SECTION - IV GENERAL TECHNICAL SPECIFICATION (GTS) Re

SECTION - IV GENERAL TECHNICAL SPECIFICATION (GTS) Re

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

SECTION - IV

GENERAL TECHNICAL SPECIFICATION (GTS)

Re Tender of Tender Notification 05/2015-16

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

TECHNICAL SPECIFICATION FOR STRENGHENING

1) 33 KV AND 2) 11KV DISTRIBUTION LINES

1.0 NATURE OF WORK

The work covered by this Specification is for Strengthening of 33kV, 11 KV, distribution lines and making the said lines electrocution proof for elephants inside the elephant corridor as specified herein and in the attached Schedules

.

SCOPE OF WORK:-

SL

NO

1

2

5

6

7

3

4

Proposed Works to be taken up ( Elephant Corridor )GAJAPATI, Paralakhemundi

No of interposing poles

Spikes

No of

Cupping to be made

NAME OF FEEDER REMARKS

SCOPE OF WORK

Ramagiri Anarsing

Tappping point

Pimpudiguma to Luhakhunti

Thatraj colloney

Tarapada

Tarapada

Mangarajpur

Tappping oint

Sankarada

Candragiri

Gudisahi to

Luhakunti

Karanjasahi

R Udaygiri

TOTAL

25 50

34 68

17 34

25 50

9 18

9 18

28(33KV ) 56

147 294

25

R.UDYAGIRI FEEDER

34

R.UDYAGIRI FEEDER

17

R.UDYAGIRI FEEDER

25

R.UDYAGIRI FEEDER

9

R.UDYAGIRI FEEDER

9

11KV R.Udyagiri

28

33Kv R.Udyagiri

147

Project-III

1

2

3

4

5

6

7

8

Mohana

Adava

Birikote

Guluba

Birikote

Adava

Adava

Adava

Adava

Raipanka

Guluba

Dengiskhala

Bachipanka punjasargi

Brhamanagion

Damadua

TOTAL

30 60

40 80

19 38

15 30

20 40

8 16

51 102

30

40

19

15

20

8

51

20

11KV ADAVA

FEEDER

11KV ADAVA

FEEDER

11KV ADAVA

FEEDER

11KV ADAVA

FEEDER

11KV ADAVA

FEEDER

11KV ADAVA

FEEDER

11KV ADAVA

FEEDER

11KV ADAVA

FEEDER

203

Project-IV

ALL material supplied by

Southco

Except

Spike, concreting

20 40

203 406

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

1

2

3

4

1

2

3

4

5

6

7

8

9

1

2

Cheligada

Cheligada

Makapada

Purunadiha

Kusapali chaka

Makapada

Tapping point

Kusapali chaka

Luhapathar

Chelagada

Kanikipadar to Janisahi

Kulia sahi

to Nuasahi kanakata

Sialilati to

Raibada

Tapping point Dengaamba

Balisahi

Bhaliasahi to

Pithakera

Tapping point Harida bada

Tapping point Poipani

Tapping point Karipada

Khambari sahi Gurusahi

TOTAL

Khajuripada

Tabrada to

Atarsing to

Konmkrada

Badapada Nuagada

17 34

19 38

14 28

11 22

8 16

20 40

15 30

6 12

11 22

2 4

2 4

8

11

16

22

133 266

33 66

34 68

17

19

14

11

8

20

15

11KV CHILIGADA

FEEDER

11KV CHILIGADA

FEEDER

11KV CHILIGADA

FEEDER

11KV CHILIGADA

FEEDER

11KV CHILIGADA

FEEDER

11KV CHILIGADA

FEEDER

11KV CHILIGADA

FEEDER

11KV CHILIGADA

FEEDER

6

11

2

2

8

11KV CHILIGADA

FEEDER

11KV CHILIGADA

FEEDER

11KV CHILIGADA

FEEDER

11KV CHILIGADA

FEEDER

11

11KV Cheligada

133

33

34

11KV NUAGADA

FEEDER

11KV NUAGADA

FEEDER

3

Nuagada

P antrada to

Keradanga to

Palapur

24 48

4

1

2

3

4

5

6

Nuagada

Nuagada

Nuagada

Golly

Badapada

Badapada koinpur

Pachuda

TOTAL

Luhangara toPelar

Allising to

Luhakhunti

K Baradanga

Titising to

Barai

Ragada

Arselling

TOTAL

21 42

112 224

32 64

18 36

21 42

35 70

9 18

19 38

134 268

24

21

11KV NUAGADA

FEEDER

11KV NUAGADA

FEEDER

112

32

11KV NUAGADA

FEEDER

18

21

11KV NUAGADA

FEEDER

11KV NUAGADA

FEEDER

35

11KV TITISING

FEEDER

9

11KV Jeeranga

19

11KV Jeeranga

134

Project-V

Project-VI

Project-VII

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

1

2

4

R Udaygiri

Mohana

Mohana

Badapada

Adava

Candragiri

25(33KV ) 50

45(33KV ) 90

24(33KV ) 48

25

45

33KV NUAGADA

FEEDER

33KV B.GAON

FEEDER

24

33KV Mohona

5

TOTAL

94 188 94 0

Methodology:- The complete procedures for the execution of the project are explained herewith; i. Detailed survey of substation, line and preparation of SLD & BOQ.

ii. Complete manufacture details, including shop testing & supply of materials from the approved vendors (materials which are to be supplied by the bidder) on prior approval of the owner. i. Providing Engineering drawing, data, operational manual, etc wherever applicable for the Owner‟s approval; ii. Packing and transportation from the manufacturer‟s works to the site. iii. Receipt, storage, preservation and conservation of equipment at the site. iv. Pre-assembly, if any, erection testing and commissioning of all the equipment; v. . Reliability tests and performance and guarantee tests on completion of commissioning; vi. Loading, unloading and transportation as required. vii. Erection of equipment in Sub-station including civil works. viii. Erection of lines of specified voltage. ix. Erection of interposing PSC Poles in HT line. x. Fitting of spikes in the poles. xi. Couping of pole. xii. Fencing of S/S with Barbed wire. xiii. Conversion of Bare LT line to AB Cables. xiv. Construction of guarding under HT line. xv. Testing, Commissioning of substations and lines / installations xvi. Getting the substations & lines inspected by Electrical Inspector after completion of work. xvii. Transportation and transit insurance of all free issue materials to be supplied from owner‟s nearest stores to site and as well as all other required materials (under the scope of supply by bidder) from supplier‟s premises to work site,construction of new electrical /civil structures, etc. xviii. Dismantling of existing electrical structures and return of these dismantled items at the Owner‟s stores, safe custody of the items and return of unused Owner‟s supplied materials to the Owner‟s stores.

