bid volume -ii sec vii ted-140

BID VOLUME-II SEC VII TED-91

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DAKSHIN HARYANA BIJLI VITRAN NIGAM

SPECIFICATIONS

Supply of material, erection testing & commissioning of 11 KV Automatic Power Factor Corrector (APFC), (after utilizing the healthy capacitor units of the existing capacitor banks, RVT, VCB, etc.) along with civil work involved on all the 6.3, 6.3/8, 8,10 & 12 MVA Transformers and maintaining the same for five years at various 33 KV Sub/stations. on turnkey basis under the jurisdiction of DHBVN.

VOLUME – II

SECTION – VII

BID NO. P&D/TED-140/2011/Pkg.-A,B,C&D

Package- A : For Sirsa Circle.

Package- B : For Hisar Circle.

Package- C : For Bhiwani Circle.

Package- D : For Narnaul, Faridabad & Gurgaon Circle.

HISAR

April -2011


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INDEX

VOLUME – II

SECTION DESCRIPTION PAGE NO.

VII A, B & C

Technical

Specifications

VII D

Drawings


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SECTION VII-A 1. Introduction

The scope of this specification covers Supply of material, erection testing &

commissioning of 11 KV Automatic Power Factor Corrector (APFC), (after

utilizing the healthy capacitor units of the existing capacitor banks, RVT,

VCB, etc.) along with civil work involved on all the 6.3, 6.3/8, 8,10 & 12

MVA Transformers and maintaining the same for five years at various 33 KV

Sub/stations. on turnkey basis under the jurisdiction of DHBVN, under the

jurisdiction of DHBVN on supply-cum-erection (turnkey ) basis.

1.1 Scope :

This specification covers detailed survey, complete engineering of the work

as per design, given in the tender documents, manufacture, testing and supply

of all the required material on FOR destination/Site basis including

transportation, insurance, storage, erection, dismantlement, testing and

commissioning of new APFC as per design, given in the tender documents,

manufacture, testing and supply of all the required material on FOR

destination/Site basis including transportation, insurance, storage, erection,

dismantlement and other equipment as per site requirement, testing and

commissioning of 11 KV Automatic Power Factor Corrector (APFC), (after

utilizing the healthy capacitor units of the existing capacitor banks, RVT,

VCB, etc.) along with civil work involved on all the 6.3, 6.3/8, 8, 10 & 12

MVA Transformers and maintaining the same for five years at various 33 KV

S/Stns. on turnkey basis. The supply items shall include APFC Panel with

enclosure, Relay, Vaccum Contactor, Reactor 0.2% S.R, HT HRC Fuse

63/100 Amp. 11 KV, all fittings, Panel, Busbar, Post Insulator, Structure,

Elect. Consumable etc. and all other Acc. Required. In APFC panel, VCB and

Control & Relay Panel, RVT, Surge Arrestor with base insulators, Isolator

with Structure, 3 Core 185 mm.sq. 11 KV XLPE (Power) Cable, Control

Cable of various size (i.e. 2C/ 1.5 mm.sq., 4C/ 2.5 mm.sq., 19C / 1.5 mm.sq.),

Cable Jointing Kit for 3Core 185 mm.sq., 11KV XLPE Power Cable, Earth


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mat (with 75X8 MS Flat) connecting with earth pit with the provision of Plate

earthing with GI Pipe 40 mm dia, 3 mtr. Long, Capacitor Bank with structure

of various capacity i.e 50,100,150 & 200 KVAr and all the other material / job

not specifically mentioned but required to complete the work shall also be in

the scope of the contractor. All type of civil work (structure foundation, laying

of trench etc.,), required for completing the project/work shall be included in

the scope of contractor. Any kind of dismantlement or relocation of any

equipment shall be included in the contractor scope. The dismantled material

shall be returned to Nigam’s store.

NOTE: The contractors will obtain the detailed drawings /sketches of the work involved from the GM/Operation Concerned.

1.1.1 This specification also includes the supply of the material as above. The

bidder shall clearly indicate in his offer the sources from where he proposes to

procure the raw material / completed material and its components.

1.1.2 Any material not specifically mentioned in the contract but required to

complete the job is deemed to be included in the scope of work of the

Contractor.

1.1.3 Location Details: The work shall be laid in the areas covered under DHBVN

in Haryana.

2. Detailed Survey for Optimization:

2.1 The detailed survey for providing 11 KV APFC along with the allied material

and profiling shall be carried out by the successful bidder. The provisional

quantity has been indicated in the Bill of Material for each package.

(a) The detailed survey shall be carried out by the bidder along the

approved alignment. The bidder will examine the site of works and its

surroundings and obtain himself, at his own responsibility and expenses, all

information regarding general site characteristics, infrastructure details etc.

The purchaser will, however, assist the interested bidder to see and inspect

the site of work. For this purpose the bidders are requested to contact :

General Manager, Planning & Design, DHBVN, Vidyut Sadan, Vidyut

Nagar, Hisar or the respective DGM (Operation) / AGM(OP) of the area.


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2.2 The bidder should note that the Employer will not furnish the topographical

map prepared by survey of India but will make available any assistance that

may be required for obtaining topographical map.

3. Clearance from Ground:

Clearance from Ground shall be provided in conformity with the Indian

Electricity Rules 1956.

3.1 The profile sheets duly spotted along with preliminary schedule shall be

submitted for the approval of the Employer. After approval the, Contractor

shall submit six more sets of approved reports along with one set of

reproducible final profile drawings to the Employer for record purpose.

4. Environmental Conditions :

5. General Climatic Conditions :

The area is in extreme climatic belt. Monsoons are generally active in the

area from the month of July to September. The area is also prone to mild dust

storms during the months of March to May. The maximum temperature shall

be of the order of 50C and minimum temperature shall be of the order of -

2C. Normal every day temperature is 32C.

a. Technical Data:

The bidder shall furnish all technical data as per relevant schedules in five

copies.

b. Statutory Regulations and Standards :

6. Statutory Regulations:

The Contractor is required to follow Statutory Regulations stipulated in

Electricity Act 1948 and Indian Electricity Rules 1956 as amended to-date and

other local rules and regulations referred to in this specification.

7. Reference Standards:

The work shall be carried out in accordance with specifications &

construction standards attached hereto. The codes or standards referred to in

this specification shall govern in all cases wherever such references are made.

In case of conflict between such codes or standards and specification, latter

shall govern. Such codes or standards referred to shall mean the latest

revision, amendments / changes adopted and published by relevant agencies.

Other internationally accepted standards, which ensure equivalent or better


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performance than those specified shall also be accepted. All tested steel

sections shall be supplied conforming to relevant Indian Standard

Specifications.

c. Quality Assurance, Inspection and Testing :

7.1 Quality Assurance :

The Contractor shall adopt suitable quality assurance programme to control

each activity. Such programme shall be outlined by the Contractor and shall

be finally accepted by the Employer.

7.2 Quality Assurance Document :

The Contractor shall be required to sub it all quality assurance documents as

stipulated in quality plan at the time of Employer’s inspection of material.

The Employer through his duly authorized representative reserves the right to

carry out quality inspection / audit & checks to see the adequacy of the

Contractor’s quality management programme.

7.3 Inspection and Testing :

The Employer shall inspect the major material at the works of supplier before

dispatch. The requisite original type test certificates wherever required will be

submitted by the Contractor / Supplier at the time of inspection for

verification / examination by the Inspector. The material shall not be

dispatched without dispatch authorization by the Employer. Other material

shall be inspected by the Employer before erection at site. The Employer

shall have the right to re-inspect at his expenses any material through

previously inspection and approved by him at the Contractor’s / Supplier’s

works, before / after the same are erected at the site. If following the latter,

the material is found defective, then the Contractor shall bear the cost of this

inspection and re-instatement according to specifications. The Employer shall

get the material inspected from his Engineers or from any other inspection

agency at its discretion.

7.4 Tentative Bill of material for each Package is as per Annexure/Schedule of

Prices.

7.5 Meteorological Data is as per Annexure-II.

8.1.1 Steel Items : All steel items shall be conform to IS:2062 Grade-A (amended

to date) or equivalent to IEC Standard.

8.1.2 Drawings:


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8.1.3 The design and drawings submitted by the Contractor shall be

approved/commented by the Employer as the case may be within 20 days of

receipt of design/drawings in the office of the Engineer. If the

design/drawings are commented by the Employer, the Contractor shall submit

revised design/drawings within 15 days of date of issue of comments. The

drawing will also be submitted by the Contractor to the Engineer who will

take further necessary action to approve the same or get it approved from the

competent authority.

8.1.4 The Contractor is required to furnish the progress of submissions and

approvals of design and drawings on 25th day of every month till the

completion of all the design activities.

9. All unpainted /Un-galvanized iron sections like Channel, Angle/Clamps Stay

sets etc. shall be given 2 coating of Red Oxide before installation to prevent

rusting. To avoid rusting anti-corrosion aluminium paint shall also be

provided.

10.. Final Checking, Testing and Commissioning:

After completion of the works, final checking of the equipment shall be

carried out by the Contractor to ensure that all the erection has been done

according to the specifications and as approved by the Employer. All the

works shall be thoroughly inspected keeping in view the following main

points:

a) All the structures are straight & erect and in proper alignment. Sufficient

back filed earth is lying over each pit and it is adequately rammed /

compacted.

b) All bolts are properly tightened and punched / tack welded.

c) All other requirements to complete the work are properly installed.

11 General Technical Conditions :

11.1 The above provisions shall supplement all the detailed technical specifications

and requirements brought out herein. The Contractor’s proposal shall be

based on the use of materials complying fully with the requirements specified

herein.

11.2 Engineering Data:

11.3 The furnishing of engineering data by the Contractor shall be in accordance

with the schedule as specified in the technical specifications. The review of


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these data by the Employer will cover only general conformance of the data

to the specifications and not a thorough review of all dimensions quantities

and details of the materials or items indicated or the accuracy of the

information submitted. The review of the Employer shall not be considered

by the Contractor as limiting any of his responsibilities and liabilities for

mistakes and deviations from the requirements specified under these

specifications.

11.4 All engineering data submitted by the Contractor after review by the

Employer shall form part of contract document.

If errors are discovered any time during the validity of the contract then the

Contractor shall be responsible for their consequences.

11.5 The quantities worked out here are only tentative. The Contractor shall work

out actual requirement and get it approved from the Engineer-in-Charge. The

payment shall be made on actual basis.

Cl 11.6: 1. For the Drawings/GTPs/Standards which are not included in the above tender

documents, latest REC standards are to be followed.

2. The technical specifications as given in the tender documents are covering a

range of items, in that case only the material as per the schedule of prices is to be

considered


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SECTION VII- B


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SECTION – VII-B 1. Drawings: 1.1 All drawings submitted by the Contractor including those submitted at the

time of Bid shall be with sufficient detail to indicate the type, size, arrangement, dimensions, material description, Bill of materials, weight of each component, break-up for packing and transportation, fixing arrangement required, the dimensions required for installation and any other information specifically requested in these specifications.

1.2 Each drawing submitted by the Contractor shall be clearly marked with the name of the Employer, the specification title, the specification number and the name of the project. All titles, notings, markings and writings on the drawing shall be in English. All the dimensions should be to the scale and in metric units.

1.3 The Contractor shall submit the necessary detailed plan or other necessary construction drawings for approval to the Employer within 20 days of Letter of Intent.

1.4 The detailed plan drawings submitted by the Contractor shall be examined by the Employer as far as practicable within 20 days and shall be modified by the Contractor, if any modifications and/or corrections are required by the Employer. The Contractor shall incorporate such modifications and/or corrections and submit the final drawings for approval.Any delays arising out of failure by the Contractor to rectify the drawings in good time shall not alter the contract completion date.

1.5 The drawings submitted for approval to the Employer shall be in quadruplicate. One print of suet drawings shall be returned to the Contractor by the Employer marked “approved/approved with corrections “. The Contractor shall thereupon furnish the Employer additional prints as may be required along with one reproducible in original of the drawings after incorporating all corrections.

1.6 The work shall be performed by the Contractor strictly in accordance with these drawings and no deviation shall be permitted without the approval of the Employer, if so required.

1.7 All manufacturing, fabrication and erection work under the Scope of Contractor, prior to the approval of the drawings shall be at the Contractor’s risk. The Contractor may make any changes in the design which are necessary to conform to the provisions and intent of the Contract and such changes will again be subject to the approval by the Employer.

1.8 The approval of the documents and drawings by the Employer shall mean that the Employer is satisfied that:

a) The Contractor has completed the part of the Works covered be the subject document (i.e., confirmation of progress of work).

b) The work appears to comply with requirements of specifications.

In no case the approval by the Employer of any document does imply compliance with all technical requirements, nor the absence of errors in such documents.

1.9 The following is the general list of the documents and drawings that are to be approved by the employer:

a) Work Schedule (Master Network) Plan. b) Detailed survey report and profile drawings


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c) Pert Chart. 1.10 Design Improvements :

1.10.1 The Employer or the Contractor may propose changes in the specification and if the parties agree upon any such changes and the cost implication, the specification shall be modified accordingly.

1.10.2 If any such agreement affects the price and schedule of completion, the parties shall agree in writing as to the extent of any change in the price and schedule of completion before the Contractor proceeds with the change. Following such agreement, the provision thereof, shall be deemed to have been amended accordingly.

1.11 Design Co-ordination. The contractor shall be responsible for the selection and design of

appropriate material/item to provide the best co-ordinated performance of the entire system. The basic design requirements are detailed out in this specification. The design of various components, sub-assembly and assemblies shall be so done that it facilitates easy field assembly and maintenance.

1.12 Design Review Meetings The contractor will be called upon to attend design review meetings

with the Employer and the consultants of the Employer during the period of contract. The Contractor shall attend such meetings at his own cost at Hisar or at mutually agreed venue as and when required. Such review meeting shall be held as & when required.

2. Packing

All the material shall be suitably protected, coated, covered of boxed and created to prevent or deterioration during transit, handling & storage at site till the time of erection. The Contractor shall be responsible for any loss or damage during transportation, handling and storage due to improper packing. The contractor shall include and provide for securely protecting and packing the materials so as to avoid loss or damage during transport during transport by air, sea, rail and road. All packing shall allow for easy removal and checking at site. Wherever necessary, proper arrangement for attaching slings for lifting shall be provided. All packages shall be clearly marked for with sign showing ‘up’ & ‘down’ on.

3. Progress Report

Appropriate visual charts shall accompany the monthly progress report detailed out the progress achieved on all erection activities as compared to the schedules. The report shall also indicate the reasons for variance between the scheduled and actual progress and the action proposed for corrective measures wherever necessary.

4. Manpower Deployment Report The Contractor shall submit to the employer on the first day of every month a manpower deployment schedule for each activity. The Contractor shall also submit to the employer on the first day of every month a manpower deployment report of the previous month detailing the No. of persons scheduled to have been employed and actually employed. Tools, Tackle and Scaffolding


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The Contractor shall provide all the construction equipment, tools, tackle and scaffoldings required for construction, erection and commissioning of the power line covered under the contract. He shall submit a list of all such material of the employer before the commencement of work at site. These tools and tackle shall not be removed from the site without the written permission of the Employer.

First Aid and General Hygiene

The Contractor shall provide necessary first aid & reasonable Hygiene facilities for all his employees, representatives and workmen working at the site Enough number of Contractor’s personnel shall be trained in administering the first aid.

Security

The Contractor shall have total responsibility for all requirement and materials in his custody, stored, loose, semi-assembled and or erected by him at site. The Contractor shall make suitable security arrangements including employment of security personnel to ensure the protection of all materials, equipment and works from theft, pilferage and any other damages and loss.

Materials Handling and Storage: All the supplies under the Contract as well as arriving at Site shall be promptly received, unloaded and transported and stored in the stores by the Contraction. Contractor shall be responsible for examining all the shipment and notify the employer immediately of any damage, shortage, discrepancy etc for the purpose of Employer’s information only. The Contactor shall submit to the Employer every week a report detailing all the receipts during the week. However, the Contactor shall be solely responsible for any shortage or damages in transit, handling and/ or in storage and erection at Site. The Contractor shall maintain an accurate and exhaustive record detailing out the list of all items received by him for the purpose of erection and keep such record open for the inspection of the Employer. Each package shall be legibly marked by the Contractor/ Supplier at his expenses showing the details such as description and quantity of contents, the name of the consignee and address, the gross and net weight of the package, the name of the Contractor etc.

5. Erection Conditions The following shall supplement the conditions already contained in the other parts of these specifications and documents and shall govern that portion of the work on this Contract to be performed at site. Regulation of local Authorities and Statutes


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The Contractor shall comply with all the rules and regulations of local authorities during the performance of his field activities. He shall also comply with the Minimum Wages Act, 1948 and the payment of Wages Act (both of the Govt. of India) and the rules made there under in respect of any employee or workman employed or engaged by him or his Sub-Contractor. All registration and statutory inspection fees, if any, in respect of his work pursuant to this Contract shall be to the account of the Contractor. However, any registration, statutory inspection fees lawfully payable under the provisions of the statutory law and its amendments from time to time during erection in respect of the 11 KV APFC and allied material, ultimately to be owned by the Employer, shall be to the account of the Employer. Should any such inspection or registration need to be re-arranged due to the fault of the Contractor or his Sub-Contractor, the additional fees to such inspection and /or registration shall be borne by the Contractor. Contractor’s Field Operation. The Contractor shall keep the Employer informed in advance regarding his field activity plans and schedules for carrying-out each part of the works. Any review of such plan or schedule or method of work by the Employer shall not relieve the Contractor of any of his responsibilities towards the field activities. Such reviews shall also not be considered as an assumption of any risk by the Employer or any of his representatives and no claim of the Contractor will be entertained because of the failure or inefficiency of any such plan or schedule or method of work reviewed. The Contractor shall be solely responsible for the safety, adequacy and efficiency of tools and plants and his erection methods. All the materials stored in the open or dusty location must be covered with suitable weather-proof and flameproof covering material as applicable. The Contractor shall be responsible for making suitable indoor storage facilities at various locations to store all items /materials which require indoor storage.

6. Construction Management

Time is the essence of the Contract and the Contractor shall be responsible for performance of his works in accordance with the specified construction schedule. If at any time, the Contractor is falling behind the schedule for reasons attributable to him, he shall take necessary action to make good for such delays by increasing his work force or by working overtime or otherwise to accelerate the progress of the work and to comply with schedule and shall communicate such actions in writing to the Employer, satisfying that his action will compensate for the delay. The Contractor shall not be allowed any extra compensation for such action.

7. Field Office Records

The Contractor shall set up his site offices at different locations to facilitate smooth working. The site offices shall be manned by his supervisors/ other staff. The Contractor shall maintain at his Site office up-to-date copies of all drawings, specifications and other supplementary data complete with all the latest revisions thereto. The Contractor shall also maintain, in addition, the continuous record of all changes to the above


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Contract Documents, drawings, specifications, supplementary data etc. effected in the field and on completion of his total assignment under the Contract shall incorporate data to indicate as installed conditions of the material supplied and erected under the contract. Such drawings and engineering data shall be submitted to the Employer in required number of copies.

8. Protection of Property and Contractor’s Liability : The Contractor will ensure provision of necessary safety equipment

such as barriers, sign-boards, warning lights and alarms etc. to provide adequate protection to persons and property. The Contractor shall be responsible to give reasonable notice to the Employers and the Owners of public or private property and utilities when such property and utilities are likely to get damaged or injured during the performance of his works and shall make all necessary arrangements with such owners, related to removal and/or replacement or protection of such property and utilities.

9. Insurance: The Contractor shall arrange & keep alive all the required insurance

covers for his Employees/third parties as under :- 9.1 Workmen’s Compensation Insurance:

This insurance shall protect the Contractor against all claims applicable under the Workmen’s Compensation Act, 1948 (Government of India). This policy shall also cover the Contractor against claims for injury, disability disease or death of his or his Sub-Contractor’s employees, which for any reason are not covered under the Workmen’s employees, which for any reason are not covered under the workmen’s Compensation Act, 1948. The liabilities shall not be less than: Workmen’s Compensation As per statutory Provisions Employee’s Liability As per statutory Provisions

9.2 Comprehensive Automobile Insurance

This insurance shall be in such a form to protect the Contractor against all claims for injuries, disability, disease and death to members of public including the Employer’s men and damage to the property of others arising from the use of motor vehicles during on or off the site operations, irrespective of the ownership of such vehicles. The minimum liability covered shall be as herein indicated: Fatal Injury : Rs. 100,000 each person

: Rs. 200,000 each occurrence

Property Damage : Rs. 100,000 each occurrence


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In case the employer is made to pay such compensation, the

Contractor will be liable to reimburse the Employer such amount even

in addition to the compensation indicated above.

