Bid Volume -II Sec Vii-ted-131

7/31/2019 Bid Volume -II Sec Vii-ted-131

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SPECIFICATIONS

Supply of material and Erection, testing andcommissioning of New 11 kV lines for bifurcation of 25

nos overloaded feeders and Augmentation of 88 nosexisting 11 kV feeders covered under Sirsa Circle on

turnkey basis.

VOLUME II

SECTION VII

BID NO. PD&C/TED 131/2010

DAKSHIN HARYANA BIJLI VITRAN NIGAM

HISAR

June-2010


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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 construction of new 11 KV lines for feeder

bifurcation and augmentation of overloaded 11 kV feeders under Sirsa circle on

supply-cum-erection (turnkey ) basis.

1.1 Scope :

1.1.1 This specification covers detailed survey, spotting of location of poles, supply and

erection of PCC poles in single pole support / double pole / 4 pole arrangement

with complete 11 KV line material such as disc insulators with fittings, 11 KV Pin

Insulators with Pins, V-Shape Cross arms, pole top bracket, straight X arms,

earthing material, guy sets with complete material with nuts & bolts washers, pole

clamps and all other required lines accessories and Belts & Bracings, ACSR

Conductor, AB Cable, Earth wire, fixing of insulator strings, stringing of

conductor and earth wire, fixing of stays and testing and commissioning of

erected 11 KV lines etc.

1.1.2 This specification also includes the supply of the poles, insulators and their

hardware, conductor, AB Cable, earth wire etc. The bidder shall clearly indicate

in his offer the sources from where he proposes to procure the raw material /

completed material and its components.

1.1.3 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.

1.1.4 The entire stringing work of the conductor,cable,messenger and earth wire shall

be carried out by standard practice. The bidder shall indicate in his offer the

detailed description of procedure to be deployed for stringing operation.

1.1.5 Location Details : The line shall be laid in the areas covered under DHBVN in

Haryana.

1.2 Details of Line Route and Terrain :


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The 11 KV Power Lines, LT lines etc will be running almost through plain and

cultivated area. Preliminary route alignment maps of Power lines covered under

this package giving the general topography and major crossings like river, power

lines, railway lines and roads are in the bidders scope. Wherever, special river

crossings are involved proper strengthening of the normal pole locations will be

done by the Contractor.1.3 Access to the Line and Right of Way :

Employer will facilitate and assist the contractor in getting clearance and

securing way leave and right of way from private/public/Govt owned

lands.However it shall be the responsibility of the contractor to conduct

preliminary survey before quoting the Bid and further getting clearance for right

of way during execution.The employer shall not be responsible for delay on this

account or pay any compensation in lieu of getting clearance /any damages for

right of way during execution of the project.

1.4 Detailed Survey of Optimization Pole Location :

1.4.1 The detailed survey for the line route and optimization of the pole location along

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

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

1.4.2 (a) The tentative sketches of the lines / works to be carried out are available in

the Office of the Nodal officer i.e. GM/Operation concerned from where

the same can be obtained. 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,

crossings accessibility, 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 as indicated on

sketch.

Pole & 4 Pole Structure as per site requirements shall be provided where

the situation so demands. Drawings of 2/4 Pole Structure is provided for

guidance.


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(b) Additional H Poles required for Pole Mounting Sub-Station under the

existing 11 KV feeders are to be taken care of by the Bidder as per the

requirement of Operation Organization.

1.4.3 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 berequired for obtaining topographical map.

1.4.4 Route Marking :

At the starting point of the commencement of route survey the peg marking shall

be done with iron spikes, driven firmly into the ground. A Benchmark on top

section of the angle iron shall be made to indicate the location of the survey

instrument. Teakwood peg shall be driven at prominent Position at intervals of

not more than 750 meters along the Power line to be surveyed up to the next angle

point. At angle position stone / concrete pillar with DHBVN marked on it shall

be put firmly on the ground for easy identification.

1.4.5 Pole Locations :

With the help of pole spotting data, pole locations shall be marked on the profiles

prepared to check the required ground clearances. While locating the poles on the

profile sheets the following shall be borne in the mind.

a) Extension:

An individual span shall be as near to the normal design span as possible. In case

an individual span becomes too short or long with normal supports on account of

ground profile, one or both supports of the spans may be extended with standard

design or provision of a special structure for the purpose according to technical

specifications. The design of such extension shall be prepared & supplied by the

Contractor and shall be got approved from the Employer.

b) Road Crossings :

At all the important road crossings, the protective cradle guarding will be

provided and poles shall be fitted with normal tension insulators strings

depending upon the location but the ground clearing at the roads at the maximum

temperature and in the still air shall be such that even with the conductor broken

at adjacent span, the ground clearance of the conductor from the road surface will


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not be less than 5.125 meter. For road and lines crossings 11 meter PCC poles

(400 Kg.) shall be provided to achieve required clearances. H pole structure on

11 meter PCC poles for road crossings and single 11 meter PCC poles for line

crossing shall be provided.

c) Railway Crossings :

The Contractor will make preliminary survey to assess the requirement ofRailway Crossing and take the same into account in his Bid. The work of

Railway Crossings will be got executed by him as a deposit work with the

Railways or otherwise as per rules of Railway Department. The Employer will

arrange to get the approval from Railway Authorities expedited. The case for

approval will be submitted by the Contractor on the behalf of the Employer well

in time.

d) Power Line Crossings :

Wherever the line is to cross over / below the other line of the same voltage or

higher or low voltage the requisite clearances will be ensured in accordance with

the Indian Electricity Rules. The Contractor shall submit and get approved from

the Employer any special design where required in order to achieve such

clearances.

e) River Crossing:

The route of 11 KV New / Augmented line/LT line if routed through a river bed /

mullah or rivulet must have concrete foundation for erection of poles and must be

supported by a good number of stay-supports capable to withstand water / wind

pressure and must be executed to the entire satisfaction of the Engineer.

f) In case the 11 KV U/G cable is to be laid along the Municipal Road / High way,

the Contractor will make preliminary survey to assess such requirement and take

into account in his Bid. The employer will arrange to get the approval from the

Civic Authorities. However, the case for approval will be submitted by the

Contractor on behalf of the employer well in time.

1.4.6 Clearance from Ground, Building, Trees etc.:

Clearance from Ground, Building, Trees and Telephone lines shall be provided in

conformity with the Indian Electricity Rules 1956.

