for plain hard-drawn steel wire) or IS: 6003 (Specification for indented wire for pre-stressed concrete). The type designs given in Annexure-I, II and III are for plain wires of 4 mm diameter with a guaranteed ultimate strength of 175 kg/mm2.

2.5.6 The concrete mix shall be designed to the requirements laid down for controlled concrete

(also called design mix concrete) in IS: 1343 (Code of practice for pre-stressed concrete)

and IS: 456 (Code of practice for plain and reinforced concrete), subject to the following

special conditions:

a) Maximum works cube strength at 28 days should be at least 400 kg/cm2 (for poles above 9.0

M) .

b) The concrete strength at transfer should be at least 200 kg/cm2 (for poles above 9.0 M) .

c) The mix should' contain at least 380 kg of cement per cubic meter of concrete.

d) The mix should contain as Iowa water content as is consistent with adequate workability. If

it becomes necessary to add water to increase the workability, the cement content also

should be raised in such a way that the original value of water cement ratio is maintained.

2.6 DESIGN REQUIREMENTS

The poles shall be designed for the following requirements:

a) The poles shall be planted directly in the ground with a planting depth as per IS:

1678.

b) The working load on the poles should correspond to those that are likely to come on the

pole during their service life. Designs given in Annexure I,ll and III are for 140 kg, 200

kg, 300 kg, and 400 kg., applied at 0.6 M from top.



c) The factor of safety for all poles above 9.0 M shall not be less than 2.0. For 7.5 M and

8.5 M poles, the factor of safety shall not be less than 2.5.

d) The average permanent load shall be 40% of the working load.

e) The F.O.S. against first load shall be 1.0.

f) At average permanent load, permissible tensile stress in concrete shall be 30 kg/cm2.

g) At the design value of first crack load, the modulus of rupture shall not exceed 53.0

kg/cm2 for M-400 concrete and 55.2 kg/cm2 for M-420 concrete.

h) At the design value of first crack load, the modulus of rupture shall not exceed 53.0

kg/cm2 for M-400 concrete.

i) The ultimate moment capacity in the longitudinal direction should be at least one fourth of

that il1 the transverse direction.

j) The maximum compressive stress in concrete at the time of transfer of pre-stress should not

exceed 0.8 times the cube strength.

k) The concrete strength at transfer shall not be less than half the 28 days strength ensured in

the design, i.e., 400 x 0.5 = 200 kg/cm2 or 420 x 0.5 = 210 kg/cm2.

2.6.1 Service Conditions

PSCC poles have to be designed to suit the following climatic conditions:

a) Maximum temperature of air in shade 40°C

b) Minimum temperature of air in shade 2°C

c) Maximum temperature of air in sun 45°C

d) Maximum humidity 93%

e) Average number of thunder storm days per 45 Days

annum

f) Maximum rainfall per annum 3500 mm

g) Average rainfall per annum 2200 mm

h) Wind pressure 97.8 Kg/m2

i) Altitude above MSL 100 M to 1000 M

2.6.2 Dimensions and Reinforcements

The cross-sectional dimensions and the details of pre-stressing wires should conform to the particulars given in Annexure-I, II and III.

The provisions of holes for fixing cross-arms and other fixtures should conform to the REC standards referred to in clause 3.3 of this specification.



2.0.3 Manufacture

2.0.3.1 Attire--stressing wires and reinforcements shall be accurately fixed as shown in drawings

and maintained in position during manufacture. The un-tensioned reinforcement, as

indicated in the drawings, should be held in position by the use of stirrups which should go

round all the wires.

2.6.3.2 AII wires shall be accurately stretched with uniform pre-stress in each wire. Each wire or a

group of wires shall be anchored positively during casing. Care should be taken to see that

the anchorages do not yield before the concrete attains the necessary strength.

2.6.4. Cover

The cover of concretE1 measured from the outside of pre-stressing tendon shall be normally

20 Nm.

2.6.5. Welding and Lapping of Steel

The high tensile steel wire shall be continuous over the entire length of the tendon. Welding

shall not be allowed in any case. However, jointing or coupling may be permitted provided

the strength of the joint or coupling is not less than the strength of each individual wire.

2.6.6. Compacting

Concrete shall be compacted by spinning, vibrating, shocking or other suitable mechanical

means. Hand compaction shall not be permitted.

2.6.7. Curing

The concrete shall be covered with a layer of sacking, canvass, Hessian or similar absorbent

material and kept constantly wet up to the time when the strength of concrete is at least

equal to the minimum strength of concrete at transfer of pre-stress. Thereafter, the pole may

be removed from the mould and watered at intervals to prevent surface cracking of the unit,

the interval should depend on the atmospheric humidity and temperature.

The pre-stressing wires shall be detensioned only after the concrete has attained the

specified strength at transfer (i.e., 200 or 210 kg/cm2 as applicable). The cubes cast for the

purpose of determining the strength at transfer should be cured, as far as possible, under

conditions similar to those under which the poles are cured. The transfer stage shall be

determined based on the daily tests carried out on concrete cubes till the specified strength

indicated above is reached. Thereafter the test on concrete shall be carried out as detailed in

IS: 1343 (Code of pr3ctice for pre-stressed concrete). The manufacturer shall supply, when

required by the owner or his representative, result of compressive test conducted in

accordance with IS: 456 (Code of practice for plain and reinforced concrete) on concrete

cubes made from the concrete used for the poles. If the owner so desired, the manufacturer

shall supply cubes for test purposes and such cubes shall be tested in accordance with IS:

456 (Code of practice for plain and reinforced concrete).

The detensioning shall be done by slowly releasing the wires, without imparting shock or

sudden load to the poles. The rate of detensioning may be controlled by any suitable means

either mechanical (screw type) or hydraulic.

The poles shall not be detensioned or released by cutting the pre-stressing wires using



flames or bar croppers while the wires are still under tension.

2.6.8. Separate eye-hooks or holes shall be provided for handling the transport, one each at a

distance of 0.15 times the overall length, from either end of the pole. Eye-hooks, if

provided, should be properly anchored and should be on the face that has the shorter

dimension of the cross-section. Holes, if provided for lifting purposes, should be

perpendicular to the broad face of the pole.

Stacking should be done in such a manner that the broad side of the pole is vertical.

Each tier in the stack should be supported on timber sleeper located as 0.15 times the

overall length, measured from the end. The timber supported in the stack should be

aligned in a vertical line.

Poles should be transported with their broad faces placed vertically and, in such a

manner that the shocks are avoided. Supports should be so arranged that they are

located approximately at a distance equal to 0.15 times the overall length from the ends.

The erection of the pole should be carried out in such a way that the erection loads are

applied so as to cause moment with respect to the major axis, i.e., the rope used for

hoisting the pole should be parallel to the broader face of the pole.