9.3 Comprehensive General Liability Insurance

9.3.1 The insurance shall protect the Contractor against all claims arising

from injuries, disabilities, disease or death of members of public or

damage to property of others, due to any act or omission on the part of

the Contractor, its agents, its employees, its representatives and Sub-

Contractors or from riots, strikes and civil commotion.

9.3.2 The above are only illustrative list of insurance covers normally

required and it will be the responsibility of the Contractor to maintain all

necessary insurance coverage to the extent both in time and amount to

take care of all its liabilities either direct of indirect, in pursuance of the

Contact.

10. Protection of Measurements and Reference Points :

The Contractor shall ensure that any finds such as relics, antiques,

coins, fossils, etc. which he may come across during the course of

performance of his works either during excavation or elsewhere, are

properly protected and handed over to the Employees. Similarly, the

Contractor shall ensure that the bench marks, reference points etc.

which are marked either with the help of Employer shall or by the

Employer shall not be disturbed in any way during the performance of

its works. If, any work, is to be performed which disturbs such

reference, the same shall be done only after these are transferred to

other suitable locations under the direction of the Employer. The

Contractor shall provide all necessary materials and assistance to such

relocation of reference points etc.

11. Work and Safety Regulations:

11.1 The Contractor shall ensure safety of all the workmen, materials plant

and equipment belonging to him or to the others, working at the Site.

The Contractor shall also provide for all safety notices and safety

equipment required by the relevant legislations and deemed necessary

by the Employer.


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11.2 The Contractor will notify, well in advance to the Employer, its intention

to bring to the site any Container filled with liquid or gaseous fuel or

explosive or petroleum substance or such chemicals which may

involve hazards. The employer shall have the right to prescribe the

conditions, under which such a container is to be stored, handled and

used during the performance of the works and the Contractor shall

strictly adhere to and comply with such instructions. The Employer

shall also have the right, at his sole discretion, to inspect any such

container or such construction plant/equipment for which materials in

the container is required to be used and dif in his opinion, its use is not

safe, he may forbid its use.

No Claim due to such prohibition or towards additional safety

provisions called for by him shall be entertained by the Employer.

Further, any such decision of the Employer shall not, in any way, absolve the

Contractor of his responsibilities under the Laws of land and in case use of

such a Container or entry there of into the Site area is forbidden by the

Employer, the Contractor shall use alternative methods with the approval of

the Employer without any cost implication to the Employer or extension of

work schedule.

11.3 Where it is necessary to provide and/or store petroleum products or

petroleum mixtures and explosives, the Contractor shall be responsible

for carrying out such provision and/or storage in accordance with the

rules and regulations laid down in Petroleum Act, 1934, Explosives

Act, 1948 or any other statuary acts in regard there of and

amendments thereof, and petroleum and carbide of Calcium Manual

published by the Chief Inspector of Explosives of India. All such

storage shall have prior approval of the Employer. In case, any

approval is necessary from the Chief Inspector (Explosives) or any

statutory authorities, the Contractor shall be responsible for obtaining

the same.

11.4 All equipment used in construction and erection by Contractor shall

meet Indian/International Standards land where such standards do not

exist, the Contractor shall ensure these too be absolutely safe. All

equipment shall be strictly operated and maintained by the Contractor


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in accordance with manufacturer’s operation manual and safety

instructions and as per any existing Guidelines/rules in this regard.

11.5 Periodical examinations and all tests for all lifting/hoisting equipment

and tackle shall be carried-out in accordance with the relevant

provisions of Factories Act 1948. Indian Electricity Supply Act and

associated Laws/Rules in force from time to time. A register of such

examinations and tests shall be properly maintained by the Contractor

and will be promptly produced as land when desired by Employer or by

the persons authorized by him.

11.6 The Contractor shall provide suitable safety equipment of prescribed

standard to all employees and workmen according to the need as may

be directed by the Employer who will also have the right to examine

these safety equipment to determine their suitability, reliability,

acceptability and adaptability.

11.7 The Contractor employing more than 250 workman whether temporary,

casual, probationer, regular or permanent or on contract, shall employ

at least one full time officer exclusively as safety officer to supervises

safety aspects of the equipment and workman.

The name and address of such Safety Officer of the Contractor will be

promptly informed in writing to the Employer with a copy to the Safety

Officer-Incharge before he starts work or immediately after any change

of the incumbent is made during currency of the Contract.

11.8 In case any accident occurs during the construction/erection or other

associated activities undertaken by the Contractor, thereby causing

any minor or major or total injury to his employees due to any reason

whatsoever, it shall be the responsibility of the Contractor to promptly

inform the same to the Employer and also to all the authorities

envisaged under the applicable laws.

11.9 The Employer shall have the right to stop the work, if in its opinion the

work is being carried out in such a way as may cause accidents and

endanger the safety of the persons and /or property. In such cases, the

Contractor shall be informed in writing about the nature of the hazards

and possible injury /accident and he shall remove shortcomings

promptly. The Contractor – after stopping the specific work, can if felt


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necessary, appeal against the order of stoppage of work to the

Employer within 3 days of such stoppage of work and the decision of

the Employer in this respect shall be conclusive.

11.10 The Contractor shall not be entitled for any damages /compensation

for stoppage of work due to safety reasons and the period of such

stoppage of work will not be taken as an extension of time for

completion of work and will not be the ground for waiver of any part of

Contractor’s liability for timely completion of the works.

11.11 The Contractor shall follow and comply with all safety rules, relevant

provisions of applicable laws pertaining to the safety of workman,

employees plant and equipment as may be prescribed from time to

time without any demur, protest or contest or reservation. In case of

any conflict between statutory requirement and safety rules referred

above, the most stringent clause shall be applicable.

11.12 If the Contractor fails in providing safe working environment as per

Safety Rules or continues the work even after being instructed to stop

work by the Employer, the Contractor shall promptly pay to the

Employer on demand, compensation at the rate of Rs. 5000/- per day

or part thereof till the instructions are complied with and so certified by

the Employer.

11.13 If the Contractor does not take all safety precautions and /or fails to

comply with the safety Rules as prescribed by the Employer or as

prescribed under the applicable law for the safety of the equipment,

plant and personnel and the Contractor does not prevent hazardous

conditions which may cause injury to his own employees or employees

of other Contractors, or Employer or any other person at site or

adjacent thereto, the Contractor shall be responsible for payment of

compensation in the form of first hand relief as per the following

schedule:-

a) Fatal Injury or Rs. 1,00,000/- :

accident causing per person : Applicable

death : for

death/injury


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b) Major injuries or Rs. 20,000/- : to any

person

accident causing per person : whosoever

25% or more

Permanent disability :

The contractor, however, shall be responsible for full amount of

compensation admissible as per the law of land

Permanent disability shall have the same meaning as indicated

in Workmen’s Compensation Act. The compensation mentioned

above shall be in addition to the compensation payable to the

workmen/ employees under the relevant provisions of the

Workmen’s Compensation Act and rules framed there under or

any other applicable law as applicable from time to time. In case

the Employer is made to pay any such compensation, the

Contractor will be liable to reimburse the Employer such amount

(s) even in addition to the compensation indicated above.

12. Code Requirements

The erection requirements and procedures to be followed during

the execution of the project shall be in accordance with the

applicable Indian / International standards /regulations, as

indicated in Technical Specifications, good engineering practice,

the Drawings and other applicable Indian codes, laws and

regulations.

SECTION –VII-C


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Technical Specification of Equipments

Sr. No

Description No.

1 APFC Panel with enclosure, Relay, Vaccum Contactor, Reactor 0.2% S.R, HT HRC Fuse 63/100 Amp. 11KV, all fittings, Panel, Busbar, Post insulator, Structure, Elect. Consumable etc. and all other Acc. Required.

CSC- XXXXIII/DH/UH/P&D/2009-2010

2 RVT

CSC- XXXXIII/DH/UH/P&D/2009-2010

3 VCB (with data downloadable type feeder meter as per specification no. Specification No. CSC-45/R-1/DH/UH/P&D/2010-2011) & control & Relay Panel

S-168/DD-177

4 3Core 185 mm.sq. 11KV XLPE (Power) Cable CSC- 44 /DH/UH/P&D/2009-

2010 5 2 C/ 1.5 mm.sq. Copper control cable 6 4 C/ 2.5 mm.sq. Copper control cable 7 19 C / 1.5 mm.sq. Copper control cable

Copy attached with tender documents

8 Cable Jointing Kit for 3Core 185 mm.sq.XLPE Power Cable

CSC-

XXXVI/DH/UH/P&D/2009-

2010

UTTAR & DAKSHIN HARYANA BIJLI VITRAN NIGAM

Specification No. CSC- XXXXIII/DH/UH/P&D/2009-2010

TECHNICAL SPECIFICATION

FOR

11 kV AUTOMATICALLY SWITCHED CAPACITOR BANKS AT

33/11kV SUB-STATIONS

Issue of the Month:

Common Specifications Committee UHBVN & DHBVN

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TECHNICAL SPECIFICATION 11 KV AUTOMATICALLY SWITCHED CAPACITOR BANKS AT 33/11KV SUB-STATIONS

FOREWORD:

11 KV capacitor bank controlled by manually switched devices like Isolators/Load Break Switch or circuit breakers has the following disadvantages as compared to modern automatically switched Capacitor Bank:

• The ON/OFF operation of capacitor bank depends on one operator and it is difficult to regulate switching the capacitor bank as per varying load condition resulting in sub-optimal utilization of the investment made.

• Quantum of reactive compensation in circuit can not be controlled in small steps.

• This results in over compensation or under compensation of reactive power at varying load conditions.

• Difficult to keep a close watch on various parameters such as current in each phase of the capacitor bank, system voltage, unbalanced operating conditions etc., to provide adequate protection to the capacitor bank against abnormal operating conditions thereby increasing the chances of capacitor failures.

• The scheme eliminates conventional components like RVT, Electro-Magnetic Relays etc.

• A modern SF6 or Vacuum type circuit breaker is a costly equipment and designed for isolating faults rather than for reactive power switching duty. The breaker, there-fore is not ideal equipment for control of capacitor bank which may have to be operated a large number of times in a day.

To overcome above shortcomings use of 11 KV capacitor switches (instead of circuit breakers) for operation of capacitor bank divided into suitable steps for optimum utilization is being adopted.

The Circuit Breaker is replaced by two Capacitor Switches for utilizing the capacitor bank in two or three steps as required.

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1. SCOPE:

1.1. This specification covers design, engineering manufacture, testing at manufacturer’s works, supply and delivery, erection, testing and commissioning of 11 KV outdoor types 3 phase capacitor banks at site for out door installation along with necessary equipments in all respect.

1.2. The specification covers 3 phase, 50 Hz, Out door type automatically switched shunt capacitor bank intended for installation at 11 KV side of 33/ 11 KV power transformers in various sub-stations. The equipment covered in this specification comprises Capacitor banks in steps, 0.2 % Series Reactors, Vacuum contactors, HT Fuses, RVT, CT, CRCA cubicle etc.

2. Climatic Condition:

1. Max. ambient air temperature 600C 2. Min. ambient air temperature (-)50C 3. Average Daily Max. ambient temperature 400C 4. Max. yearly weighed average ambient

temperature 320C

5. Max. altitude above mean sea level (Meters) 1000 6. Minimum Relative Humidity (%age) 26 7. Max. Relative Humidity (%age) 95 8. Avg. No. of Rainy days/year 120 9. Avg. annual rainfall 900 mm 10. Maximum wind pressure 195 Kg./m Sq.

3. Applicable Standard:

3.1. Unless otherwise modified in this specification, the capacitor shall comply with latest version of IS: 13925:1998. The other components such as Vacuum Circuit Breaker, Isolator, CT, PT, LA, Vacuum Contactors, HT fuses, Series Reactors, Auxiliary equipment shall comply with the latest version of relevant Indian Standards/International standards.

A. Capacitor banks:

The capacitor banks are for use in a 3 phase 50 Hz 11 KV system. Capacitor bank shall consists series/parallel combination of small units of capacitor cells per phase, each with an out put rating of 100 or 200 or 400 KVAR, 7.3 KV single phase. Capacitor units should be connected in externally star with appropriate number of capacitors in parallel as per requirement. For Example 3 single units connected in star to obtain 300/600 KVAR at 12.65 KV 3 phase or 2 capacitors units in parallel per phase with 3 phase connection in star to

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obtain 600 or 1200 KVAR at 12.65 KV 3 phase. Necessary number of steps should be provided to meet requirement given in the schedule.

Table 1.0: Capacitor Bank Rating:

Sr. No

Transformer Rating

Capacitor Bank Rating at 12.65 KV

Step configuration

kVAr X No. of units

I. 4000 KVA 1500 KVAR 1200 X 1+300 X 1

II 5000 KVA 1800 KVAR 1200 X 1+300 X 2

III 6300 KVA 2400 KVAR 1200 X 1+600 X 2

IV 8000 KVA 3000 KVAR 1200 X 2+600 X 1

V 10000 KVA 3600 KVAR 1200 X 2+600 X 1

VI 125000 KVA 4800 KVAR 1200 X 4

VII 16000 KVA 6000 KVAR 1200 X 5

VIII 20000 KVA 7200 KVAR 1200 X 6

Each capacitor unit shall be provided with external HT HRC fuse of 12 KV class with suitable current rating. Capacitor shall meet following specifications:

4. Temperature Category:

The capacitor shall be suitable for operation with upper limit of ambient temperature 60 0C.

5. Rated Voltage:

The rated voltage of 3 phase capacitor banks shall be 11 KV (phase to phase) and maximum operational voltage shall be rated for 12.65 kV.

6. Rated Output:

The Rated output of 3 phase capacitor banks shall be 600,1200,2400,3000,3600,4800,6000 or 7200 KVAR at the maximum operational voltage of 12.65 KV intended for use in suitable combination on power transformers rating of 4 MVA, 5 MVA, 6.3 MVA, 8 MVA, 10 MVA, 12.5

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MVA, 16 MVA & 20 MVA. The standard basic unit rating of capacitors (single phase) shall be 100/200/400 KVAR. The unit shall be connected in externally star formation with floating neutral.

7. Permissible Overloads:

For capacitor covered in this specification, the maximum permissible overloads with regard to voltage, current and reactive output shall not exceed the limits specified in IS:13925.

8. Power Loss:

The power loss in capacitors shall not exceed 0.2 watt / KVAR (Subject to tolerance of + 10 %).

9. Discharge device:

Suitable discharge device shall be connected across the capacitor unit in accordance with the provision of IS:13925. The discharge device shall reduce the residual voltage from the crest value of the rated voltage to 50 V or less within 10 Minutes after the capacitor is disconnected from the source of the supply..

10. Earthing Connections:

The container of each capacitor unit shall be provided with suitable earthing terminal clearly marked with “Earth” symbol.

11. Protective Fuses:

The capacitor units shall be provided with either internal or external fuses, as per standard practice of the manufacturer shall supply the external HRC fuses together with fixing accessories; a set of six spare fuse links shall be supplied along with each capacitor bank.

12. General Requirements:

The capacitor shall be of non-PCB type, using polypropylene film as the dielectric. Complete mounting brackets supporting insulators and all other components for formation of capacitor banks racks shall be supplied along with the capacitor units. Necessary foundation bolts/nuts shall also be supplied. The outside of the capacitor container and other structures should have smooth and tidy look and should be coated with the weather proof, corrosion-resistant paint of white or light grey.

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13. Marking:

The capacitor unit shall be provided with a rating plate and terminal markings as stipulated in IS: 13925.

14. TESTS:

The bidder shall submit the type test report along with the bid.The switched capacitors shall be subjected to all the type, routine and acceptance test in accordance with IS: 13925.

B. AUTOMATIC CONTROL UNIT

15. Switching Arrangement:

The Automatic control unit shall be provided inside the control room to continuously monitor total KAVR requirment on secondary side of the transformer and shall automatically switch ON or switch OFF the capacitor banks through the operation of 12 KV Vacuum Contactor. Overriding provision shall be made for electrical switching ON or OFF of the capacitor switch by the operator from the ACU control box.

16. Time Delay:

The switching ON operation will take place for period of 10 minutes. The switching OFF operation of relevant steps will be instantaneous.

17. Controls:

The Automatic control unit shall instantly switch OFF the incomer VCB of capacitor bank in the following contingencies occurring in any of the phases.

a) Voltage increased by 10% above the rated voltage of 11 KV.

b) Power transformer current impedance (due to single phasing and for any other reasons) between any of the two phases exceeding 20 % of the lowest.

c) Current increases in any capacitor unit by 30% above the rated current (only the relevant capacitor switch will open).

Current between any of the two phases of the capacitor bank differs more than 15% of the lowest current of the 3 phases (only the relevant capacitor switch will open).

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18. Monitoring Facility:

A suitable ammeter with selector switch to indicate the capacitor current in each phases of the capacitor bank shall be provided on the ACU panel inside the control room. Indicating lamps will also be provided to indicate ON & OFF status of each capacitor bank.

19. Control Power:

The DC control voltage for operation of the ACU shall be taken from sub-station battery. The standard DC control voltage at the 33/11 KV sub- station and 66/11 KV are 24 volts and 110 Volts respectively.

20. Temperature Variation:

The control equipment and associate circuitry shall be suitable for operation at an ambient temperature in the range of -5o C to (+) 60 oC.

21. Protection of ACU:

Besides in-built protection against lines surges and transient over voltages, suitable fuses shall be provided for protection against over current. The ACU shall remain fully functional during and after line surges and transient over voltages.

22. Control Unit Casing:

Except for the terminals, the ACU shall be enclosed in a suitable casing so as to avoid ingress of dust.

23. SCOPE

This specification covers 11 KV, 50 Hz, out-door type automatic capacitor switches suitable for switching capacitor banks of 300 KVAR, 600 KVAR and 1200 KVAR ratings or any other higher rating specified.

24. APPLICABLE STANDARDS

Unless otherwise stipulated in this specification the capacitor switch shall comply with the latest version of IS:9920 (AC Switches for voltages above 1000 V).

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25. RATED VOTAGE

The rated voltage for the capacitor switch shall be 12 KV. This represents the highest system voltage corresponding to the nominal system voltage of 11 KV.

26. RATED CURRENT

The standard rated normal current shall be 200A.

27. RATED CAPACITIVE SWITCHING CURRENT

The rated capacitive switching current shall not be less than 100A. Note: The capability of the switch shall also take into account the parallel switching of capacitor bank steps.

28. RATED SHORT TIME CURRENT

The rated short time symmetrical current for 1 second shall be 10KA (rms A.C.component).

29. RATED MAKING CURRENT

The rated making current shall be 2.5 times the rms value of the a.c. component of rated short time capacity.

30. BASIC IMPULSE LEVEL (BIL)

The rated basic impulse level of switch to earth as also across the open terminals shall be 75 KV.

31. CONTROL SUPPLY

The control power for closing the switch shall be 230 V single phase AC supply. The closing mechanism shall be suitable for a voltage variation of (+) 10% to (-)20%.

32. DESIGN & CONSTRUCTION REQUIREMENSTS

32.1. TYPE

The switches shall be of either vacuum or SF6 type.

32.2. The capacitor switches shall be of three phase construction and shall be suitable for remote operation.

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32.3. The capacitor switch shall be suitable for outdoor installation and shall have sealed weather proof type construction.

32.4. The capacitor switch shall be provided with a mechanical indicator to show whether the contact is in open/closed position, locally, as also through indication on the ACU panel. Provision shall also be made for manual closing and opening.

32.5. The metallic enclosure of the capacitor switch shall be provided with two earthing terminals marked with the earth symbol.

32.6. The bushing provided on the switch shall have clamp type of terminals to directly receive aluminium conductors up to 10mm dia in both horizontal and vertical directions. The terminal arrangement shall be such as to avoid bimetallic corrosion.

33. OPERATING MECHANSIM

The operating mechanism shall be either solenoid or motor charged spring for which the control supply shall be as per clause 30.

34. MECHANICAL AND ELECTRICAL ENDURANCE

The switch shall be capable of performing not less than 10,000 mechanical operations and 10,000 electrical operations at 100A capacitive current without getting damaged.

35. MARKING

The capacitor switch shall be provided with a legible and indelibly marked name plate with the following:

a) Name of the manufacturer.

b) Type, designation and serial number.

c) Rated voltage and current.

d) Rated frequency.

e) Number of poles.

f) Rated short time current (symmetrical).

g) Rated making current.