For details the Technical Specification specified in Section-IV may be referred.

2.0.1 SURVEY (detail & check, estimating of quantities & spotting of Poles) Walk over survey shall have to be carried out to ascertain the location wise nature of work to be executed.

Project-

VIII

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

2.0.2 GENERAL: The Right of way shall be resolved by the contractor and all expenses there of shall be borne by him. However, SOUTHCO Utility shall render all helps in co-ordination with law and order and forest department for solving the same.

2.0.3 Provisional quantities/numbers of different types of work have been estimated and indicated in the BOQ Schedule given. However final quantities for work shall be as determined by the successful bidder, on completion of the detail survey.

2.0.4 After completing the detailed survey, the contractor shall submit the final survey report for approval of the employer.

2.0.5 (a) Optimization of Pole Location

I. Pole Spotting The contractor shall spot the interposing poles in such a way so that proper ground clearance should be maintained and there shall be minimum s ag in a span.

II. Anti-climbing Devices (Spikes) The vendor shall provide and install anti-climbing device on all 33kv and 11 kV DP Structures, and at all poles as per CEA guide lines. This shall be done with modified spikes as specified.

III. Fittings Common to all Line Pin Insulator Binding: The contractor shall use AL. Binding wire for binding shall be as per REC Construction Standards No. C-5 or better thereof.

Guy/Stay wire Clamp: The contractor shall supply & install Guy/Stay wire Clamp as per REC

Construction Standard G-1 or better here of as specified.

IV. Stay/Guy Sets a)The Stay/Guys shall be used at the following pole locations; At all the tapping points & dead end poles At all the points where DT is to be installed At all the points as per REC construction dwg. No. A-10 (for the diversion angle of 10-60 degree) Both side poles at all the crossing for road, nallaha, railway crossings etc.

b) The arrangement and number of stay sets to be installed on different pole structures shall be as per REC Construction Standards no. A-23 to A-27, G-5 & G-8. However, this shall be decided finally during erection, as per the advice of Engineer.

c)The stay set to be installed complete in all respect and would broadly consist of following items: 7/10 SWG G.I. Stay wire for 33KV & 11 kV lines and 7/12 SWG for LT line as per REC

Specification No.46/1986Stay Insulator type A for LT line and type C for 11 kV line as per

REC Specification No. 21/1981, Turn Buckle. Anchor rod and plate (Hot Dipped galvanized).

Thimbles and Guy Grip Complete stay set shall be as per REC Construction Standards no. G-1.

The stay clamp is envisaged as GS structure along with other clamps brackets etc.

IX. Erection of stay sets The contractor shall install the stay set complete in all respect. This includes excavation of pit in all kinds of soil with PCC in the ratio 1:2:4 as specified which shall be placed in the bottom of the pit. 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

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

maintained between stay wire and the pole. The stay wire shall be used with a stay insulator at a height of 5 mts. above ground level with F.I. turn buckle.

X. Stringing and Installation of Line with Bare Conductors. General The scope of erection work shall include the cost of all Material, labour, tools and plants such as tension stringing equipment and all other incidental expenses in connection with erection and stringing work.

The Bidders shall indicate in the offer the sets of stringing equipment he would deploy exclusively for work under each District work. The stringing equipments shall be of sufficient capacity to string AAAC .

The Contractor shall be responsible for transportation to site of all the materials to be provided by the Contractor as well as proper storage, insurance etc. at his own cost, till such time the erected line is taken over by the owner.

Contractor shall set up required number of stores along the line and the exact location of such stores shall be discussed and agreed upon with the owner.

Insulator Fixing

Pin insulators shall be used on all poles while strain insulators shall be used on all angle & dead end poles. The special type Pin Insulators should be used for conductors more than 100 mm2. Damaged insulators and fittings, if any, shall not be used. Prior to fixing, all insulators shall be cleaned in a manner that shall not spoil, injure or scratch the surface of the insulator, but in no case shall any oil be used for this purpose. Torque wrench shall be used for fixing various line materials and components, such as suspension clamp for conductor, whenever recommended by the manufacturer of the same.

Running Out of the Conductors

The contractor shall be entirely responsible for any damage to the pole or conductors during stringing. The conductors shall be run out of the drums from the top in order to avoid damage to conductor A suitable braking device shall be provided to avoid damaging, loose running out and kinking of the conductors. Care shall be taken to ensure that the conductor does not touch and rub against the ground or objects, which could scratch or damage the strands.

The sequence of running out shall be from the top to down i.e. the top conductor shall be run out first, followed in succession by the side conductors. Unbalanced loads on poles shall be avoided as far as possible. Wherever applicable, inner phase off-line conductors shall be strung before the stringing of the outer phases is taken up.

When lines being erected run parallel to existing energized power lines, the

Contractor shall take adequate safety precautions to protect personnel from the potentially dangerous voltage build up due to electromagnetic and electrostatic coupling in the pulling wire, conductors and earth wire during stringing operations. The Contractor shall also take adequate safety precautions to protect personnel from potentially dangerous voltage build up due to distant electrical storms or any other reason.

Stringing of Conductor

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

Bidder shall submit complete details of the stringing method for owner‟s approval.

Conductors shall not be allowed to hang in the stringing blocks for more than 96 hours before being pulled to the specified sag. Derricks/ scaffoldings or other equivalent methods shall be

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

used to ensure that normal services are not interrupted and any property is not damaged during stringing operations for roads, telecommunication lines, power lines and railway lines.

However, shut-down shall be obtained when working at crossings of overhead power lines.

The contractor shall make specific request for the same to the owner.

Jointing

When approaching the end of a drum length at least three coils shall be left in place when the stringing operations are stopped. These coils are to be removed carefully, and if another length is required to be run out, a joint shall be made as per the recommendations of the accessories manufacturer. Conductor splices shall not crack or otherwise be susceptible to damage during stringing operation. The Contractor shall use only such equipment/methods during conductor stringing which ensures complete compliance in this regard.