2.6.9. Earthing

2.6.9.1 Earthing shall be provided by having length of 8 SWG GI wire embedded in concrete during manufacture and the ends of the wires left projecting from the pole to a length of 100 mm at 250 mm from top and 150 mm below ground level.

2.6.9.2 Earth wire shall not be allowed to come in contract with the pre-stressing wires.

2.7 Tests

2.7.1 Transverse Strength Test

2.7.1.1 Poles made from ordinary Portland cement shall be tested only on the completion of 28 days and poles made from rapid hardening cement only on the completion of 14 days, after the day of manufacture.

2.7.1.2 The poles may be tested in either horizontal or vertical position. If tested in horizontal position, provisions shall be made to compensate for the overhanging weight of the pole, for this purposed, the overhanging portion of the pole may be supported on a movable trolley or similar device.

2.7.1.3 The pole shall be rigidly supported at the butt end for a distance equal to the agreed

depth of planting.

2.7.1.4 Load shall be applied at a point 600 mm from the top of the pole and shall be steadily and

gradually increased to the design value of the transverse load at first crack. The deflection at

this load shall be measured.

A pre-stressed concrete pole shall be deemed not to have passed the test if visible cracks

appear at a stage prior to the application of the design transverse load for the first crack.

The load then be reduced to zero and increased gradually to a load equal to the first crack

load plus 10% of the minimum ultimate transverse load, and held up for 2 minutes. This



procedure shall be repeated until the load reaches the value of 80 per cent of the minimum

ultimate transverse load and thereafter increased by 5 per cent of the minimum ultimate

transverse load until failure occurs. Each time the load is applied, it shall be held for 2

minutes. The load applied to pre-stressed concrete pole at the point of failure shall be

measured to the nearest five Kilograms.

The pole shall be deemed not to have passed the test if the observed ultimate transverse load

is less than the design ultimate transverse load.

2.7.1.5 Measurement of Cover

After completion of the transverse strength test, the sample pole shall be taken and checked

for cover. The cover of the pole shall be measured at 3 points, one within 1.8 meter from the

butt end of the pole. the ·second within 0.6 meters from the top and the third at an

intermediate point and the mean value compared with the specified value.

The mean value of the measured cover should not differ by more than (±) 1 mrn from the

specified cover. The individual values should ;Jot jiffer by more than (±) 3 mm from the

specified value.

If these requirements are not met, the workmanship with reference to aligning of the end

plates and pre-stressing wires and assembly of moulds should be improved and inspection

at pre-production stage tightened suitably.

3.0 MARKING

The pole shall be clearly and indelibly marked with the following particulars either during

or after manufacture but before testing at a position so as to be easily read after erection in

position.

a) Month and year of manufacture

b)Transverse strength of pole in Kg

4.0 INSPECTION

Inspection may be carried out by the purchaser or third party nominee at any stage of

manufacture. The supplier shall grant free access to the purchaser's representative or

third party nominee at a reasonable time when the work is in progress. Inspection and

acceptance of any equipment under this specification by the purchaser shall not relieve

the supplier of his obligation of furnishing equipment in accordance with the

specification and shall not prevent subsequent rejection if the equipment is found

defective.



ECONOMICAL DESIGN FOR VIRENDEEL TYPE PRESTRESSED CONCRETE POLES

Factor of safety = 2.5 Diameter of Prestressing

Wires = 4 mm Cost Ratio = 11 With a Minimum Ultimate Tensile Strength of

175 Kg/mm Sq. Concrete Grade = M-420

Length of Pole

Load

Bottom

Depth

Breadth

Top Depth

No. of Tension

ed Wires

per Pole

No. of Untensio

ned Wires

per Pole

Length of each

Untensioned Wire Concrete Quantity

Concrete Quantity

Steel Quantity

(L) (P) (dt) (B) (lc) Cubic M

Kg/Pole

M Kg Cm I 2 3 4 5 6 7 8 9 10

7.5 140 25.5 10.5 8.5 8 2 4.55 0.115 6.81 200 27.5 14.5 8.5 12 2 3.75 0.134 9.61

8.0 140 27.5 10.5 9 8 2 4.7 0.137 7.24 200 29 14.5 9.0 12 2 3.95 0.157 10.25

9.0 140 27 10.5 10 10 2 4.5 0.169 9.76 200 31.5 11.5 10.5 12 2 4.45 0.203 11.54

Note: 1. Untensioned wires of the given length should be placed at the bottom of the pole

Cost of one MT of pre-stressing steel 2.Cost ration =

Cost of one cubic m of concrete



ECONOMICAL DESIGN FOR VIRENDEEL TYPE PRESTRESSED CONCRETE POLES

Factor of safety = 2.0 Nos. of Windows = 4 Cost Ratio = 11 Concrete Grade = M-400

Sl.No

Overall

Length

of Pole

Bottom

Depth

Top

Depth Breadth

Thicknes

s

Thickn

ess

Diamete

r of Pre-

stressing

wires

No. of

Tensione

d Wires

per Pole

No. of

Untensio

ned

Wires

per Pole

Length

of Each

Untensi

oned

Wires

Concrete

Quantity

Steel

Quantity

Weight

Kg/Pole

M Kg Cm Cm Cm Cm M M/Pole Kg/Pole Kg/Pole

1 2 3 4 5 6 7 8 9 10 11 12 13 14

1 9.75 300 39.5 11.0 12.5 7.0 5 8 2 5.62 0.205 12.82 490

2 9.75 400 48.0 11.0 14.5 7.0 5 ,8 2 6.45 0.255 13.06 610

3 9.5 200 37.5 10.5 12.5 6.5 5 8 2 6.53 0.208 8.78 500

4 9.5 300 41.0 11.0 12.5 7.0 5 8 2 6.14 0.225 13.60 540

5 9.5 400 50.0 11.0 15.0 7.0 5 8 2 6.96 0.291 13.85 700



ECONOMICAL DESIGN FOR SOLID RECTEANGULAR TYPE PRESTRESSED CONCRETE POLES

Factor of safety = 2.0 Cost Ratio = 11 Concrete Grade = M-400

Sl.No

Overall

Length

of Pole

Bottom

Depth

Top

Depth Breadth Thickness

Diameter of

Pre-stressing

wires

No. of

Tensione

d Wires

per Pole

Concrete

Quantity

Steel

Quantity

Weight

Kg/Pole

M Kg Cm Cm Cm M/Pole Kg/Pole Kg/Pole

1 2 3 4 5 6 7 8 9 10 11

1 9.0 200 31.5 14.5 8.5 4 12 0.176 10.65 425

2 9.0 300 35.5 18.5 10.0 4 16 0.243 14.20 585

3 9.0 400 39.5 22.5 10.0 4 20 0.279 17.76 670

4 9.5 200 31.5 14.5 10.0 4 12 0.218 11.25 525

5 9.5 300 36.5 18.5 10.0 4 16 0.261 14.99 625

6 9.5 400 40.5 22.5 10.0 4 20 0.299 18.74 720


_________________________________________________________________________

3.0 TECHNICAL SPECIFICATION FOR ALUMINUM ALLOY

CONDUCTORS (AAAC) FOR OVRHEAD POWER LINES

1.0 Scope

This specification covers design, manufacture, testing at works, transport,

insurance, storage, erection and commissioning of All Alluminium Alloy Stranded

Conductors at site in 33 KV, 11 KV and LT overhead lines.

