NORTH EASTERN ELECTRICITY SUPPLY COMPANY OF ORISSA LIMITED SECTION - III TECHNICAL SPECIFICATION OF ELECTRICAL MATERIALS GROUP B

Transcription

1 SECTION - III TECHNICAL SPECIFICATION OF ELECTRICAL MATERIALS GROUP B - 1

2 1. Single Pole Transformer Mounting Bracket. Quantity 195 Nos. TECHNICAL SPECIFICATION Single Pole Transformer mounting Bracket suitable for installation of single Phase 11/.23 KV 10KVA and 16 KVA and 25KVA 11/0.4KV Transformers made out of 75x40x6 mm MS channel,65x65x6 mm & 50x50x6mm MS Angle as per drawing REC Standard is to be followed. The mounting bracket will be painted with two coats of red-oxide paints. Bill of materials : 1. 75x40x6 mm M.S channel 2 nos.(transformer mounting channel) with 50x8 mm -2 nos. M.S flat flange welded for fixing of transformer base channel x65x6 mm M.S angle 2 nos.(cantilever) 3. 50x50x60 mm M.S angle 2nos. ( fixing with pole) Approved drawing enclosed. - 2

3 2.i) 33 KV V Cross arm (MS) Quantity 33 KV V cross arm made out of 100x50x6 mm M.S Channel as per REC Standard M-1. The cross arm shall be fabricated out of 100x50x6 mm size channel having 9.2 Kg/mtr.. After fabrication the cross arm shall be painted with two coats of Red Oxide primer, conforming to REC construction standard & drawing. 300 Nos. Guaranteed Technical Particulars of 33 KV 'V' Cross Arm Sl. No. Description Specified Bidders Offer 1 Type of Cross Arm ISMC 100x50 2 Channel Weight 9.2 Kg/mtr 3 Grade of Steel FY Steel Standard IS: Fabrication Standard IS:802 (part - 2) Dimension (100x50x6)mm 7 Size of M S Flat welded at both ends 50x8mm 8 Steel Tensile Strength 1500kgf/cm² 9 Working Load 400/ 450/ 550/600Kg 10 Total Weight 19.7 Kg (approx.) - 3

4 2.ii) 11 KV V Cross arm (MS) Quantity 11 KV V cross arm made out of 75x40x5 mm M.S Channel as per REC Standard A6. The cross arm shall be fabricated out of 75x40x5 mm size channel having 6.8 Kg/mtr. with 50mmx6mm flat as per drawing on top & bottom flange of the channel where the insulator pin is to be mounted. After fabrication the cross arm shall be painted with two coats of Red Oxide primer, conforming to REC construction standard & drawing. 500 Nos. Guaranteed Technical Particulars of 11KV 'V' Cross Arm Sl. No. Description Specified Bidders Offer 1 Type of Cross Arm ISMC 75x40 2 Channel Weight 6.8Kg/mtr 3 Grade of Steel FY Steel Standard IS: Fabrication Standard IS:802 (part - 2) Dimension (75x40x5)mm 7 Size of M S Flat welded at both ends 50x8mm 8 Steel Tensile Strength 1500kgf/cm² 9 Working Load 200/300/350/400Kg 10 Total Weight Kg (approx.) - 4

5 2.iii) 3 Ph. 4 W LT Cross arm Quantity LT cross arm (3 phase,4 wire) made out of 75mm x40 mm Channel. The cross arm shall be fabricated out of (75x40) mm channel with 50mmx6mm cleats as per drawing on top & bottom flange of the channel where the insulator pin to be mounted, conforming to REC Construction Standard & drawing Nos. 2.iv) 3 Ph. 5 W LT Cross arm Quantity LT cross arm (3 phase,5 wire) made out of 75mm x40 mm Channel. The cross arm shall be fabricated out of (75x40) mm channel with 50mmx6mm cleats as per drawing on top & bottom flange of the channel where the insulator pin to be mounted, conforming to REC Construction Standard & drawing. 200 Nos. - 5