All the joints on the conductor shall be of compression type, in accordance with the recommendations of the manufacturer, for which all necessary tools and equipment like compressors, dies etc., shall be arranged by the contractor. Each part of the joint shall be cleaned by wire brush till it is free of rust or dirt, etc. This shall be properly greased with anti- corrosive compound if recommended by the manufacturer, before the final compression is carried out with the compressors. All the joints or splices shall be made at least 30 meters away from the pole. No joints or splices shall be made in spans crossing over main roads, railway line and Small River spans. Not more than one joint per conductor per span shall be allowed. The compression type fittings shall be of the self centering type and care shall be taken to mark the conductors to indicate when the fitting is centered properly.

Tensioning and Sagging Operations:

The tensioning and sagging shall be done in accordance with the approved stringing charts or sag tables. The sag shall be checked in the first and the last section span for sections up to eight spans and in one additional intermediate span for sections with more than eight spans

Tensioning and sagging operations shall be carried out in clear weather when rapid changes in temperature are not likely to occur.

Clipping In

Clipping of the conductors into position shall be done in accordance with the manufacturer‟s recommendations. Jumpers at section and angle towers shall be formed to parabolic shape to ensure maximum clearance requirements. Pilot pin insulator shall be used, if found necessary, to restrict jumper swing & to ensure proper clearance to design values. Fasteners in all fittings and accessories shall be secured in position. The security clip shall be properly opened and sprung into position.

Replacement:

If any replacements are to be effected after stringing and tensioning or during maintenance e.g. replacement of cross arms, the conductor shall be suitably tied to the pole at tension points.

All poles are used strictly according to final approved drawing and are free of any defect or damage whatsoever. 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. All conductor and messenger wire accessories are properly installed. All other requirements for completion of works such as fixing of danger plate and anti-climbing device have been fulfilled. The insulation of the line as a whole is tested by the Contractor through provision of his own equipment, labour etc., to the satisfaction of the owner. Proper earthing of the poles.

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

HT/LT/Road Crossing Guarding The contractor shall provide & install “cradle type” protective guarding for both 33 and 11 kV line, The guarding shall be provided at all the crossing i.e. road, telecommunication & power lines, railway line, nallaha etc. The contractor is required to follow local statutory regulations stipulated in Electricity (Supply) Act 1948,

Indian Electricity Rules 1956 as amended and other local rules and regulations referred in these specifications.

Reference Standards The codes and/or standards referred to in the specifications shall govern, in all cases wherever such references are made. In case of a conflict between such codes and/or standards and the specifications, latter shall govern. Such codes and/or standards, referred to shall mean the latest revisions, amendments/changes adopted and published by the relevant agencies unless otherwise indicated. Other internationally accepted standards which ensure equal or better performance than those specified shall also be accepted, subject to prior approval by the owner. In case no reference is given for any item in these specifications, latest REC specification & Construction Standards shall be referred to.

2.0.6 SPAN 1. The span should be as near as possible to the basic design span so that the minimum ground clearance should not less than 7.0 mts in cross country at maximum sag condition.(The span length should be applicable for both 33KV& 11 KV lines.)

2.0.7 WAY-LEAVE AND TREE CUTTING

Way-leave permission which may be required by the contractor shall be arranged at his cost. While submitting final-survey report for approval, proposals for way-leave right of way shall be submitted by the contractor. Employer may extend help to get the permission within a reasonable time as mutually agreed upon for which due notice shall be given by the contractor in such a way so that obtaining permission from appropriate authority do not hinder the continued and smooth progress of the work.

The employer shall not be held responsible for any claim on account of damage done by the contractor or his personnel to trees, crops and other properties.

The contractor shall take necessary precaution to avoid damage to any ripe and partially grown crops and in the case of unavoidable damage, the employer shall be informed and necessary compensation shall be paid by the contractor.

All the documents required for application to the statutory authorities must be prepared by the contractor & submitted to the employer for submission of the application towards approval of

Railway Crossing etc. However, the responsibilities lie with the contractor to get the clearance. Trimming of tree branches or cutting of a few trees en-route during survey is within the scope of survey to be done by the contractor. Contractor shall arrange for necessary way-leave and compensation in this regard. During erection of the line, compensation for tree cutting, damage caused to crops, actual cutting and falling of the trees including way-leave permission for such route clearance shall be arranged by the contractor at his cost. The contractor will identify the number of trees and detail of obstructions to be removed for erection of the line and intimate the employer well in advance in case of any help. Other related works like construction of temporary approach roads, etc. as required, shall be done by the contractor and the same will lie within the scope of contractor‟s work and such cost shall be considered to be included in the rates quoted by him.

2.0.8 PSC POLES In case of 33kv, 11KV and LT lines the conventional PSC poles may be used. . The materials must conform to IS: 800. All the test on materials and fabrication etc will be as per the relevant Indian standards.

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

1.0 ERECTION WORK When the survey is approved, the contractor shall submit to the employer a complete detail schedule of all materials to be used in the line. Size and length of conductor etc. are also to be given in the list. This schedule is very essential for finalizing the quantities of all line materials. The contractor shall furnish the same.

4.1 SCHEDULE OF ERECTION PROGRAMME After due approval of the detailed and check survey, the contractor shall submit to the employer a complete detailed schedule of erection programme with a Bar-Chart for construction of the lines indicating there in the target date of completion.

5.0 CONSTRUCTION OF FOUNDATION FOR PSC POLES

5.0.1 ERECTION OF POLE, CONCRETING OF POLES AND COMPACTION OF

SOIL Drawing for the excavation of pits, Foundation of both wet and Black cotton soil is enclosed which are to be adopted. If better design with less volume approved or tested by any other distribution agencies will also be acceptable.

5.0.2 Following arrangement shall be adopted for proper erection of poles wherever necessary and properly compacting of the soil around the base / foot of the poles, under this package. (a) Excavation has to done as per the drawing to the required depth and size. After final excavation the pit should be dressed properly so that uneven portion and loose soil should be removed before PCC (M-7.5) i.e 1:4:8 of thickness 75 mm is laid. The base footing of the pole concreting RCC (M-12.5) i.e 1:3:6 has to be done by proper alignment and verticality. (b) The verticality and leveling of pole/structure should be done by the help of plum bob or with theodolite and leveling instrument.