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h) Rated capacitive switching current.

36. TESTS

The switch shall be subjected to the following tests in accordance with the IS:9920 (Part-IV).

36.1. Type Tests

a) Tests to verify the insulation level, including withstand tests at power frequency voltages on auxiliary equipment.

b) Tests to prove that the temperature rise of any part does not exceed the specified values.

c) Making and breaking tests including tests for the rated capacitive current.

d) Tests to prove the capability of the switch to carry the rated short time current.

e) Tests to prove satisfactory operation and mechanical/electrical endurance.

36.2. Routine Tests

a) Power frequency voltage dry tests.

b) Voltage tests for auxiliary circuits.

c) Measurement of the resistance of the main circuits.

d) Tests to prove satisfactory operation.

D. AUXILARY EQUIPMENTS

37. Isolator:

37.1. The Isolator shall be outdoor type, 11 KV, 400/630/800Amp, Single throw Double Break, off load type, triple pole, vertical gang operated switch and with earth switch.

37.2. Tests: The Isolator shall be type tested and shall be subjected to routine and acceptance test in accordance with IS: 1818-1972.

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37.3. The bidder shall submit guaranteed technical particulars along with their bid.

38. 11 KV Indoor Vacuum Circuit Breaker with Panel:

1.0 Scope: The specification covers supply and installation of 3 pole, 50Hz at 11KV, 250 MVA rupturing capacity, 400/630/800 Amp rated current. Vacuum circuit breaker having motor operated spring changing mechanism and electrical as well as manual closing facility for indoor installation matching / in conjunction with existing 11 KV panels including all necessary equipment such as CT(S) as per rating of capacitor bank, PT(S) and instruments such as Ammeter, Voltmeter and devices like relays as follows.

i) One No of Voltmeter (0-15 KV), 3 Nos. Ammeter of size (144 X144mm) of range 0-400/800Amp shall be fitted with each panel.

ii) Relays:

a) Over Current = 2 Nos. + Earth Fault = 1 No combined one unit

b) Over Voltage Protection:

c) Unbalance Protection: (VDG-14)

d) No voltage / Under Voltage Protection.

e) Auxiliary relays to suit the purpose.

1.1 Rating: The VCB shall comply with the following requirements:-

i) Nominal System Voltage: 11 KV.

ii) Maximum System Voltage: 12 KV.

iii) Rated Current: 400A/630A/800A.

iv) Frequency: 50 Hz.

v) Insulation level: 28 KV (rms) / 75 KV (peak).

vi)Operating Mechanism: Spring Charged Motor.

vii) Auxiliary Voltage: 110 V DC & 240 V AC.

viii) Cree page Distance: 25 mm/KV

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1.2 Tests: The Vacuum Circuit Breaker shall be type tested and shall be subjected to routine and acceptance test in accordance with IS: 13118.

1.3 Guaranteed technical Particulars: - The bidder shall submit guaranteed technical particulars along with their bid.

39. Current Transformer:

1.0 The current transformers shall be dry type, suitable current ratio and burden for measuring the capacitor current shall form part of the equipment to be supplied. These CT’s shall be form an either an integral part of Indoor VCB or integral part of Capacitor bank enclosure or may be separate outdoor type on structure. The accuracy class for the purpose of measuring the current shall be1.0.

1.1 Tests: The Current Transformer shall be type tested and shall be subjected to routine and acceptance test in accordance with IS: 2705.

1.2 The bidder shall submit guaranteed technical particulars along with their bid.

40. Lightning Arrestor:

1.0 The specification covers the supply, delivery, erection, testing & commissioning of 9 KV, 5 KA, static class heavy rating, gapless, metal (zinc) oxide surge arrestors complete along with clamps, complete fitting and accessories for installation on outdoor type 11 KV switchgear, transmission lines, transformers etc.

1.1 Tests: The Lightning Arrestors shall be type tested and shall be subjected to routine and acceptance test in accordance with IS: 3070.


41. Residual Voltage Transformer:

1.0 The Residual Voltage Transformer shall be dry type, 11 KV class, 5 Limb, with three windings i.e. Star/ Star – Open delta. The Primary winding-I in Star, Secondary-I in Star for metering and Secondary-II in Open delta for protection.

1.1 Tests: The residual Voltage Transformer shall be type tested and shall be subjected to routine and acceptance test in accordance with IS: 3156.

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42. Vacuum Contactors:

1.0 The Vacuum contactor shall be 12 KV Class, 400 Amps, Three pole Vacuum contactors suitable for capacitor switching. It shall be electrically (solenoid) operated with operational voltage of 230 Volts AC or 110V DC and short time current rating of 9 KA for 1 Sec.

1.1 Tests: The vacuum contactors shall be type tested and shall be subjected to routine and acceptance test in accordance with IS/IEC.


43. HT HRC Fuses:

1.0 Suitable indoor type 11 KV HRC fuses along with the mounting insulators etc. to provide proper protection for the entire installation shall form part of the equipment to be supplied. The rupturing capacity of the fuses shall be 12.5 KA.

44. Series Reactors:

1.0. 0.2 % Series reactor per phase per step of capacitor rating for inrush current restriction to be connected on neutral end as per IS: 5553. The rated voltage shall be 12 KV. The reactor shall be dry type single phase reactors mounted on post insulators and designed to carry 130 % of rated current continuously without exceeding the temperature rise & shall be applicable for thermal class of insulation used. The reactor shall be mounted inside outside the capacitor cubicle on foundation.

1.1 Tests: The series reactor shall be type tested and shall be subjected to routine and acceptance test in accordance with IS: 5553.


45. 11 KV HT Cable (XLPE):

A Power Cable:

1.0 11 KV power cable shall be hot cured XLPE of following size conforming to IS: 7098 (P-II) amended latest. 11 KV Incoming: Three/Single core, 95/125/240/400 Sq. MM. 11KV (E). Jointing kit shall be heat shrink type as

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per latest relevant IS specification for indoor and out door utilization matching with the above cables.

1.1 Cable Jointing: - Jointing should be heat shrink type. All materials required for such type of jointing of XLPE cable shall be supplied by the contractor.The work shall be carried out only by licensed / experienced cable jointer holding necessary license of cable jointing of appropriate grade. Sufficient surplus cable in the form of loop shall be left on both sides of the cable.

B Control cable:

The control cable shall conform to IS: 1554 (Part-I) 1976. All control cable shall be of copper and armored type. The bidder may furnish cable such schedule after finalization of sub-station layout, associated cable connection.

46. Capacitor Cubicle: It shall be free standing outdoor type sheet steel enclosure fabricated from 2 mm. thick CRCA sheets. Capacitor cubical shall be mounted on mild steel channel frame and base frame shall be provided with mounting holes for fixing on concrete foundation. All doors and covers shall be designed to avoid ingress of water, moisture, dust etc. and shall be provided with suitable gaskets to achieve IP-55 degree of protection. Covers and doors shall be provided with electrical interlocks to avoid access to live parts. In case some unauthorized person opens the door or covers, the main incomer breaker should be tripped. Viewing glasses shall be provided to view inside parts like fuses, contactors. CFL type internal panel lighting shall also be provided to have proper view in the night. Capacitor enclosure shall be duly painted with base coat of Epoxy based primer and final coat of polyurethane paint. FRP canopy shall be provided at the top and which projects about 200 mm beyond cubicle on all sides. All LT internal wiring shall be fire retardant cable of 2.5sq.mm. All cable entries shall be from bottom through cable glands of suitable size. HT XLPE cable entry shall be through a cable entry box mounted on cubicle or fixed separately on foundation and coupled to the cubicle. Necessary Danger plate & Name plate etc shall be provided at prominent places. All other necessary fittings and accessories should be provided by manufacturer to ensure safe and smooth operation of the equipment.

47. SUBMISSION AND APPROVAL OF DRAWINGS:

Following drawings and technical documents shall be submitted along with the bid.

• Technical data sheet • GA drawings. • Bill of Material. • General Technical Particulars.

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48. INSTALLATION OPERATION AND MAINTAINANCE:

The supplier shall provide:

1) Necessary manual on installation, operation and maintain ace as also the schedule for the routine testing or check ups of all the equipments covered by the installation.

2) List of recommended spares indicating prices and specialized test equipments required for the routine testing of the system.

49. GUIDANCE FOR PROCUREMENT:

The entire equipment covered under this specification shall be covered as a single package to avoid the problem of mismatching for maintenance etc.

50. WARRANTY:

The suppler shall guarantee satisfactory performance of the complete capacitor bank installation for a period of 18 months from the date of supply or 12 months from the date of commissioning, which ever is earlier. During the warranty period all repairs/replacements shall be carried out free of cost.

51. INSPECTION:

All tests and inspection shall be made at the place of the manufacturer unless otherwise especially agreed upon by the manufacturer and the purchaser at the time of purchase. The manufacturer shall afford the inspector representing the purchaser, all reasonable facilities, without charge, to satisfy him that the material being supplied is in accordance with the specification.

The purchaser has the right to get the tests carried out at his own cost from an independent agency, whenever there is a dispute regarding the quality of the supply.

The manufacturer shall be responsible to pay penalty of Rs 20,000/- for each occasion at which the fake inspection call has been made or the material is rejected during testing/inspection by the authorized agency/representative of the Nigam. This penalty would be in addition to the

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expenses incurred by the Nigam in deputing the Inspecting Officer, carrying out such inspection

52. Challenge Clause:-

The material offered/received after the inspection by the authorized inspecting officer may again be subjected to the test for or any parameter from any testing house/in-house technique of the Nigam & the results if found deviating un-acceptable or not complying to approved GTP’s the bidder shall arrange to supply the replacement within thirty (30) days of such detection at his cost including to & fro transportation. In addition , penalty @10% of cost of the inspected lot of material shall be imposed.

Director/Technical-I, UHBNV, Panchkula

Director/Project,DHBVN, Hisar

CGM/PD&C, UHBVN, Panchkula

CGM/P&D, DHBVN, Hisar.

FA & CAO/MM, UHBNV, Panchkula

FA & CAO/MM, DHBVN, Hisar

GM/P&D, UHBNV, Panchkula

GM/P&D, DHBVN, Hisar

Page 16 of 16

DAKSHIN HARYANA BIJLI VITRAN NIGAMOffice of the Chief General Manager/P&D,

Vidyut Sadan, Vidyut Nagar, Hisar-125005

Tel: 01662-221285, 221830 (GM/P&D) Fax: 01662-220481

Technical Specification No.- S-168/DD-177

11 KV Switchgear Panel

Vacuum Type

Issue of Month: Feb. 2008 Chief General Manager/P&D DHBVN, Hisar

3

TECHNICAL SPECIFICATION FOR 11 KV SWITCHGEAR PANELS VACUUM TYPE WITH 11KV CAPACITOR CONTROL PANELS

1. SCOPE:

This specification covers the design, manufacture, assembly, testing at manufacturer’s works before dispatch, supply and delivery FOR destination of 350MVA, 11KV Vacuum type switchgear panels with 11KV capacitors control panel. 2. STANDARDS:

The Switchgear panels shall comply in all respects the requirement laid down in the latest editions of IS-3427, IS-3231, IS: 2705, IS: 3156 & IS-13118-199. 3. CLIMATIC CONDITIONS:

The equipment is required to operate satisfactorily under the following site conditions:

3.1 Max. Ambient Temperature 60 ºC 3.2 Min. Ambient Temperature -5 ºC 3.3 Max. Relative humidity 100% 3.4 Min. Relative humidity 26% 3.5 Average no. of rainy days per annum Nearly 120 days 3.6 Average annual rainfall 900 mm 3.7 Average number of dust storm days per annum 35 3.8 Isoceraunic level 45 3.9 Max. Wind pressure 195Kg / sq. meter

3.10 Altitude above mean sea level Less than 1000 meter 4. TYPE AND RATINGS:

The 11KV Switchgear panels shall comprise of 11KV Vacuum Type circuit breakers,

control relay panel, instrument panel and instrument transformers (complete in all respect) etc., suitable for indoor use. The equipment shall be totally enclosed in metal clad cubical, dust and vermin proof with necessary isolation arrangement. Each panel shall be easily extensible on either side and should be complete with necessary internal copper connections, small wiring, L.T. fuses and supporting framework with bolts to secure it to the floor. Each panel shall be provided with space heater, door switch with lamps and 15 - Ampere power receptacle.

The breakers shall have the following ratings: 4.1 Type Vacuum type 4.2 No. of poles 3 4.3 Nominal System Voltage 11 KV 4.4 Highest System Voltage 12 KV 4.5 Rated frequency 50+1.5Hz 4.6 Rated continuous current rating at Ambient

temperature, as specified in IS: 13118 -1991 800 Amp for incoming; 400 Amp for outgoing feeders

4.7 Symmetrical breaking capacity 350 MVA 4.8 Impulse withstand test voltage 75 KV (peak) 4.9 One minute power frequency withstand test

voltage 28 KV (rms)

4.10 Short time current rating Not less than 18.4 KA for 1 Second. 4.11 System neutral Solidly earthed

4

5. GENERAL DESIGN OF SWITCHGEAR PANELS:

5.1 OPERATING MECHANISM:

The vacuum type circuit breaker shall be trip free and the breaker control shall be draw out type. The VCBs shall be suitable for operation from 24 DC auxiliary supply. The operating mechanism shall be motor operated spring charged type. There shall be provision (s) for manual charging of closing spring and emergency hand trip. The motor used for the purpose will be suitable for 240 V AC. All auxiliaries shall be supplied from AC and arrangement shall be made for automatic switch over to DC in case of AC supply failure. The operating mechanism shall works satisfactorily between 85 -110% of rated supply voltage.

5.2 INSTRUMENT PANELS:

Each unit shall have its own instrument panel provided at the top & complete with small wiring connections from relays, instrument transformers, metering instruments, indicating instruments, selector switches & circuit breaker control switch. All wiring shall be carried out by using stranded single annealed copper conductor, insulated with poly vinyl chloride insulation suitable for 650 V service and in accordance with IS: 732 - 1963. CT/PT circuits shall use wire of not less than 2.5 mm² cross - sectional area whereas control/alarm/supervision circuit shall use wire of not than 1.5 mm² cross - sectional area. All wires will be continuous from one terminal to the other and also will have no T - Junction enroute. The connections shall be securely made with the help of suitable connecting lugs duly crimped on the copper conductor. The meters and relays shall be mounted in a convenient position so as these are readily accessible for inspection or repair. The terminal board provided in the instrument panel of VCBs will be made of molded dielectric having brass studs, washers, holding nuts & locking nuts. All holding nuts shall be secured by locking nuts. The connection studs shall project 6 mm from the lock nut surface. No OTHTER TYPE OF TERMINAL BORAD IS ACCEPTABLE. The panels shall have a degree of protection of IP - 4X. The leads from the metering CTs shall be directly terminated at TTB and there from at the KWH meter with a provision to seal TTB and KWH meter. The said CT leads will be effectively concealed to prevent their tempering enroute as well as at TTB. Similarly PT leads from secondary box of the PT to TTB & there from to energy meter, including inter panel PT leads, will also be effectively concealed to prevent their tempering. The mode and extent of concealing the metering leads of CTs & PTs, to prevent their tempering (by unscrupulous operating personnel), will be discussed and mutually agreed upon with the successful bibber (s). TTB, used on the instrument panel, should be suitable for front connections.

Earthing of current free metallic parts or metallic bodies of the relays switches

mounted on the instrument panel and metal enclosed switchgear shall be done by a suitable sized copper conductor. Earth bus made of 25 X 3 mm bare copper flat will be extended through entire length of 11KV switch-board with suitable provision to connect it to the sub-station earth at the extremities. The earthing arrangement will meet with the requirements laid down in IS: 3427, read with its latest amendments.

5.3 INSTRUMENT TRANSFORMER:

The secondary voltage & current rating of the instrument transformers shall match with the metering and protective equipment. The CTs shall have ratio & accuracy class as mentioned in the schedule of requirement. The CTs shall be wound/ring type in accordance with their ratings. The terminal boards, associated with REF CTs & Over Current / Earth Fault Protection CTS will be of disconnecting type, having short circuiting facility & thus facilitate secondary testing of concerned protective relay without disturbing the associated small wiring. Interchangeability of housing of CTS, from one panel to another, must be ensured. A resin cast potential transformer of ratio (11000√3)/(110√3) volts, having 100 VA output per phase with

5

accuracy class 0.5 as per ISS: 3156 (Part-II) – 1965, shall be provided on the incoming side of each panel set and shall be star / star connected. It shall be provided with HT and LT fuses.

The neutral point, of star connected secondary windings of instrument transformers, shall be earthed to the main earth bus referred to in concluding paragraph of clause 5.12. Multiple earthing of any instrument transformers shall be avoided.

5.4 BUS – BAR:

All the panels shall be provided with insulated copper bus bar of 800 Amps

current rating for all switch boards. These shall be connected in a separate moisture and vermin proof sheet metal chamber. The bus - bar connection & insulator supports shall be mechanically strong & rigidly supported so as to withstand the stresses, generated by vibrations, variation in temperature and severe short circuits. The bus - bar should be in horizental formations to enable DHBVN to connect with existing Circuit Breaker Panel Board without any difficulty in matching. The Adopter Panel, if required to match the loose panel with the existing panels, shall be prepared / fabricated as per site conditions by the Nigam at its own cost.

The bus - bar shall be supported on insulator at short intervals, keeping adequate

clearance between the bus bar and earth. The bus - bar chamber shall be provided with inspection cover with gaskets & bus bar shutters. Provision shall be made for future extension of bus bar & switch board.

5.5 LIMIT OF TERPERTURE RISE:

The temperature rise, of current carrying parts, shall not exceed the permissible limits above the ambient temperature as per relevant standards (latest edition).

5.6 BUSHING INSULATORS:

These shall comply with latest version of IS: 2099 in all respects.

5.7 DISCONNECTORS OF CIRCUIT BREAKER & THEIR INTERLOCKS:

All disconnector’s (isolators) of 11KV VCBs & interlocks between different pieces of apparatus, provided for reasons of safety & for convenience of operation of switchgear, shall meet with the requirement of IS: 3427 - 1969 read with its latest amendment.

5.8 CABLE BOXES:

Each 11 KV incoming VCBs shall be provided with cable boxes, complete with

jointing kits & sealing material for receiving 3 Core, 11 KV XLPE type outer PVC sheathed cable of size 630 mm² (Panel with CT ratio 400 - 200/5 – 5 – 5 A). The outgoing 11KV VCBs, including 11KV capacitor controlling VCB, shall be provided with cable boxes suitable to receive 3 Core, 11 KV XLPE type outer PVC sheathed cables of size up to 300 mm² (Panel with CT ratio 300 - 150/5 - 5A). The 11 KV station transformer VCB shall be provided with cable boxes ( Epoxy Resin Type ) suitable to receive 3 Core, 11KV XLPE type outer PVC sheathed cables of size up to 50 mm² (Panel with CT ratio 60 - 30/5 - 5A). Each cable box shall have vertical entry from below. These cable boxes shall be complete in all respects, including cable glands of requisite size. It is clarified that one jointing kit/cable box is required to connect one 11KV XLPE cable with one 11KV VCBs. No separate (extra) jointing kit is required.

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5.9 RELAYS:

All the relays, except the relays for DC failure alarm, supervision alarm, annunciation scheme, shall be draw out type and mounted on the front of each circuit breaker control panel in a flush pattern case. All relays shall be provided with testing facilities. In case the same can not be provided within the relay, a separate test block and test plugs shall be provided. The relay adjustment devices shall be easily accessible when the relays have been mounted on the panels.

The relays shall conform to the latest edition of IS: 3231. The relays shall not operate at a current equal to or less than the setting. The minimum operating current shall not exceed 110% of the setting. The coils & CT circuit of the relay should be suitable to withstand the minimum operating current continuously, in case the minimum operating current is around 110%. The relays covers and cases shall be dust tight, moisture and vermin proof. Operation Indicators shall be provided on all relays and on their immediate auxiliaries for indication, regarding type of fault and phase involved. It shall be possible to reset the operation indicator, without opening the relays covers. All relays shall be tested at manufacturer’s works and test certificates got approved, before dispatch of material. The bidder shall submit the descriptive and pictorial literature, in quadruplicate, in respect of each relay proposed, along with the tender. All relays in the specification shall be suitable for 24 V DC auxiliary voltages.