6 3.i) Back Clamp for 33 KV V Cross arm Quantity Back clamp for 33 KV V cross arm made out of 50x8 mm MS Flat with two coat of red-oxide primer suitable for HT poles confirming to REC Construction Standard & drawing Nos. 3.ii) Back Clamp for 11 KV V Cross arm Quantity Back clamp for 33 KV V cross arm made out of 50x8 mm MS Flat with two coat of red-oxide primer suitable for HT PSC poles confirming to REC Construction Standard & drawing. 800 Nos. 3.iii) Back Clamp for LT Cross arm Quantity Back clamp for LT cross arm made out of 50x8 mm MS Flat with two coat of red-oxide primer suitable for PSC poles confirming to REC Construction Standard & drawing. 500 Nos. 3.iv) HT Stay Side Clamp Quantity HT stay clamp suitable for PSC poles made out of 50x8 mm MS Flat with two coat of red-oxide primer, confirming to REC Construction Standard & drawing. 300 Pairs - 6

7 4. 11KV Pole Top Bracket Quantity 11 KV line pole top bracket made out of 50x8 mm M.S Flat with two coat of red-oxide primer, confirming to REC Construction Standard.A-7 & drawing. 500 Nos. GUARANTEED TECHNICAL PARTICULARS FOR 11KV POLE TOP BRACKET Sl.No. Constructional Features Specified Bidders Offer 1. Material used 50x8 mm MS Flat 2. Overall height 385 mm 3. Flange Width (one welded & 60 mm one bent) 4. Spacing between two flanges 75mm 5. Spacing of 2 nos of 18mm holes 100mm for fixing on pole top 6. C/L Distance of 2nos of 22mm holes on top flanges of the 25mm from edge of the flange bracket 7. ISS Drawing enclosed - 7

8 5.i) 1-Ph. 2W LT spacer (Composite Type) Quantity LT Spacer suitable for 1-phase, 2 wire LT line made of polypropylene single mould, confirming to REC Construction Standard.B-18 & drawing Nos. 5.ii) 3-Ph. 3W LT spacer (Composite Type) Quantity LT Spacer suitable for 3-phase, 3 wire LT line made of polypropylene single mould, confirming to REC Construction Standard.B-18 & drawing Nos. 5.iii) 3-Ph. 4W LT spacer (Composite Type) Quantity LT Spacer suitable for 3-phase, 4 wire LT line made of polypropylene single mould, confirming to REC Construction Standard.B-18 & drawing Nos. 5.iv) 3-Ph. 5W LT spacer (Composite Type) Quantity LT Spacer suitable for 3-phase, 5 wire LT line made of polypropylene single mould, confirming to REC Construction Standard.B-18 & drawing Nos. - 8

9 6.i) 11 KV G.I Pin Quantity 11 KV hot-dipped galvanizing Pin suitable for 11 KV pin insulator, confirming to REC Construction Standard. C Nos. GUARANTEED TECHNICAL PARTICULARS FOR 11KV G.I PIN Sl.No. Description Specified Bidders Offer 1 Manufacturer Name & Address To be specified by Bidder 2 Type of Pin 11KV 3 Applicable International Standard IS:2486 (part-ii) 4 Grade Steel HDG Steel 5 Steel Specification HDG Steel 6 Specification of Bolt & Nut As per ISS 7 Specification of Bolt Threads As per ISS 8 Mechanical falling load (MFL) 10 KN 9 Elongation at MFL As per ISS 10 Maximum deflection of Pin Top at 1.5 mm MFL 11 Galvanising Specification IS Minimum weight of Steel deposited 610 g/m² on steel surface 13 Pin Length 315 mm 14 Shank Length 150 mm 15 Stalk Length 165 mm 16 Type of Thread As per ISS 17 Thread Length As per ISS 18 Drawing enclosed. - 9

10 6.ii) LT G.I Pin Quantity LT hot-dipped galvanizing Pin suitable for LT pin insulator, confirming to REC Construction Standard. D-2. GUARANTEED TECHNICAL PARTICULARS FOR LT G.I PIN 800 Nos. Sl. Description Specified Bidders Offer No. 1 Manufacturer Name & Address To be specified by Bidder 2 Type of Pin LT 3 Applicable International Standard IS:2486 ( Part-II) 4 Grade Steel HDG Steel 5 Steel Specification HDG Steel 6 Specification of Bolt & Nut As per ISS 7 Specification of Bolt Threads As per ISS 8 Mechanical falling load (MFL) 10 KN 9 Elongation at MFL As per ISS 10 Maximum deflection of Pin Top at 1.5 mm MFL 11 Galvanising Specification IS Minimum weight of Steel deposited 610 g/m² on steel surface 13 Pin Length 260 mm 14 Shank Length 125 mm 15 Stalk Length 135 mm 16 Type of Thread As per ISS 17 Thread Length As per ISS 18 Drawing enclosed - 10