1.4.7 The tree cutting shall be the responsibility of the Contractor at the time of survey

as well as during actual execution. However, the Contractor shall count, mark

and put proper Nos. with suitable quality of paint at his own cost on all the trees


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that are to be cut by him at the time of actual execution of work. Contractor may

please be note that the Employer shall not pay any compensation for any loss or

damage to the properties or for tree cutting necessitated due to Contractors work.

1.4.8 Any way leave which may be required by the Contractor shall be arranged by the

Employer.

1.4.9 To evaluate and tabulate the trees and bushes coming 6.096m on either side of thecentral alignment of the support, the trees will be numbered and marked with

quality paint serially from angle point 1 onwards and corresponding number will

be painted on the stem of trees at a height of 1m from ground level. The trees list

should contain the following information:

a) Girth (circumference) measured at a height of 1 m from ground level.

b) Approximate height of the tree with an accuracy of +/- 2 mtrs.

c) Name of the type of the species / tree.

1.4.10 The profile sheets duly spotted along with preliminary schedule indicating

position of poles, wind span, weight span, angle of deviation, river or road

crossings and other details 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.

1.5 Environmental Conditions :

1.6.1 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.

1.7 Technical Data:

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

1.8 Statutory Regulations and Standards :

1.8.1 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.

1.8.2 Reference Standards :


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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 internationallyaccepted standards, which ensure equivalent or better performance than those

specified shall also be accepted. All tested steel sections shall be supplied

conforming to relevant Indian Standard Specifications.

1.9 Quality Assurance, Inspection and Testing :

1.9.1 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.

1.9.2 Quality Assurance Document :

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

stipulated in quality plan at the time of Employers 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 Contractors

quality management programme.

1.9.3 Inspection and Testing :

The Employer shall inspect the major material i.e. Poles, Conductors, Earth wire,

Insulators, Pins, Hardware fittings 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

Contractors / Suppliers 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.


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2.0 Technical Parameters of 11 KV Line :

Electrical System Data :

a) Nominal Voltage 11 KV

b) Maximum system voltage 12 KV

c) BIL (Impulse) 75 KV (Peak)

d) Power frequency withstand voltage 28 KV

3. Details of line material for 11 KV Line(with ACSR):

3.1 Particulars of Conductor:

Sr.

No.

Particulars Conductor

1 Type ACSR 50 mm

2

2 Standing and wire diameter in mm 6/3.35(AI)

1/1.35(Steel)6/4.09(AI)

1/ 4.09 (steel)

3 Approximate Mass Kg. Per KM. 214/319

4 Approximate calculated breaking load KN 18.25/26.91

5 Calculated DC resistance at 20oC 0.5560 Ohm/0.3736 Ohm

6 Mass of Zine coating 190 gm.m2

7 Configuration of Conductor Triangular

3.2 Particular of Pin Insulator / Disc Insulators:

Sr.No. Particulars I-Pole Str. H-Pole Str. 4-Pole Str.

1 No. of Disc Insulators - 6 62 E&M Strength of each Disc

Insulator KN

45 45 45

3 11 KV Pin Insulator with Pins 3 3 6

4 E&M Strength of each PinInsulator KN

10 10 10

3.3 Material for Single / H-Pole/4 Pole Structure1 PCC Pole 11 Mtr. 1 No. 2 No. 4 No.

2 V-Shape Cross Arm 1 No. - -

3 M.S.Channel X-Arm (100x50x6-2200mm)

- 1 No. 5 Nos.

4 Pole Top Bracket 1 No. - -5 Back Clamps 1 No. As required As required

6 11 KV Pin Insulator with Pins 3 Nos. 3 Nos. 9 Nos.

7 11 KV Disc Insulators - 6 Nos. 6 Nos.

8 Guy Sets with stay wire As required 4 Nos. 8 Nos.

9 Earthing material as per design As required As required As required

10 Nuts & Bolts, Pole Clamps As per design As per design As per design

11 MS Flat, 50x50x6mm, 2200mm for

4-Pole &1400mm for H-Pole

- 2 Nos. -

12 MS Bracing 50x50x6mm, 3230mm - 2 Nos. 8 Nos.


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for 4-Pole &2860mm for H-Pole

13 Tension fittings suitable for 50

sq.mm conductor

- 6 Nos. 8 Nos.

14 P.G.Clamps for 50 sq.mm conductor - 6 Nos. 6 Nos.

15 Eye Screw bolts for earth wire 6 Nos

16 M.S.Angle 50x50x6mm (2400mm)

for earth wire.

- - 4 Nos.

17 Danger Plate - - 2 Nos.

18 Number Plate 1 No. 1 No. 1 No.

3.4 Tentative Bill of material for each Package is as per Schedule of Prices Vol-I.

3.5 Meteorological Data is as per Annexure-II.

4. Bolts , Nuts & Washers :

4.1 All Bolts and Nuts shall conform to IS:1363-1967 (amended to-date) or

equivalent to IES Standard. All Bolts and Nuts shall have Hexagonal head Nuts,

the heads being forged out of the solid steel rods and shall be truly pen centric and

square with the shank, which must be perfectly straight. Small Nuts & Bolts both

shall be fully threaded whereas long bolts shall be partially threaded.

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

date) or equivalent to IEC Standard.

5. Spares and Clearances:

5.1 Normal Span :

The normal running span of the line shall be approx. 60 Mtrs. For 11 KV Line in

the Cross Country.5.2 Wind Span :

The wind Span is the sum of two half spans adjacent to the support under

consideration. For normal horizontal spans this equals to normal running span.

5.3 Electrical Clearances:

5.3.1 Ground Clearances:

The minimum ground clearances from the bottom conductor shall not be less than

5.125 meter at the maximum sag conditions i.e. at maximum temperature and

still air.

Any LT/HT/Telecommunication line falling around of new 11 KV line should

have enough clearances as prescribed in I.E. rules applicable in this respect.

5.3.2 For river crossing, the minimum electrical clearance including ground clearance

will be the same as for normal poles.

5.4 Conductor and Earth Wire Configuration:


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The three phases shall be in triangular formation. The phase to phase spacing

shall not be less than 1.070 Mtr.

6. Drawings:

6.1 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/drawingsare 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.

6.2 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.

7. Excavation & Erection of Poles:

7.1 The Pits for the Poles are to be excavated in the direction of the line, as this will

facilitate the erection of pole and given internal stability. The depth of the

foundations to be excavated for the poles shall be approximately 1/6th

of the

Poles length. The alignment of the Poles are to be set right and the earth-filling

will be done after checking the alignment vertically and earth will be rammed

afterwards properly.

7.2 11 Poles are to be erected on almost 10th location when the line is going straight

and it is also to be provided wherever there is an angle of deviation in the line.