5.10 ALARM EQUIPMENTS:

The incoming feeder panel shall be provided with one alarm bell and alarm indicating auxiliary relays. It shall indicate tripping of circuit breaker, under fault conditions, with the help of auto trip lamp and alarm. It shall be complete with the indicating lamp and push button switches for “Accepts” and “Resets” alarm.

5.11 SUPERVISION SCHEME:

11KV switches panels, covered by this specification, shall be provided with the following lamp indication:

Circuit breaker ‘Open’ Green Circuit breaker ‘Close’ Red Auto trip White Spring Charged Blue

For monitoring the trip circuit healthy conditions, both in open and close position

of the circuit breaker, 1 No. trip circuit supervision relay is proposed. In case of trip circuit being faulty, the operation of this relay shall be accompanied by audio - visual annunciation. It shall be possible to silence the buzzer by pressing the accept push button but the lamp shall continue to glow till the fault has been attended.

Circuit breaker ‘Close’ & ‘Open’ lamps shall be wired so as to be on 240 V AC

under ‘normal’ condition.

5.12 METERING SCHEME:

The 11 KV Incoming VCB will be provided with a digital Voltmeter along with a selector switch. The selector switch shall facilitate the measurement of Phase - Phase and Phase - Neutral voltage, one by one. The static voltmeter shall be rated for 110 V (Phase – Phase Voltages). The instrument shall be static type of industrial grade “A” classification with accuracy class 1.0 & shall confirm to IS: 1248 (1968).

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Each of the 11 KV VCB Panel will be provided with a suitably sealed digital ammeter, rated for 5Amp (additional dials; if any, required to cover all the taps of the CTs, shall be included at the time of bidding) & a selector switch, facilitating measurement of phase currents. The instrument shall be of static type, industrial grade “A” classification, having accuracy class 1.0 & shall conform to IS: 1248 (1968)

Each of the 11 KV VCB, except the 11 KV capacitor VCB, will be equipped with a

three phase four wire static trivector meter (Confirming to Technical Specification no. S – 45 / SE / P & D / XEN / DD – II; Static CT / PT Operated Trivector Meter for 11 KV Feeders) & suitable for three phase four wire unbalanced load conditions with accuracy class 0.5 and having RS – 232, RS – 485 Port for Data – Logging / Data -Downloading facility . The trivector meter shall be rated for 5 Amp CT secondary and 110/√3 V (phase to neutral), available from 11 KV PT mounted on the incoming VCB.

Each of the 11KV VCB will be provided with a static power factor meter. The

static PF meter, having range of 0.5 lag – one - 0.5 lead, shall be of static type; suitable for use on three phase three wire unbalanced system. It shall be rated for 5A CT secondary & 110 Volts (Phase – Phase Voltage), having accuracy class 1.0 with digital display. NOTE: Routine test certificates of all the indicating & integrating instruments will be submitted

along with the routine test certificates of 11 KV switchgear.

5.13 PADLOCK: Padlock or some other arrangement of approved design shall be provided for

locking the equipment in ‘OFF’ position. All locks shall have two keys, in addition to the master key which shall be provided for each panel set. Approved racks or cabinets, for accommodation of padlocks and keys while in use, shall be provided along with each panel set and it shall be suitably labeled and numbered for identification.

5.14 AUXILIARY SWITCHES:

In addition to the auxiliary contacts required for normal operation, each circuit breaker shall be provided with 2 NO & 2NC spare auxiliary contacts duly wired up to terminal block.

5.15 MONITORING FROM REMOTE:

Suitable arrangement should be provided to make it possible to monitor the

following conditions of the 11 KV VCB at the remote end, through a communication system to be provided by the Nigam.

Sr. No. CONDITIONS

1 D C is healthy 2 Breaker is off 3 Breaker is on 4 Breaker is mechanically free to close 5 Spring, for closing mechanism, is charged 6 Trip Circuit is healthy 7 Breaker is not anti pumping 8 Tripping of Breaker with the operation of Instantaneous High Set Element,

installed on Phase & Earth Fault Units, indicating the Phase or Earth Fault involved

9 Tripping of Breaker with the operation of Inverse Definite Minimum Time Unit,

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installed for Phase & Earth Fault , indicating the Phase or Earth Fault involved 10 Breaker has not tripped with the operation of Master Trip Relay (Applicable for 11

KV VCB only) 11 Bus Bar is charged (Not applicable for 11 KV Incoming VCB)

5.16 CLOSING FROM REMOTE:

Suitable arrangement should be provided to make it possible for the Nigam to

close 11 KV VCB from the remote end, through a communication system to be provided by the Nigam, in case the following conditions are satisfied.

Sr. No. CONDITIONS

1 D C is healthy 2 Breaker is Off 3 Breaker is mechanically free to close 4 Spring, for closing mechanism, is charged 5 Trip Circuit is healthy 6 Breaker is not anti pumping 7 Breaker has not tripped with the operation of Instantaneous High

Set Element 8 Breaker has not tripped with the operation of Master Trip Relay

(Applicable for 11 KV VCB only) 9 Bus Bar is charged (Not applicable for 11 KV Incoming VCB

5.17 TRIPPING FROM REMOTE:

Suitable arrangement should be provided to make it possible for the Nigam to trip 11 KV VCB from the remote end, through a communication system to be provided by the Nigam, in case the breaker is on & certain preset conditions, to be decided later on.

6. PROTECTION SHEMES:

6.1 FOR INCOMING PANELS:

Each incoming panel shall be provided with a single pole restricted earth fault relay, suitable for 5 Amps C.T. Secondary, with a setting range of 10% to 40% of 5 Amp (strictly in steps of 5%). The relay shall be housed in draw out flush pattern case.

The back up protection shall be in the form of combined over current and earth

fault relay, consisting of two over current & one earth fault unit which shall be triple pole having inverse definite minimum time (I.D.M.T.) characteristics with a 3/10 time current curve i.e. the relay operating time shall be 3 Second at 10 times the plug setting with T.M.S = 1. The two outer elements of the relay shall be arranged for over current protection and shall have a setting range of 50 - 200% of 5 Amps, adjustable in suitable equal steps by means of plug boards. The central element shall be used for earth fault protection with a setting range of 20 - 80% of 5 Amps, adjustable in suitable equal steps by means of a plug board. Each of the three elements shall be fitted with shunt reinforcing unit with hand reset operation indicator.

Two nos. over current high set instantaneous elements, having setting range of

500 - 2000% of 5A and one no. earth fault high set instantaneous element, having setting range of 200 -800% of 5A and adjustable in suitable steps, shall be wired in series with the IDMT type over current and earth fault relay respectively . The high set instantaneous element shall have low transient over reach with a high pickup / drop out ratio. The high set instantaneous element shall

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be so wired so as to take this element (instantaneous) out of circuit, if so desired by the Nigam, at any time during the operation of equipment.

6.2 FOR OUTGONG FEEDER PANELS:

The back up protection shall be in the form of combined over current and earth fault relay, consisting of two over current & one earth fault unit which shall be triple pole having inverse definite minimum time (I.D.M.T.) characteristics with a 3/10 time current curve i.e. the relay operating time shall be 3 Second at 10 times the plug setting with T.M.S = 1. The two outer elements of the relay shall be arranged for over current protection and shall have a setting range of 50 - 200% of 5 Amps, adjustable in suitable equal steps by means of plug boards. The central element shall be used for earth fault protection with a setting range of 20 - 80% of 5 Amps, adjustable in suitable equal steps by means of a plug board. Each of the three elements shall be fitted with shunt reinforcing unit with hand reset operation indicator.


500 - 2000% of 5A and one no. earth fault high set instantaneous element, having setting range of 200 -800% of 5A and adjustable in suitable steps, shall be wired in series with the IDMT type over current and earth fault relay respectively . The high set instantaneous element shall have low transient over reach with a high pickup / drop out ratio. The high set instantaneous element shall be so wired so as to take this element (instantaneous) out of circuit, if so desired by the Nigam, at any time during the operation of equipment.

6.3 FOR STATION TRANSFORMER FEEDER PANEL:

The back up protection shall be in the form of combined over current and earth fault relay, consisting of two over current & one earth fault unit which shall be triple pole having inverse definite minimum time (I.D.M.T.) characteristics with a 3/10 time current curve i.e. the relay operating time shall be 3 Second at 10 times the plug setting with T.M.S = 1. The two outer elements of the relay shall be arranged for over current protection and shall have a setting range of 20 - 80% of 5 Amps, adjustable in suitable equal steps by means of plug boards. The central element shall be used for earth fault protection with a setting range of 10 - 40% of 5 Amps, adjustable in suitable equal steps by means of a plug board. Each of the three elements shall be fitted with shunt reinforcing unit with hand reset operation indicator.


200 - 800% of 5A and one no. earth fault high set instantaneous element, having setting range of 100 - 400% of 5A and adjustable in suitable steps, shall be wired in series with the IDMT type over current and earth fault relay respectively . The high set instantaneous element shall have low transient over reach with a high pickup / drop out ratio. The high set instantaneous element shall be so wired so as to take this element (instantaneous) out of circuit, if so desired by the Nigam, at any time during the operation of equipment.

6.4 FOR 11KV CAPACITOR CONTROL PANEL:

The 11KV capacitor control panel shall be provided with the following protection. 6.4.1 The back up protection shall be in the form of combined over current

and earth fault relay, consisting of two over current & one earth fault unit which shall be triple pole having inverse definite minimum time (I.D.M.T.) characteristics with a 3/10 time current curve i.e. the relay operating time shall be 3 Second at 10 times the plug setting with T.M.S = 1. The two outer elements of the relay shall be arranged for over current protection and shall have a setting range of 50 - 200% of 5 Amps, adjustable in suitable equal steps by means of plug boards. The central element shall be used for earth fault protection with a setting range of 20 - 80% of 5 Amps,

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adjustable in suitable equal steps by means of a plug board. Each of the three elements shall be fitted with shunt reinforcing unit with hand reset operation indicator.

6.4.2 For the protection of the bank against unbalancing, an inverse time

Neutral Voltage displacement relay having setting 5.4, 7.5, 12.5 and 20 volts and suitable for 190 V AC operation shall be provided. The relay will be fed from the open delta connected secondary of residual voltage transformer (Discharge coil) and shall have suitable setting range to afford adequate protection to the capacitor bank against unbalancing.

6.4.3 For over voltage protection of the capacitor bank, over voltage relay;

having setting range of 110% to 170% in steps of 10% & rated for 110 Volts A.C. supply, obtainable from the secondary of 11KV Bus P.T’s mounted on 11KV Incoming Panel shall be provided.

6.4.4 For under voltage protection of the capacitor bank, under voltage relay;

having setting range of 50% to 90% in steps of 10% & rated for 110 Volts A.C. supply, obtainable from the secondary of 11KV Bus P.T’s mounted on 11KV Incoming Panel shall be provided.

6.4.5 10 minute adjustable timer contact shall be wired in series with the

closing circuit so as to ensure that the capacitor bank is fully discharged, once it has been switched OFF.

7. FREQUENCY OF OPERATION:

Mostly the VCB panels are expected to be used for feeding heavily concentrated

load. As such they are expected to be subjected to frequent tripping due to overload & earth fault. Any specific design features, adopted or proposed to be provided, by the bidder in the switchgear on this account should be indicated clearly in the tender. 8. TESTS:

All type tests & routine tests shall be carried out in accordance with IS: 13118

/1991 (Latest version thereof). The type test certificate shall be supplied as per IS: 13118 / 1991, in

quadruplicate along with the tender to judge the adequacy of the equipment offered. In case the offered equipment varies in its details vis-à-vis the certified copy of the drawing annexed with the Type Test Report, the bidder (s) will be required to submit the fresh Type Test Reports. The date of Type Test Report shall be within five years from the date of opening of the bids against this specification. The following Type Tests in respect of VCBs are required to be submitted along with the tender.

8.1 Lightning & switching Impulse voltage test 8.2 Power frequency voltage Test (Dry & wet) 8.3 Temperature rise test 8.4 Measurement of Resistance of main circuit 8.5 Short Time withstand 8.6 Peak withstand current 8.7 Mechanical operation test at Ambient air temperature. 8.8 Basic short circuit test duties (Test duties 1,2,3,4 a, 4 b, 5) and Critical current Test 8.9 Capacitor current switching test

The tenders, without Type Test Certificates of the offered equipment, are liable to

be rejected. The Type Test Certificates for CTs & PTs, as stipulated in the latest version of IS:

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3156 & IS: 2705, can be supplied by the successful Bidder after placement of the purchase order, being bought out items.

The PT’s and CT’s shall be subjected to routine tests, as specified in the latest version of relevant ISS in the presence of purchaser - authorized representative, if so desired by the purchaser. The routine test certificates of the bought out component such as relays, switches, indicating instruments & KWH metering will also be presented to DHBVN’s authorized inspecting officer who will forward the same to the purchaser along with his inspection report for the main equipment. All test reports should be got approval from purchaser before dispatch of equipment.

9. DRAWINGS & LITERATURE:

In addition to any other drawing, which the bidder may like to furnish to explain

the merits of his proposal, following drawings shall be submitted along with the tender in quadruplicate:-

9.1 Principal Dimensional Details of 11KV Switchgear. 9.2 ̀ General arrangement of 7 - panel 11KV switchboard including its foundation details. 9.3 Schematic drawings of control, metering & protection circuits in respect of 11KV

incoming VCB, 11KV outgoing VCB including station transformer VCB & 11KV capacitor VCB along with detailed write-up.

9.4 Drawing showing height of 11KV bus bars & arrangements of bus bars. 9.5 Vacuum interrupter drawing. 9.6 Name plate drawing.

Four copies of the descriptive literature in respect of 11KV switchgear, relays

KWH meters, voltmeters, ammeters and selector switches etc, proposed to be used shall also be supplied.

The successful bidder shall submit the above drawings in quadruplicate on A - 3

size paper to the CGM/MM, DHBVN, Hisar for approval. The purchaser shall communicate his comments / approval on / to the drawing to the successful bidder within a period of four weeks. The supplier shall, if necessary, modify the drawings and resubmit four copies of the modified drawings for the purchaser’s approval within two weeks from the date of receipt of purchaser’s comments. The modified drawings will be approved within 15 days of their receipt. After receipt of approved drawings, a set of reproducible of approved drawings & five sets of all the approved drawings & operating manuals containing, erection, operation & maintenance instructions per 11 KV switchboard shall be supplied to CGM / MM, DHBVN, Hisar for use by various agencies of the purchaser. However, one set of drawing and operating manual will be dispatched along with each 11 KV switchboard. The 11 KV switchgear will not be fabricated without getting the drawing approved from the purchaser. 10. SPECIAL TOOLS:

The bidder shall separately quote for a set of special tools, if so required, for

erection and maintenance of the switchgear panels.

11. DEVIATION FROM SPECIFICATION:

Should the tender wish to deviate from the provisions of the specifications, either on account of manufacturing practice or any other reasons, he shall draw attention to the proposed point of deviation in the tender and submit such full information, drawing and specification so that merits of his proposal may be fully understood. The specification shall be held binding unless the deviations have been fully accepted as requested.

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12. TRAINING FACILITIES:

The successful tenderer(s) may be called to arrange for training of Nigam’s Engineer/Technician’s at their works so as to make them familiar with the manufacture and assembly process of the equipment, covered in the specification. Two to three engineers/Technicians may be sent for a period of 2 weeks and full training facilities shall be made available to them.

13. GUARANTEED AND OTHER TECHNICAL PARTICULARS:

These particulars shall be furnished strictly as per Annexure ‘A’ in duplicate. Any

deviation from this specification shall clearly be brought out separately.

14. PLACE OF MANUFACTURE: The bidder shall state the place of manufacture, testing and name of the

manufacturer of the various items, included in his tender.

15. STANDARD MARK (S) OFRELAYS/OTHER FITMENTS:

The make(s) of relays / other fitments may be restricted to, as depicted in Annexure ‘C’.

16. INSPECTION:

Inspection of material and supervision of tests, in accordance with the relevant

ISS (as mentioned in clause 2 above), approved drawings and schedules shall be carried out by the purchaser or his duly authorized representative. The material shall be inspected and tested, before dispatch, by authorized representative of the Nigam. The manufacture shall provide to the inspecting officer all reasonable facilities, without charge, to satisfy him that the material is being furnished in accordance with the specifications.

The purchaser or his authorized representative shall have access, at all

reasonable time, to the manufacture’s works to inspect and witness the tests of the equipment manufactured.

The purchaser has the right to have the tests carried out, at cost of supplier, by

an independent Govt. Agency wherever there is a dispute regarding the quality of material supplied.

17. PACKING AND TRANSPORT:

The supplier shall be responsible for suitable packing of all the material and marking on the consignment so as to avoid any damage during the transport and storage and to ensure correct dispatch to the destination. 18. VACUUM BOTTLES:

The vacuum bottles should be capable of withstanding minimum 100 full short

circuit operations as per test duty 1 to 5 of IEC-56. The vacuum bottles, capable of withstanding less than 100 full short circuit faults, would not be considered and therefore should not be offered.

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A manufacture’s type test reports / literature for vacuum bottles, may, therefore be supplied along with tender in duplicate.

19. OPERATING MECHANISM:

As clearance between contacts, when VCB is in off condition, is very small, so it

is essential that operating mechanism is such that all the three poles open & close simultaneously.

20. INTERLOCKING:

Efficient mechanical interlocking shall be provided to meet the following conditions.

20.1 It should be possible to lower / withdraw the breaker only after the circuit breaker has

been opened. 20.2 It should be possible to raise or lower the circuit breaker when it is in the fully home

position as well as it is in the isolated position. 20.3 It should not be possible to remove the circuit breaker until the moveable plug unit

having secondary connections has been with drawn. 20.4 It should not be possible to replace, in position, moveable plug unit & unless the

breaker has been racked in. 20.5 Provision of shutters or lock off doors with locks shall be made to prevent access to

the bus bar chamber and receptacles when the circuit breaker is withdrawn. 20.6 Provision should be made for locking the circuit breaker closing mechanism in the

open position & locks provided.

21. MARKING:

The switchgear panels shall have nameplate carrying the following data indelibly marked:-

21.1 Name of the manufacture or a mark by which he may be readily identified. 21.2 Serial number or type designation making it possible to get all relevant information

from the manufacturer and year of manufacture. 21.3 Rated voltage. 21.4 Rated normal Current. 21.5 Rated frequency. 21.6 Rupturing capacity. 21.7 Breaking capacity 21.8 Making capacity. 21.9 Operating D.C. Voltage. 21.10 P.O. No. & Date.

GM/P&D CGM/P&D CGM/MM CGM/Commercial

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GUARANTEED AND OTHER TECHNICAL PARTICLATS FOR 11KV SWITCHGEAR PANELS

A. CIRCUIT BREAKERS: 1. Maker’s name and country of manufacture. 2. Type 3. Nominal system voltage 4. Highest system voltage 5. Frequency 6. Nominal current rating

6.1 At Ref. Ambient temp. as per relevant standard 6.2 At site conditions

7. Symmetrical breaking capacity (KA and MVA) 8. Asymmetrical breaking capacity (KA)

8.1 Symmetrical breaking current 8.2 Short time current rating for 1 sec.

9. Making capacity (peak KA) 10 1.2/50 microsecond impulse wave withstand test voltage 11 One minute power frequency withstand test voltage 12 No. of poles 13 No. of breaks per pole 14 Length of breaks per phase 15 Opening time (ms) 16 Making time (ms) 17 Arc duration (ms) 18 Type and material of main contacts 19 Material and thickness of plating of contacts 20 Type of arcing contacts and /or arc control device 21 Whether the circuit breaker is trip free 22 Whether lock out mechanism for preventing closing provided 23 Closing coil voltage and power required to close the breaker 24 Minimum clearance in vacuum

24.1 Between phases 24.2 Between live parts & earth

25 Minimum clearance in Air 25.1 Between phases 25.2 Between live parts & earth

26 Short Circuit Type Tests: Certificate or report No. (Attach photocopy) 27 Normal/operating voltage of closing mechanism 28 Total weight of complete breaker ( Kg.) 29 Dimensions and mounting details 30 Standard to which conforms 31 Detail of reference drawing attached. B. INSTRUMENT TRANSFORMERS (CURRENT TRANSFORMERS)

1. Rated primary current 2. Rated secondary current 3. Rated transformation ratio 4. V.A burden at rated current and accuracy. 5. Class of accuracy 6. Rated over current factor with time in seconds 7. Type of CTs ( whether wound or bar type) 8. Standard to which conform

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9. One minute power frequency withstand test voltage 10. 1.2/50 micro second impulse withstand voltage 11. Make of CT’s C RELAYS 1. Type and make 2. Time setting range 3. Other details like No. of auxiliary contacts 4. Standard to which conform 5. No. & Auxiliary contacts

D BUS BAR 1. Material 2. Normal current rating in amp. 3. Normal area (mm2 ) 4. Shape 5. Type of Insulation E. VOLTAGE TRANSFORMER 1. Rated primary voltage 2. Rated secondary voltage 3. Rated burden 4. Class of accuracy 5. Rated voltage factor & time 6. One minute power frequency withstand test voltage 7. 1.2/50 micro –sec. impulse withstand voltage 8. Make of PT’s

F PARTICULARS OF INSTRUMENTS & METERS: 1. Type of equipment(whether flush mounted or projected type) 2. Guaranteed % errors at different loads 3. Make & size of Ammeters, Voltmeters, KWH & Power Factor Meters

G PARTICULARS OF VACUUM BOTTLES: 1. Name of manufacture 2. Whether imported or indigenous 3. Manufacturer’s type, normal amps and rupturing capacity for vacuum bottles used for

Incoming panel 4. ---------------------do---------------------- for outgoing panels 5. ---------------------do---------------------- for capacitor control panel 6. Degree of vacuum inside the vacuum interrupters 7. Short time rating of vacuum bottles 8. Number of full short circuit operations as per test duly 1to 5 of IEC-56, which the vacuum

bottles offered can safely withstand 9. Whether the vacuum bottles used on incoming and outgoing panels are same or different. 10. Whether the operating mechanism is imported or indigenous.