11 7.i) 33 KV H/W Fittings (B&S) Quantity 33 KV Hard Ware fittings Ball and socket type,confirming to IS: 2486 (Part-II) latest amendment and as per drawing. 500 Sets ii) 11 KV H/W Fittings (T&C) Quantity 11 KV Hard Ware fittings Tongue & Clevis type,confirming to REC Construction Standard C-2 and as per drawing. 500 Sets TECHNICAL SPECIFICATION T & C and B & S Hardware Fittings The hardware fittings for B & S and T & C Strain Disc Insulator. For use in 33 KV and 11 KV Overhead power lines shall comply IS:2486 (Part-I) 1971 and 2486 (Part-II) / 1974 and IS:2486 (Part-III) 1974 IS:12048 /1987 and REC Specification 24/84 or the latest revision thereof. All Forging and Casting shall be good finish and free from flows and other defects. The edges on the outside of fittings such as at the Eye, Cleaves and Holes shall be rounded. All parts of different fittings, which provide for Inter-connection shall be made such that sufficient clearance is provided at the Connection Point to ensure free movement & suspension of the Insulator string Assembly.All eye and cleaves shall be free in this manner but care shall be taken that too much clearance between Eye & Tongs of the cleaves is avoided. All ferrous fittings and parts other than those of Stainless steel shall be hot dip galvanized as per ISS: 2633 / 1964.Small fittings like Spring washer, Nuts etc. may be Electro-galvanized as per IS-6745 / 72.The threads of nuts and topped holes when cut after Galvanizing shall be well cited & grassed. (A) Ball & Socket type Hardware fittings(conversional / Performed ) for B & S type Strain Insulators The hardware fittings (Ball and Socket type) shall be suitable for fixing on 100 mmx50 mm channel cross arms and for accommodation of 55 mm² / 100 mm² Conductor. The set shall complete with following components (i) Cross-arms straps with Bolts & Nuts, Brass split and Spring Washer. (ii) Two numbers forged cotter pins,brass split pins,plain washer. - 11

12 (iii) One number Ball Eye of malleable cast iron (iv) One number of socket eye complete with security clips made of Phosphor bronze made cut of alluminium alloys-a/6. (v) Halically formed Dead and Conductor grip having a Pre-fabricate loop to fit into the proved contour of the thimbles on one end and for application over the conductor at the other end for 55 mm²/100mm² conductors. (vi) Strain clamps shall be suitable for above ACSR / AAAC.The ultimate strength of clamp should not be less than 4500 Kg and Slipping strength shall not be less than 90% of these figures. (B) Tongue & Clevics type Hardware Fittings (Conventional / ¼ Performed ) for T & C type Strain Insulators The Hardware fittings ( Tongue & Clevis type) shall be suitable for fixing on 75 mmx40 mm Channel Cross Arm an accommodation 34mm²/55mm²/100mm² Conductors. The set shall comply of the following components :- (i) Cross arms straps (Dead & Straps) with Bolt (16mm) Nut and Spring Washer. (ii) Two Nos. forged cotter pints and spring washer to suit the tongue and the clevics. (iii) Formed helical fittings should be of suitable materials i.e all alloy aluminum steel (iv) suitable for 34mm²/55mm²/100mm² ACSR/AAAC. Strain clamps shall be suitable for the above ACSR conductor or AAAC.The ultimate strength of the clamp should not be less than 3000 Kg and slipping strength shall not be less than 90% of this figure.the clamp should be malleable cast iron/all alloy A-6. Tests : String insulator fittings shall comply with the following tests as per IS: 2486 (Part.I) Type Tests: a) Visual examination test ii) Verification of dimensions iii) Slip strength test iv) Mechanical test v) Electrical resistance test vi) Heating cycle test vii) Galvanising test. Acceptance/ Routine Test : i)verification of dimensions ii) Mechanical test iii) Galvanising test iv) Vidual examination test v) Routine mechanical test. Marking : The caps and clamps shall have marked on them as trade mark & year of manufacturing. - 12