When the angle of deviation is 60C, 4 pole structure will be provided. In case

of angle H-Pole, the pits are to be excavated along the bi-section of the angle of

deviation. It will be ensured that the poles are held in vertical position and earth

is filled in the pits and proper ramming is done so that pole remains in proper

position. On every H-Pole, 4 stays are to be provided along the line i.e. 2 on each

direction and in addition two more stays along the bi-section of the angle of

deviation are to be provided as required depending upon the site conditions as per

the drawings attached with the specifications.

7.3 The stays will be provided at all dead end locations, angle locations and T-Off

points and also on normal locations as wind stays to counter the pressure of the

winds. Normally every fourth pole of the line shall be provided with two wind


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stays one on either side of the pole. The angle of the stays will be generally kept

on 30 to 45 degrees depending upon the tension and the location of the line.

Every stay shall be provided with 11 KV Disc Insulators as per drawing.

7.4 Earthing shall be provided on every 4th pole as per the design attached hereto in

addition to the continuous Earth Wire. H-pole structures will be provided with 2

No. earthings.7.5 Number plate shall be provided on each location indicating the No. of Structure

S1, S2 etc. 2 pole and 4 pole structures will be numbered both for structure Nos.

as well as H-Pole /4-pole marking. For example if Ist H-pole appear at Structure

No. 10, plate will be denoted as S-10/H-1. Similarly, if Ist 4-pole appear at

structure No. 25, the same will be denoted by S-25/4P-1 & so on.

7.6 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.

7.7 One set of 11 KV lightning arrestor shall be provided within 3 KM area. 11 KV

G.O. Switch shall be provided on the terminal structure near the grid S/Station &

at the interconnection point with existing feeder to facilitate the complete

isolation of the line.

8. Handling of Conductor and Earth Wire:

8.1 The Contractor shall be entirely responsible for any damage to the poles,

insulators and conductors during transportation & stringing. While running out

the conductors, care shall be taken that the conductors do not touch or rub against

the ground or objects, which could cause scratches or damages to the strands. The

conductors shall be run out of the drums from the top in order to avoid damage

due to chaffing.

8.2 The stringing blocks shall be suspended in a manner to suit the design of the X

arms. Proper T&P shall also be made available to the Employer by the Contractor

for checking the tensions in the guy wires. The drums shall be provided with a

suitable braking device to avoid damages, loose running out and kinking of the

conductor. The conductor shall be continuously observed for loose or broken

strands or any other damage. When approaching end of a drum length atleast

three coils shall be left when the stringing operations are to be stopped. These

coils are to be removed carefully and if another length is required to be run, a

joint shall be made as per the recommendations of the manufacturers.


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8.3 Repairs to Conductors if necessary shall be carried out during the running out

operations with repair sleeves. Repairing of Conductors surface shall be done

only in case of minor damage scuff marks etc. keeping in view both electrical and

mechanical safe requirements. The final conductors shall be cleaned smooth and

without any projections, sharp points cuts, abrasions.

8.4 Conductors Splices shall be made so that they do not crack or get damaged in thestringing operations. The Contractor shall use only such equipment/methods

during Conductor stringing which ensures complete compliance in this regard.

8.5 Derricks shall be used where roads, rivers, channels, telecommunications or

overhead power line, railway lines, fences or walls have to be crossed during

stringing operations. It shall be seen that normal services are not interrupted or

damage caused to property. Shut down shall be obtained when working at

crossing of overhead power lines as per para 8.8. Contractor shall be responsible

for proper handling of the Conductor. Earth wire and accessories in the field.

8.6 The sequence of stringing of Conductors/Earth wire shall be from top to

downwards i.e. conductors will be run out in succession & earth wire will be

strung in the last.

8.7 The proposed 11 KV power lines may run parallel for certain distance with the

existing power lines, which may remain energized during the stringing period. As

a result there is a possibility of dangerous voltage build up due to electromagnetic

and electrostatic coupling in the pulling wire, conductors and earth wires which

although comparatively small during normal operations can be severe during

switching. It shall be Contractors responsibility to take adequate safely

precautions to protect his employees and others from this potential danger.

8.8 The Contractor shall inform the Engineer whenever he wants to avail the Permit

to Work from the local sub-division for erecting the new 11 KV line or

augmenting the existing 11 KV line. A minimum 48 hours advance notice in

writing for availing the shutdown on any live 11 KV feeder/LT lines shall be

given to the Engineer. The 11 KV LT line on which permit is takenshould be

made clear from all the temporary earth, men and material before cancellation of

the Permit to Work. It is worth mentioning here that the Permit to Work on

existing line shall be arranged through the Engineer or his representative and the

same shall also be got cancelled through the same agency only./ No Permit to


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Work shall be issued on any line directly to Contractor or his staff from any 33

KV or 66 KV Sub-Station.

9. Stringing of Conductor & Earth Wire:

9.1 The stringing of conductor shall be done by standard stringing method.

9.1.1 After being pulled the Conductor/Earth wire shall not be allowed to hang in the

stringing blocks for more than 6 hours before being pulled to the specified sag.9.1.1.1Conductors creep in respect of ACSR 50 mm2/ 80mm2 Conductors are to be

compensated by over tensioning the conductor at a temperature of 21C or lower

during stringing.

9.1.2 The bidder shall give complete details of the stringing method, which he proposes

to follow. Before the commencement of stringing the Contractor shall submit the

stringing charts for the Conductor and Earth wire for various temperatures and

spans along with equivalent spans to the Engineer for the approval of the

Employer.

9.2 Sagging in Operation:

9.2.1 The Conductor shall be pulled up to the desired sag and left in running blocks for

atleast one hours after which the sag shall be re-checked and adjusted if necessary

before transferring the Conductor from the running blocks to the pin insulators.

The conductor shall be clamped within 36 hours of sagging.

9.2.2 The sag will be checked in the first and the last span of the section in case of

sections upto 8 spans and in one intermediate span also for sections with more

than eight Spans. The sag shall also be checked when the Conductor have been

drawn up and transferred from running clocks to the insulators.

9.2.3 The running blocks when suspended from the structures for sagging shall be so

adjusted that the Conductors on running blocks will be on the same height as a 11

KV Pin Insulators to which it is to be secured.

At sharp vertical angle, the sag and tensions shall be checked on both sides of the

angle, the conductor wire shall be checked from the running blocks for equality of

tension on both sides.

9.2.4 Tensioning and sagging operations shall be carried out in calm weather when

rapid changes in temperature are not likely to occur.