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Annexure-B SCHEDULE OF REQUITEMENT

7 panel, 11KV switchboards with each switchboard comprising of the following as

per Nigam’s specification No.____________.

1. 1 No. Incoming panel equipment as below: -

a. 1 No. Triple Pole, 350 MVA, 11KV 800 Amps circuit breaker fitted with arc control device, interlocks, auxiliary switches, isolating contacts, emergency hand trip device, mechanical ‘ON’ and ‘OFF’ indicator & motor operated spring charging mechanism.

b. One set of 3 phase 800 amps bus bars. c. One set of isolating plug and sockets. d. One set of single –phase cluster type isolating contacts. e. 1 No. Trifurcating main cable boxes located at the rear of the unit for reception of 3-

core XLPE cables of up to 630-mm2 size and complete with wiping glands and clamps.

2. A set of 3 core CT’s with ratio 400/200/5-5-5A :- a. One core for REF protection having minimum knee point voltage of 90 X RCT on 400

Amps taps. It shall conform to accuracy class PS of ISS: 2705 (part-IV) and shall have magnetizing current as low as possible but in no case exceeding the value corresponding to class 5P of ISS: 2705 (part IV).

b. Second core for over current and earth fault protection with 15VA as out put burden-having accuracy of 5P10.

c. Third core for metering with 15VA burden output and the class of accuracy as 0.5. 3. 1 No. 3 phase star/star connected bus bar type resin cast draw out voltage transformer of

ratio (11000/√3)/(110/√3) volts and 100 VA output per phase with class 1.0 accuracy as per IS: 3516 (part-II)-1965 complete in all respect with HT and LT fuses, isolating plugs and sockets for HT& LT copper connectors, current limiting resistances and first filling with insulating oil.

a. 1 No. 230 V.A.C. panel space heater. b. 2 set of vermin and dust proof fitments. c. 1 earthing set for earthing the breakers individually.

4. 1 instrument panel mounted on top and equipped as below:-

a. 1 No. suitably sealed C.T’s operated static ammeter of 5 Amps. with digital display b. 1 No. 3 way ON/OFF ammeter selector switch. c. 1 No. 0 to 15 KV static voltmeter with digital display. d. 1No. 3 way ON/Off voltmeter selector switch e. 1 No. Static power factor meter for reading both the leading and lagging PF. f. 1 No. 3 elements electronic KWH meter suitable for 3 phase 4 wire unbalanced load

conditions with accuracy class 0.5 (as per DHBVN specification) and with RS 485 port with MODBUS protocol for Data Logging/ Data-down-loading facility.

5. One set of triple pole combined over current and earth fault IDMTL relay with two outer

elements for over current protection with setting of 50-200% of 5 Amps and central element for E/F protection with setting range of 20-80% of 5 Amps mounted in horizontal draw-out type flush pattern case.

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One set of high set instantaneous elements, consisting of two elements for over current, having setting range of 500 - 2000% of 5A and one no. earth fault high set instantaneous element, having setting range of 200 -800% of 5A and adjustable in suitable steps having low transient over reach with a high pickup / drop out ratio. The high set instantaneous element shall be so wired so as to take this element (instantaneous) out of circuit, if so desired by the Nigam, at any time during the operation of equipment.

6. One No. single pole restricted E/F relay with setting of 10-40% of 5 Amps and complete

with a tuned 50c/s circuit and stabilizing resistance mounted in draw-out type flush pattern case with a provision of inter-tripping the circuit breaker.

7. 4 No. 230 volt A.C. indicating lamps with fittings to indicate breaker open, breaker closed

auto trip and spring charged.

a. 1 indicating lamp with fitting and push button switch to indicate trip healthy. Trip circuit supervision scheme and D.C. fail scheme as per foregoing specification.

b. 1 No Breaker control switch.

c. 1set of alarm equipment wired so as to be common to the complete board and

comprising of alarm initiating auxiliary relay, alarm bell, indicating lamp and push button for alarm cancellation and lamp resetting.

d. 1No. Test terminal block for testing of instrument and relay.

8. 4-Outgoing Feeder Panels each Comprising.

8.1 1No. Triple pole 400 amps 350 MVA 11KV circuit breaker fitted with arc control

devices, interlock arrangement, auxiliary switches, isolating contacts, alarm Contacts, emergency hand trip device, mechanism ON&OFF indicators and spring charged closing mechanism operating at 240 V AC motors.

8.2 1set of 3 phase 800 amps bus bars. 8.3 1set of Isolating plugs and sockets. 8.4 1No. Trifurcating main cable box for reception of 11KV, 3-core, XLPE cable of

300mm2 and complete with wrapping glands and clamps. 8.5 3No. Double core CT’s with ratio 300/150/5-5A having one core for metering with

15 VA Burden and Class of Accuracy as 0.5 and the other core with 15VA as burden and Class of Accuracy as 5P 10 for O/C and E/F protection.

8.6 1No. 230V.A.C. panel space heater. 8.7 1 set of vermin and dust proof fitments. 8.8 1intrument panel mounted on top and equipped as below:-

8.8.1 1No. suitably sealed CT operated Static Ammeter of 5 Amps, with digital display 8.8.2 1No. 3-way on/off ammeter selector/switch.

8.8.3 1No. 3 element electronic KWH meter suitable for 3 phase, 4wire unbalanced load and flush mounted with Accuracy class 0.5 (as per DHBVN specification) and with 485 with MODBUS protocol for Data-logging/Data-down-loading facility.

8.8.4 P.T. leads should come direct from 11KV P.T. Secondary to avoid any tempering in between. 1set of triple pole combined O/C and E/F IDMTL relay with two outer elements for O/C protection having setting of 50-200% of 5 Amps and central elements for E/F protection with setting range of 20-80% of 5 Amps mounted in draw-out type flush pattern case. A set of triple pole combined over current & earth fault instantaneous high set relays with two elements for over current protection having a setting range of 500% to 2000% of 5 Amps and the central element for earth fault protection having a setting range of 200%-800% of 5

18

Amps. The relay shall have low transient over reach with a high pick up/drop off ratio. Relay will be connected in series with the triple pole combined over current and earth fault relay referred to above and shall be so wired as to take this element (instantaneous) out if so desired by the purchaser at any time during operation of equipments.

8.9 3 Nos. 230 Volts AC indicating lamps with fittings to indicate Breaker Open, Breaker CLOSED and AUTO TRIP.

8.10 1 Nos. 230 Volts DC indicating lamp with fittings and push button switch to indicate TRIP CIRCUIT HEALTHY.

8.10.01 1 No. Breaker Control switch. 8.10.02 1 No. Test Terminal Block for testing instruments & relays. 8.10.03 1 No. 3 - way ON/OFF Ammeter selector switch.

9. 1-No. Station Transformer Feeder Panel:-

9.1 Similar to item No. 8 but with the following C’Ts:- 3 Nos. having double core C’Ts of 60/30/5-5 A with one core having 15 VA output as burden and 5P10 accuracy for over current and earth fault protection and the other core for metering having 15VA as burden and class of accuracy as 0.5.

10. 1 No. 11KV Capacitor control panel:

10.01 1 No. Triple pole 400 Amps, 350 MVA, 11KV circuit breaker fitted with arc

control device, interlock arrangement, auxiliary switches, isolating contacts, alarm contacts, emergency hand trip device, mechanical ON & OFF indication and under voltage release.

10.02 1 set of 800 A bus bars. 10.03 1set of isolating plugs & sockets. 10.04 1 set of single-phase cluster type isolating contacts. 10.05 1 No. Trifurcating main cable box for reception of 3 core XLPE up to 185 mm2

size and complete with wiping glands and clamps. 10.06 3 Nos. CTs of ratio 200-100-50-/5A with 15 VA output burden of 5 P 10

accuracy for protection 1 No. 230 V AC Panel Space heaters. 10.07 1 set vermin and dust proof fitment. 10.08 1 Instrument panel mounted on top and equipped as below:- 10.08.01 1 No. suitably sealed CT operated static Ammeter of 5 Amp., with digital

display. 10.08.02 1 No. 3-way ON/OFF Ammeter selector switch. 10.08.03 3 Nos. 230 VAC indicating lamps with fitting to indicate breaker open, breaker

closed and auto trip. 10.08.04 1 No. 24 VDC indicating lamps with fitting to indicate trip healthy. 10.08.05 1 No. Breaker control Switch. 10.08.06 1 set of triple pole combined over current & earth fault IDMT relay with two

outer elements for O/C protection having setting of 50-200% of 5 AMPS, and central elements for earth fault protection with setting range of 20 to 80% of 5 amps mounted in drawn out type flush pattern case.

10.08.07 One Set of inverse time Neutral (Voltage) displacement relay suitable for 190 V AC operations for protection of the bank against unbalancing.

10.08.08 One set of over voltage relay with setting range 110% to 170% along with auxiliary transformers (for external mounting) having ratio 121/115 to 127 (in Steps of 1 Volt) to be used for compensating the error of over voltage relay.

10.08.09 One no. under Voltage Relay with setting range of 50% to 90%.

19

10.08.10 10 Minute adjustable timer to ensure that the capacitor bank is fully discharged once it has been switched off before it can be switched ON again.

10.08.11 The capacitor controlling breaker should be suitable to meet all conditions required for capacitor operation and should be suitable for controlling capacitive current up to 400 Amps at 11 KV which is equivalent to 7.5 MVAR approx 110V supply shall be available from existing (11000/√3) (110/√3) Volts PT’s.

Standard make (S) of Relays/Fitments

1 Relays ALSTOM/EASUN

REYROLLE/ABB/SIEMENS Or other equivalent reputed make with IS mark

2 Breaker Control Switch Kaycee/Alstom/Recom or other equivalent reputed make with IS mark

3 Ammeter/Voltmeter/Selector/Switch Kaycee/Recom or other equivalent reputed make with IS mark.

4 Static Ammeter/Voltmeter/Static Power Factor Meter with Digital Display

AE/IMP/MECO Or other equivalent reputed with IS mark

5 Electronic type KILOWATT Hour Meter with RS Port for Data Logging /Data Down Loading Facility

SECURE/L&T ABB Or other equivalent reputed make with IS mark

6 PUSH BUTTONS ALSTOM/KAYCEE/VAISHNO Or other equivalent reputed make with IS mark

7 Indicating lamps with lenses ALSTOM/KAYCEE/VAISHNO Or other equivalent reputed make with IS mark

8 Cable termination kits DENSON/M-SEAL Or other equivalent reputed make with IS mark

9 Cable glands DENSON/M-SEAL /COME Or other equivalent reputed make with IS mark

10 Panel Wiring ECKO/PHOENIX Or other equivalent reputed make with IS mark

11 Hooter/Buzzer/Bell ANCHOR/KAYCEE Or other equivalent reputed make with IS mark

12 CTs /PTs VISHAL/CONCORD/ZENITH/SARAF/GYROOr other equivalent reputed make with IS mark


Specification No. CSC- 44 /DH/UH/P&D/2009-2010


FOR

11 kV XLPE POWER CABLES OF VARIOUS SIZES 50, 99, 150, 185 & 300 mm2

(CROSS LINKED POLYTHELENE DRY/ GAS

CURED)

Month Issue:


Page 1 of 18

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TECHNICAL SPECIFICATION FOR 11 kV XLPE POWER CABLE (CROSS

LINKED POLYTHELENE DRY / GAS CURED)

1. SCOPE:

This Section of the Specification covers design, manufacturing, testing,

packing, supply & delivery FOR destination of 11 kV XLPE Dry / gas

cured insulated power cable of size 50, 99, 150, 185 & 300 mm2 for

effectively earthed specification system.

2. STANDARDS:

Unless otherwise specified, the cable shall conform in all

respect to IS: 7098 (Part-II)-1985, IS:8130-1984 and IEC-502

standards with latest amendment thereof.

3. CLIMATIC CONDITIONS:

The climatic conditions under which are cables shall operate

satisfactorily are as follows

1. Max. ambient air temperature 600C

2. Min. ambient air temperature (-)50C

3. Average Daily max. ambient temperature 400C

4. Max. yearly weighed average ambient

temperature

320C

5. Max. altitude above mean sea level (Meters) 1000

6. Minimum Relative Humidity (%age) 26

7. Max. Relative Humidity (%age) 95

8. Avg. No. of Rainy days/year 120

9. Avg. annual rainfall 900 mm

10. Maximum wind pressure 195 Kg./m Sq.

Note: Moderately hot & humid tropical climate conductive to rust & fungus

growth. The climatic conditions are also prone to wide variations in

ambient conditions. Smoke is also present in the atmosphere Heavy

lightning also occurs during June to October.

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4. PRINCIPAL PARAMETERS:

4.1. 11 kV (E) Grade XLPE, 3-Core, power cable shall be of high

conductivity, stranded compacted, H.D. aluminum circular shaped

conductor with XLPE (cross linked Poly Ethylene) Dry/ Gas cured

insulation provided with shielding of extruded semi-conducting

materials over conductor and XLPE insulation. Each insulated core shall

have copper tape screen, laid together and provided with common

covering of PVC Inner Sheath (Extruded). Overall galvanized steel strip

arm our and PVC outer sheath shall be provided. The specification

for manufacture of cable shall be conforming to IS: 7098 (Part-II) 1985

(latest edition) for 11KV (E), 3-phase, 50 Hz. Earthed systems.

4.2. Outer sheath shall be designed to afford high degree of

mechanical protection and shall also be heat, oil, chemical and weather

resistant, Common acid, alkalis and sealing solution shall not have

adverse effect on material of PVC sheath.

4.3. Cable shall be suitable for laying in covered trenches and / or buried

under-ground in outdoor.

4.4. Cable Parameters :

(i) Voltage grade (Uo / U) kV : 6.35 / 11

(ii) Cores (Nos) : 3

(iii) Nominal system voltage kV : 11

(iv) Highest system voltage kV : 12

(v) System frequency Hz : 50

(vi) Variation in frequency % : � 3

(vii) (b) Maximum allowable 900C :

temp. under short circuit

condition

(viii) 1.2/50 microsecond lightning impulse

wave withstand voltage value. : 75KVp

(ix) 5 Min. Power frequency

withstand voltage kV rms : 17

(x) System earthling : Effectively earthed.

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5. ENERAL TECHNICAL REQUIREMENTS:

5.1. Conductor:

The cable conductor shall be made from high conductivity stranded High

Density aluminum to form compacted circular shaped conductor having

resistance within limits specified in IS: 8130/1984 and any latest

amendment to it.

5.2. Conductor shield:

The conductor having semi-conducing screen shall ensure perfectly

smooth profile & avoid concentration of stress. The conductor screen

shall be extruded in the same operation as the insulation. The semi-

conducting polymer shall be cross linked.

5.3. Insulation:

The XLPE insulation shall be suitable for 11 kV system voltage and

should be manufactured with Dry /Gas curing process. The bidder

shall submit the description of dry /gas curing process, with the

clear inclusion of equipments / parameters involved. The

manufacturing process shall ensure that the insulation shall be free of

voids. The insulation shall withstand mechanical and thermal stress

under steady state and transient operating conditions. The

extrusion method should give very smooth interface between semi-

conducting screen and insulation. The insulation of the cable shall be

of high standard quality generally conforming to IS: 7098 (Part – II) –

1985 and any latest amendment to it.

5.4. Insulation shield:

Non-metallic semi-conducting shield shall be provided over the insulation

to confine electrical field to the insulation. The insulation shield

shall be extruded in the same operation as the conductor shield and

the insulation by suitable extrusion process. The XLPE insulation

shield shall be of tended type. Copper metallic overlapped tape shield

shall be provided.

5.5. Filler and Inner-Sheath:

The sheath shall be suitable to withstand the site conditions and the

desired temperature. It shall be of adequate thickness, consistent quality

and free from all defects. The PVC sheath shall be extruded. The

material of fillers and inner-sheath shall be compatible with the

temperature ratings of the cable and shall have no deterious effect on

any other component of the cable. Central PVC filler shall also, be

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provided with other peripheral PVC fillers to have proper circular

section.

5.6. Armour:

Armoring of galvanized steel strip shall be provided. The dimensions

of steel strips shall be as per latest edition of IS: 3975 – 1979.

5.7. Outer-Sheath:

Extruded type ST-2 PVC outer-sheath, conforming to IS: 5831- (1984)

(latest edition) over armoring with suitable additives (to prevent attack

by rodents & termites), shall be provided.

5.8. Construction:

5.8.1. The cable shall have suitable PVC fillers laid up with insulation cores to

have subsequently circular cross-section before the inner sheath is

applied. The fillers shall be suitable for operating temperature of

the cable.

5.8.2. All materials used in manufacturing of cable shall be new, unused

and of finest quality. All materials should comply with the requirements

/ tests as per applicable IS / IEC specification, Indian Electricity Rules

and any other statutory provision of rules & regulations.

5.8.3. The PVC material used in the manufacture of cable shall be of reputed

manufacturer. No recycled material PVC is permitted. The purchaser reserves

the right to ask for documentary evidence of the purchase of var ious

mater ia ls , ( to be used for the manufacture of cable) as a part

of quality control. Quality Assurance plan shall be submitted.

5.9. Current Rating:

The indicative value of continuous current carrying capacity at Maximum

conductor temperature of 90 0C (for design purpose by field ) of the

various sizes of the cables is given below:

Continuous Current Carrying

Capacity in Amp

(For 11 kV cable)

Sr.

No.

Size of 3 Core

Cable

(Sq.mm) IN Ground In air

1 50 130 140

2 95 185 200

3 150 235 265

4 185 270 310

5 300 340 396

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The bidder needs to confirm the guaranteed corresponding figures.

5.9.1. Short circuit ratings of various sizes of 3 core cable calculated for

duration of one second at maximum temperature of 2500 C, are given

below:

Sr.

No.

Size of 3 Core Cable

(Sq.mm)

Conductor short circuit rating in kA

(rms) (For 11 kV cable)

1 50 4.70

2 95 8.93

3 150 14.1

4 185 17.4

5 300 28.2

The bidder needs to confirm the guaranteed corresponding figures.

5.9.2. The current rating shall be based on maximum conductor

temperature of 90 0 C with ambient site condition as specified herein.

Continuous rated current of cable supplied shall be clearly specified at

ambient temp. of 20,30, 40, 50 & 60 0C.

5.9.3. Operation :

5.9.4. Cable shall be suitable for operation under frequency variation of ±3%

and voltage variation of +10% to -15% and combined frequency -

voltage variation of 10% (absolute sum).

5.9.5. Cable shall be suitable for laying in duct or buried underground.

5.9.6. Cable shall have heat & moisture resistance properties. These shall be

of type & design with proven record on distribution network service.

5.9.7. Length :

The cable shall be supplied in standard drum length of 300 mtrs. ±

5% tolerance for all the sizes of cable except for 3 C x 300 mm2 size

cable. The drum length for 3C x 300 mm2 cable shall be 200 mtrs. ±5%.

Over all tolerance in total quantity of ordered cables shall be ± 2%.