(c) In case of PSC pole RCC Pre –cast slab of size (450 x 4 50 x 75) mm has to be provided over the Lean concrete.

5.0.3 CEMENT CONCRETE AND BACK FILLING etc.

A) Materials All materials whether to be consumed in the work or used temporarily shall conform to relevant IS specification, unless stated otherwise, and shall be of the best approved quality.

B) Cement Cement to be used in the work under the contract shall generally conform to

IS:269/455-1989. Cement bags shall be stored by the contractor in a water tight well ventilated store sheds on raised wooden platform (raised at least 150 mm above ground level) in such a manner as to preventdeterioration due to moisture or intrusion of foreign matter.

Cements to be used within three months from the date of manufacture. Sub-standard or partly set cement shall not be used and shall be removed from the site by the contractor at his cost.

C) Coarse Aggregates i.e Stone chips or stone ballast. For M15 concrete (mix 1:2:4) the aggregate will be in the ranges from 12mm to 20mm.size and for M7.5 concrete (mix 1:4:8) these will be from 25mm to 40mm size.

D) Pole erection

1. After proper alignment, checking of verticality and leveling, the pole or structure should be properly tied before placing of base concrete of required height. Again the verticality and leveling should be checked.

2. The PCC pedestal concrete (M-12.5) is to be done by providing good quality of shutters, so that there will no leakage of cement slurry during concreting. The cooping height should be 450 mm above the existing ground level . The top portion of the cooping should be made tapered.

3. The back filling of locations should be done by using the excavated soil only in layers

(each layer should not be more than 500 mm) by putting water and ramming by using wooden rammers. In no case stone of size more than 75mm used for back filling. Back-filling has to be done 75mm above ground level or as specified.6

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

. 5.0.4 All the persons working on p o l e s shall wear safety helmet, safety belt and safety shoes, Similarly all the persons working on ground shall wear safety helmet and safety shoes.

5.0.4.1. If there is any LT/HT power line near the vicinity of erection, necessary shutdown of the power line shall be obtained in writing from the concerned Agency in order to avoid electrical hazards caused by accidental touching of stay/Guy ropes with power line.

5.0.4.2 Safety precaution Safety shall be given utmost importance during stringing. The following need to be ensured.

5.0.4.3 Safe working conditions shall be provided at the stringing site.

5.0.4.4 Full proof communication through walky- talkie / mobile phones shall be used in order to avoid any damage to workmen or public on ground.

(A) PSC POLE ( 9 MTR. X 300 KG)

I.

TECHNICAL SPECIFICATIONS

Applicable Standard:

The Poles shall comply with latest standards as under:

REC Specification No. 15/1979, REC Specification No. 24/1983, IS 1678, IS 2905, IS 7321.

II. Materials :

Cement

Cement to be used in the manufacture of pre-stressed concrete poles shall be ordinary for rapid hardening Portland cement confirming to IS: 269-1976 (Specification for ordinary and low heat Portland cement) or IS: 8041 E-1978 (Specification for rapid hardening Portland cement).

Aggregates

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

383 (Specification for coarse and fine aggregates from natural sources for concrete) .The nominal maximum sizes of aggregates shall in no case exceed 12 mm.

Water

Water should be free from chlorides, sulphates, other salts and organic matter. Potable water will be generally suitable.

Admixture

Admixture should not contain Calcium Chloride or other chlorides and salts which are likely to promote corrosion of pre-stressing steel. The admixture shall conform to IS: 9103.

Pres-Stressing Steel

Pre-stressing steel wires including those used as un tensioned wires should conform to

IS:1785 (Part-I) (Specification for plain hard-drawn steel wire for pre-stressed concrete, Part-I cold drawn stress relieved wire).IS:1785 (Part-II)(Specification for plain hard-drawn steel wire) or IS:6003 (Specification for indented wire for pre-stressed concrete).The type design given in the annexure are for plain wires of 4 mm diameter with a guaranteed ultimate strength of 160 kg/mm². All pre-stressing steel shall be free from splits, harmful scratches, surface flaw, rough, aged and imperfect edges and other defects likely to impair its use in prestressed concrete.

Concrete Mix

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

Concrete mix shall be designed to the requirements laid down for controlled concrete (also called design mix concrete) in IS: 1343-1980 (Code of practice for pre-stressed concrete) and

IS: 456 – 1978 (Code of practice for plain and reinforced concrete) subject to the following special conditions:

Minimum works cube strength at 28 days should be at least 420 Kg/cm².

The concrete strength at transfer should be at least 210 Kg/cm².

The mix should contain at least 380 Kg of cement per cubic meter of concrete.

The mix should contain as low water content as is consistent with adequate workability. 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.

III. Design Requirements

The poles shall be designed for the following requirements:

The poles shall be planted directly in the ground with a planting depth as per IS: 1678.

Wherever, planting depth is required to be increased beyond the specified limits or alternative arrangements are required to be made on account of ground conditions e.g. water logging etc., the same shall be in the scope of the bidder at no extra cost to owner. The bidder shall furnish necessary design calculations/details of alternative arrangements in this regard.

The working load on the poles should correspond to those that are likely to come on the pole during their service life.

The factor of safety for all poles above 9.0Mts. Shall not be less than 2.0.

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

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

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

At the design value of first crack load, the modulus of rupture shall not exceed 53.0kg/cm² for

M-40.

The ultimate moment capacity in the longitudinal direction should be at least one fourth of that in the transverse direction.

The maximum compressive stress in concrete at the time of transfer of pre-stress should not exceed 0.8 times the cube strength.

The concrete strength at transfer shall not be less than half, the 28 days strength ensured in the design, i.e. 420x0.5=210kg/cm². For model check calculations on the design of poles, referred to in the annexure, a reference may be made to the REC “Manual on Manufacturing of solid

PCC poles, Part-I-Design Aspects”.

IV. Dimensions and Reinforcements

The cross-sectional dimensions and the details of pre-stressing wires should conform to the particulars given in the enclosed drawing. The provisions of holes for fixing cross-arms and other fixtures should conform to the REC specification No.15/1979.