9.3 Tensioning and Sagging of Conductor and Earth Wire:

The Tensioning and Sagging Operations shall be done in accordance with the

approved stringing chart before the Conductor and Earth wire are finally attached


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to the poles through the earth wire clamps and insulators for the Conductor. The

relevant stringing charts for the Conductor and earth wire should be employed for

this purpose.

9.4 Final Checking, Testing and Commissioning:

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

carried out by the Contractor to ensure that all the foundation works, pole erectionand stringing has been done according to the specifications and as apaproved 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) The stringing of the Conductors and Earth Wire has been done as per the

approved sag and tension charts and desired clearances are clearly available.

d) All Conductors and Earth wire accessories are properly installed & fixed.

e) All other requirements to complete the work like fixing of danger plate, phase

plate, number plate, barbed wire etc. are properly installed.

f) The insulation of line as a whole is tested by the Contractor by providing his

own equipment, labour etc. to the satisfaction of the Employer.

g) The line is tested satisfactorily for commissioning purpose.

h) Earth resistance of every earth wire & P/M S/Stn. will be measured and result

shall be supplied and same will also be checked by the Engineer or his

representative.

10. General Technical Conditions :

10.1 The above provisions shall supplement all the detailed technical specifications

and requirements brought out herein. The Contractors proposal shall be based on

the use of materials complying fully with the requirements specified herein.

10.2 Engineering Data:

10.2.1 Thefurnishing of engineering data by the Contractor shall be in accordance with

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


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any of his responsibilities and liabilities for mistakes and deviations from the

requirements specified under these specifications.

10.2.2 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.10.2.3 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.

I) In case of availability of space, in the Control Room, for the

installation of only one 11 KV breaker panel & more than one feeder

are to be emanated from the concerned sub-station, the 11 KV breaker

panel incoming type shall be installed which shall cater to the

requirement of one or more than one outdoor type VCBs (kiosk). The

11 KV HT supply shall be extended through 11 KV underground

cable.

II) A- Back Filling of Pits :

a) All the locations, (with following exceptions), the pits after erection of

poles shall be back filled with excavated or borrowed earth in layers

taking care to ram the earth in one layer at a time to the satisfaction of

site-in-charge.

b) For all the failure containment structures, described earlier & repeated

below, the pits shall be hack filled with excavated / borrowed earth

and broken bricks (Jhama) back properly rammed to the satisfaction of

site-in-charge.

i) At some the tapping points & dead end poles

ii) At all the points where DT is to be installed.

iii) At all the points as per REC construction dwg. No. A-10 ( for

the diversion angle of 10-60 degree).

iv) At the distance of 1 km max. from the last Jhama filled pole

structure.

v) Both side poles at all the crossing for main road, nallaha

railway crossings etc.


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vi) Al DP structures.

Tapping points & roads where the failure containment

structures is to be erected shall be decided during detailed

engineering.

c) The cost of backfilling including all material /borrowed

earth/Jhama etc. is deemed to be included in the quoted price.The above clauses shall be read in conjunction with clause given

below:

B- Foundation & Pole Erection:

a) The foundation of poles shall be of the following types:-

i) Foundation back-filled and rammed with excavated soil and brick

batting for 200 Kg. PCC Poles.

ii) Foundation back-filled and rammed with excavated/borrowed soil.

b) The Type of foundation for individual poles shall be decided

during detailed engineering. The bidder shall quote their rates as

per the quantity of both types of foundations indicated in the BPS.

The pole erection rate shall include excavation in all types of

soil/rock, back-filling of the foundation pole as specified, cost of

all materials, labour etc.

c) Foundation back-filled and rammed with excavated soil and brick-

batting for 200 Kg, PSC poles - The foundation pit of the pole

should be of size 600 mm x 500 mm x depth. The base of the

foundation shall be either of PCC (1:2:4) of size 400 x 400 x 70

mm or a stone plate of size 400 x 400 x 35 mm duly back-filled as

explained in clause above.

d) Foundation back-filled and rammed with excavated / borrowed soil

and brick batting for 200 Kg. PSC Poles. The foundation pit of the

pole should be of size 600 mm x 400 x depth. The base of the

foundation shall be either of PCC (1:2:4) of size 400 x 400 x 70

mm or a stone plate of size 400 x 400 x 35 mm, duly back-filled

as explained in clause above.

e) It is envisaged that 11 KV line may be traversing marshy & low

laying area for which special type of foundation shall be required.


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In such a case, difference in excavation quantity, concreting &

reinforcement between special foundation and normal foundation

shall be part of the package.

f) Erection of Poles: The poles are to be erected in alignment with

utmost care. The poles shall then be lifted to the pit with the help

of wooden supports. The pole shall then be kept in the verticalposition with the help of 25 mm (min.) manila ropes which shall

act as the temporary anchor. The verticality of the pole shall be

checked by spirit level in both longitudinal & transverse directions.

Once, this is done, the back filling / concreting shall be done in the

pit. The temporary anchor shall be removed only when poles set

properly in the foundation.

C- Erection of Stay Sets:

The Contractor shall install the stay set complete in all respect. This

includes excavation of pit size 0.5 m x 0.5 m x 1.6 m in all kinds of soil

including laterite/hard rocks. Stay plate and rod (leaving the top 10 cm)

shall be embedded in the pit with PCC in the ratio 1:2:4 (the volume of

PCC shall be 0.5 m x 0.5 m x 0.8 m ). The rest (upper half) of the pit shall

be filled with excavated soil duly compacted layer by layer. An angle

between 30 to 45 degrees shall be maintained between stay wire and the

pole. The stay wire shall be used with a stay insulator at a height of 5 m

above ground level with G.I. turn buckle.

Stay set shall be grouted as per drawing No. PGCIL/RE/Stay-Set.

Cl 11.0:

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-B1. Drawings:

1.1 All drawings submitted by the Contractor including those submitted at the time ofBid shall be with sufficient detail to indicate the type, size, arrangement,

dimensions, material description, Bill of materials, weight of each component,

break-u[p for packing and transportation, fixing arrangement required, the

dimensions required for installation and any other information specificallyrequested in these specifications.

1.2 Each drawing submitted by the Contractor shall be clearly marked with the nameof the Employer, the specification title, the specification number and the name ofthe 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 route plan or other necessaryconstruction drawings for approval to the Employer within 20 days of Letter of

Intent.

1.4 The route plan drawings submitted by the Contractor shall be examined by theEmployer as far as practicable within 20 days and shall be modified by theContractor, 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 theContractor to rectify the drawings in good time shall not alter the contract

completion date.