5.9.8. Identification Mark :

(i) The cable drum shall be printed with information as per cl. 21;2 of IS

and ISI Certification mark. Bidder shall submit xerox copy of valid ISI

Licenses with technical bid.

(ii) For identification of cores, coloured strip of Red, Yellow and Blue

colours shall be used for identification of phases. Following details

of identification shall be embossed at intervals of length of one meter

of cable outer sheath.

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(iii) (a) Name of manufacturer (b) year of manufacture (c) voltage grade

(d) Name of purchaser “DHBVN ”(e) ISI certification mark.

6. TESTS:

6.1. (A) Type Tests:

All the cable sizes i.e. items offered should have been fully

type tested as per the relevant standards at any Govt.

recognized Laboratory. The bidder shall furnish three sets of

type test reports along with the offer. These type tests must

have been conducted within last five years prior to date of Bid

opening. For any change between design/type of already type

tested and the design / type offered against this specification,

the purchaser reserves the right to demand repetiton of type

tests without any extra cost.

The purchaser also reserves the right to have tests carried out at

his own cost from an independent agency, whenever there is a

dispute regarding the quality of supply.

(B) Type tests certificates for following type tests shall be furnished

invariably with the offer:

(a) Tests on conductor : (i) Tensile test (ii) Wrapping test (iii) Resistance test

(b) Tests for armouring strips / wires. :

(c) Tests for thickness of insulation and sheath. : (d) Physical tests for insulation. :

(i) Tensile strength and elongation at break.

(ii) Ageing in air oven

(iii) Hot set

(iv) Shrinkage test

(v) Water absorption

(e) Physical tests on outer seath :

(i) Tensile strength and elongation at break.

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(ii) Ageing in air oven

(iii) Shrinkage test

(iv) Hot deformation

(v) Bleeding and blooming test

(f) Partial discharge test

(g) Bending test

(h) Dielectric power factor test

i) as a function of voltage

ii) as a function of temperature

(i) Insulation resistance test (volume resistivity)

(j) Heating cycle test

(k) Impulse withstand test

(l) High voltage test

(m) Flammability test

6.2. Acceptance Test:

6.2.1. The selection of sample pieces for acceptance test shall be from

10% drums of each lot offered for inspection or part thereof. The

minimum shall be one drum.

6.2.2. The following acceptance tests shall be carried as per IS: 7098

(Part-II) – 1985 out on the selected samples.

(a) Annealing test (for copper) (b) Tensile test (for aluminum) (c) Wrapping test (for aluminum) (d) Conductor resistance test. (e) Test for thickness of insulation and sheath (f) Hot set test for insulation (g) Tensile strength and elongation at break test for insulation and

sheath. (h) Partial discharge test (for screened cables only)

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(i) High voltage test for 4 hours (as per cl. No. 19.7.1) (j) Insulation resistance (volume resistivity) test.

6.2.3. All the acceptance tests shall be carried out by the firm, in the presence of

purchaser’s representative at their works. The firm shall give atleast 15

days’ advance notice to the purchaser to enable him to depute the

engineer for witnessing the tests. The test certificates for acceptance

tests witnessed by inspecting officer/ engineer shall be submitted for

approval before dispatch of material.

6.2.4. Tests:

6.2.4.1.1. The Inspector may inspect the following routine test for at the

time of inspection .

(a) Conductor resistance test (b) Partial discharge test (c) High-voltage test for 5 minutes [as per Clause 19.7.2 of IS:

7098 (Part-II) – 1985].

7. INSPECTION:

7.1.1. The inspection may be carried out by the purchaser at any stage of

manufacture. The successful bidder shall grant free access to the

purchaser’s representative at reasonable time, when the work is in

progress. Inspection and acceptance, of any cables under this

specification by the purchaser, shall not relieve the supplier of his

obligation of supplying cable in accordance with the specification

and shall not prevent subsequent rejection, if the cables are found

defective.

7.1.2. The supplier shall keep the purchaser informed in advance about the

programme of manufacturing of cables so that arrangement can be

made for inspection.

7.1.3. The purchaser reserves the right to insist for witnessing the

acceptance / routing tests of the bought out items.

7.1.4. The manufacturer shall be responsible to pay penalty of Rs 20,000/-

for each occasion at which the fake inspection call has been made or

the material is rejected during testing/inspection by the authorized

agency/representative of the Nigam. This penalty would be in addition

to the expenses incurred by the Nigam in deputing the Inspecting

Officer, carrying out such inspection.

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7.1.5. At least 5% of total numbers of drums subject to minimum of 2 in each

lot put up for inspection shall be selected at random to ascertain the

length/workmanship of cable by the following method:

At the work of the manufacture, the cable shall be transferred from

one drum to another for checking any manufacturing defects in the

cable drum selected for conducting acceptance tests, at the same time

measuring its length with the help of pulley & cyclometer

graduated in presence of inspector. The difference in the measured

length thus obtained from the declared length by the supplier in the

packing list shall be applied to all the drums if the cable is found short

during checking the sample lot (s).

7.1.6. The supplier shall present the latest Calibration Certificate(s) of testing

instruments/equipments to be used for the testing of the material

covered in the Purchase Order to the authorized inspecting officer

/inspecting agency of the purchaser. The testing instruments / meters

/apparatus etc. should be got calibrated by the supplier from time to time

from an independent testing laboratory / house having valid

accreditation from National Accreditation Board for testing and

calibrating laboratories for the testing equipment or from original

manufacturers having trace ability to NABL /NPL. The calibration

certificate(s) should not in any case be older than one year at the time

of presenting the same to the inspecting officer / inspecting agency of

the purchaser. The testing instruments / equipment should be duly

sealed by the Calibrating Agency and mention thereof shallbe indicated in

the calibration certificate(s).

8. DOCUMENTATION:

The bidder shall furnish following documents along with his offer.

8.1.1. Sectional view, showing the General constructional feature with

conductor / conductor screen / insulation / armoring / inner and outer

sheath etc.

8.1.2. Drawing of cable drums with details of material dimension and paint etc.

8.1.3. All the required type test reports for offered items tested at any

Government recognized Laboratory as stated under Clause No. 6.1

(B).

8.1.4. Literature, pamphlets for the supplied items.

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9. PACKING AND FORWARDING:

9.1.1. The cable shall be wound on wooden drums as per IS: 10418 – 1972

and packed in drums suitable for vertical / horizontal transport, as

the case may be and shall be suitable to withstand rough

handling during transport and outer storage. The outer surface of the

drum shall be painted with white aluminum pint. Similarly, the inside

surface of drum shall have the protective layer of varnish / paint .

9.1.2. The wooden drums shall be reinforced with steel bends and strips for

better protection.

9.1.3. The ends of the cable shall be sealed by means of non-

hygroscopic sealing material.

9.1.4. The following information be stenciled on the drum with either water

proof ink or oil paint:

i. Reference of IS / IEC standard.

ii. Manufacturer’s name or trademark.

iii. Type of cable and voltage grade.

iv. No. of cores.

v. Nominal cross-sectional area of conductor. vi. Cable code.

vii. Length of cable on the drum

viii. No. of lengths on the drum (if more than one)

ix. Direction of rotation of drum (by means of an arrow)

x. Position of outer end of cable

xi. Gross weight

xii. Year of manufacture

xiii Reference of Tender No. / P.O. No. date

xiv Property of __________.

xv. Name of consignee and the destination.

The drum may also be marked with ISI Certification Mark.

9.1.5. The firm shall be responsible for any damage to the cables during

transit due to improper and inadequate packing. Wherever

necessary, proper arrangement for lifting, such as lifting hooks, shall

be provided. Any cable found short inside the packing cases shall be

supplied by the supplier, without any extra cost.

9.1.6. Each consignment shall be accompanied by a detailed packing list,

containing the following information:

(a) Name of consignee

(b) Details of consignment

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(c) Destination

(d) Total weight of consignment

(e) Handling and unpacking instruction

(f) Bill of materials, indicating contents of each package.

10. TECHNICAL AND GUARANTEED PARTICULARS:

The bidder shall furnish all Guaranteed Technical Particulars, as called

for, in Appendix - I of this Specification. Particulars, which are subject

to guarantee, shall be clearly identified. Offer not containing these

information will not be considered for acceptance.


The material offered/received after the inspection by the authorized

inspecting officer may again be subjected to test for any parameter from

any testing house/in-house technique of the Nigam & the results if found

deviating un-acceptable or not complying to approved GTPs, the bidder

shall arrange to supply the replacement within thirty (30) days of such

detection at his cost including to & fro transportation. In addition , penalty

@10% of cost of the inspected lot of material shall be imposed.

12. Warranty Period:-

The supplier shall be responsible to replace, free of cost, with no

transportation or insurance cost to the purchaser, up to destination, the

whole or any part to the material which in normal and proper use proves

the defective in quality or workmanship, subject to the condition that the

defect is noticed within 18 months from the date of receipt of material in

stores or 12 months from the date of commissioning whichever period

may expire earlier. The consignee or nay other officer of Nigam actually

using the material will give prompt notice of each such defect to the

supplier. The replacement shall be effected by the supplier within a

reasonable time, but not, in any case, exceeding 45 days/ The supplier

shall, also, arrange to remove the defective within a reasonable period,

but not exceeding 45 days from the date of issue of notice in respect

thereof, failing which, the purchaser reserve the right to dispose of

defective material in any manner considered fit by him (purchaser), at the

sole risk and cost of the supplier. Any sale proceeds of the defective

material after meeting the expenses incurred on its custody, disposal

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handling etc., shall however be credited to the supplier’s account and set

off against any outstanding dues of the purchaser against the supplier.

The warranty for 12/18 months shall be one time.

The specification no. CSC-XIV/ DH/UH/P&D/2009-2010 be hereby

considered withdrawn.

Director/Technical-I,

UHBNV, Panchkula

Director/Project,

DHBVN, Hisar

CGM/PD&C,

UHBVN, Panchkula

CGM/P&D,

DHBVN, Hisar.

FA & CAO/MM,

UHBNV, Panchkula

FA & CAO/MM,

DHBVN, Hisar

GM/P&D,

UHBNV, Panchkula

GM/P&D,

DHBVN, Hisar

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APPENDIX – I

SCHEDULE OF GUARANTEED TECHNICAL PARTICULARS FOR

11KV XLPE POWER CABLE

(To be filled in and signed by the Tenderer)

1.00.0 GENERAL:

1.01.0

Name of Manufacturer

:

1.02.0

Place of Manufacturing

:

1.03.0

Applicable standard IS/IEC

:

1.04.0

Design ambient temperature 0C

:

1.05.0 Cable size(s) of cable offered

mm2

:

Note: (Fill – up separate column for the following particulars for each type

& size of cable)

2.00.0 CABLES:

2.01.0

Voltage grade (Uo / U)

:

2.02.0 Whether suitable for neutral : earthed / unearthed System

2.03.0 Permissible voltage & frequency : a) Voltage variation for satisfactory operation b) Frequency

c) Overall 2.04.0 Nos. of cores & size :

2.05.0 Continuous current carrying : capacity

2.05.1 For standard condition as per IS

1) In air (Amp.) :

2) In ground ( “ ) :

3) In duct ( “ ) :

4) In trench ( “ ) :

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2.05.2 For site condition :

1) In air (Amp.) :

2) In ground ( “ ) :

3) In duct ( “ ) :

4) In trench ( “ ) :

3.00.0 CONDUCTOR:

3.01.0 Material & its applicable IS. :

3.02.0 Shape of conductor : 3.03.0 Nominal cross section area (mm2) :

3.04.0 Number of wires per core : 3.05.0 Nominal area of each wire used in each core of the

conductor as a)Diameter mm

b) Cross section mm2:

4.00.0 CONDUCTOR SCREENING:

4.01.0

Type

:

4.02.0

Material & its applicable IS.

:

4.03.0

Max. working temp 0C

:

4.04.0

Nominal thickness (mm)

:

5.00.0 INSULATION:

5.01.0 Material & its applicable IS : 5.02.0 Thickness of insulation (mm)

a) Between cores :

b) Between cores & inner sheath :

5.03.0 Tolerance in thickness (percent) : of insulation

5.04.0 Diameter of core over insulation :

(mm)

5.05.0 Specific resistance of insulation at :

ninety (90) degree Centigrade

(Ohm-Cm)

6.00.0 INSULATION SCREENING:

6.01.0 Material & its applicable IS. :

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6.02.0 Thickness (mm):

1) Semi-conducting part :

2) Metallic part (copper tape) :

6.03.0 Whether overlapping provided for :

copper tape

6.04.0 Current carrying capacity :

a) Continuous (Amps.) :

b) S.C. current duration of 3-Sec. :

(KA)

c) S.C. current duration / sec.(kA) :

6.05.0 Diameter of core over screening :

(mm)

6.06.0 Whether insulation screen is :

removable without the application of heat

7.00.0 FILLER:

7.01.0

Material & its applicable IS

:

7.02.0 Whether suitable for : Yes/ No

Operating temperature of Cable

7.03.0 No of fillers provided :

including central filler

8.00.0 INNER SHEATH:

8.01.0 Material & its applicable IS :

8.02.0 Extruded or wrapped : 8.03.0 Thickness (mm) :

8.04.0 Diameter of cable over inner- :

sheath (mm)

9.00.0 ARMOURING:

9.01.0 Material & its applicable IS :

9.02.0 Type of armouring :

9.04.0 Nos. of strips :

9.05.0 Diameter of cable over armouring :

9.06.0 Current carrying capacity of :

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armour

a) on continuous basis (Amp)

b) short circuit current duration of :

1 sec (KA)

10.00.0 OUTER SHEATH:

10.01.0

Material & its applicable IS.

:

10.02.0

Thickness of sheath

:

10.03.0

Tolerance on thickness of sheath

:

10.04.0

Over all diameter of cable (mm)

:

10.05.0

Scheme for identification

:

11.00.0 CABLE CONSTANT:

11.01.0 AC resistance per core at :

operating temp. (Ohm/KM)

11.02.0 DC resistance per core at 200C :

(Ohm/KM)

11.03.0 Reactance per core (Ohm/KM) :

11.04.0 Capacitance per core :

(Microfarad/ KM)

11.05.0 Insulation resistance at 270C :

(Ohm/ KM)

11.06.0 Loss tangent :

11.07.0 Dielectric constant :

11.08.0 Maxi. Cable charging current at :

normal rated voltage

(Amp/KM)

12.00.0 OTHER PARAMETERS:

12.01.0 Recommended minimum braiding :

radius (mm)

12.02.0 Safe pulling force :

12.03.0 Cable weight (Kg./KM) :

of 18

13.00.0 CABLE DRUM:

13.01.0 Net weight of cable (Kg.) :

13.02.0 Drum weight (Kg.)

:13.03.0 Shipping weight (Kg.) :

13.04.0 Whether ISI Mark shall be :

indicated on drum (Yes/No)

13.05.0 Length of cable per drum (Meter) :

14.00.0 Whether details shall be :

embossed as stated under Cl.

1.9.4 of Technical Specification

(Yes/No)

15.00.0 Whether type test reports :

submitted, as stated under Cl.

6.1 of Technical Specification

(Yes/ No)

16.00.0 Whether drawings submitted as :

specified under Cl. 8.1.1 & 8.1.2 of

Technical Specification. (Yes/ No)

17.00.0 Whether unpriced schedule of : .

offered items submitted with

Technical offer. (Yes/ No)

_______________ ________________________

SEAL OF FIRM SIGNATURE OF TENDERER


Specification No. CSC-XXXVI/DH/UH/P&D/2009-2010


OF

HEAT SHRINKABLE / PUSH ON TYPE

TERMINATIONS FOR 11 KV XLPE CABLES

Issue of the Month: Jan. 2010


Page 1 of 10

1. SCOPE :-

This specification covers the design, manufacture, assembly and testing of heat shrinkable/push on type terminations suitable for 11 KV 3-core XLPE insulated, screened, armoured, with aluminium conductor cables suitable for earthed system and confirming to IS:7098(Part-II)-1985 with latest amendment, if any.

2. STANDARD :-

The performance as well as type test requirements of all type of kits referred under scope shall conform to stipulations of IS : 13573/1992 or VDE-0278 with latest amendments, if any.

All the electrical & physical parameters of terminations should also

conform to the corresponding parameters of XLPE cables referred under ‘SCOPE’ of this specification, as per IS: 7098 (Part-II)-1985 (with latest amendments, if any) or equivalent international standards..

3. CLIMATIC CONDITIONS :-


2. Min. ambient air temperature C -5OC

3. Average Max. Daily ambient temperature 400C

4. Max. yearly weighed average ambient temperature

320C

5. Max. altitude above mean sea level (Meters) 1000





10. Maximum wind pressure 195 Kg./m Sq.

4. REQUIREMENT :-

The heat shrinkable/push on type terminations offered shall be of proven design and make, which have already been extensively used ;and fully type tested.

5. GENERAL REQUIREMENT :-

The purpose of this specification is to specify the performance requirements of termination kits for the use on 50 C/S 3 phase system with earthed neutral for working voltage of 11 KV. Earthing arrangement shall be as per relevant standard and details of earthing arrangement offered shall be submitted alongwith the tender.

Page 2 of 10

5.1 The material to be used should be inert and capable of resisting

degradation during the service of cable system. The kit shall be provided with protection against rodents and termite attack.

5.2 Heat Shrinkable Type (Terminations) : 5.2.1 The term heat shrinkable refers to extruded or moulded polymeric

materials which are cross-linked to develop elastic memory and supplied in expanded or otherwise deformed size/shape, subsequently heating in a non-constrained state to a temperature above the shrink temperature resulting in the material recovering or shrinking to its original shape.

5.2.2 Since the sealant or adhesives (to be used for environment sealing)

between the ;heat shrinkable materials and XLPE cables shall be exposed to high electrical stresses, they must be track resistant.

5.2.3 The heat shrinkable polymer materials being used for external

leakage insulation between the high voltage of conductors and grounds should be weather resistant.

5.2.4 All cuts/nicks inadvertently occurred to XLPE insulation must be

rendered discharge free by using suitable discharge suppression compound.

5.2.5 The heat shrinkable tubing may be either extruded or moulded

type. 5.2.6 Higher thickness of heat shrinkable sleeves shall be preferable to

counter erosion due to pollution. 5.3 Push on type (Terminations only) : 5.3.1 Rubber components should be made from proven quality of tuber

with tested curing properties. 5.3.2 The semi conducting portion of the stress cone should be

vulcanized with insulation so that both semi conducting and insulation portion becomes an integrated part.

5.3.3 The stress cone must ;be of proven design of stress control. 5.3.4 The moulding of rubber components should be aimed to achieve a

smooth finish on interior and exterior of the components. 5.3.5 The stress cone should probably be reusable type. 5.3.6 In case of outdoor terminations, the suitable provision for covering

the cable cores with re-useable protective system from the crotch seal to the bottom of stress cone should be made.

Page 3 of 10

5.4 Other Requirements : 5.4.1 Proper stress control, stress grading and non tracking arrangement

in the terminations shall be offered by means of proven methods, details of which shall be elaborated in the offer. Detailed sectional view of assemblies shall be submitted alongwith the offer.

5.4.2 The kits offered shall provide the total environment sealing, the

details of which shall be offered alongwith the offer. 5.4.3 Provision for effective screening over each core be made and

bidders shall categorically conform this aspect in their offer. 5.4.4 The material and components not specifically stated in the

specification, but which are essential for satisfactory operation of the equipments shall be included without any extra cost.

5.4.5 The terminations shall be of better tracking resistant properties and

fully reliable earthing system to maintain continuous contact with screening/armouring as the case may be.

5.4.6 The armour earthing arrangement shall form part of the termination. 5.4.7 Terminations shall have provision for shield connections and

earthing. 5.4.8 The kits shall be suitable for storage without deterioration at a

temperature upto 50oC for more than 5 years. 5.4.9 The fault level (as well as duration) withstand capability of

terminations should be strictly matching with these parameters of cables for which the kits are intended to be used.

5.4.10 The words DHBVN/UHBVN alongwith trade name of manufacturer,

month/year of manufacturer, size etc. shall be embossed/engraved or suitably marked with indelible ink/paint for the purpose of identification.

5.4.11 Suitable creepage extension/rain protection sheds for outdoor

termination shall be provided. 5.4.12 The adequate provisions for eliminating the chances of entrapment

of air at the steps formed by semicon screen shall be made. 5.4.13 The gripping tubing (termination boot) for the cable where

trifurcation takes place, shall also be part of kit and covered under scope of this supply of this specification.

5.4.14 Name of sub-supplier for the raw material and standard according

to which their raw material are tested, must be furnished alongwith the offer.