2.0 Conductor Size for Different Applications

11 KV & LT Lines

i) 3/2.50 mm (14 mm² Alloy Area) for street light only

ii) 7/2.00 mm (20 mm² Alloy Area)

iii) 7/2.50 mm (30 mm² Alloy Area)

iv) 7/3.15 mm (50 mm² Alloy Area)

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 mm2 Kg/Km KN Ohm/Km Ohm/Km

2.00 1.98 2.02 3.142 8.48 0.92 10.653 10.345

2.50 2.47 2.53 4.909 13.25 1.44 6.845 6.621

3.15 3.12 3.18 7.793 21.04 2.29 4.290 4.170

3.81 3.77 3.85 11.401 30.78 3.34 2.938 2.851

4.26 4.22 4.30 14.253 38.48 4.18 2.345 2.280

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 mm

2 mm Kg/Km Ohm/Km KN

14 3/2.5 14.73 5.39 40.15 2.304 4.33

20 7/2.00 21.99 6.00 60.16 1.541 6.45

30 7/2.5 34.36 7.50 94.00 0.990 10.11

50 7/3.15 54.55 9.45 149.20 0.621 16.03

80 7/3.81 79.81 11.43 218.26 0.425 23.41

100 7/4.26 99.77 12.78 272.86 0.339 29.26

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

7.1 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. 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

3 10 14

7 10 14

8.3 The outer layer shall be right handed. The wires in each layer shall be evenly and

closely stranded.

8.4 Climatic Conditions

The conductor shall be designed to suit for the climatic conditions specified in these

bidding documents.

9.0 Tests 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

10.0 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

ABY 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

14 mm2 alloy area ( 3/2.50mm) 1100 Kg






10.1.2 The normal length of various conductors shall be as given in the following table:

Conductor size Normal Length

14 mm2 alloy area ( 3/2.50mm) 2.0 Km






10.1.2.1 Longer lengths shall be acceptable.

10.1.2.2 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.

10.0 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.


_________________________________________________________________________

4.0 TECHNICAL SPECIFICATION FOR 33 KV & 11 KV PIN

INSULATOR

1.0 SCOPE

This specification covers the design, manufacture, testing at manufacturer's works,

transport to site, insurance, storage, erection and commissioning of insulators

required for 33 kV & 11 kV lines.

1.0 STANDARD

The pin insulators shall comply with the Indian Standard specification IS : 731/1971 as amended

from time to time having mechanical failing load of 10 K.N for 33 kV insulator and 5 kN for 11

kV insulator.

Insulators conforming to any other internationally accreted standards which ensure equal or

higher quality than the standard mentioned would also be acceptable.

Where the material is offered according to the inter-national standard a copy of the specification

shall be attached with the tender.

2.1 General requirement: The porcelain should be sound, free from defects, thoroughly vitrified and

smoothly glazed.

2.2 Unless otherwise specified, the glaze shall be brown colour. The glaze shall cover all the

porcelain parts of the insulators except those areas which serve as support during firing or are

left unglazed for purpose of assembly.

2.3 The design of the insulator shall be such that stress due to expansion and contraction in any part

of the insulator shall not lead to deterioration. The porcelain shall not engage directly with hard

metal.

2.4 Cement used in the construction of insulator shall not cause fracture by expansion or loosening

by contraction and proper care shall be taken to locate the individual parts correctly during

cementing. The cement shall not give rise to chemical reaction with metal fitting and its

thickness shall be as uniform as possible.

2.5 The insulator shall be multi-petty-coat type.

2.3 CLIMATIC CONDTIONS

a) Maximum temperature of air in shade 40° C

b) Minimum temperature of air in shade 2° C

c) Maximum humidity 93%

d) Average annual rainfall 2280 mm

e) Average number of rainy days per annum 150

f) Basic wind pressure 150 Kg/M2

g) Isoceraumic level 60

h) Altitude above MSL 100 M to 1000 M


_________________________________________________________________________

2.0 BASIC INSULATION LEVEL

The test voltage (minimum requirement) of the insulator shall be as follows:

33 KV 11 KV

1. Highest system voltage (rms) 36 KV 12 KV

2. Wet one minute power frequency test(rms) 76 KV 35 KV

3. Power frequency puncture withstand (rms) 180 KV 105 KV

4. Impulse voltage withstand test(Peak) 170 KV 75 KV

5. Dry one minute power frequency test (rms) 95 KV -

6. Power frequency flush and voltage

a) Dry 95 KV -

b) Wet 80 KV -

3.0 MECHANICAL LEADS

The minimum failing load of the insulators shall be 10 KN for 33 kV & 5 kN for

11 kV and the load shall be applied in transverse direction.

4.0 CREEPAGE DISTANCE

The minimum total creepage distance for insulators shall be 580 mm for 33 kV

and 320 mm for 11 kV insulators.

5.0 MARKING

Each insulator shall be legibly and indelibly marked to show the following:

1.0 Name or trade mark of the manufacturer

2.0 Month and year of manufacture

3.0 Minimum failing load in KN

4.0 Country of manufacture

5.0 ISI certificate mark, if any

6.0 Name of the Project under CMABY.

The marking on porcelain shall be printed and shall be applied before firing.

6.0 Type Tests

\

The following type tests shall be conducted on 'a suitable number of individual insulator unit, components, materials or complete strings:

a) Verification of dimensions

b) Thermal mechanical performance test

c) Power frequency voltage withstand and flashover test (i) dry (ii) wet

d) Impulse voltage withstand and flashover test (dry)

e) Visible discharge test (dry)

f) RIV test (dry)


_________________________________________________________________________

g) Mechanical failing Load Test (for pin insulator only)

h) 24 hrs. mechanical strength test (for strain / string insulator only)

7.4 Acceptance Test

i. Visual examination

ii. Verification of dimension

iii. Temperature cycle test

iv. Galvanizing test

v. Mechanical performance test

vi. Test on locking device for ball and socket coupling

vii. Eccentricity test

viii. Metallurgical test

a) Grain test

b) Inclusion rating For metal fittings only (in black

condition)

c) Chemical analysis

d) Microstructure.

ix. Mechanical failing load test (for Pin Insulator only)

x. Electro-mechanical strength test (for strain insulator only)

xi. Porosity test

xii. Puncture test(for Strain Insulator only)

7.5 ROUTINE TEST

a) Visual Inspection

b) Mechanical routine test (for Strain Insulator only)

c) Electrical routine test (for Strain Insulator only)

7.6 Tests During Manufacture

On all components as applicable

a) Chemical analysis of zinc used for galvanizing

b) Chemical analysis, mechanical, metallographic test and magnetic particle

inspection for malleable castings.

c) Chemical analysis hardness tests and magnetic particle inspection for forgings


_________________________________________________________________________

d) Hydraulic Internal Pressure tests On disc insulator shells

7.7 SCHEDULE OF TESTING AND ADDITIONAL TESTS

7.7.1 The Bidder has to indicate the schedule of following activities

in their bids:

a) Submission of drawings for approval

b) Submission of Quality Assurance Programme for approval

c) Offering of material for sample selection for type tests

d) Type testing.