All pre-stressing wires and reinforcements shall be accurately fixed as shown in drawings and maintained in position during manufacture. The un-tensioned reinforcement as indicated in the drawings should be held in position by the use of stirrups which should go round all the wires.

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

All wires shall be accurately stretched with uniform pre-stressed in each wire. Each wire or group of wires shall be anchored positively during casing. Care should be taken to see that the anchorages do not yield before the concrete attains the necessary strength.

V. Cover

The cover of concrete measured from the outside of pre-stressing tendon shall be normally 20 mm.

VI. Welding and Lapping of Steel

The high tensile steel wire shall be continuous over the entire length of the tendon. Welding shall not be allowed in any case. However, joining or coupling may be permitted provided the strength of the joint or coupling is not less than the strength of each individual wire.

VII. Compacting

Concrete shall be compacted by spinning, vibrating, shocking or other suitable mechanical means. Hand compacting shall not be permitted.

VIII. Curing

The concrete shall be covered with a layer of sacking, canvass, Hessian or similar absorbent material and kept constantly wet up to the time when the strength of concrete is at least equal to the minimum strength of concrete at transfer of pre-stress. Thereafter, the pole may be removed from the mould and watered at intervals to prevent surface cracking of the unit the interval should depend on the atmospheric humidity and temperature. The pre-stressing wires shall be de-tensioned only after the concrete has attained the specified strength at transfer (i.e. 200 or 210 kg/cm² as applicable).The cubes cast for the purpose of determining the strength at transfer should be coursed, a sear as possible, under condition similar to those under which the poles are cured. The transfer stage shall be determined based on the daily tests carried out on concrete cubes till the specified strength indicated above is reached.

Thereafter the test on concrete shall be carried out as detailed in IS: 1343(code of practice for pre-stressed concrete). The manufacture shall supply, when required by the owner or his representative, result of compressive test conducted in accordance with IS: 456

(Code of practice for plain and reinforced concrete) on concrete cubes made from the concrete used for the poles. If the manufacture so desired, the manufacture shall supply cubes for test purpose and such cubes shall be tested in accordance with IS: 456 (Code of practice for plain and reinforced concrete).

IX. Lifting Eye-Hooks or Holes

Separate eye-hooks or hoes shall be provided for handling the transport, one each at a distance of 0.15 times the overall length, from either end of the pole. Eye-hooks, if provided, should be properly anchored and should be on the face that has the shorter dimension of the cross-section. Holes, if provided for lifting purpose, should be perpendicular to the broad face

X.

of the pole.

Holes for Cross Arms etc

Sufficient number of holes shall be provided in the poles for attachment of cross arms and other equipments.

XI. Stacking & Transportation

Stacking should be done in such a manner that the broad side of the pole is vertical. Each tier in the stack should be supported on timber sleeper located as 0.15 times the overall length, measured from the end. The timber supported in the stack should be aligned in vertical line.

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

XII. Earthing

(a) Earthing shall be provided by having length of 6 SWG GI wire embedded in Concrete during manufacture and the ends of the wires left projecting from the pole to a length of

100mm at 250 mm from top and 1000 mm below ground level.

(b) Earth wire shall not be allowed to come in contract with the pre-stressing wires

PSC POLE (9 MTR X 300 KG,) GUARANTEED TECHNICAL PARTICULARS

(To be submitted along with offer)

Sl

No.

Description

1

Type of pole

2

Factor of Safety

3

Overall Length of

Pole Meters

4

Working Load Kg

5

Overall Dimensions

Unit

meters

Kg mm

9 Mtr X300 Kg

Bidder‟s Offer

A

Bottom Depth

B

Top Depth

C

Breadth

6

Reinforcement

Detail:

7

Diameter of prestressing wire

8

No. of Tensioned wires

9

No. of Untensioned wire

10

Length of each untensioned wire

11 Concrete Detail

A

B

Cement Type

Grade

C Type

D

Quantity

Cubic meter/pole

E Standard confirming to:

12 Steel Quality

A Ultimate Tensile

Strength (UTS)

Kg/Pole

Km/Cm²

B Weight

5.0.5.1 All the poles shall be provided with a RCC block base or MS base plate having

dimensions as mentioned at 5.0.2 © as per the site requirement to be decided by

Engineer in Charge. The decision of Engineer in Charge will be Final.

5.0.5.2 The poles shall then be lifted to the pit with the help of wooden supports. The pole shall then be kept in the vertical position with the help of 25 mm (min.) manila ropes, which will act as the temporary anchor. The verticality of the pole shall be checked by spirit level in both longitudinal & transverse directions. The temporary anchor shall be removed only when poles

set properly in the pit for foundation concreting & backfilling with proper compacting the soil. The backfilling should be done inlayers (maxm. 0.5 mts at a time with

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA sprinkling of water and by using wooden hammer. No stone more than 75 mm should be used during back filling.

5.0.5.3 Suspension type H/W fittings in all tangent locations and Four pair bolted type tension H/W fittings should be used in all new 33&11 Kv lines.45 KN & 70 KN normal B&S insulators will be used in suspension & tension locations respectively.

5.0.5.4 Concreting of foundation up to a minimum height of 1.8 mtrs from the bottom of the pit with a circular cross-section of radius 0.25 mtrs. (volume of 0.3 cu.mtr. per pole) in the ratio of i)

ii)

1:2:4 shall be done at the following locations: The depth has to be increased to 2mtr or as required at site condition if poles more than 11 Mts. are to be used.

At all the tapping points and dead end poles.

At all the points as per REC construction dwg. No. A-10 (for the diversion angle of 10-60 degree) or better there of as per the instruction of Engineer in charge. The decision of

Engineer in charge will be final.

iii) Both side poles at all the crossing for road, Nallaha railway crossings etc. iv) Where Rail poles, Joist poles, double pole and four pole structures are to be erected.

6.0.

Earthing of Support

6.0.1 Each pole shall be earthed with coil type earthing as per REC Construction Standard J-1.

6.0.2 All DP & Four pole structures & the poles on both sides of railway crossing shall be earthed by providing two nos. pipe earthing as per Drawing provided by SOUTHCO UTILITY.