Page 4 of 10

5.4.15 Detailed kit contents, whether manufactured by the bidder or bought from outside (with name of sub vendor) for each component must be indicated in the offer.

5.4.16 The; terminations shall be supplied in kit forms. All insulating and

sealing materials, consumable items, conductor fittings, earthing arrangements and lugs etc. shall be included in the individual kit.

5.4.17 An instruction manual in English, indicating the complete

method/procedure to be adopted for installation of kits, preferably with more and more diagrams/pictorial presentation shall be supplied with each kit. Various items quantity there of against each kit must be indicated in the instruction manual.

6. GUARANTEED TECHNICAL PARTICULARS :-

The terminations shall have same electrical and thermal characteristics as those of cables with which these are intended to be used. The tenderers must furnish the guarantee technical particulars for each type/size of kit ;in Annexure-‘A’.

7. CONSUMABLES OR RE-USABLE PUSH ON TYPE KITS :-

The details of consumable viz-a-viz reusable parts for each size of push on type (indoor/outdoor separately) termination must be supplied on a separate sheet. The %age of consumables for reusing these kits must be indicated for each size.

8. DRAWINGS :-

Complete detailed dimensional drawings showing all details of kit contents/bill of material for each size type.

Note : Any tender without complete guaranteed technical particulars and dimensional drawings shall be liable for rejection :

9. TRAINING :-

In case of placement of an order against this tender enquiry, the tenderer shall have to impart free of cost demonstration to selected number of Nigam personnel by installing few kits any where in Haryana, places of Purchaser’s discretion. If required, supplier may have to give free of cost practical training regarding installation of their product in NiIgam training institutes also.

Page 5 of 10

10. TESTS :-

10.1 Type tests :

The termination kits of offered design should have been got tested from NABL accredited laboratory as per relevant standards with latest version.

10.2 Acceptance Tests :

Initially the following tests shall constitute as acceptance tests :- i) Dimensional checking as per approved drawings. ii) Volume resistivity test for various components. iii) AC High voltage test after installation of terminations (as per IS :

13573/1992 or VDE-0278) on appropriate cable. iv) Dielectric strength of major components. v) D.C. High voltage test. vi) Tracking resistance. vii) Ultimatic Elongation.

The scope to include more type tests as acceptance tests shall be decided after processing the offers of various bidders/after knowing the details of testing facilities for type tests available with various tenders.

IMPORTANT : The tenderers must specifically mention in their offer about the details of testing facilities for various type test as per IS : 13573/1992 and or VDE-0278, available at their works, failing to do so, the offer is liable to be rejected on the presumption that adequate testing facilities are not available with them.

ROUTINE TESTS :- The following tests shall constitute routine test : i) Dielectric strength. ii) Density. iii) Heat shock. iv) Shrinkage ratio. The tenderer must specify the details of routine tests (being conducted at their works ) alongwith the standard applicable, in their offer. The routine test certificates shall be furnished alongwith the inspection call for each offered lot.

11. INSPECTION :

The material shall be made, inspected and tested in the presence of the authorized representative of the Nigam at the manufacturer’s/suppliers works at the cost of the suppliers. In case the supplier is not in a position to get these tests carried out at his works,

Page 6 of 10

then the material should be got tested in the presence of authorized inspecting officer of Nigam from any other testing agency or from the Govt. recognized testing agency. All the expenses incurred to this effect shall be borne by the supplier. The purchaser or his authorized representative shall have access at all reasonable times to the manufacturer’s works to inspect and witness the tests. The purchaser have the right to have the tests carried out at the cost of the supplier by an independent agency wherever there is dispute regarding the quality of the material supplied.

The manufacturer shall be responsible to pay penalty of Rs 20,000/- for each occasion at which the fake inspection call has been made or the material is rejected during testing/inspection by the authorized agency/representative of the Nigam. This penalty would be in addition to the expenses incurred by the Nigam in deputing the Inspecting Officer, carrying out such inspection.

12. PACKING AND TRANSPORT :

The supplier shall be responsible for suitable packing of all the kits of material and marking on the consignment, so as to avoid any damage during transport and storage and to ensure correct dispatch to the destination.


The material offered/received after the inspection by the authorized inspecting officer may again be subjected to the test for or any parameter from any testing house/in-house technique of the Nigam & the results if found deviating un-acceptable or not complying to approved GTP’s the bidder shall arrange to supply the replacement within thirty (30) days of such detection at his cost including to & fro transportation. In addition , penalty @10% of cost of the inspected lot of material shall be imposed.

14. Warranty Period:-

The supplier shall be responsible to replace, free of cost, with no transportation or insurance cost to the purchaser, up to destination, the whole or any part to the material which in normal and proper use proves the defective in quality or workmanship, subject to the condition that the defect is noticed within 24 months from the date of receipt of material in stores or 18 months from the date of commissioning whichever period may expire earlier. The consignee or nay other officer of Nigam actually using the material will give prompt notice of each such defect to the supplier. The replacement shall be effected by the supplier within a reasonable time, but not, in any case, exceeding 45 days. The supplier shall, also, arrange to remove the defective within a reasonable period, but not exceeding 45 days from the date of issue of notice in respect thereof, failing which, the purchaser reserve the right to dispose of defective material in any manner considered fit

Page 7 of 10

by him (purchaser), at the sole risk and cost of the supplier. Any sale proceeds of the defective material after meeting the expenses incurred on its custody, disposal handling etc., shall however be credited to the supplier’s account and set off against any outstanding dues of the purchaser against the supplier. The warranty for 18/24 months shall be one time.

Director/Technical-I, UHBNV, Panchkula

Director/Project,DHBVN, Hisar

CGM/PD&C, UHBVN, Panchkula

CGM/P&D, DHBVN, Hisar.

FA & CAO/MM, UHBNV, Panchkula

FA & CAO/MM, DHBVN, Hisar

GM/P&D, UHBNV, Panchkula

GM/P&D, DHBVN, Hisar

Page 8 of 10

ANNEXURE-‘A’ SCHEDULE OF GUARANTEED TECHNICAL PARTICULARS FOR TERMINATIONS OUTDOOR / INDOOR TERMINATION KIT H.S. PUSH ON 1. Manufacturer’s name & Address.

2. Sr. No. & name and country of origin.

3. Voltage grade.

4. Type of kit offered.

5. Applicable standards.

6. Size.

7. Material of tubing/moulded part/self amalgamating tape etc.

8. Insulation time.

9. Curing time.

10. Time required for energisation after completion of termination.

11. Special devices required, if any.

12. Kit storage temperature (Degree centigrade).

13. (a) Shelf life of kit.

(b) Design life of kit.

14. List lof contents of kit (to be furnished separately)

15. Material used for stress control.

16. Dielectric strength of insulation material (KV/mm).

17. Materials used in encapsulating compound and environmental sealing.

18. Class of kit.

19. Whether test reports, drawings land instruction leaf lets are enclosed.

20. Volume resistivity.

i) Stress control tubing.

ii) Non tracking tubing.

21. Relative permitivity.


ii) Non tracking tubing.

22. Water absorption.


ii) Non tracking tube.

23. Tracking resistance.

Page 9 of 10

i) Stress control tube.


24. Tensile strength.

i) Stress control tube.


25. Ultimate elongation

(a) Stress control tube.

(b) Non tracking tube.

Note : While giving details of technical parameters under Sr. No. 20 to 25 above,

the reference of applicable relevant ISS/international standard must be indicated.

Page 10 of 10

of 15

Specification No. CSC-45/R-1/DH/UH/P&D/2010-2011

TECHNICAL SPECIFCATION

FOR

3PHASE 4 WIRE CT/PT OPERATED FULLY STATIC AMR COMPATIBLE TRI‐VECTOR ENERGY METERS

FOR

AREA RING FENCING, HT CONSUMERS/ FEEDER METER &

STATIC LT / CT OPERATED METERS

Issue Month: Common Specifications Committee UHBVN & DHBVN

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1.0 SCOPE Design, manufacturing, testing, supply and delivery of AC, 3 Phase, 4 Wire, CT/PT operated fully Static and AMR compatible Tri-Vector Energy Meters for measurement of different electrical parameters listed elsewhere in the document including Active Energy (kWh), Reactive Energy (kVArh), Apparent Energy (KVAH) etc. The detail scope is given below.

2.0 APPLICATION a) As Boundary Meters for Ring fencing of an Area, b) In Substation on incoming/Outgoing HT feeders, c) On Distribution Transformers d) LT and HT Consumers 3.0 STANDARDS TO WHICH METERS SHALL COMPLY Guidelines on “Data Exchange for Electricity Meter Reading, Tariff and Load Control – Companion Specification” enclosed with this document as annexure. IS: 14697 /1999 (reaffirmed 2004) Specification for AC Static Transformer operated Watt Hour & VAR-Hour meters (class 0.5S); IS-15707 Specification for Testing, evaluation, installation & maintenance of AC Electricity Meters-Code of Practice The equipment meeting with the requirements of other authoritative standards, which ensure equal or better quality than the standard mentioned above, also shall be considered; in case of conflict related with communication protocol, the Guidelines on “Data Exchange for Electricity Meter Reading, Tariff and Load Control – Companion Specification” enclosed with this document as annexure shall prevail upon. For conflict related with other parts of the specification, the order of priority shall be – i) This technical specification ii) IS: 14697 /1999 (reaffirmed 2004). 4. CLIMATIC CONDITIONS:-The Static Energy Meter shall be suitable for satisfactorily working under the following climatic conditions.


2. Min. ambient air temperature (-)50C

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3. Average Daily Max. ambient temperature 400C

4. Max. yearly weighted average ambient temperature

320C

5. Max. altitude above mean sea level 1000 m





10. Maximum wind pressure 195 kg/m2

5 GENERAL TECHNICAL REQUIREMENTS

1 TYPE AMR Compatible Static, 3 Ph, 4 Wire Tri-Vector Energy Meter

2 FREQUENCY 50 Hz ±5% 3 ACCURACY

CLASS 0.5S

4 SECONDARY VOLTAGE

1.For CT/PT operated HT meters-Suitable for operation from 110V Ph-Ph or 63.5V Ph-N 2.For distribution transformer and other LTCT operated Meters- Suitable for operation from 415V Ph-Ph or 240 V Ph-N

5 BASIC CURRENT (Ib)

-/5 Amps. as per existing CT for -feeders

6 MAXIMUM CONTINUOUS CURRENT

2.0 Ib; Starting and Short time current shall be as per IS-14697

7 POWER CONSUMPTION

i) The active and apparent power consumption, in each voltage circuit, at reference voltage, reference temperature and reference frequency shall not exceed 1. 5 W and 8 VA.

ii) The apparent power taken by each current circuit, at basic

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current, reference frequency and reference temperature shall not exceed 1.0 VA

8 POWER FACTOR 0.0 Lag -Unity- 0.0 Lead 9 DESIGN Meter shall be designed with application specific integrated

circuit (ASIC) or micro controller; shall have no moving part; electronic components shall be assembled on printed circuit board using surface mounting technology; factory calibration using high accuracy (0.05 class) software based test bench.

6.0. CONSTRUCTIONAL REQUIREMENT/ METER COVER & SEALING ARRANGEMENT

6.1 METER CASE: The meter case & cover will either be ultrasonically welded or shall have push fit type arrangement with two no. polycarbonate seals, of good quality, one each on either side, so that meter’s internal parts are only accessible after breaking seals, ultrasonic welding, push fit arrangement or case cover of the meter and it should become unserviceable. The material for base and cover (transparent / translucent) of the meter shall be of Polycarbonate. The meter shall be factory calibrated and shall have unidirectional screws, fully embedded so that these cannot be unscrewed by means of pliers etc. for sealing. The meter case shall have at least three mounting holes. 2 holes for mounting screws, on the terminal block; sealed beneath the terminal cover and one for hanging screw on the top.

6.2 WINDOWS: -The meter cover shall be of Toughened Glass or Reinforced Polycarbonate

material with one window. The window shall be of transparent material, ultrasonically welded with meter cover / part & parcel of meter cover so that it cannot be removed undamaged; without breaking the meter cover.

6.3 TERMINALS AND TERMINAL BLOCK: The terminals may be grouped in a terminal

block having adequate insulating properties and mechanical strength. The terminal block shall be made from best quality non - hygroscopic, flame retardant material (capable of passing the flammability tests, as per IS -11731) with nickel-plated brass or aluminium alloy for connecting terminals. The clamping screw should be provided inside the terminal cover and should have metallic sleeve molded within the block to avoid damage during tightening of the screws. The terminals in the terminal block shall be of adequate length in order to have proper grip of conductor with the help of two screws through agency of a plate so as to made cage type arrangement. The manner of fixing the conductors to the terminals shall ensure adequate and durable contact such that there is no risk of loosening or undue heating. Screw Connections, transmitting contact force and screw fixing, which may be loosened and tightened several times during the life of the meter, shall screw into a meter nut. All parts of each terminal shall be such that the risk of corrosion, resulting from contact with any other meter part, is minimized. Two screws shall be provided in each current terminal for effectively clamping the external leads or

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thimbles. Each clamping screw shall engage at least 3 threads in the terminal. The ends of screws shall be such as not to pierce the conductor. Electrical connections shall be so designed that the contact pressure is not transmitted through insulating material. For current circuits, the voltage is considered to be the same as for the related voltage circuit. The internal diameter of terminal holes shall be 5.5mm (min.) The clearances and creep age distances shall confirm to clause 6.60 of IS: 13779 /1993.

It shall conform to IS 11731 (FH-1category) besides meeting the test requirement of heat deflection test as per ISO 75, glow wire test as per the IS:11000 (part 2/SEC-1) 1984 OR IEC PUB,60695-2-12, Ball pressure test as per IEC--60695-10-2 and Flammability Test As per UL 94 or As per IS 11731(Part-2) 1986

6.4 TERMINAL COVER:- The terminal cover shall be extended type, which can be sealed

independently of the meter cover. The terminal cover shall enclose the actual terminals; the conductor fixing screws, the external conductors and their insulation i.e. no part of meter or cable / accessories shall be visible from the front of the meter. When the meter is mounted, no access to the terminal shall be possible without breaking the seal (s) of the meter terminal cover. The terminal cover shall have at least two sealing screws. The fixing screws used on the terminal cover for fixing and sealing shall be kept captive in the terminal cover.

6.5 SEALING: - 2 no unidirectional sealing screw shall be provided for proper fixing of meter

cover with 2 no good quality polycarbonate seals, one each on either side, so that the meter internal parts are only accessible after breaking the seals, ultrasonic welding, push fit arrangement or case cover of the meter. Separate sealing arrangements shall be provided for MDI reset and communication port. In addition, the firm / supplier shall affix 2 no good quality, numbered hologram, on base and cover; one on each side and its record should be forwarded to the Nigam.

7.0 WORKING ENVIRONMENT As per IS 14697-1999 (reaffirmed 2004). Meter to perform satisfactorily under Non-Air Conditioned environment (within stipulations of IS) Meter body will conform to IP51 degree of protection. For outdoor use meter shall be installed in sealed enclosure conforming to IP 55. The meter shall be suitable designed for satisfactory operation under the hot and hazardous tropical climate conditions and shall be dust and vermin proof. All the parts and surface, which

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are subject to corrosion, shall either be made of such material or shall be provided with such protective finish, which provided suitable protection to them from any injurious effect of excessive humidity. 8.0 MANUFACTURING PROCESS, ASSEMBLY AND TESTING Meters shall be manufactured using latest and ‘state of the art’ technology and methods prevalent in electronics industry. The meter shall be made from high accuracy and reliable surface mount technology (SMT) components. All inward flow of major components and sub assembly parts (CT, PT, RTCs/Crystal, LCDs, LEDs, power circuit electronic components etc.) shall have batch and source identification. Multilayer ‘PCB’ assembly with ‘PTH’ (Plated through Hole) using surface mounted component shall have adequate track clearance for power circuits. SMT component shall be assembled using automatic ‘pick-and-place’ machines, Reflow Soldering oven, for stabilized setting of the components on ‘PCB’. For soldered PCBs, cleaning and washing of cards, after wave soldering process is to be carried out as a standard practice. Assembly line of the manufacturing system shall have provision for testing of sub-assembled cards. Manual placing of components and soldering, to be minimized to items, which cannot be handled by automatic machine. Handling of ‘PCB’ with ICs/C-MOS components, to be restricted to bare minimum and precautions to prevent ‘ESD’ failure to be provided. Complete assembled and soldered PCB should undergo functional testing using computerized Automatic Test Equipment. Fully assembled and finished meter shall undergo ‘burn-in’ test process for 12 hrs at 55 degree Celsius (Max. temperature not to exceed 60 degree Celsius) under base current (Ib) load condition. Test points should be provided to check the performance of each block/stage of the meter circuitry. RTC shall be synchronized with NPL time at the time of manufacture. Meters testing at intermediate and final stage shall be carried out with testing instruments, duly calibrated with reference standard, with traceability of source and date. 9.0 DISPLAYS The meter shall have 7 digits (with ±indication), parameter identifier, backlit Liquid Crystal Display (LCD) of minimum 10 mm height, wide viewing angle. Auto display cycling push button required with persistence time of 10 Seconds. LCD shall be suitable for temperature withstand of 70 deg C; Sequence of display of various instantaneous electrical parameters shall be as desired by Purchaser at the time of order. The data stored in the meters shall not be lost in the event of power failure. The meter shall have Non Volatile Memory (NVM), which does not need any battery backup. The NVM shall have a minimum retention period of 10 years.

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10.0 PERFORMANCE UNDER INFLUENCE QUANTITIES The meters performance under influence quantities shall be governed by IS 14697-1999 (reaffirmed 2004). The accuracy of meter shall not exceed the permissible limits of accuracy as per standard IS: 14697 (latest version). 11.0 OUTPUT DEVICE Energy Meter shall have test output, accessible from the front, and be capable of being monitored with suitable testing equipment while in operation at site. The operation indicator must be visible from the front and test output device shall be provided in the form of LED. Resolution of the test output device shall be sufficient to enable the starting current test in less than 10 minutes. 12.0 REAL TIME INTERNAL CLOCK (RTC) RTC shall be pre-programmed for 30 Years Day/date without any necessity for correction. The maximum drift shall not exceed +/- 300 Seconds per year. The clock day/date setting and synchronization shall only be possible through password/Key code command from one of the following:

a) Hand Held Unit (HHU) or Meter testing work bench and this shall need password enabling for meter;

b) From remote server through suitable communication network or Sub-station data logger ‘PC’.

13.0 QUANTITIES TO BE MEASURED & DISPLAYED The meter shall be capable of measuring and displaying the following electrical quantities within specified accuracy limits for polyphase balanced or unbalanced loads:

a) Instantaneous Parameters such as phase and line voltages, currents, power factors, overall kVA, kW, kVAr, power factor, frequency etc as per details given in the table below and enclosed annexure.

b) Block Load Profile Parameters such as kVAh/kWh/kVArh (lag/lead)/Maximum Demand (MD) in kW/kVA/power factor/phase and line voltages/currents etc (minimum 5 parameters) as per details given in the table below and enclosed annexure.

c) Daily Load Profile Parameters such as cumulative energy kWh (import/export)/cumulative kVAh (while kW- import/export)/cumulative energy kVArh (quadrant-1/2/3/4)/reactive energy high (V>103%)/low (V<97%), etc as per details given in the table below and enclosed annexure.