7.7.2 Additional Tests

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

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

aforesaid type, acceptance and routine tests to satisfy himself that the material comply with

the Specifications.

7.7.2.2 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 bindirg 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.

7.7.3 Co-ordination for Testing

The Contractor shall have to co-ordinate testing of insulators with hardware fittings to

be supplied by other Contractor and shall have to also guarantee overall satisfactory

performance of the insulators with the hardware fitting.

7.7.4 Test Reports

7.7.4.1 Copies of type test reports shall be furnished in at least six (6) copies along with one



7.7.4.2 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

despatch.

7.7.4.3 Record of routine test reports shall be maintained by the Contractor at his works for

periodic inspection by the Owner's representative.

7.7.4.4 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.

7.7.5 Inspection

7.7.5.1 The Owner's representative or third party nominee shall at all times 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 ;1ub-Contractor's works, raw materials,


_________________________________________________________________________

manufacture of th::; material and for conducting necessary test as detailed herein.

7.7.5.2 The material for final inspection shall be offered by the Contractor only under packed

condition as detailed in the specification. The Owner shall select samples at random

from the packed lot for carrying out acceptance tests. Insulators shall normally be

offered for inspection in lots not exceeding 5000 nos. the lot should be homogeneous

and should contain insulators manufactured in the span of not more than 3-4

consecutive weeks.

7.7.5.3 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.

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




7.7.5.5 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.

7.0 BID DRAWING

8.0 The Bidder shall furnish full description and illustration of the material offered.

8.1 The Bidder shall furnish along with the bid the outline drawing (6 copies) of each

insulator unit including a cross sectional view of the insulator shell. The drawing shall

include but not limited to the following information:

a) Dimensions with manufacturing tolerances

b) Minimum creepage distance with positive tolerance

c) Protected creepage distance

d) Eccentricity of the disc

i. Axial run out

ii. Radial run out

e) Unit mechanical and electrical characteristics

f) Size and weight of Pin Ball Shank / ball and socket parts

g) Weight of unit insulator disc

h) Materials

i) Identification mark

j) Manufacturer's catalogue number

8.2 After placement of award, the Contractor shall submit fully dimensioned insulator

drawings containing all the details, in four (4) 'copies to Owner for approval. After


_________________________________________________________________________

getting approval from Owner and successful completion of all the type tests, the

Contractor shall submit 20 more copies of the same drawing to the Owner for further

distribution and field use at Owner's end.

9.0 Guaranteed Technical Particulars

The guaranteed technical particulars in respect of the Pin Insulators offered shall

be submitted along with the tender.


_________________________________________________________________________

5.0 TECHNICAL SPECIFICATION FOR 11 KV DISC. INSULATORS (T&C) 45 KN

1.0 SCOPE

This specification cover the design, manufactures, testing at

manufacturer's works, transport to site, insurance, storage, erection

and commissioning of strain insulators required for 11 KV line.

2.0 STANDARD

Strain insulators Tongue and Clevis type suitable for 11 KV lines shall be

conforming to IS : 731/1971 with its latest amendments and revision and

having mechanical failing load of 45 K.N.

Insulators conforming to any other internationally accepted standards which

ensure equal or higher quality than the standard mentioned would also be

acceptable.

Where the material is offered according to the inter-national accepted

standard a copy of the specification shall be attached with the tender.

2.1 GENERAL REQUIREMENT:

The porcelain should be sound, free from defects, thoroughly verified and

smoothly glazed. Unless otherwise specified, the glaze shall be brown colour.

The glaze shall cover all the porcelain parts of the insulators except these

areas which serve as support during firing or are left unglazed for purpose of .

assembly.

2.2 The design of the insulator shall be such that stress due to expansion and contraction in any part of the insulator shall not lead to deterioration. The porcelain shall not engage directly with hard metal.

2.3 The cement use in the construction of insulator shall not cause fracture by expansion or loosening by contraction and proper care shall be taken to locate the individual parts correctly during commencing. The cement shall not give rise to chemical reaction with metal fitting and its thickness shall be as uniform as possible.

2.4 The insulator shall be multi-petty-coat type.

2.5 The insulator shall be in one piece.

2.6 CLIMATIC CONDITIONS.:

(i) Maximum ambient temperature in shade : 40°C

(ii) Minimum daily average ambient air temperature : 35°C

(iii) Maximum yearly average ambient air temperature : 30°C


_________________________________________________________________________

(iv) Maximum ambient temperature : 2°C

(v) Maximum relative humidity : 93%

(vi) Average number of thunder storms days per annum : 45 days

(vii) Average number of rainy days per annum : 150 days

(viii) Average annual rainfall : 2280 mm

(ix) Number of months of tropical monsoon conditions : 5 months

(x) Maximum wind pressure : 150 Kg/sq.m

(xi) Altitude not exceeding : 1000 M

4.0 BASIC INSULATION LEVEL

The test voltage (minimum requirement) of the insulator shall be as follows:

a) Highest system voltage : 12 KV(rms) b) Wet one minute power frequency test : 35 KV(rms) c) Power frequency puncture withstand test : 1.3 times the actual dry

flashover voltage d) Impulse voltage withstand test : 75 KV (rms)

5.0 MECHANICAL LOADS

The minimum failing load of the insulators shall be 45 KN and the load shall be applied

transverse.

6.0 CREEP AGE DISTANCE:

The minimum total creepage distance for insulators shall be suitable for heavily polluted

and humidity atmospheric conditions and shall be 320 mm.

7.0 MARKING

Each insulator shall be legibly and indelibly marked to show the following:

a) Name or trade mark of the manufacturer

b) Month and year of manufacture

c) Minimum failing load in KN

d) Country of manufacture

e) ISI certificate mark and name of the project under "CMABY"

The marking on porcelain shall be printed and shall be applied before suitably.