13 Packing : All hardware fittings shall be packed in bags or boxes suitable for rough handling. Packing shall be marked with the strength and KV rating. Guaranteed Technical Particulars : The bidders are required to furnish the guaranteed technical particulars duly filed in the proforma along with the bid. GUARANTEED TECHNICAL PARTICULARS FOR 11 KV H/W FITTINGS ( T&C ) Sl.No. Description Specified Bidders Offer 1. Manufacturer Name & To be specified by Bidder Address 2. Standard Specification to IS: 2486 (Part-I,II &II) which Hard ware Fittings shall confirm. 3 Ultimate strength 3000 Kg (min) 4. Dimensions in accordance IS: 2486(Part-II) with 5 Type of washer thickness a) Spring 2.5 mm b)flat 2.5 mm 6. Type of Clamp size Tension Clamp suitable for Squiral/Weasel/ Rabbit 7. Galvanised conform to IS 2633, IS: & IS: Weight of Fittings.. 9. Tolerance in dimension if + 5% any 10. Manufacturer trade mark to be Specified by the Bidder embossed on the sets 11. Specific drawing to be enclosed. Enclosed NB. All ferrous fittings and the parts other than those of stainless steel, shall be galvanized. - 13

14 GUARANTEED TECHNICAL PARTICULARS FOR 33 KV H/W FITTINGS ( B&S ) Sl.No. Description Specified Bidders Offer 1. Manufacturer Name & To be specified by Bidder Address 2. Standard Specification to IS: 2486 (Part-I,II &II) which Hard ware Fittings shall confirm. 3 Ultimate strength 4500 Kg (min.) 4. Dimensions in accordance IS: 2486(Part-II) with 5 Material used and reference to Standard: i) Cross arm Strap G.I as per IS:1570 ii) Ball Eye Forged Steel IS:2004 iii) Socket Eye Malleable Cast Iron IS: iv) Bolted type tension clamp & its keeper 2108/1962 Aluminium Alloy LM-6, IS: Galvanised conform to IS 2633, IS: & IS: Weight of Fittings not less than 2.5 Kg. 8. Tolerance in dimension if + 5% any 9. Manufacturer trade mark to be Specified by the Bidder embossed on the sets 10. Specific drawing to be enclosed. Enclosed NB. All ferrous fittings and the parts other than those of stainless steel, shall be galvanized. - 14

15 8. M16 M.S Nuts & Bolts Quantity 16 mm diameter M.S Nuts and Bolts black hexagonal As per IS: 1387 (Part-II) Gr.-4/4.6 of following size i) 16x40 mm ( Fully threaded) 400 Kg ii) 16x125 mm ( Treaded length 70 mm) 1140 Kg iii) 16x150 mm ( Treaded length 70 mm) 1070 Kg iv) 16x175 mm ( Treaded length 70 mm) 1210 Kg v) 16x200 mm ( Treaded length 70 mm) 930 Kg vi) 16x225 mm ( Treaded length 70 mm) 3000 Kg vii) 16x250 mm ( Treaded length 80 mm) 840 Kg viii) 16x275 mm ( Treaded length 80 mm) 850 Kg ix) 16x 300 mm ( Treaded length 80 mm) 1000 Kg x) 16x350 mm ( Treaded length 80 mm) 920 Kg SPECIFICATION OF FINISHED PRODUCTS : 1. The bolts & Nuts shall be ISI Marked Mild Steel of Black Grade B and shall be round with hexagonal head. (i) The Bolts and Nuts shall be manufactured by Hot/Cold forging process neatly and cleanly finished and shall have metric threads as per IS : 4218/1967 with its latest amendments. (ii) The dimensions of the bolts & nuts and tolerances should conform to IS: 1363 with their latest amendments in all respect. The eccentricity and angular errors of various elements shall be within specified limits as per IS: 1367/1967 with its latest amendments the bolts & nuts shall be free from forging and threading defects such as cuts, spats. burns, bulging taper eccentricity, loose fill etc. which may affect their serviceability. (iii) The colt heads and nuts shall be chamfered on one face only and other face shall be machined made. (iv) Mechanical property requirement of tester shall conform to IS: 1367 (Part-III) - 15