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In addition to above the meter shall also record the Name plate details, programmable parameters (readable as profile), occurrence and restoration of tamper events along with the parameters (Table A5.1, A5.2 and A6.1 to A6.8 respectively of enclosed guideline document) Detail of category wise parameters requirement suitable for specific location such as feeder/DT metering, interface points/boundary points is given in following tables of guidelines document enclosed as annexure:

Category Parameter group Annexure Table

No. Instantaneous parameters A2.1 Substation Feeder/ Distribution

Transformer meter Block Load Profile parameters

A2.2

Instantaneous parameters A3.1 Block Load Profile parameters

A3.2 Boundary/Ring fencing/Interface Meters

Daily Load Profile parameters

A3.3

Instantaneous parameters A4.1 Block Load Profile parameters

A4.2 HT Consumer Meters

Billing Profile parameters A4.3 Name Plate details A5.1 Programmable Parameters A5.2

Substation Feeder/ Distribution Transformer/Boundary/Ring fencing/Interface/HT Consumer Meters

Event Conditions A6.1 to A6.7

Logging parameters for each of the event condition – shall be selected

Capture parameters for event as applicable (Event Log Profile)

A6.8

14.0 DEMAND INTEGRATION PERIOD The maximum demand integration period may be set at 15 minute or 30 minute by purchaser as per requirement. 15.0 MD RESET It should be possible to reset MD by the following options:

a) Communication driven reset b) Local push button c) Auto reset at 24:00 hrs at the end of each billing cycle

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16.0 MARKING OF METERS The marking of meters shall be in accordance with IS: 14697 /1999 (reaffirmed 2004). The meters shall bear marking “Purchased under R-APDRP scheme/property of DHBVN/UHBVN”. The meter shall also store name plate details as given in the table A5.1 of annexure. These shall be readable as a profile as and when required. 17.0 COMMUNICATION CAPABILITY The meter shall be provided with two ports for communication of the measured/collected data as per guideline document enclosed in the annexure, i.e. a hardware port compatible with RS 232 or RS 485 specifications which shall be used for remote access through suitable Modem (GPRS/GSM/EDGE/CDMA/PSTN/LPR) and an Optical port complying with hardware specifications detailed in IEC-62056-21. This shall be used for local data downloading through a DLMS compliant HHU. One-meter long cable, of suitable size, having facility at one end, for connecting to the optical port, other end shall be provided with RS – 232 Connector shall be provided, as spare cable, so that the optical port can be brought out the meter box. The meter shall have necessary facilities to transfer the data via the communication port, the hand held data collection device (DCD) and also to down load this on a P.C to get complete details in numeric form. The necessary software for this purpose shall be provided by the supplier, without any condition, free of cost The RS 485 port shall be used at Substations suitable for multi-drop connections of the meter for exporting data to sub-station data logger/DCU/Computer and the remote end server. The RS 232 port shall be used at boundary points meters and Distribution Transformer meters capable to transfer and export data to the remote end server through suitable communication mediums (GPRS/GSM/EDGE/CDMA/ PSTN/LPR). Both ports shall support the default and minimum baud rate of 9600 bps. 18.0 HAND HELD UNIT (HHU)

To enable local reading of meters data a DLMS compliant HHU shall be used. The HHU shall be as per specification given in the enclosed guidelines document. It shall be compatible to the DLMS compliant energy meters that are to be procured/ supplied on the basis of this specification. The HHU shall be supplied by the meter manufacturer along with the meter. Numbers of HHU to be procured shall be decided by the purchaser. 19.0 TAMPER & FRAUD MONITORING FEATURES The meter shall work satisfactorily under presence of various influencing conditions like External Magnetic Field, Electromagnetic Field, Radio Frequency Interference, harmonic Distortion, Voltage/Frequency Fluctuations, and electromagnetic High Frequency Fields etc.

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The meter shall be immune to abnormal voltage/frequency generating devices and shall record the occurrence and restoration of such tamper events along with parameters such as current, voltages, kWh, power factor, event code, date & time etc. (listed in Table A6.1 to A6.7 in enclosed document). Tamper details shall be stored in internal memory for retrieval by authorized personnel through either of the following: i) HHU. ii) Remote access through suitable communication network. Minimum 200 numbers of events (occurrences & restoration with date & time) should be available in the meter memory. 20.0 TYPE TESTS The meter offered should have successfully passed all type tests described in the IS 14697 and the meter Data Transfer and Communication capability as per enclosed guidelines document. Type test certificate shall be submitted along with the offer and the same shall not be more than 36 months old at the time of bid submission. Make & type of major components used in the type-tested meter shall be indicated in the QAP. The condition are to be relaxed by the purchasers (utilities) for the bids to be issued in next six months (i.e. upto Feb 2010) to accommodate design, development and testing of the new standard meters, conforming to the guidelines document enclosed as annexure, by manufacturers. The bidder shall have to submit the required type test certificate (as per bid requirement) to the purchaser (utility) at the time of meters delivery. Further Purchaser shall reserve the right to pick up energy meters at random from the lots offered and get the meter tested at third party lab i.e. CPRI / agencies listed at Appendix-C of Latest – standardization of AC static electrical energy meters – CBIP publication NO.-304/ NPL / CQAL/ ERTL / ERDA at the sole discretion of the Purchaser. The supplier has no right to contest the test results of the third party lab or for additional test and has to replace/take corrective action at the cost of the supplier. It shall be the responsibility of the supplier to arrange such tests and Purchaser shall be informed of the date and time of conduction of tests well in advance to enable him to witness such tests. Test charges of the testing authority, for such successful repeat type tests, shall be reimbursed at actual by the Purchaser. 21.0 ACCEPTANCE & ROUTINE TESTS

Criteria for selection for such tests and performance requirements shall be as per IS 14697-1999 (reaffirmed 2004)

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Additional acceptance shall include Surge withstand (SWC) for 6 kVp as per IEC 62052-11, Lightning impulse test and HF disturbance test as per IS 14697. One sample meter per order from one of the offered lot shall be subjected to these specific tests. Meters subjected to these tests shall not be used after tests. Accuracy tests shall be performed at the beginning and at the end of the acceptance tests specified. 22.0 QUALITY ASSURANCE: The manufacturer shall have a comprehensive quality assurance program at all stages of manufacture for ensuring products giving reliable, trouble free performance. Details of the bidder’s quality assurance and test set up shall be furnished with the bid. A detailed quality assurance program shall be finalized with the successful bidder during the award stage. Bidder shall furnish following information along with his bid: i) Organization structure of the manufacturer and his main sub-suppliers (PCBs, SMT

cards, CT/PT) with details of ‘QA’ setup, overall workflow; ii) Copy of system manual showing ‘QAP’ (Quality Assurance Plan) as actually practiced

during manufacturing and final testing. iii) List of raw materials and critical components (ASIC chip, crystal clock, memory register

Chip, transformers, optical ports etc.) with their suppliers; iv) Stage inspection of product before final testing; v) Procedure adopted for ‘In-situ’ testing of PCBs, after placement of surface mounted

component, for quantitative parametric variation of tolerance by self or sub-contractor. vi) Testing and calibration facility, date of calibration of test bench, manpower data of bench

operators; vii) Sample copies of test certificate of bought out components. viii) The manufacturer shall be responsible to pay penalty of Rs 20,000/- for each

occasion at which the fake inspection call has been made or the material is rejected during testing/inspection by the authorized agency/representative of the Nigam. This penalty would be in addition to the expenses incurred by the Nigam in deputing the Inspecting Officer, carrying out such inspection.

23.0 QUALIFYING REQUIREMENTS

i) Bidder should be a manufacturer; ii) He should have all the facility in his works for design, assembly, quality assurance, burn-

in test (Fully assembled Energy Meter), testing (all routine and acceptance tests), automatic calibration of Energy Meter on software based test bench, qualified team of technical and software engineers;

iii) The average annual turnover of the manufacturer for Energy meters for the three (3) best financial years out of last five (5) years, should be at least Rs.** …………… Lakhs. (** is 2 x Package Cost x 12/ Work completion schedule in Months)

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iv) Notwithstanding anything stated herein under, the Purchaser reserves the right to assess the capacity and capability of the bidder to execute the work, should the circumstances warrant such assessment in the overall interest of the Purchaser.

24.0 GUARANTEE The meter shall have a designed life of at least 10 years and the supplier shall be responsible

to replace, free of cost, with no transportation or insurance - cost to the Nigam, up to destination, the whole or any part of the material which, under normal and proper use, proves defective in quality or workmanship, subject to the condition that the defect is noticed within 78 months from the date of receipt of material by the consignee or 72 months from the date of installation, which ever period may expire earlier. The consignee or any other officer of the Nigam, actually using the material, will give prompt notice of each such defect to the supplier as well as the Purchasing Authority and the Controller of Stores. The replacement shall be affected by the supplier within a reasonable time, but not, in any case, exceeding 45 days. The supplier shall also arrange to remove the defective supply within reasonable period but not exceeding 45 days from the date of issue of the notice in respect thereof.

Upon the firm failing to do so, the damages / defects may be got rectified by the Nigam and the cost adjusted from the firm’s pending dues and/or security deposit against this or any other contract in force and the balance left be got deposited by the supplier. The Nigam may withhold the amount, equal to cost of defective material. These provisions shall, also equally apply to the replaced material. In case, the material is again found to be defective within warranty period, it shall, also, have to be replaced similarly. The purchaser shall recover an equivalent amount plus 15% supervision charges, if the defective material is not repaired / replaced with in the above specified period.

25.0 FIXING & CONNECTION ARRANGEMENT Manufacturer shall ensure following technical points:

i) Meter shall be suitable for mounting on Simplex type vertical panel with front door; CAT-M4 disconnecting type TBs to be used for Current circuit; Panel wiring to be properly dressed and harnessed; External cables to enter panel from bottom gland plate using double compression glands.

ii) Meter installation & Inter-connection from existing CT/PT connections to energy meters in the panel shall be in the scope of contractor/bidder. The external cabling from existing CT/PT to Energy Meter panel shall be in the scope of purchaser.

iii) Energy Meter terminals block shall be adequately sized with regard to maximum conductor dimension, commensurate with current rating of Energy Meter.

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26.0 CHALLENGE CLAUSE:

The material offered/received after the inspection by the authorized Inspecting Officer may again be subjected to the test for losses or any other parameters from any testing house/in house technique of the Nigam having requisite capabilities and facilities. The results if found deviating/ unacceptable or non-complying to approved GTPs the lot shall be rejected and bidder shall arrange to supply the replacement within thirty (30) days of such detection at his cost including to & fro transportation. In addition to this penalty @10% of cost of the inspected lot of material shall be imposed.

Application Guide for users of this specification

1. The specification does not contain constructional details and methods of sealing of the

meter COVER and the terminal sizes required for the Purchasers incomer cables. These may be added suitably as per the requirements of individual users. Quantities of meters required with / without meter COVER needs to be specified in the Bill of Quantities in the NIT specifications.

2. The NIT specification shall suitably incorporate the appropriate Qualifying Requirements considering the quantity of meters intended to be procured.

The specification no. CSC- XXXII & XXXIII / DH/UH/P&D/2009-2010 be hereby considered withdrawn.

Director/Project,

UHBVN, Panchkula

Director/Project,

DHBVN, Hisar

CGM/PD&C,

UHBVN, Panchkula

CGM/P&D,

DHBVN, Hisar.

FA & CAO/MM,

UHBVN, Panchkula

FA & CAO/MM,

DHBVN, Hisar

GM/P&D,

UHBVN, Panchkula

GM/P&D,

DHBVN, Hisar

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ANNEXURE - A

GUARANTEED TECHNICAL PARTICULARS FOR CT / PT OPERATED TRIVECTOR METERS /LT CT meter

1) Maker’s Name

2) Meter Make & Type

3) Fixing Arrangement

4) Basic current (Amperes)

5) Rated Maximum Continuous Current (Amperes)

6) Standard Reference Voltage & Frequency

7) Class of accuracy

8) Power Loss in each

i) Voltage circuit

ii) Current circuit

9) Minimum Starting Current

10) Type of display

11) No. of Digits

12) Type of output Device

13) Clearances and creepage distance in the

I. Terminal Block

II. Terminal cover

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III. Internal parts of the meter

14) Material of

I. Terminal Block

II. Terminal cover

15) Material of Terminals

16) Material of Meter Frame/Cover

17) Window arrangement & material

18) Number of seals provided

I. Main Meter Cover

II. Meter Terminal Cover

19) Total weight of the Meter

DAKSHIN HARYANA BIJLI VITRAN NIGAM

Office of the Chief General Manager/P&D,

Vidyut Sadan, Vidyut Nagar,

Hisar-125005

Tel: 01662-221285, 221830 (GM/P&D) Fax: 01662-220481

Technical Specification

For

UNARMOURED COPPER CONTROL CABLES. Chief General Manager / P&D,

DHBVN, Hisar

Issue of the Month:

Page 418 of 466

TECHNICAL SPECIFICATION FOR UNARMOURED COPPER CONTROL CABLES.

1.0 SCOPE:

1.1 This specification provides for design, engineering, manufacturer, stage testing, inspection

and testing before despatch, packing, forwarding and delivery C.I.P. destination ( for Indian

Bidders) and C.I.F. Indian Port/FOB at the discretion of the purchaser ( for foreign bidders) of

Unarmoured Copper Control Cables.

1.2 It is not the intent to specify complete here in all details of the design and construction of

material. However, the material shall conform in all respect to high standards of engineering

design and workmanship and shall be capable of performing in continuous commercial operation

up to the bidders guarantee acceptable to the purchaser, who will interpret in a manner the

meaning of drawings and specifications and shall have the power to reject any work or material

which in this judgment is not in accordance therewith. The material offered shall be complete in

all components necessary for its effective and trouble free operation. Such components shall be

deemed to be within the scope of supply irrespective of whether those are specially brought out

in this specification and or the commercial order or not. All similar parts particularly movable

ones shall be interchangeable.

2.0 STANDARDS: -

2.1 Copper control cable to be supplied shall be P.V.C. insulated P.V.C. sheathed unarmoured

for indoor and outdoor applications in air, in ground, in water and in concrete trenches. The

control cable shall conform in all respect to the requirements of IS-1554 (part-I) 1998 and its

subsequent amendments, if any at the time of placement of order.

2.2 Control cables meeting with the requirement of other authoritative Standards which ensure

equal or better performance than the standards mentioned above shall also be considered. When

the equipment offered by the supplier conforms to other standards adopted and the standards

specified in this specification shall be clearly brought out in the relevant schedule. Four copies of

such standards with authentic translation in English shall be furnished along with the offer.

3.0 PRINCIPLE PARAMETERS (TECHNICAL).

3.1 MATERIALS: -

All the materials used in the manufacturer of the cables shall be of the best available quality with

regards to strength, durability and shall be manufactured according to best engineering practices.

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3.2 CONSTRUCTIONAL FEATURES: -

The insulated cores shall be provided with inner sheath unarmoured but provided with an outer

sheath as specified in IS-1554 (part-I) 1988 amended up to date. The control cable offered shall

be suitable for use in system up to 1100 volts.

The conductors shall be composed of plain annealed high conductivity copper, which before

stranding shall be approximately circular in section, smooth, uniform in quality and free from

scale in-equalities spills, splits and other defects. The conductors shall conform to appropriate

dimensions and resistances as per IS-1554 (part-I) 1988.

4. GENERAL TECHNICAL PARTICULARS

4.1 INSULATION: -

The basic material employed as insulated compound shall consist of compounded polyvinyl

chloride (PVC) or suitable copolymers of which major constituent shall be vinyl chloride or

mixture of polyvinyl chloride and suitable co-polymers which have been suitably compound and

processed so as to comply with the requirements of IS-1554 (part-I) 1988.

The PVC compound going into the formation of insulation shall also comply with the provisions

of IS-5831-1970 “PVC insulation and sheath of electric cable”. The insulation shall with stand

the rigors of climate and site conditions and shall not crack or retract in normal use.

The colour code of the cores of control cable shall be as per clause 10.1 of ISS-1554(part-I)

1988. However the outer PVC sheath shall be black or grey. The colour coding as employed in

the formation of the cable for individual cores and sheath shall be indicated in the bid. The

PVC/co- polymer compounds going into the formation of the outer sheathing shall afford a high

degree of mechanical protection besides being oil and weather resistant.

4.2 MARKING: -

Every cable drum shall be clearly marked with indelible ink or with suitable weather resistant

paint and shall bear the following particulars: -

i. Manufacturer name and trade mark, if any.

ii. Purchase order no. and date.

iii. Year of manufacture.

iv. Nominal sectional area of conductor of the cable.

v. No. of cores.

vi. Type of cable and voltage for which it is suitable.

vii. Length of cable on the drum.

viii. Gross weight of the drum.

ix. Weight of tare.

x. Direction of rolling the drum.

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5. TESTS:

All the material offered shall be fully type tested as per relevant material standards. In case the

material of the type and design offered has already been type tested, the supplier shall furnish

four sets of the type tests reports along with the offer. The purchaser reserves the right to demand

repetition of some or all the type tests in the presence of Purchaser’s representatives. Acceptance

and Routine Tests: -

All acceptance and routine tests as stipulated in the relevant standards shall be carried out by the

supplier in presence of Purchaser’s representative.

6. INSPECTION: -

The purchaser shall have access at all times to the works and all other places of manufacture

where the copper control cables are being manufactured and the supplier shall provide

purchaser’s representative all facilities for unrestricted inspection of the work, raw materials,

manufacture of all the accessories and for conducting necessary tests as detailed herein.

The successful supplier shall keep the Purchaser informed in advance of the time of starting and

of the progress of manufacture of material in its various stages, so that arrangements could be

made for inspection.

No material shall be despatched from its point of manufacture unless the material has been

satisfactorily inspected and tested.

The acceptance of any quantity of the material shall in no way relieve the successful supplier of

his responsibility for meeting all the requirements of this specification and shall not prevent

subsequent rejection of such material is later found to be defective.

7. QUALITY ASSURANCE PLAN

The supplier shall invariably furnish following information along with his offer, failing which his

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

material offered.

� Statement giving list of important raw material, names of sub suppliers for the raw material,

list of standards according to which the raw material are tested.

� List of tests normally carried out on raw material in presence of supplier’s representative.

� Copies of test certificates.

� Information and copies of test certificates as in (1) above in respect of bought out items.

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� List of manufacturing facilities available.

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

� List of area in manufacturing process, where stage inspections are normally carried out for

quality control and details of such tests and inspections.

� Special features provided in the material to make it maintenance free.

� List of testing equipment available with the Supplier for final testing of material specified and

test plant limitation, if any vis-à-vis Type/special acceptance and Routine tests specified in the

relevant standards. These limitations shall be very clearly brought out in schedule of deviations

from specified test equipments.

The successful Supplier shall within 30 days of placement of order submit following information

to the purchaser.

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

from the lists furnished along with offer

� Type tests certificates of the raw material and bought out accessories.

� Quality Assurance Plan (QAP) with hold points for purchaser’s inspection. The quality

assurance plan and hold points shall be discussed between the purchaser and supplier before the

QAP finalised.

The successful Supplier shall submit the routine test certificates of bought out items and for raw

material at the time of routine testing of the Unarmoured Control Cables

8. PACKING AND FORWARDING: -

The cable shall be supplied in reels so constructed as to avoid any damage to the cable.

The reels should be able in withstand rough handling during transportation and storage. Any loss

on account of improper design of reels shall be borne by the supplier. The bidders shall clearly

state the standard length in which the cable shall be supplied alongwith tolerance, if any, in their

quotations. The cable wound on one drum shall be of continuous length and minimum length of

control cable per drum shall be 500 meters.

The Supplier shall be responsible for any damage to the equipment during transit due to

improper and inadequate packing. The easily damageable material shall be carefully packed and

marked with the

Page 422 of 466

appropriate caution symbols. Wherever necessary proper arrangement for lifting such as lifting

hooks etc. shall be provided. Any materiel found short inside the packing cases shall be supplied

by Supplier without any extra cost.

Each consignment shall be accompanied by a detailed packing list containing the following

information:

• Name of the consignee

• Details of consignment

• Designation

• Handling and unpacking instructions

• Bill of material indicating contents of each packing

• Total weight of consignment

The Supplier shall ensure that the packing list and bill of material are approved by the purchaser

before despatch

9. GUARANTEED TECHNICAL PARTICULARS:

The bidder shall give in his bid the guaranteed technical particulars of the cables. Any additional

information considered necessary by bidder (s) with a view to high-light the technical aspects of

his offer may also be supplied under this head. The bidder(s) shall clearly state the current rating

factors applicable to control cables as per item 21 of –GTP

Page 423 of 466

GUARANTEED TECHNICAL PARTICULARS OF UNARMOURED COPPER

CONTROL CABLES

(To be filled in separately for each size of the Unarmored Control cable by the supplier)

1. Name of manufacturer

2. Year of manufacture

3. No. of cores.

4. Cross-section of cores.

5. No. and diameter of wires

6. Shape of conductor

7. Material of conductor

8. Current carrying capacity.

9. Insulation thickness and material

10. Insulation resistance

11. Thickness and material of inner sheath

12. Nominal dia over inner sheath

13. Conductor resistance.

14. Colour scheme of cores

15. Thickness and material of outer sheath

16. Test voltage both A.C. and D.C.

17. Length of cable per drum

18. Net weight per drum length

19. Gross weight per drum

20. Current rating factors based on: -

� Variation in ground temperature

� Variation in ambient air temperature

� Groups laid direct in ground in horizontal formation

� Groups laid direct in ground in tier formation

� Depth of laying in ground

� Group laid in covered trenches in horizontal formation

21 Standard.

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