1.5The drawings submitted for approval to the Employer shall be inquadruplicate. 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 berequired along with one reproducible in original of the drawings after

incorporating all corrections.

1.6The work shall be performed by the Contractor strictly in accordance withthese drawings and no deviation shall be permitted without the approval of the

Employer, if so required.1.7All manufacturing, fabrication and erection work under the Scope of

Contractor, prior to the approval of the drawings shall be at the Contractorsrisk. 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.1.8The 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 thesubject 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 implycompliance with all technical requirements, nor the absence of errors insuch documents.

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

a) Work Schedule (Master Network) Plan.b) Sag tensions calculation and sag template curve drawing.c) Pole spotting data.


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d) Detailed survey report and profile drawings showing groundclearance and pole locations.

e) Pole earthing trawing.f) Pole accessories drawings like danger plate, number plate, phase

plates etc.

g) 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, theparties 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 havebeen amended accordingly.

1.11 Design Co-ordination.The contractor shall be responsible for the selection and design ofappropriate 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 andassemblies shall be so done that it facilitates easy field assembly and

maintenance.

1.12 Design Review MeetingsThe contractor will be called upon to attend design review meetings withthe Employer and the consultants of the Employer during the period of

contract. The Contractor shall attend such meetings at his own cost atHisar or at mutually agreed venue as and when required. Such review

meeting shall be held as & when required.

2. Packing

2.1 All the material shall be suitably protected, coated, covered of boxed andcreated to prevent or deterioration during transit, handling & storage at sitetill the time of erection. The Contractor shall be responsible for any loss or

damage during transportation, handling and storage due to improper

packing.2.2 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.

2.3 All packing shall allow for easy removal and checking at site. Wherevernecessary, 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 reportdetailed 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


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4.1 The Contractor shall submit to the employer on the first day of everymonth a manpower deployment schedule for each activity.

4.2 The Contractor shall also submit to the employer on the first day of everymonth a manpower deployment report of the previous month detailingthe No. of persons scheduled to have been employed and actuallyemployed.

4.3 Tools, Tackle and Scaffolding

The Contractor shall provide all the construction equipment, tools,tackle and scaffoldings required for construction, erection andcommissioning of the power line covered under the contract. Heshall submit a list of all such material of the employer before thecommencement of work at site. These tools and tackle shall not beremoved from the site without the written permission of theEmployer.

4.4 First Aid and General Hygiene

The Contractor shall provide necessary first aid & reasonable

Hygiene facilities for all his employees, representatives andworkmen working at the site Enough number of Contractorspersonnel shall be trained in administering the first aid.

4.5 Security

The Contractor shall have total responsibility for all requirement andmaterials in his custody, stored, loose, semi-assembled and orerected by him at site. The Contractor shall make suitable securityarrangements including employment of security personnel toensure the protection of all materials, equipment and works from

theft, pilferage and any other damages and loss.

4.6 Materials Handling and Storage:

4.6.1 All the supplies under the Contract as well as arriving at Site shallbe promptly received, unloaded and transported and stored in thestores by the Contraction.

4.6.2 Contractor shall be responsible for examining all the shipment andnotify the employer immediately of any damage, shortage,discrepancy etc for the purpose of Employers information only. TheContactor shall submit to the Employer every week a report

detailing all the receipts during the week. However, the Contactorshall be solely responsible for any shortage or damages in transit,handling and/ or in storage and erection at Site.

4.6.3 The Contractor shall maintain an accurate and exhaustive recorddetailing out the list of all items received by him for the purpose oferection and keep such record open for the inspection of theEmployer.

4.6.4 Each package shall be legibly marked by the Contractor/ Supplierat his expenses showing the details such as description andquantity of contents, the name of the consignee and address, the


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gross and net weight of the package, the name of the Contractoretc.

5. Erection Conditions

5.1 The following shall supplement the conditions already contained inthe other parts of these specifications and documents and shallgovern that portion of the work on this Contract to be performed atsite.

5.2 Regulation of local Authorities and Statutes

5.2.1 The Contractor shall comply with all the rules and regulations oflocal authorities during the performance of his field activities. Heshall also comply with the Minimum Wages Act, 1948 and thepayment of Wages Act (both of the Govt. of India) and the rulesmade there under in respect of any employee or workmanemployed or engaged by him or his Sub-Contractor.

5.2.2 All registration and statutory inspection fees, if any, in respect of hiswork pursuant to this Contract shall be to the account of theContractor. However, any registration, statutory inspection fees

lawfully payable under the provisions of the statutory law and itsamendments from time to time during erection in respect of the 11KV line, ultimately to be owned by the Employer, shall be to theaccount of the Employer. Should any such inspection or registrationneed to be re-arranged due to the fault of the Contractor or his Sub-Contractor, the additional fees to such inspection and /orregistration shall be borne by the Contractor.

5.3 Contractors Field Operation.5.3.1 The Contractor shall keep the Employer informed in advance

regarding his field activity plans and schedules for carrying-outeach part of the works. Any review of such plan or schedule or

method of work by the Employer shall not relieve the Contractor ofany of his responsibilities towards the field activities. Such reviewsshall also not be considered as an assumption of any risk

by the Employer or any of his representatives and no claimof the Contractor will be entertained because of the failure orinefficiency of any such plan or schedule or method of workreviewed. The Contractor shall be solely responsible for the safety,adequacy and efficiency of tools and plants and his erectionmethods.

5.3.2 All the materials stored in the open or dusty location must becovered with suitable weather-proof and flameproof covering

material as applicable.5.3.3 The Contractor shall be responsible for making suitable indoor

storage facilities at various locations to store all items /materialswhich require indoor storage.

6. Construction Management

Time is the essence of the Contract and the Contractor shall beresponsible for performance of his works in accordance with thespecified construction schedule. If at any time, the Contractor is


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falling behind the schedule for reasons attributable to him, he shalltake necessary action to make good for such delays by increasinghis work force or by working overtime or otherwise to accelerate theprogress of the work and to comply with schedule and shallcommunicate such actions in writing to the Employer, satisfying thathis action will compensate for the delay. The Contractor shall notbe 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 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 Contractors 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 Workmens Compensation Insurance:


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This insurance shall protect the Contractor against all claims applicable

under the Workmens 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-Contractors employees, which

for any reason are not covered under the Workmens employees, which

for any reason are not covered under the workmens Compensation Act,1948. The liabilities shall not be less than:

Workmens Compensation As per statutory Provisions

Employees 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 Employers 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

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


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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 properlyprotect3ed 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.