16 1979 property class 4.6 for bolts & property class-5 for nuts as per IS: 1367 (Part VI) (v) The bolts & nuts shall be supplied in well-cleaned conditions and suitably protected against corrosion in individual bags of 50 kgs. 2. ACCEPTANCE TESTS: The bidder should furnish test certificate from his awn/recognized Govt. Laboratory giving the results of tests as per IS: 1367 (Part-Ill) 1979 & IS: 1367 (Part-VI) 1980 The test certificate shall be in respect of the following for all sizes of both bolts & nuts as applicable given below:- i) Dimensional particulars (Sampling Ifl accordance with IS: 2614 for both bolts & nuts (tolerance as per drawing). ii) Tensile strength test on full size (for bolts minimum 400 NI Sq.mm and for Nuts Proof Stress test Mm 610 N/Sq. mm). iii) Power load test on full size bolts and M N for 15 Sec. iv) Head soundness tests for bolts (no fracture). v) Brinell hardness tests or Rockwell Hardness or Vickers s Hardness tests for bolts min- 114 &max. 209 or mm. 67 & max. 95 or mm. 120 & max. 220 respectively. For nuts Vickers s Hardness mm. 130 & max PRE-DESPATCH INSPECTION AND TEST The bidder shall arrange to carryout acceptance tests in presence of owners inspecting officer in his own laboratory. In case testing facilities are not available at works he will make necessary arrangements for carrying out these tests at a Govt. recognized lab at his own expense(s) and will provide all testing arrangement for Board s representative to witness the tests. 4. Markings: On the bolt head, there shall be identification marking of the manufacturer as well as property class 4.6. If possible property class 5 shall be marked on Nuts also. Further ISI mark shall be marked on Sunny Bags for proper identification. - 16

17 9. 16 mm LT Stay Set ( Galvanized) Quantity 200 Sets TECHNICAL SPECIFICATION OF LT STAY SET 1. SCOPE This specification covers design, manufacture, testing of 16 mm GI Stay Sets. 2. GENERAL REQUIREMENTS i) 16 MM Dia Stay sets (Galvanized) LT Stay Set This stay sets (Line Guy set) will consist of the following components:- ii) Anchor Rod with one washer and Nut Overall length of rod should be 1800 mm to be made out of 16 mm dia GS Rod, one end threaded up to 40 mm length with a pitch of 5 threads per cm and provided with one square GS washer of size 40X40x1.6mm and one GS hexagonal nut conforming to IS:1367:1967 & IS:1363:1967. Both waster and nut to suit threded rod of 16 mm dia. The other end of the rod to be made into a round eye having an inner dia of 40mm with best quality welding. iii). Anchor Plate Size 200 x 200 x6 mm To be made out of GS plate of 6 mm thickness. The anchor plate should have at its centre 18 mm dia hole. iv) Turn Buckle & Eye Bolt with 2 Nuts To be made of 16 mm dia GS Rod having an overall length of 450mm, one end of the rod to be threaded up to 300 mm length with a pitch of 5 threads per cm and provided with two GS Hexagonal nuts of suitable size conforming tois:1363:1967 & IS:1367:1967. The other end of rod shall be rounded into a circular eye of 40mm inner dia with proper and good quality welding. v) Bow with Welded Angle To be made out of 16mm dia GS rod. The finished bow shall have an over all length of 995 mm and eight of 450 mm, the apex or top of the bow shall be bent at an angle of 10 R. The other end shall be welded with proper and good quality welding to a GS angle 180 mm long having a dimension of 50x50x6mm. The angle shall have 3 holes of 18 mm dia each. vi) Thimble - 17