6.0.3 Each tower/structures should be earthed by providing 2.5 mts.50x6 GI flat and 40 x 3000 mm heavy gauge ISI mark earthing pipe. The top of the earthing pipe should remain 600 mm below ground level. All railway X-ing locations two nos. earthing should be provided.

In case the required footing resistance is not achieved on measurement, counterpoise earthing has to be provided as per the standard.

ALUMINIUM BINDING WIRE

TECHNICAL SPECIFICATION

SCOPE:

Scope covers manufacture, testing and supply of 3.53 mm dia Aluminium Binding

Wire as per IS 398.

MATERIALS:

The material comprising the wire shall have the following chemical composition:

Aluminium 99.5% minimum Copper, silicon and iron 0.5% maximum

The surface of the wire shall be smooth and free from all irregularities and imperfections. Its cross sections shall closely approximate that of true circle.

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

Characteristics of Aluminium Binding wire

Diameter of wire

Cross sectional area of nominal dia.

Wires

(mm)

Minimum Nominal Maximum

3.15 3.53 3.55 9.787

Weight of wire kg/km

Breaking

Load

(kN)

26.45 1.57

Inspection and Tests

The following routine checks and tests shall be carried out on 10% of the coils of aluminium binding wire. If anyone sample fails to pass any one of the test nominated for that wire, then samples shall be taken from every coil in the consignment and any coil from which a sample proves defective shall be rejected. On no account shall any rejected material be presented for test again unless with the written approval of, and under conditions determined by the Purchaser.

Physical properties

The surface of the finished wires shall be checked to ensure that it is smooth , free from all irregularities, imperfections and inclusions and that its cross section approximates closely that of true circle.

The wire shall be checked to ensure that its diameter and weight are within the values given I the table above characteristic of a aluminium binding wire.

Ultimate tensile strength

When tested on a standard tensile testing machine, the value obtained for the ultimate tensile stress shall not be less than 1.57kN

Wrapping test

The wire shall withstand one cycle of a wrapping test as follows:

The wire shall be closely wrapped round a wire of its own diameter form a close helix of eight turns. Six turns shall then be unwrapped and again closely rewrapped in the same direction as the first wrapping. The wire shall not break or crack when subjected to this test.

Packing & Delivery

The aluminium binding wire shall be delivered in 30m coils, with a permitted tolerance of +5%.Random or non standard lengths shall not be permitted.

Each coil shall be adequately guarded against damage due to transportation and handling and shall have an outer layer of tightly wound polythene tape or be contained in a suitable, transparent plastic bag.

The internal diameter of the wound coil shall not be such as to result in a permanent set in the conductor.

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

(I)

The coils shall be contained in non returnable wooden cases, with a gross weight not in excess of 300 kg. The number of coils contained shall be marked on the outside of each case.

ALUMINIUM BINDING WIRE

GUARANTEED TECHNICAL PARTICULARFS

Item

No.

Description

1

Manufacturer Address

2

Indian Standard No. IS 398 (Part-4) 1994

Bidder‟s Offer

3

4

Material of Binding Wire

Dia. Of Wire

5

Maximum D.C. resistance at 20 degree centigrade

6

Indivisual Aluminium Alloy Strands

a)

Tensile breaking stress

b)

Elongation on 200 mm length in breaking

7

Particulars of Raw Materials

7.1

Aluminium

a) Minimum Purity of aluminium

7.2

Aluminium Alloy

a) Aluminium redraw rod conforming to

Elements

(a) Si

(b) Cu

( c) Other Element (If any)

8

Linear mass of Wire

9

Modulus of Elasticity

10

Coefficent of Linear Expansion (per deg. Cent.)

33 KV, 11 KV “V” CROSS ARM, BACK CLAMP FOR “V” CROSS ARM & POLE

TOP BRACKET (F CLAMP)

TECHNICAL SPECIFICATIONS

8.0

CROSS ARMS

Cross Arms should be made by using 100x50x6 mm MS channel for both 33 KV &11

KV systems. In tower type poles (GI) all the X-arms are part of the structure.

8.0.1 MATERIALS:-

a) MS Cross arms and Pole Top Brackets for both 33 KV &11kV construction at intermediate and light angle pole shall be fabricated from grade 43A mild steel of channel section and for heavy angle poles, end poles and section poles fabricated from grade 43A mild steel of angle section. The grades of structural steel shall conform to

IS – 226: 1975.

b) The 33 KV & 11 KV „ V ‟ Cross arm shall be made out of 100x 50x5.6. mm MS

Channel of ( 9.56 kg/mtr weight) .

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

The Back Clamp for both 33 KV & 11 KV shall be made out of 75 x 10 MS Flat and shall be suitably designed to fit PSC Pole 9 Mtr x 300 Kg , 8 Mtr x 200 Kg.and 9 mtrx415kg

c)The Pole Top Bracket (F Clamp) shall be made out of75 x 10 MS Flat suitably designed to fit PSC Pole 9 Mtr x 300 Kg ,10X Mtr x 425 Kg.& 9mtrx415 kg for both

33 KV & 11 KV.

Except where otherwise indicated all dimensions are subject to the following tolerances:

Dimensions up to and including 50mm: +1mm: and dimensions greater than 50mm:

+2%

All steel members and other parts of fabricated material as delivered shall be free of warps, local deformation, unauthorized splices, or unauthorized bends. Bending of flat strap shall be carried out cold. Straightening shall be carried out by pressure and not by hammering.

Straightness is of particular importance if the alignment of bolt holes along a member is referred to its edges.

Holes and other provisions for field assembly shall be properly marked and cross referenced. Where required, either by notations on the drawing or by the necessity of proper identification and fittings for field assembly, the connection shall be match marked. A tolerance of not more than 1mm shall be permitted in the distance between the center lines of bolt holes.

The holes may be either drilled or punched and, unless otherwise stated, shall be not more than 2mm greater in diameter than the bolts. When assembling the components force may be used to bring the bolt holes together (provided neither members nor holes are thereby distorted) but all force must be removed before the bolt is inserted.

Otherwise strain shall be deemed to be present and the structure may be rejected even though it may be, in all other respects, in conformity with the specification.

The back of the inner angle irons of lap joints shall be chamfered and the ends of the members cut where necessary and such other measures taken as will ensure that all members can be bolted together without strain or distortion. Similar parts shall be interchangeable.