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


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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 rulesand 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 in accordance with

manufacturers 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


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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 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 Contractors 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


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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 complled 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, plantand 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

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

Workmens Compensation Act. The compensation mentioned

above shall be in addition to the compensation payable to the

workmen/ employees under the relevant provisions of the

Workmens 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


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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.


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SECTION VII-C

Technical Specification of EquipmentsSr No Description No.

1 PCC Poles 11M (400 kg WL) CSC-XV/DH/UH/P&D/2009-2010

2 PCC Poles 9M (200 kg WL) CSC-VII/DH/UH/P&D/2009-2010

3 ACSR 80 mm2 HSD-S-658-ST-87

4 ACSR 50 mm2 CSC-X/DH/UH/P&D/2009-20105 Stay Wire 7/8 SWG(GSS) CSC-VI/DH/UH/P&D/2009-2010

6 GI wire(GSL 8 SWG) CSC-XVI/DH/UH/P&D/2009-2010

7 MS Nuts and Bolts HSD/S-364/ST-163

8 Porcelain insulators and insulators

fittings for 11 kV overhead power

lines

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

9 GO switch CSC-XXVIII/DH/UH/P&D/2009-2010

10 11 kV XLPE cable 185 mm2 CSC- 44 /DH/UH/P&D/2009-2010

11 Lightening Arrestor 9 kV

12 Barbed wire

13 11 kV VCB O/G outdoor type S-51/DD-121

14 11 kV VCB O/G indoor type (on 33

kV S/Stn)

S-76/DD-161

15 11 kV VCB O/G indoor type (on 132

kV S/Stn)

S-81/DD-116

16 11 kV XLPE Aerial Bunched Cable S-143/DD-177

17 Heat shrinkable termination kit for

11 kV Cables

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

18 Control cable

19 Heavy duty LA

20 Feeder meterCSC-45/DH/UH/P&D/2009-2010


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UTTAR & DAKSHIN HARYANA BIJLI VITRAN NIGAM

Specification No. CSC-XV/DH/UH/P&D/2009-10

TECHNICAL SPECIFICTION

FOR

PCC POLES (400 KG) W.L. (F.O.S.-2.5) 11 METER LONG.

Common Specifications

Committee

UHBVN & DHBVN

Page 34 of 291


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TECHNICAL SPECIFICATION FOR PCC POLES (F.O.S=2.5)11M LENGTH

1. SCOPE : This specification covers manufactures assembly testing at

manufacturer works of PCC poles with an over all length of 11.00 M and working

load of 400 kg at 0.6 M from the top (As per drawings attached) suitable for use

in over head 33 kV & 11 kV lines as per schedule of requirement.

2. APPLICABLE STANDARDS : Except when they conflict with specific

requirement in the specification , the poles shall comply with the relevant

provisions made in the following Indian standards specification with the latest

version there of .

a) IS : 1678-1978 Specification for priestessed concrete pole for overhead

power telecommunication lines

b) IS: 2905-1966 Methods of test for concrete pole for overhead power, traction

telecommunication lines.

c) IS: 7321-1974 code of practice for selection, handling and erection of

concrete poles for overhead power and telecommunication lines.

d) IS: 1343-1980 code of practice for pre-stressed concrete.

e) IS: 456-1978 code of practice for plain & reinforced concrete.

f) IS: 1785 (Latest edition) for H.T. steel wires for pre-stressed concrete.

3. CLIMATIC CONDITIONS: The PCC poles are required to be used under the

following site conditions :-

1. Max ambient temperature 50c

2. Min. ambient temperature -2.5 c

3. Max. relative humidity 100%

4. Min. relative humidity 26%

5. Average number of rainy days per annum. Nearly 120 days

6. Average number of dust storm days per annum. 900 mm

7. Isoceraunic level 45

8. Average number of dust storm days per annum. 35

9. Max. wind pressure 195 kg/m

10. Altitude above mean sea level less than 1000 meter

4. TERMINOLOGY: For the purpose of is standard, the following definitions shall

apply.


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4.1 AVERAGE PERMANENT LOAD: That fraction of the working load which

may be considered of long duration over a period of one year.

4.2 LOAD FACTOR: The ratio of ultimate transverse load to the transverse

load at first crack.

4.3 TRANSVERSE: The direction of the line bisecting the angle contained

by the conductor at the pole. In the case of straight run, this will be normal to therun of the line.

4.4 TRANSVERSE LOAD AT FIRST CRACK: For design, the transverse

load at first crack shall be taken as not less than the value of the working load.

4.5 WORKING LOAD: The maximum load in the transverse direction, that is

ever likely to occur, including the wind pressure on the pole. This load is assured

to act at a point 600 mm below the top with the butt end of the pole planted to the

required depth, as intended in the design.

4.6 ULTIMATE FAILURI: The conditions existing when the pole ceases

to sustain a load increment owing to either crush of concrete, or snapping of the

prestressing tendon or permanent stretching of the steel in any part of the pole.

4.7 ULTIMATE TRANSVERSE LOAD: The load at which failure occurs,

when it is applied at a point 600 mm below the top and perpendicular to the axis

of the pole alongwith the transverse direction with the butt end of the pole planted

to the required depth as appended in the design.

5. MATERIALS :

5.1 CEMENT: The cement used in the manufacture of pre-stressed concrete

poles shall be ordinary or rapid hardening Portland cement conforming to IS:

269-1976 (specifications of ordinary and low heat Portland cement) or IS-804 IE-

1978 (specifications for rapid hardening Portland cement).

5.2 AGGREGATES: Aggregates used for the manufacture of pre-stressed

concrete poles shall conform to IS: 383-1970 (Specification for coarse and fine

aggregates from natural sources for concrete). The nominal max. size of

aggregates shall in no case exceed 10 mm.

5.3 WATER: Water should be free from chlorides, sulphate other salts and

organic matter portable water shall be generally suitable.

5.4 ADMIXTURE: Admixtures should not contain calcium chloride or other

chlorides and salts which are likely to procorrosion of pre-stressing steel.


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5.5 PRE STRESSING STEEL : The pre-stressing steel wires, including those

used as untensioned wires, should conform to IS ;1985 (part-1)- 1966

(specification for plain hard drawn steel wire for pre-stressed concrete part-1 cold

drawn stress relieved wire), IS :1785 (part-II ) -1967 (specification for plain hard

drawn steel wire for prestressed concrete part-II as drawn wire), or IS :6003-1970

(specification for intended wire for prestressed concrete )or the latest versionthereof.