18 To be made on 1.5 mm thick GS sheet into a size of 75x22x40mm and shape as per standard shall be supplied. Average Weight of Finished 16mm Stay Sets shall be at least KG (Minimum) (Excluding Nuts Thimbles and Washer) Kg. (Maximum) 3. Galvanizing The complete assembly shall be hot dip galvanized as per ISS. 4. Welding The minimum strength of welding provided on various components of 16mm shall be 3100 kg. Minimum 6mm filet weld or its equivalent weld area should be deposited in all positions of the job i.e. at any point of the weld length. The welding shall be conforming to relevant IS:823/1964 or its latest amendment. 5. Threading The threads on the Anchor Rods, Eye Bolts and Nuts shall be as per specification IS; 4218:1967 (ISO Metric Screw Threads). The Nuts shall be conforming to the requirements of IS: 1367:1967 and have dimension as per IS 1363:1967. The mechanical property requirement of fasteners shall confirm to the properly clause 4.6 each for anchor rods and Eye bolt and property clause 4 for nuts as per IS: 1367: TESTS The contractor shall be required to conduct testing of materials at Govt./Recognized testing laboratory during pre-dispatch inspection for Tensile Load of 3100 Kg applied for one minute on the welding and maintained for one minute for 16 mm dia stay sets. 7. IDENTIFICATION MARK All stay sets should carry the identification mark of the Purchaser NESCO as applicable. This should be engraved on the body of stay rods to ensure proper identification of the materials. The nuts should be of a size compatible with threaded portion of rods and there should be not play or slippage of nuts. Welding wherever required should be perfect and should not give way after erection. 8. TOLERANCES The tolerances for various components of the stay sets are indicated below subject to the condition that the average weight of finished stay sets of 16mm dia excluding nuts, thimbles and washers shall not be less than the weight specified above:- - 18

19 GURANTEED TECHNICAL PARTICULARS OF LT STAY SETS Sl No. Item Descript ion 1. Anchor Plate Specified Parameters Section Tolerances 6mm thick +2.5%-5% Material Fabrication Tolerances 200x200mm+1% GS Plate 6 mm thick Bidder s offer 2. Anchor Rod 3. Turn Buckle Bow 16mmdia +5%- 3% 16mm dia +5%-3% Length1800mm+0.5% Rounded Eye 40 mm inside dia +3% Threading 40mm+11%-5% 995mm+1% 16mm dia GS Round 16mm dia GS Round 16mm dia GS Round 16mm dia. 4. Eye Bolt Rod 16mm dia +5%-3% Length180mm +1% 50x50x6mm Length 450mm + 1% Threading 300mm +1% Round Eye 40mm inside dia+3% GS Angle GS Round 16 mm dia 5 Galvanisatio n thickness a Anchor Plate b Anchor Rod c TurnBuckle Bow d Eye Bolt Rod All galvanization shall be carried out in accordance with IS: The weight of Zinc deposited shall be in accordance with IS: 2629 and shall not less than 0.61 kg/m² with a minimum thickness of 86 microns for items of thickness more than 5 mm, 0.46kg/m²(64 microns) for items of thickness between 2 mm & 5 mm& 0.33kg/m²(47 microns) for items less than 2 mm thickness. 6 Thimble 2 nos. to be made of 1.5 mm thick G.S Sheet into a size 75x22x40 mm & shape as per standard. One G.S Hexagonal Nut confirming to IS:1363 & 1367 with one square washer of size 50x50x6 mm (G.S) along with Anchor Rod. Two G.S Hexagonal Nuts of suitable size along with Eye Bolt Rod. - 19

20 10. 7/12 SWG G.I Stay Wire Quantity 1300 Kg TECHNICAL SPECIFICATIONS STAY WIRE (7/12 SWG) 1. Application Standards Except when they conflict with the specific requirements of this specification, the G.I Stay Stranded Wires shall comply with the specific requirements of IS: IS: & IS: or the latest versions thereof. 2. Application and Sizes a) The G.I. stranded wires covered in this Specification are intended for use on the overhead power line poles, distribution transformer structures etc. b) The G.I stranded wires shall be of 7/12 SWG 7/2.5 mm for LT lines standard sizes. 3. Materials The wires shall be drawn from steel m a de by the open hearth basic oxygen or electric furnace process and of such quality that when drawn to the size of wire specified and coated with zinc, the finished strand and the individual wires shall be of uniform quality and have the properties and characteristics as specified in this specification. The wires shall not contain sulphur and phosphorus exceeding 0.060% each. 3.1 Tensile Grade The wires shall be of tensile grade 4, having minimum tensile strength of 700 N/mm² conforming to 1S: General Requirements a) The outer wire of strands shall have a right-hand lay. b) The lay length of wire strands shall be 12 to 19 times the strand diameter. - 20