Shapes and plates shall be fabricated and assembled in the shop to the greatest extent practicable. Shearing flame cutting and chipping shall be done carefully, neatly and accurately. Holes shall be cut, drilled or punched at right angles to the surface and shall not be made or enlarged by burning. Holes shall be clean-cut without torn or ragged edges, and burrs resulting from drilling or reaming operations shall be removed with the proper tool.

Shapes and plates shall be fabricated to the tolerance that will permit field erection within tolerance, except as otherwise specified. All fabrication shall be carried out in a neat and workmanlike manner so as to facilitate cleaning, painting and inspection and to avoid areas in which water and other matter can lodge.

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

Contact surfaces at all connections shall be free of loose scale, dirt, burrs, oil and other foreign materials that might prevent solid seating of the parts.

8.0.2 Fabrication has to be made as per drg. of „ V „ X-arm, Back clamp & „ F „ clamp.

8.0.3 33 KV & 11 KV V CROSS ARM

GURANTEED TECHNICAL PARTICULARS

(To be submitted along with offer)

Sl.

No.

Description Unit

1

Type of crossarm

2

Grade of steel

3

Steel standard

4

Fabrication Standard

5

Dimensions

6

Steel section utilized

7

Steel tensile strength

8

Working load

9

Weight of cross arm

10

Whether drawing has been submitted with the bid

8.0.4

Mm

N/cm²

Kg kg

Bidder‟s offer

33 Kv

POLE TOP BRACKETS (F CLAMP)

11 Kv

GURANTEED TECHNICAL PARTICULARS

(To be submitted along with offer)

Sl.

No.

1

2

3

Description Unit

Type of crossarm

Grade of steel

Steel standard

4

Fabrication Standard

5

Dimensions

6

Steel section utilized

7

Steel tensile strength

8

Working load

9

Weight of cross arm

10

Whether drawing has been submitted with the bid

Mm

Bidder‟s offer

33 Kv 11 Kv

N/cm²

Kg kg

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

8.0.5 BACK CLAMP FOR “V” CROSS ARM

GURANTEED TECHNICAL PARTICULARS

Sl.

No.

(To be submitted along with offer)

Description Unit

1

Type of Clamp

2

Grade of steel

3

Steel standard

4

Fabrication Standard

5

Dimensions

6

Steel section utilized

Mm

Bidder‟s offer

33 Kv 11 Kv

7

Steel tensile strength

8

Working load

9

Weight of back clamp

10

Whether drawing has been submitted with the bid

8.0.6 Fixing of Cross Arms

N/cm²

Kg kg

After the erection of supports and providing guys, the cross-arms are to be mounted on the support with necessary clamps, bolts and nuts. The practice of fixing the cross arms before the pole erection should be followed.

9.0

INSTALLATION OF LINE MATERIALS

9.0.1 Insulator and Bindings - These materials are to be procured from the approved vendors only after design approval of SOUTHCO UTILITY

1. Suspension type H/W fittings (Single suspension normally to be used and in important

X-ings double suspension fittings to be used) in all tangent locations. In S/S fittings 3 nos. 45 KN normal disc insulators, D/S fittings 6 nos. 45 KN normal disc insulators to

be used in 33 KV line. In case of 11 KV line 2 nos & 4 nos 45 KN B&S normal insulators are to be used.

2. In angle locations single tension fittings to be used with 4 nos. 70 KN disc insulators.

In all road X-ings and other important X-ings Double Tension H/W fittings 8 nos. 70

KN disc insulators to be used in case of 33 KV line & in 11 KV line it should be 45

KN insulators 2 nos. & 4 nos. are to be used.

3. Suitable pre formed armoured rods should be used in all suspension fittings in case of

higher size Conductors.

4. Guarding / pilot insulators at the sharp angle points has to be provided.

5. Four pair bolted type (suitable for M-16 bolts) tension fittings for AAA conductors and compression type tension fittings for ACSR conductors has to be used.

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

6.

The “distribution tie “ meant for pin insulator binding should be of no. 6 size and that of soft annealed wire having a minimum length of 3 mtr.

7. Compression type jointing sleeves should be used for jointing of conductors only.

9.0.2 Checking of Suspension Fitting

a) It shall be checked that there is no damage to any component of hardware fittings. b) It shall be verified that all nuts and bolts are tightened properly. c) It shall be made sure that all the necessary security pins (split pins) are fixed properly as per approved drawings.

9.0.3 Insulator hoisting a) Insulators shall be completely cleaned with soft and clean cloth. b) It shall be verified that there is no crack or any other damage to insulators. c)

It is very important to ensure that „R‟ clips in insulator caps are fixed properly. This is a security measure to avoid disconnection of insulator discs. d) Both Arcing horns (both at top & bottom) of each insulators string has to be provided.

Where change of insulators required, prior to fixing, all insulators shall be cleaned in a manner that will not spoil, injure or scratch surface of the insulator, but in no case shall any oil be used for that purpose.

Pin insulators shall be used on all poles in straight line and disc insulators on angle and dead end poles. Damaged insulators and fittings, if any, shall not be used. The insulator and its pin should be mechanically strong enough to withstand the resultant force due to combined effect of wind pressure and weight of the conductor in the span.

The pins for insulators shall be fixed in the holes provided in the cross-arms and the pole top brackets. The insulators shall be mounted in their places over the pins and tightened. In the case of strain or angle supports, where strain fittings are provided for this purpose, one strap of the strain fittings is placed over the cross-arm before placing the bolt in the hole of cross-arms. The nut of the straps shall be so tightened that the strap can move freely in horizontal direction.

All materials, which are to be supplied by the contractor should be procured from the approved Manufactures of SOUTHCO UTILITY„s only. Procurement from any suppliers will not be permitted. All the related drawings of materials have to be approved by Project Manager. All the materials has to be tested in presence of authorized representative of Project Manager as well as officers of

third party engaged by SOUTHCO UTILITY if any also.

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

14.0.6 PIN INSULATORS

14.0.6.1

33 Kv Pin Insulators.-IS-731/77 (Porcelain Insulator for O/H power lines with nominal voltage greater than 1000 volts.

14.0.6.2 33 Kv GI Pin: - Confirming to IS-2486 Part-I/1971.