5.6 The concrete Mix. Shall be designed to the requirement laid down for

controlled concrete (also called design mix. Concrete) in IS :1343-1980(code of

practice for plain & reinforced concrete) subject to the following special

conditions :-

A) Minimum works cube strength at 28 days should be at least 400kg/cm2 .

B) The concrete strength at transfer should be at least 200kg/cm2 .

C) The mix. Should contain at least 380kg of cement per cubic meter or

concrete.

D) The Mix should contain as low a water content as is consistent with

adequate workability, if it become necessary to add water to increase the

workability. If it becomes necessary to add water to increase the

workability, the cement content also should be raised in such a way that

the original value of water cement ratio is maintained.

6. WELDING AND LAPPING OF STEEL: The high tensile steel wire shall be

continuous over the entire length and the tendon welding shall not be allowed in

any case. However, jointing or coupling be permitting provided the strength of the

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

7. MANUFACTURE

7.1 All prestressing wires and re-enforcements shall be accurately fixed as

shown in the drawings and maintained in position during manufacture. The

unmentioned re-informants, as indicated in the drawing, should be held in

position by use of stirrups which should go round all the wires.

7.2 All wires shall be accurately stretched with uniform prestress in each wire.

Each wire or group of wires shall be anchored positively during casting care shall

be taken to see that the anchorages do not yield before the concrete attains

necessary strength.


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7.3 COVERS ; The cover concrete measured from the outside of the

prestressing tendon shall be normally 22mm.

7.4 COMPACTING Concrete shall be compacted by spinning , vibrating

shocking or other suitable mechanical means. Hand compaction shall not be

permitted.

7.5 CURING :The concrete shall be covered with a layer of socking canvas,Hessian or similar absorbent material and kept constantly wet up to the time

when the strength or concrete at least equal to the minimum strength of concrete

at transfer of pros tress . Thereafter, the pole may be removed from the mould

and watered at intervals to prevent surface cracking of the unit, the interval

should depend on the atmospheric humidity temperature.

7.6 The prestressing wires shall be detensioned only when the concrete has

attained the specified strength all transfer (i.e. 200kg/cm2). The cubes cast for

the purpose of determining the strength at transfer should be cured, as for as

possible, under conditions similar to those under which the poles are cured. The

transfer stage shall be determined based on the daily tests carried out on

concrete cubes till the specified daily tests carried out on concrete cubes till the

concrete strength indicated above is reached. thereafter the test on concrete

shall be carried out as detailed in IS-1343-1980(code of practice for prestressed

concrete )The manufacturer shall supply, when required by the purchaser or his

representative , results of compressive test conducted in accordance with IS:456-

1978(code of practice for plain and re-inforced concrete) on concrete cubes

made from the concrete used for the poles . if the purchaser so desire

manufacturer shall supply cubes for test purposes &such cubes shall be tested in

accordance with IS :456-1978 (code of practice for plain & reinforced concrete).

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

shock or sudden load to the poles. The rate of detensioning may be controlled by

any suitable mean either mechanical (screw type) or hydraulic. The poles shall

not be detensioned or released by cutting the pre-stressing wires using flames or

bar coppers while the wires are still under tension.

8. EARTHING: Earthing shall be provided by having a length of 8 SWG GI wire

embedded in concrete during manufacture and the ends of the wires left

projecting from the pole to a length of 175mm at 250mm from top and 450mm

below ground level.


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The earth wire shall not be allowed to come in contact with the prestressing

wires.

9. HANDLING ; Separate eye hooks shall be provided for handling and transport

one each at a distance of 165cms from either end of pole and they should be on

the face that has the shorter dimension of the cross section.

10. TESTS :10.1 Transverse strength test :

10.1.1. Pole made from ordinary Portland cement shall be tested only on the

completion of 28 days and poles made form rapid hardening cement only on the

completion of 14 days after the date of manufacture.

10.1.2. The pole may be tested in either horizontal or vertical position. If tested

in horizontal position, provisions shall be made to compensate for the

overhanging weight of the pole for this purpose the over hanging portion of the

pole may be supported on a movable trolley or similar device.

10.1.3. The pole shall be rigidly supported at the butt and for a distance equal

to the agreed depth of planting i.e. 1.80 M.

10.1.4. Load shall be applied at a point 600mm from the toe of the pole and

shall be steadily and gradually increased to the design value of the transfer load

at first crack. The deformation at this load shall be measured.

A prestressed concrete pole shall be deemed not to have passed the test of

visible cracks appear at a stage prior to the application of the design transfer load

for the first crack.

The load shall then be reduced to zero and increased gradually to a load equal to

the first crack load plus 10%of the minimum ultimate transverse load, and held

up for 2 minutes. This procedure shall be repeated until the load reaches the

value of 80 percent of the minimum ultimate transverse load and thereafter

increased by 5 percent of the minimum ultimate transverse load until failure

occurs. Each time of the load is supplied it shall be held for 2 minutes. The load

applied to prestressed concrete pole at the point of failure shall be measured to

the nearest five kilograms . concrete pole shall be deemed not to have passed

the test if the observed ultimate transverse load is less than the design ultimate

transverse load.

10.2 MEASUREMENT OF COVER :-After completion of the transverse

strength test, the sample pole shall be taken and checked for cover . The cover


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of the pole shall be measured at 3 points, one within 1.8 meter from the butt end

of the pole , the second within 0.6meter from the top and the third at an

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

The mean value of the measured cover should not differ by more than the 1mm

from the specified cover. The individual values should not differ by more than

3mm from the specified value.If these requirements are not met the workmanship with reference to aligning of

the end plates and pre-stressing and assembly of moulds should be improved

and inspection at production stage tightened suitably.

11. INSPECTION : Inspection of material and supervision of tests in accordance with

the relevant Indian standards mentioned in clause-2 above and supporting

drawing and schedules and approved manufacture specification shall be carried

out by the purchaser or duly authorized representative. The material shall be

inspected and tested before dispatch by an authorized representative of the

Nigam in respect of quality . The manufacturer 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/drawings.

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

and independent Govt. agency where ever there is dispute regarding the quality

of material supplied.

12. MARKING ; The pole shall be clearly and indelibly marked with the following

particulars either during or after manufacture but before testing at a position so

as to be easily read after erection in position.

A) Month and year of manufacture

B) Transfer strength of pole in kg.

C) Maker s serial no. and mark

D) UHBVN/DHBVN PO No. & Dt.


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ANNEXURE - A

SCHUDULE OF GUARANTEED AND OTHER TECHNICAL PARTICULARS FOR 11METER PCC POLES.