21 3.3 Minimum Breaking Load & Galvanising The minimum breaking load of the wires before and after stranding shall be as follows: Min. breaking load of the No. of Wires & Const. Wire Dia (mm) Single wire before stranding (KN) Min. breaking load of the standard wire (KN) 7 (6/1) Minimum weight of zinc coating before stranding Minimum weight of zinc coating before stranding 490 gm/mm2 490 gm/mm2 490 gm/mm2 475 gm/mm2 475 gm/mm2 475 gm/mm2 4. Construction a) The galvanized stay wire shall be of 7-wire construction. The wires shall be so stranded together that when an evenly distributed pull is applied at the ends of completed strand, each wire shall take an equal share of the pull. b) Joints are permitted in the individual wires during stranding but such joints shall not be less than 15 metres apart in the finished strands. c) The wire shall be circular and free from scale, irregularities, imperfection, flaws, splits and other defects. 5. Tolerances A tolerance of (+) 2.5% on the diameter of wires before stranding shall be permitted. 6. Sampling Criteria The sampling criteria shall be in accordance with IS :

22 7. Tests on Wires before Manufacture i) The wires shall be subjected to the following tests in accordance with IS :2141. a) Ductility Test b) Tolerance on Wire Diameter ii) Tests on Completed Strand The completed strand shall be tested for the following tests in accordance with IS:2141. a) Tensile and Elongation Test: The percentage elongation of the stranded wire shall not be less than 6%. b) Chemical analysis c) Galvanizing Test The Zinc Coating shall conform to "Heavy Coating" as laid down in 1S: Marking Each coil shall carry a metallic tag, securely attached to the inner part of the coil bearing the following information: a) Manufacturers name or trade mark b) Lot number and coil number c) Size d) Construction e) Tensile Designation f) Lay g) Coating h) Length i) Mass j) ISI certification mark, if any 9. Packing The wires shall be supplied in Kg. coils. The packing should be done in accordance with the provisions of IS:

23 GURANTEED TECHNICAL PARTICULARS STAY WIRE (7/12 SWG) Sl. No. GENERAL TECHNICAL PARTICULARS Specified 1 Nominal diameter of wire in mm Tolerance in diameter in mm 2.5% 3 Minimum breaking load in Kg Tensile strength Kgf/mm² Overall diameter of stranded wire in mm Sectional Area (in mm².) Coating Test a Type of zinc coating whether heavy or light Heavy b Weight of coating in g/m² 476 8a Length of wire in each coil in mtr. 298 b Tolerance + 5% Bidder s offer 9 No. of dips the coating is able to withstand 3 dip in min. as 18 ± 20ºC 10 Adhesion Test (Wrap Test at 1 turn per second coiling while stress not exceeding % nominal tensile strength) a Min. complete turn of wrap To be specified by bidder b Dia of mandrel on which wrapped - do - 11 Bend Test a Angle - do - b Dia round a format to be bent - do - 12 Freedom from defect - do - 13 Chemical composition the MS Wire used shall not exceed a Sulphur 0.060% - do - b Phosphorous 0.065% - do - 14a Weight of wire in Kg/Km 310 b Tolerance + 5% 23

24 11. Aluminium cable Socket Quantity Cable Lugs of Aluminium tubular terminal end of any reputed make with ISI mark for crimping to all conductors of following sizes. i) 120 Sq. mm 500 nos. ii) 185 Sq. mm 700 nos. iii) 240 Sq. mm 500 nos. iv) 300 Sq. mm 1000 nos. 12. Aluminium Binding Wire Quantity EC grade hard drawn Aluminium rods of 3.53mm diameter complying with IEC : 1089/IS Kg. TECHNICAL SPECIFICATION ALUMINIUM BINDING WIRE Sl. Particulars Specified Bidders Offer No. 1. Binding Wire IEC : 1089/IS Chemical composition of Binding Wire 3. The surface of the wire shall be smooth and free from all irregularities and imperfections. Its cross section shall closely approximate that of a true circle. Aluminium 99.5% minimum Copper, silicon and iron 0.5% maximum. 4. Diameter of Wire (mm) Minimum Nominal Maximum 5. Weight of wire kg/km Breaking load (KN)