8.0 TEST

8.1 Type test

The following type tests shall be conducted on a suitable number of individual insulator

unit, components, materials or complete strings:

1.0 Verification of dimensions


_________________________________________________________________________

2.0 Thermal mechanical performance test

3.0 Power frequency voltage withstand and flashover test (i) dry (ii) wet

4.0 Impulse voltage withstand and flashover test (dry)

5.0 Visible discharge test (dry)

6.0 RIV test (dry)

7.0 Mechanical failing Load Test (for pin insulator only)

8.0 24 hrs. mechanical strength test (for strain I string insulator only)

8.2 Acceptance Tests

a) Visual examination

b) Verification of dimensions

c) Temperature cycle test

d) Galvanizing test

e) Mechanical performance test

f) Test on locking device for ball and socket coupling

g) Eccentricity test

h) Metallurgical test

(i) Grain size

(ii) Inclusion rating

(iii) Chemical analysis

(iv) Microstructure

i) Mechanical failing load test (for Pjn Insulator only)

j) Electro-mechanical strength test (for Strain insulator only)

k) Porosity test

l) Puncture test (for strain Insulator only)

8.3 Routine Tests

a. Visual Inspection

b. Mechanical routine test for Strain Insulator only)

c. Electrical routine test (for Strain Insulator only)

7.4 Tests During Manufacture

On all components as applicable

a) Chemical analysis of zinc used for galvanizing

b) Chemical analysis, mechanical, metallographic test and magnetic particle inspection for

malleable castings.


_________________________________________________________________________

c) Chemical analysis hardness tests and magnetic particle inspection for forgings

d) Hydraulic Internal Pressure tests On disc insulator shells

8.0 SCHEDULE OF TESTING AND ADDITIONAL TESTS

8.1 The Bidder has to indicate the schedule of following activities in their bids:

a. Submission of drawings for approval

b. Submission of Quality Assurance Programme for approval

c. Offering of material for sample selection for type tests

d. Type testing.

8.2 Additional Tests

8.2.1 The Owner reserves the right of having at his own expense any other test(s) or

reasonable nature carried out at Contractor's premises, at site, or in any other place in

addition to the aforesaid type, acceptance and routine tests to satisfy himself that the

material comply with the Specifications.

8.2.2 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.

8.3 Co-ordination for Testing

The Contractor shall have to co-ordinate testing of insulators with hardware fittings to be

supplied by other Contractor and shall have to also guarantee overall satisfactory

performance of the insulators with the hardware fitting.

8.4 Test Reports

8.4.1 Copies of type test reports shall be furnished in at least six (6)' copies along with one



8.4.2 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 despatch.

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

inspection by the Owner's representative.

8.4.4 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.

9.0 INSPECTION

9.1 The Owner's representative or third party nominee shall at all times 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.

9.2 The material for final inspection shall be offered by the Contractor only under packed


_________________________________________________________________________

condition as detailed in the specification. The Owner shall select samples at random from

the packed lot for carrying out acceptance tests. Insulators shall normally be offered for

inspection in lots not exceeding 5000 nos. the lot should be homogeneous and should

contain insulators manufactured in the span of not more than 3-4 consecutive weeks.

9.3 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.

9.4 No material shall be dispatched from. its point of manufacture before it has been




9.5 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.

10.0 DRAWING

10.1 The Bidder shall furnish full description and illustration of the material offered.

10.2 The Bidder shall furnish along with the bid the outline drawing (6 copies) of each

insulator unit including a cross sectional view of the insulator shell. The drawing shall

include but not limited to the following information:

a. Dimensions with manufacturing tolerances

b. Minimum creepage distance with positive tolerance

c. Protected creepage distance

d. Eccentricity of the disc

(i) Axial run out

(ii) Radial run out

e. Unit mechanical and electrical characteristics

f. Size and weight of Pin Ball Shank I ball and socket parts

g. Weight of unit insulator disc

h. Materials

i. Identification mark

j. Manufacturer's catalogue number

10.3 After placement of award, the Contractor shall submit fully dimensioned insulator

drawings containing all the details, in four (4) copies to Owner for approval. After

getting approval from Owner and successful completion of all the type tests, the

Contractor shall submit 20 more copies of the same drawing to the Owner for further

distribution and field use at Owner's end.


_________________________________________________________________________

6.0 TECHNICAL SPECIFICATION OF L T & HT GUY INSULATOR

1.0 Scope

This specification covers design, manufacture, testing, transport to site,

insurance, storage, erection and commissioning of the strain type porcelain Guy

Insulator used in distribution overhead power lines.

1.0 Standard

This insulators shall comply with Indian Standard specification IS: 5500/1969 and as

amended from time to time except where they conflict with the requirements in this

specification.

Offers conforming to any other internationally accepted standard which ensure equal or

higher quality than the standard mentioned will be acceptable.

2.0 Service Conditions

The service conditions at which Insulator has to be designed is as follows:

i) Maximum ambient temperature in shade : 40°C

ii) Minimum daily average ambient air temperature : 35°C

iii) Maximum yearly average ambient air temperature : 30°C

iv) Maximum ambient temperature : 2°C

v) Maximum relative humidity : 93%

vi) Average number of thunder storms days per annum : 45 days

vii) Average number of rainy days per annum : 150 days

viii) Average annual rainfall : 2280 mm

ix) Number of months of tropical monsoon conditions : 5 months

x) Maximum wind pressure : 150 Kg/sq.m

xi) Altitude not exceeding : 1000 M

3.0 General Requirements

This porcelain shall be sound, free from defects, thoroughly vitrified and smooth glazed.

The design of the insulator shall be such that stresses to expansion and contraction at any

part of the insulator shall not load to its deterioration.

The glaze, unless otherwise specified, shall be brown in colour. The glaze shall cover the

entire porcelain surface parts except those areas that serves as supports during firing or area

otherwise required to be left unglazed.

4.0 Insulator Characteristics

The Guy Strain Insulators shall have the electrical and mechanical characteristics as shown

below:


_________________________________________________________________________

L.T. Strain Type Porcelain Guy Insulator

1) Length

2) Diameter

3) Cable hole dia'

4) Minimum failing load

5) Creepage distance

6) Dry one minute power frequency withstand voltage

7) Wet one minute power frequency withstand voltage

The dimensions are shown in Figure

H.T. Strain Type Porcelain Guy Insulator (11 KV)

1) Length 140 mm

2) Diameter 85 mm

3) Cable hole dia 25 mm + 1.5

4) Minimum failing load 88 KN

5) Creepage distance 48 mm

6) Dry one minute power frequency withstand 27 KV (rms) voltage

7) Wet one minute power frequency withstand 13 KV (rms) voltage

All other dimensions are shown in the Figure

5.0 Test

All insulators shall comply the following test as per IS : 5300

A) Routine test:

The following shall be carried out as., routine test.

a) Visual Examination

Every insulators shall be visually examined. The insulators shall be free from

physical distortion of shape and defects, and thoroughly verified and smoothly

glazed. They should be free from cracks or any other defects likely to be prejudicial

to the satisfactory performance in service.

b) Type test:

The following shall constitute the type test and those shall be conducted in the order given below:

i. Visual examination ii. Verification of dimensions iii. Temperature cycle test

iv. Dry one minute power frequency voltage withstand test

v. Wet one minute power frequency voltage withstand test

vi. Mechanical strength test


_________________________________________________________________________

vii. Porosity test.