14.0.6.3

11 Kv Pin Insulators: - IS-731/77 (Porcelain Insulator for O/H power lines with nominal voltage greater than 1000 volts.

14.0.6.4 11 Kv GI Pin: - Confirming to IS-2486 Part-I/1971.

14.0.7.2 PORCELAIN GLAZE:

Surfaces to come in contact with cement shall be made rough by stand glazing. All other exposed surfaces shall be glazed with ceramic materials having the same temperature coefficient of expansion as that of the insulator shell. The thickness of the glaze shall be uniform throughout and the colour of the glaze shall be brown. The glaze shall have a visible luster and smooth on surface and be capable of satisfactory performance under extreme tropical climatic weather conditions and prevent ageing of the porcelain. The glaze shall remain under compression on the porcelain body throughout the working temperature range.

14.0.7.3 METAL PARTS:

Cap and Ball pins:

Twin Ball pins shall be made with drop forged steel and caps with malleable cast iron. They shall be in one single piece and duly hot dip g galvanized. They shall not contain parts or pieces joined together, welded, shrink fitted or by any other process from more than one piece of material. The pins shall be of high tensile steel, drop forged and heat malleable cast iron and annealed. Galvanizing shall be by the hot dip process with a heavy coating of zinc of very high purity with minimum of 6 dips.

The bidder shall specify the grade, composition and mechanical properties of steel used for caps and pins.

14.0.7.4 SECURITY CLIPS:

The security clips shall be made of phosphor bronze or of stainless steel.

14.0.7.5 FILLER MATERIAL: i)

Cement to be used as a filler material shall be quick setting, for curing Portland cement. It shall not cause fracture by expansion or loosening by contraction. Cement shall not react chemically with metal parts in contract with it and its thickness shall be as small and as uniform as possible.

14.0.7.6 MATERIAL DESIGN AND WORKMANSHIP:

All raw materials to be used in the manufacture of these insulators shall be subject to strict raw materials quality control and to stage testing quality control during manufacturing stage to ensure the

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

quality of the final end product. Manufacturing shall conform to the best engineering practices adopted in the field of extra high voltage transmission. Bidders shall therefore offer insulators as are guaranteed by them for satisfactory performance on Transmission lines. ii) The design, manufacturing process and material control at various stages be such as to give maximum working load, highest mobility, best resistance to corrosion good finish, elimination of sharp edges and corners to limit corona and radio interference voltage

14.0.7.7 INSULATOR SHELL:

The design of the insulator shell shall be such that stresses due to expansion and contraction in any part of the insulator shall not lead to deterioration. Shells with cracks shall be eliminated by temperature cycle test followed by temperature cycle test followed by mallet test. Shells shall be dried under controlled conditions of humidity and temperature.

14.0.7.8 METAL PARTS: a) The twin ball pin and cap shall be designed to transmit the mechanical stresses to the shell by compression and develop uniform mechanical strength in the insulator. The cap shall be circular with the inner and outer surfaces concentric and of such design that it will not yield or distort under loaded conditions. The head portion of the insulator or is under tension the stresses are uniformly distributed over the pinhole portion of the shell. The pinball shall move freely in the cap socket either during assembly of a string or during erection of a string or when a string is placed in position. b) Metal caps shall be free from cracks, seams, shrinks, air holes, blowholes and rough edges. All metal surfaces shall be perfectly smooth with no projecting parts or irregularities which may cause corona.

All load bearing surfaces shall be smooth and uniform so as to distribute the loading stresses uniformly. Pins shall not show any macroscopically visible cracks, insulations and voids.

14.0.7.9 GALVANIZING:

All ferrous parts shall be hot dip galvanized six times in accordance with IS: 2629. The zinc to be used for galvanizing shall conform to grade Zn 99.5 as per IS: 209. The zinc coating shall be uniform, smoothly adherent, reasonably light, continuous and free from impurities such as flux ash, rust stains, bulky white deposits and blisters. Before ball fittings are galvanized, all die flashing on the shank and on the bearing surface of the ball shall be carefully removed without reducing the designed dimensional requirements.

14.0.7.10 CEMENTING:

The insulator design shall be such that the insulating medium shall not directly engage with hard metal. The surfaces of porcelain and coated with resilient paint to offset the effect of difference in thermal expansions of these materials.

14.0.7.10 (a) Specific Requirement for Insulators

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

The insulators shall confirm in the following specific conditions of respective IS given in the table below

Insulator

11 KV

33 KV

33KV/11KV

Pin

Pin

Stay

Designation

Type-B of IS731

Type-B of IS731

Minimum mechanical failing load

10 KN

10 KN

88 KN

Minimum

Creepage distance

320 mm

580 mm

57 mm Type-C of IS 1445

LT Stay Type-C of IS 1445 44 KN 41 mm

Sl.

33 KV, 11 KV PIN INSULATORS, GURANTEED TECHNICAL PARTICULARS

GURANTEED TECHNICAL PARTICULARS

(To be submitted along with offer)

Description

SOUTHCO‟s

Bidder‟s Offer

No.

1

Manufacturer‟s name

2 Address of manufacturer

Approved

Standard

3 Location of type testing

4

5

Applicable standard

Type of insulator (Porcelain or toughened glass)

6 Dry impulse withstand voltage

7 Wet power frequency, 1 minute, withstand voltage

8 Dry, Critical Impulse Flashover Voltage

9 Dry, power frequency, Critical Flashover

Voltage

10 Wet, power frequency, Critical Flashover

Voltage

11 Power frequency Puncture Voltage

12 Safe Working Load

13

14

Minimum Failing Load

Creepage Distance

15 Protected Creepage Distance

16 Type and Grade of Materials : Insulator

17 Type and Grade of Materials : Thimble

18 Type and Grade of Materials : Cement

19 Type of semi conducting Glaze

20 Radius of conductor Groove

21 Colour of Insulator

22 Weight of Insulator

23 Number of Insulators per Crate

24 Gross Weight of Loaded Crate

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

25 Whether drawing showing dimensional details have been furnished along with Bid

26 Whether Type Test Certificate have been furnished

27 Other particulars (if any)

SUPERINTENDING ENGINEER, ELECTRICAL CIRCLE, RAYAGADA

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