Sr. No. Particulars Value

1. Overall length of pole (mtrs).2. Working load at 0.6 Mtr. From top(kg)

3. Factor of safety

4. Bottom depth cm)

5. Top depth(cm)

6. Breadth (cms.)

7. No. tensioned wires per pole(Nos.)

8. No. of untensioned wires per pole( Nos.)

9. Length of each untensioned wire

10. Concrete QTY(m3/pole)

11. Steel Qty (kg/pole).

12. Weight of complete pole (kg).


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UTTAR & DAKSHIN HARYANA BIJLI VITRAN NIGAM

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

TECHNICAL SPECIFICATION

FOR

PCC POLES (200KG) W.L. (F.O.S-2.5) 8/9 METER

LONG

IssueoftheMonth: JUNE-2009 Common Specifications

Page 42 of 291


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TECHNICAL SPECIFICATION FOR

PCC POLES (200KG) W.L. (F/O/S-2.5)

8/9 METER LONG.


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TECHNICAL SPECIFICATION FOR PCC POLES (F.O.S-2.5) 8M

AND 9M LENGTH

1. SCOPE:

This specification covers manufacture, assembly, testing and inspection

before dispatch at manufacturers works of PCC poles with an overall length

of 8 M and 9 M and working load of 200Kg at 0.6 M from the top suitable for

use in overhead LT & HT lines.

2. APPLICABLE STANDARDS:

Except when they conflict with requirement in this specification, the poles

shall comply with relevant provisions made in the following Indian Standards

Specification.

2.1. IS - 1678/1960/1978 Specification for prestressed concrete poles foroverhead power, traction and telecommunication lines.

2.2. IS - 2905/1966 Methods of test for concrete poles for over head power

and telecommunication lines.

2.3. IS 7321/1974 Code of practice for selection, handling and erection of

concrete poles for over head power and telecommunication lines.

3. CLIMATIC CONDITIONS:

The PCC poles are required to be used under the following site conditions

3.1. Max. Temp. 500C

3.2. Min. Temp. -2.50C

3.3. Max. relative humidity 100%

3.4.Average no. of rainy days 120 days

per annum.3.5. Min. relative humidity 26%

3.6.Average annual rainfall 900mm

3.7. Isoceraunic level 453.8. Max. wind pressure 195Kg./Mtr2

3.9.Average no. of dust storm 35

days per annum.3.10.Altitude above mean sea 1000Mtrs.

Level less than.


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4. TERMINOLOGY:

For the purpose of this standard the following definition shall apply.

4.1. AVERAGE PERMANENT LOAD;

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

over period of one year.

4.2. LOAD FACTOR:The ratio of ultimate transverse load to the transverse load at first crack.

4.3. TRANSVERSE:

The direction of the lines bisecting the angle contained by the conductor

at the pole. In the case of straight run this will be normal to the run of the

pole.

4.4. TRANSVERSE LOAD AT FIRST CRADK:

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

than the value of the working load.

4.5. WORKING LOAD:

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

including the wind pressure on the pole. This load is assumed to act at a

point 600 mm below the top with the butt end of the pole planted to the

required depth as intended in the design.

4.6. ULTIMATE FAILURE:

The conditions existing when the pole ceases to sustain a load increment

owing to either crushing of concrete, or snapping of the prestressing

tendon of permanent stretching of the steel in any part of the pole.

4.7. ULTIMATE TRANSVERSE LOAD:

The load at which failure occurs, when it is applied at a point 600 mm

below the top and perpendicular to the axis of the pole along with the

transverse direction with the butt end of the pole planted to the required

depth.

5. MATERIALS:

5.1. CEMENT:

The cement used in the manufacture of prestressed concrete poles shall

be ordinary or rapid hardening Portland cement conforming to IS:

269/1978 (specifications for ordinary and low heat Portland cement) or IS:

8041/1976/1978 (specifications for rapid hardening Portland cement).


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5.2. AGGREGATES:

Aggregates used for the manufacture of prestressed concrete shall

conform to IS: 383/1970 (specifications for coarse and fine aggregate

from natural sources for concrete). The nominal max. size of aggregate

shall in no case exceed 10mm.

5.3. WATER:

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

matter. Potable water will be generally suitable.

5.4. ADMIXTURES:

Admixtures should not contain calcium chloride or other chlorides and

salts which are likely to promote corrosion of prestressing steel.

5.5. PRESTRESSING STEEL:

The prestressing steel wires, including those used as untensioned wires,

should conform to IS: 1785/Part-1 /1966 (specification for plain hard

drawn steel wire for prestressed concrete part-1 cold drawn stress

relieved wires (IS: 1785/Part-II) 1967 (specification for plain hard drawn

steel wire for prestressed concrete Part-II As drawn wire) or IS:

6003/1970 (specification for indented wire for prestressed concrete).

5.6. CONCRETE MIX. :

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

controlled concrete (also called design mix concrete) in IS: 1343/1960

(code of practice for prestressed concrete) and IS: 456/1964 (code of

practice for plain and reinforced concrete) subject to the following special

conditions.

a. Min. works cube strength at 28 days should be at least 420 Kg./Sq.

cm.


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b. The concrete strength at transfer should be at least 210 Kg./Sq.

cm.

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

of concrete.

d. The mix should contain as low a water content as is consistent with

adequate workability if it becomes necessary to add water toincrease the workability, the cement content also should be raised

in such a way that the original value of water cement ratio is

maintained.

6. WELDING & LAPPING OF STEEL:

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

pole tendon. Welding shall not be allowed in any case, however, jointing or

coupling may be permitted provided the strength of the joints or coupling is

not less than the strength of each individual wire.

7. MANUFACTURE:

7.1.All prestressing wires and reinforcements shall be accurately fixed as

shown in the drawings and maintained in position during manufacture.

The untensioned re-inforcement as indicated in the drawing should be

held in position by the use of strips which should go around all the wires.

7.2.All wires shall be accurately stretched with uniform prestress in each wire.

Each wire or group of wires shall be anchored positively during casting.

Care shall be taken to see that the anchorages do not yield before the

concrete attains the necessary strength.

7.3. COVER:

The cover concrete measured from the outside of the prestessing tendon

shall be normally 20mm.

7.4. COMPACTING:

The concrete shall be compacted by spinning, vibrating shocking or other

suitable mechanical means. Hand compaction shall not be permitted.

7.5. CURING:

The concrete shall be covered with a layer of sacking, canvas, Hessian or

similar absorbent material and kept constantly wet up to the time when


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the strength of concrete is at least equal to the minimum strength of

concrete at transfer of prestress. Thereafter, the pole may be removed

from the mould and watered at intervals to prev