The number of samples for type test are to be agreed to between the purchaser and the supplier.

c) Acceptance Test (to be conducted in the following order)

i. Verification of Dimensions ii. Temperature cycle test iii. Mechanical strength test iv. Porosity test

The number of samples for acceptance test shall be in accordance to IS: 5300.

d) Type test certificate fro National Test House/ Govt. recognized institutions/

Govt. recognized public Testing Laboratories are also to be submitted along with

the offer, failing which the offer is liable for rejection.

6.0 Marking

Each insulator shall be legibly and indelibly marked to shown the following:

a. Name of trade mark of the manufacturer b. Year of manufacture and name of project ABY

Marking on porcelain shall be printed and shall be applied before firing. Insulators may also be marked with the ISI certification mark.

7.0 Inspection

All tests and inspections shall be carried out at the place of manufacturer unless

otherwise agreed by the purchaser and the manufacturer at the time of purchase. The

manufacturer shall afford the inspector representing the purchaser or the third party

nominee, all reasonable facilities, without charge, to satisfy that materials are being

furnished in accordance with the specification. The purchaser reserves the right to have

the test carried out at his own cost by an independent agency whenever there is dispute

regarding the quality of materials supplied.

8.0 Drawing

Drawing specifically showing all dimensions is to be submitted along with technical bid.


_________________________________________________________________________

7.0 TECHNICAL SPECIFICATION FOR STAY SET (HT & LT)

1.0 Scope:

This specification covers the design, manufacture testing at manufacturer's works,

transport to site, insurance, storage, erection and commissioning of the Stay Sets (L

T/HT) required from the distribution lines at designated locations.

2.0 Standard: All the materials of stay sets shall comply in all respects with the

requirements of the latest edition of the relevant Indian or British Standard

specification except in so far as they are modified this specification.

3.0 Design Consideration: Stay Rods shall be Galvanised and shall be of circular Cross-section with

bow, thimble, nuts and bolts. The Rods shall be threaded at one end up to a minimum of 30 cm

length and shall be complete with Galvanised M.S. Anchor Plates with all necessary accessories.

All parts shall be heavily galvanised.


(i) Maximum ambient temperature in shade : 40°C

(ii) Minimum daily average ambient air temperature : 35°C

(iii) Maximum yearly average ambient air temperature : 30°C

(iv) Maximum ambient temperature : 2°C

(v) Maximum relative humidity : 93%

(vi) Average number of thunder storms days per annum : 45 days

(vii) Average number of rainy days per annum : 150 days

(viii) Average annual rainfall : 2280 mm

(ix) Number of months of tropical monsoon conditions : 5 months

(x) Maximum wind pressure : 150 Kg/sq.m

(xi) Altitude not exceeding : 1000 M

5.0 Testing: Type and Routine Tests should be carried on different components of each stay sets as

per relevant Indian Standard specification and certified copies of the above should be submitted

along with the tender.

6.0 Schedule Requirement·: Stay sets complete with Thimble bow stay

Rod/Anchor plate with nuts etc. and made of Rolled mild Steel Rod and plates as per

detailed given below:

A) Anchor Plate:

II) Thickness not below 5 mm.

III) Size not below 230 mmX230 mm with smooth edges (for L T)

IV) Size not below 300 mmX300 mm with smooth edges (for HT)

V) Well galvanised


_________________________________________________________________________

VI) Materials M.S. Rolled plate

VII) About 20 mm square hole at centre for locking the plate with the Anchor Rod

(for HT) & 19 mm (for L T)

B) Anchor Rod:

2.1 Length 1800 mm or above

2.2 Threaded length 30 cm or above

2.3 Diameter 18 mm or above (for HT)

2.4 Anchor plate and head: square size 30mm X 30mm with thickness 25 mm

having matching square size shank for locking the Anchor plate.

2.5 One ratched lock nuts, grooves must match the grooves at bow flange

2.6 One check nut.

2.7 Materials H.S.

2.8 Component well galvanised with extra care for the threaded portion.

2.9 Both lock and check nuts should be matching to the Anchor Rod thread such

that punching of thread after assembly at site safeguards them against

removal.

C) Thimble: The match bow diameter and bend should be well galvanised.

D) Bow: Rod diameter 12mm/16mm or above overall length 35cm/40cm or above. Flange

with well formed locking grooves matching the locking nut, bow ends will be riveted

securely with the flange. All items to be galvanised.

7.0 Inspection: All tests and inspections shall be carried out at the place of

manufacturer unless otherwise agreed by the purchaser and the manufacturers at

the time of purchase. A manufacturer shall afford the inspector representing the

purchaser or third party nominee, all reasonable facilities, without charge to satisfy

that the materials are being purchased as per specification. The purchaser reserves

the right to have the test carried out at his cost by an independent agency,

whenever there is dispute regarding the quality of the materials supplied.


_________________________________________________________________________

8.0 TECHNICAL SPECIFICATION FOR G.I. STAY WIRE

1.0 Scope

The specification covers design, manufacturing and testing, transporting to site,

insurance, storage, erection and commissioning of G.I. Stay Wire 7/10SWG and

7/14SWG.

2.0 Materials.

The wire shall be manufactured from steel, made by any suitable process and shall not contain

sulphur and phosphorus exceeding 0.065 percent each.

The wires shall be coated with Zinc Grade Zn 98 of IS:209-1966

The general requirements for the supply of Galvanized stay strand shall be in accordance with

IS:1387-1967

3.0 Construction

3.1 Grades: The wire shall be of Grade-I and tensile strength range 45 up to and including Kg/mm

3.2 The Galvanized stay strand shall be of 7/2 mm and 7/3.15 mm. the lay of the strands shall be

of the length of 7/2 mm and Tables-I of IS: 2141-1963. the wires shall be so stranded

together that when and evenly distributed pull is applied at the end of the completed strand

each wire will take equal share of the pull.

3.3 The length of the strand which may be supplied without joints in the individual wires

comprising it, depend on the length of wire which may be carried by the bobbin in a normal

stranding machine. The normal lengths of strand which shall be supplied without joints in

the individual wires, excluding welds made in the rod before drawing shall be as given

below. The lengths may be exceeded by agreement between the manufacturer and the

purchaser.

Diameter of wire in strand Normal length without joints of weld

3.15 mm 1000 M

2.0 mm 3000 M

3.4 In cases where joints are permitted, they shall be made by welding of brazing joints in the

same wire shall be separated by a length of not less than that shown in 3.3 and joints in

different wires in a strand shall not be less than 20 M apart.