25 13. Tinned Copper Fuse Wire Quantity in Kg. Annealed Tinned Copper Fuse Wire conforming to IS: 9926/1981 of Capacity, diameter in SWG & mm,approximate fusing current in Amp. mentioned against tabulation of the following rating : i) 5 Amp. 100 Kg. ii) 10 Amp. 200 Kg. iii) 63 Amp 250 Kg. iv 102 Amp. 250 Kg v) 200 Amp. 200 Kg. Size of T.C wire (dia. in SWG /mm) Specified by Bidder Fusing current (Approx.) in Amp. Specified by Bidder 14. Kit-Kat Fuse Quantity Kit Kat Fuse unit with porcelain base & carrier of reputed brand complete with extended terminals as per relevant ISS : 2086/1993, Amendment-I of following ratings: i) 300 Amp. 500 nos. ii) 400 Amp. 700 nos. 15.i) 33 KV Danger Board Quantity 500nos. ii) 11 KV Danger Board Quantity 1310 nos. 25

26 ECHNICAL SPECIFICATION 33KV/ 11KV DANGER BOARD Sl.No. Particulars Specified Bidders Offer 1. Design of Danger plate IS: 2551/1982 shall be as per 2. Letters and Bone skulls marks Red Vitreous Enameled 3. Back Ground White Vitreous Enameled 4. Back Side Black Vitreous Enameled 5. Material 1.6mm Thick Mild Steel Plate 6. Letter Language Oriya / English / Hindi 7. 2 nos of 2mm Thick lead washer and 2 nos of 6mm dia. Bolts and Nuts to be supplied with each number plate 8. Drawing Enclosed Name & Signature of tenderer with seal NOTE: - 1. On asking, after opening of tenders, the qualified bidders should be submitted specific samples to the SDO, Stores for finalization of the Tender. 2. The Manufacturer and Authorized Dealer of reputed company shall be given priority on production of Documentary Evidence. 3. The material when ordered should be dispatched to the Stores Balasore by Road Transport. 4. Tenderer should put their signature with seal in all the above pages. 5. The undersigned reserves the right to reduce or increase the quantity at time of placing orders and right to reject any or all quotations without assigning any reason thereof. 6. Price variation clause is not allowed. General Manager (Works) NESCO, Balasore. 26

27 Price Schedule GROUP - B Sl. No. Description of materials Unit Unit Ex-works price Excise Duty Rs. (@..%) Sale Tax/ VAT Rs. (@..%) Freight & Insurance Total Entry Tax Rs. (@. %) Total Landed Price (Rs.) Offered quantity Total Amount in Rs. 1. Single phase transformer mounting bracket. 2. i) 33 KV V cross arm (MS) No ii) iii) iv) 11 KV V cross arm(ms) LT 3ph 4 wire cross arm LT 3ph 5 wire cross arm 3 i) Back clamp for 33 KV V cross arm. ii) Back clamp for 11 KV V cross arm. iii) Back clamp for LT cross arm. iv) HT stay set side clamp KV Pole Top bracket 5. LT spacers i) Suitable for 1-ph,2w ii) Suitable for 3-ph,3w iii) Suitable for 3-Ph, 4w iv) Suitable for 3-ph, 5w 6 i) 11 KV GI pin ii) LT GI pin 7 i) 33 KV H/W fittings(b&s) ii) 11KV H/W fittings (T&C) 8 MS Nuts & Bolts i) 16x40 mm ii) 16x125mm 27

28 iii) 16x150mm iv) 16x175mm v) 16x200mm vi) 16x225mm vii) 16x250mm viii) 16x275mm ix) 16x300mm x) 16x350mm mm LT Stay Set 10. 7/12 SWG G.I Stay wire 11. Aluminium cable socket i) 120 mm² ii) 185 mm² iii) 240 mm² iv) 300 mm² 12. Aluminium binding wire 13. Tinned Copper Fuse Wire i) 5 Amp. ii) 10 Amp. iii) 63 Amp. iv) 102 Amp. v) 200 Amp. 14. Kit-Kat Fuse i) 300 Amp ii) 400 Amp. 15. i) 33 KV Danger Board ii) 11 KV Danger Board Name and Signature of the Tenderer with Seal 28