4.0 Freedom from Defects :

4.1 Each coil shall be warranted to contain no weld joint or splice other than in the rod before it

is drawn and those permitted in 3.4. The wire shall be circular and shall be free scale,

irregularities imperfections flaws splits and other defects. The Zinc coating shall be smooth,

even the bright.


_________________________________________________________________________

5.0 Tests:

5.1 Chemical Analysis: Unless otherwise agreed to between the purchaser and the supplier, the

chemical analysis be carried out.

5.2 Tensile Test: The wire when tested in accordance with IS: 1521-1960, on gauge length of

100 mm shall have the minimum tensile strength specified in Tables 1 of IS : 2141/1968

according to the grade of the wire.

5.2.1 The tensile strength of the finalised strand shall be not less tI~an 93 percent of the aggregate

of the single wires.

5.3 Delivery test: The wire shall be subjected to the wrapping test in accordance with IS :

1755/1961. When wrapped eight times round its own diameter and on being subsequently

strengthened the wire shall not break or split.

5.3.1 Coating test: The uniformity of Zinc coating shall be tested by the method specified in IS :

2633/1964. The wire shall withstand the number or dips as specified in IS : 4826-1968.

6.0 Marking:

6.1 Each coil shall be provided with a label, fixed firmly on the inneJ part of the coil, bearing

'the following information.

a. Manufacturer's name or trade mark

b. Lot number and coil number

c. A brief description and quality of the materials.

d. Weight and

e. Any other particulars specified by the purchaser

.

6.2 The label may also be marked with the ISI certification mark.

7.0 Inspection: The test should be carried out in presence of the inspecting officer deputed by

purchaser or third party nominee and the test should be in conformity with relevant IS .


_________________________________________________________________________

9.0 TECHNICAL SPECIFICATION FOR CROSS ARM

1.0 Scope

This covers manufacturing, transport to site, insurance, storage, erection and

commissioning of different types of Cross Arms suitable for 33 kV, 11 kV and L T lines.


The cross arms should be suitable for the climatic condition mentioned below:



c) Maximum temperature of air in Sun 40°C

d) Maximum Humidity 93%

e) Average number of thunderstorm days 45

f) Average numbers of dust storms per annum 10

g) Maximum rainfall/annum 3500 mm

h) Average rainfall 2280 mm

i) Wind Pressure 97.8 Kg/Sq.mm

j) Altitude above MSL 100 m to 1000 m

3.0 Standards

A. Cross Arm for 33 KV Lines.

• The Cross Arms shall be made as per the drawings.

• The Cross Arms shall be made out of 100 X 50x6mm MS Channel

and MS Flat 75 X 8 mm

• The Cross Arm shall be hot dipped galvanized generally conforming

to the IS-2633/1972

• The Clamps for the Cross Arms shall be made out of 75 X 8 mm MS

Flat and shall be hot dipped galvanized conforming to IS-2633/1972

• The Clamps shall be designed to fit for STP/PSC Poles.

• The rolling and cutting tolerance for steel products conforming to

IS-226 shall be those specified in IS-1852/1972 or latest version.

B. Horizontal Type Cross Arm for 11 KV / 33 KV


_________________________________________________________________________

• It shall comprise of 100 X 50x6 mm, 3.2 M long MS Channel for 33

KV and 2.2 mt. long for 11 KV to be provided on STP/ PSCC Poles

• The rolling and cutting tolerance for steel products conforming to

IS-226 shall be those specified in IS-1852/1972 or latest version.

• The Cross Arm shall be hot dipped galvanized generally conforming

to the IS-2633/1972

• The clamps for the Cross Arms shall be made of 50 X 6 MS Flat and

shall be hot dipped galvanized.

• The Cross Arm should not have any welded joints.

4.0 INSPECTION




acceptance of any equipment under this specification by the purchaser shall not

relieve the supplier of his obligation of furnishing equipment in accordance with the


defective.


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10.0 TECHNICAL SPECIFICATION FOR G.I. WIRE

1.0 Scope

This specification covers the manufacturing, testing at works, transport to site,

insurance, storage, erection and commissioning of Galvanised Iron Wire of sizes 4

mm and 5 mm diameter.

2.0 General requirements

2.1 It relating to the supply of mild steel wire shall be as per IS: 1387/1967 and the wire shall be drawn from the wire rods conforming to IS: 7887/1975.

2.2 The requirements for chemical composition for the wires shall conform to

IS:7887/1975.

2.3 Mild steel wire for General Engineering purpose shall be of following sizes:

I) 4mm - diameter (8 SWG)

II) 5mm - diameter (6 SWG)

2.4 Tolerance permitted on the diameter of wire shall be as per Table -1 of IS:280/1978.


The cross arms should be suitable for the climatic condition mentioned In these

bidding documents:

4.0 Mechanical Properties

2.10 Tensile Test: Tensile strength of wire when tested in accordance with IS:

1521-1972, shall be within the limits given in Table-2 of IS: 280/1978.

2.11 Wrapping Test: Wires shall be subjected wrapping test in accordance with IS:

1755-1961. The wire shall withstand without breaking or splitting. being wrapped eight

times round its own diameter and subsequently straightened.

5.0 Surface finish

5.1 The wire shall have galvanized finishes. The galvanized coating of steel wire shall conform

to the requirements for anyone of the types of coatings given in IS: 4826-1968 as per

agreement with the purchaser.

5.2 The coating test for finishes other than galvanized, copper coated or tinned shall be subject

to between the purchaser and the manufacturer.

5.3 Unless otherwise agreed to the method of drawing representative samples of the material

and the criteria for conforming shall be as prescribed in Appendix (A) of IS: 280/1978.

5.4 All finished wires shall be well and cleanly drawn to the dimensions specified. The wire shall be sound, free from splits, surface flaws, rough jagged and imperfect edges and other


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harmful surface defects.

5.5 Each coil of wire shall be suitably bound and fastened compactly and shall be protected by

suitably wrapped.

6.0 INSPECTION

Inspection may be carried out by the purchaser or third party nominee at any

stage of manufacture. The supplier shall grant free access to the purchaser's

representative or third party nominee at a reasonable time when the work is in

progress. Inspection and acceptance of any equipment under this specification

by the purchaser shall not relieve the supplier of his obligation of furnishing

equipment in accordance with the specification and shall not prevent

subsequent rejection if the equipment is found defective.


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11.0 TECHNICAL SPECIFICATION FOR P.G CLAMP FOR AAA

CONDUCTOR

1.0 Scope:

The scope covers design, manufacturing, testing at work, transport at

site, insurance, storage, erection and commissioning of P.G. Clamp

suitable for Conductor size Wolf/RacoonlWeasel/3 Bolt Type strictly

conforming to IS : 2121 and Galvanising conforming to IS : 2633 as

per the following:

2.0 Standards:

� P.G. Clamps suitable for conductor size, wolf/raccoon/weasel 3 bolt types strictly conforming to IS : 2121 and galvanizing conforming to IS: 2633 as per the following:

� P.G. clamp body to be made from aluminium alloy

� Clamps nuts and bolt and washer should be made of hot deep galvanized steel

� Spring washer be made of electro-galvanize special steel.

Dimensions Style No.

Maximum conductor

diameter in mm

A mm

B mm

C mm

D mm

E mm

No of Bolts

Approx. Weight

Kg.

A-80 10.11 79 48 22 ½ 2 2 0.17

A-81 14.45 95 57 30 ½ 2 2 0.18

A-83 20.78 140 76 42 5/8 1 3 0.51

4.0 Climatic Conditions.











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5.0 INSPECTION




acceptance of any equipment under this specification by the purchaser shall not relieve

the supplier of his obligation of furnishing equipment in accordance with the


defective.


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12.0 TECHNICAL SPECIFICATION FOR 33 KV A.B. GANG OPERATED

SWITCHES

1.0 Scope:

This specification covers the design, manufacture and testing at works, transport to site,

insurance, storage, erection and commissioning of outdoor type A.C. Gang Operated Air

Break Switches suitable for use on 11 KV power systems conforming to 155: 1818/1972

with up to-date amendments and revisions.

2.0 i) Ratings: 33 KV 400 Amps 50 C/S AC, 3-Phase continuous

ii) Type: The insulators should be of tilting type for 11 KV class and should be suitable for both horizontal and vertical mounting.

iii) Insulators: There will be 3(three) insulators stacks per pole. The insulators

should be manufactured strictly conforming to ISS: 731 1971 with its up to date

amendments and revisions and it should be easily replaceable in the event of any

damage or defect.

The insulator /insulators/stacks and fixture should be procured from reputed insulator manufacturers as integral union and should bear the manufacturers monogram both on the insulators as well as on the malleable caps. A certificate should be furnished to the effect that the insulators along with the fixtures are procured as integral units from the manufacturers. The fixtures are to be of malleable casting wherever applicable .

iv) Main Contacts : The insulators should be complete with :nale contuc~ blades

and self aligning full-floating jaw type female contacts aided with powerful

springs to provide sufficient contact pressure on both sides of the male contact.

The contact surface should be made of non-ferrous alloy such as bronze, gun-

metal of brass. The name of the alloy should be mentioned clearly. Full floating

type contacts shall be preferred. The contacts shall be designed so as to

withstand the rated currents without over-heating and should also be able to

withstand electromagnetic stresses and shattering of rated short time current.

The contact should also assure a good wiping action during engagement and dirt

accumulation.

v) Arching Contacts : The insulators should be provided with securely placed and

replaceable type arching contacts to act as the first and the last contacts to

prevent burning of the main contacts. The moving arching contact arm should be

of adequate section to withstand the arching, should be of sufficient mechanical

strength and should be placed preferably on the top of the main male contact.

vi) Current Carrying Path: All current carrying paths should be of non- ferrous Metals. In case of tilting type of design the flexible cords are to be of honey comb design and should be made of suitable non-ferrous metal. The terminals of the cord should be of the same width as that of the cord itself and be fixed with non-ferrous nuts and bolts. While designing individual areas of all current carrying paths made of nonferrous alloy, prime consideration of mechanical loading and electrical copper equivalent of 1 Amp! sq.mm. loading should be considered.

vii) Terminal Connectors : The insulators should be provided with detachable 6 (six)


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bolted palm type terminal connectors 100 mm long suitably grooved to

accommodate conductors up to 12.5 mm diameter. The connector including the

fixing bolts and nuts should be made of suitable non-ferrous metals such as

brass, bronze and gun-metal which should be clearly indicated.

The six bolted palm type connector-groove portion should be finely grinded and

finished to accommodate aluminium conductor up to 12.5 mm diameter

suitably.

It may be noted that all nonferrous parts should be tinned properly as per best

engineering practice.

A pair of brass plate washer must be provided on each nuts & bolts of the

connector.

viii) Operating Mechanism: The isolators should be assembled on M.S. Galvanised

channel base with holes suitable for fixing on the mounting structures and

should be complete with the follows:

For 11 kV Class Tiltinq Type Desiqn :

Phase coupling shaft: 2 .5 cm x 2.5 cm C.I. solid bar of 2.30 meter length.

Operating Pipe: 2.6 cm outside dia 3.25 mm thick 6 meters long.

The operating mechanism should be complete with intermediate guides suitable

operating handle with padlock and chain for locking the handle in both 'ON' &

'OFF' positions.

The flexible coupling, in case of tilting type design will be supported on hinged

linked made of suitable pairs of G I straps with suitable space to accommodate

the cord and with three hinges. two on the insulator fixtures and one between the

line.

The pivots of the hinges shall be of G.1. nuts and bolts with sufficiently strong split pin arrangements of suitable metal. Suitable spring stop mechanism shall be provided at the base the moving post insulator/post insulators stacks of each pole to prevent overshooting and ensure that the contact surface area held in contact uniformly during closed position and also to held it in position after opening.

Necessary and adequate adjustments should be provided in the operating

mechanism to ensure, synchronous closing and opening in the three phase of

the insulator.

Inter locking should be provided so that earthing switch cannot be operated without first isolating the line. The inter-locking shall be mechanical either through lever arrangements or through locking arrangements or both. Extra for each may be indicated separately. Auxiliary contacts enclosed in a terminal board shall be provided for semaphore indications of open and closed positions of the main isolator as well as open and closed positions of the, earthing contacts.

General considerations: All ferrous parts used in the Isolator units should be


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hO,t .. dip galvanised in accordance with the relevant ISS.

3.0 TEST.

The offers shall invariably be supported by complete type test certificate

from National Test House/C.P. R.I/any other recognised 'Public

Institutions and as per ISS: 9920 (pt-1 to iv) with up to date amendments.

Test certificate should be furnished against individual component parts of

the isolator such as insulators etc. The manufacturers should have the

facilities of laboratory testing of the isolators at their works as per relevant

ISS/ BSS. They should furnish the detailed specifications along with the

make and capacity of testing equipments at their disposal along with

tender.

4.0 Sample

The tenderer shall submit the sample complete with accessories at his own cost along with the tender. Samples not received within the stipulated time may· disqualify the tender. The tender without sample may be rejected outright.

5.0 Climatic Conditions:











6.0 Inspection

The man-ufacturer shall afford the inspection representing the purchaser or third party

nominee at works all facilities to satisfy him that the material is being furnished in

accordance with specification.


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7.0 Name Plate

The bidder has to provide the following particulars on the name plate of the equipment:

a. Name of the equipment

b. Manufacture's name

c. Operating range

d. Name of the purchaser

7.0 Performance:

The materials should be guaranteed for satisfactory performance for a period of 18

months from the date of receipt of the same in. good conditions or 12 months from the

date of commissioning which ever is earlier and will be subject for free

replacement/repair against any manufacturing defects.