2.1 Similar parts of any equipment supplies shall be interchangeable.

Transcription

1 B. TECHNICAL SPECIFICATIONS ELECTRICAL 1 B. TECHNICAL SPECIFICATION - ELECTRICAL 1.0 SCOPE The scope of the work involved Supply, Erection, Electrification, & Commissioning of Construction of Two Smart Roads at KPTCL Road and MANDOLI Road for Belagavi Smart City Project. a. Running of 11 KV line on 9.0 Mtr long RCC poles of 145 Kg working load with an average span of 50 Mtr. using Rabbit ACSR conductor. b. Erection of 11 kv/415 Volts, 25 KVA, 63 KVA, 100 KVA and 250 KVA 50 Hz Distribution Transformer Centers using 9.0 Mtr long RCC poles of 145 Kg working load. c. Running of LT, 3 phase 4 wire power lines on 9.0 Mtr long RCC poles of 145 Kg working load with an average span of 50 Mtr using Rabbit ACSR conductor. d. Erection of HT Meter cubicle e. Providing Service Main connection to the Water supply pump set installations of the schemes. The contractor shall execute the above works which involves the supply, transportation to work site, erection, assembly, testing and commissioning of the lines and equipments. 1.1 The details of equipment to be supplied, transported, erected, assembled, tested and commissioned are indicated in Schedule of Bill of Materials 1.2 Any other items not specifically mentioned but which are essentially required for satisfactory performance & completeness of work shall deemed to be included in the scope of specifications and works and the same shall be executed / carried out by the contractor at no extra cost to the owner. 1.3 Unless otherwise stated, all equipments / material to be supplied and used under this contract shall be new. 1.4 The materials to be supplied and the erection standards shall comply with the Bureau of Indian Standards /other International standards. 2.0 General requirements 2.1 Similar parts of any equipment supplies shall be interchangeable. 2.2 All equipment/materials shall be submitted for inspection by a duly authorized representative of the Engineer-in-charge. Inspection may be made at any stage of manufacture, dispatch or at site or the places at the options of the Engineer-in-charge. The equipment to be dispatched/ about to be dispatched, if found unsatisfactory as to workmanship or quality, the same liable to be rejected. The contractor shall grant free access to the places of manufacture to the authorized representative of the Engineerin-charge at all times when these works related to the manufacture are in progress.

2 B. TECHNICAL SPECIFICATIONS ELECTRICAL Inspection and acceptance of any equipment / materials under specifications by the Engineer-in-charge or his authorized representative shall not relieve the Contractor of his obligations of furnishing / supplying equipment in accordance with the specifications. 2.4 All equipments / materials being supplied by the contractor shall confirm to the Type tests and shall be subject to Routine tests in accordance with relevant standards. 2.5 Type tests and Routine tests on the equipment being supplied, whenever specified shall be carried out in accordance with relevant standards, at the contractors cost. 2.6 Copies of all Routine test certificates of the following equipments shall be furnished to the Engineer. 1) RCC Poles 2) Insulators 3) Spiral Earth Electrode 4) Guy Set 5) 11 KV GOS 6) Rabbit ACSR conductor 7) 3Cx400 Sq.mm XLPE Cable 8) 3Cx95 Sq.mm XLPE Cable 9) Straight through jointing kits 10) LT Feeder pillar box 11) Lightning Arrester 12) ETV Meter 13) HG Fuse Units 14) GI and PVC Pipes. Routine tests shall be witnessed at the manufacturer s premises in respect of above materials by the representative of the Engineer. The contractor shall issue at least 15 days clear notice of routine tests to be conducted with details of time, place and venue to facilitate the representative of the Engineer to witness and certify such tests. In case any of the material is rejected during such test, the contractor shall pay a penalty of Rs.20, 000/- (Rupees Twenty Thousand Only) for each such failure when attended by the Engineer-in-charge s representative. For the following items, the sample shall be submitted to the Engineer-in-charge and got approved before the material is used for the works. 1) 11KV Horizontal cross arm 2) 2 pin, 3 pin and 4 pin cross arms 3) Anchor rod and turn buckle 4) HT / LT Single top supports 5) TP & DP Set 6) TC Set 7) DTC metering

3 B. TECHNICAL SPECIFICATIONS ELECTRICAL 3 For all other materials, not specifically mentioned above, the test certificate with regard to Type test and Routine tests shall be furnished before the same are used to the works. 2.7 The owner reserves the right of getting any field test conducted on completely assembled equipment at site. 2.8 The contractor is fully responsible for the Equipment / material until the same is handed over to the owner in an operating condition after commissioning. The contractor is fully responsible for the proper maintenance of Equipment / material as well as protection against theft, elements of nature, damages etc., while in his custody as well as after erection until the same is taken over by the owner under due acknowledgement in writing. 2.9 The entire works to be executed under this contract will be in stages & requires obtaining Line Clear Permits from the Engineer-in-charge s representative before taking up the works by the contractor. As such the contractor shall take all mandatory safety precautions for executing the works. 3.0 GENERAL GUIDE LINES FOR WORKS 1) RCC Poles- 9.0 Meters long RCC Poles of 145 Kg working load shall be used for construction of 11 kv lines and LT lines and for Distribution Transformer Centers. RCC Poles- 8.0 Meters long RCC Poles of 115 Kg working load shall be used for stud poles. Poles shall be manufactured as per specification and drawing furnished. 2) Horizontal Cross Arm with HT ST Support- Two pin Horizontal Cross Arms made out of 50 x 50 x 6 mm M.S. angle & HT ST Support made out of 50 x 8 mm MS flat as per detailed specification and drawing furnished shall be used. For 11 kv lines 3) 4 Pin cross arm, 2 pin cross arm and LT single top support-4 Pin cross arm, 2 pin cross arm and LTST support made out of 45 x 45 x 5 mm, 45 x 45 x 5 mm and 50 x 6 mm MS angle respectively, as per detailed specification and drawing furnished shall be used for LT lines. 4) 45 KN disc insulators- For termination of 11 kv lines, only 45 kn dead end Disc insulators as per detailed specification and drawing furnished shall be used 5) DP and TP Structure- For 11 KV lines one Double Pole structure per Km as per detailed specification and drawing furnished shall be used. The Existing 11 kv lines shall have to be tapped off using DP structure. Wherever necessary TP structure may be used where the line crossing is 90º 6) Spiral earth electrode- Metallic fixture on every pole used in 11 kv lines shall be earthed using spiral earth electrode system as per drawing furnished.

4 B. TECHNICAL SPECIFICATIONS ELECTRICAL 4 7) Guy Wire- The GI stay wire used for guy set shall confirm to the specification indicated and the strain insulator for LT line is No 8 and for HT line No 15 as per detailed specification and drawing furnished shall be used. 8) Earthing- All metallic parts of DP structure, supports on either side of road crossings shall be earthed. Three separate earth electrodes made up of 40 mm dia GI pipe, 2.5 Mtr long shall be provided for each transformer center. One of these electrodes shall be connected by 2 independent leads (using GI stay wire) to the Neutral terminal of the transformer. The body of the transformer shall be connected by an independent lead (using 8 SWG G.I wire) to the second electrode. Also, all the metal parts of the TC structure, the operating handle of the GOS, the metering box etc., shall be connected by means of a second independent lead (using 8 SWG G.I wire) by proper looping to the second earth electrode to which the body of the transformer is also connected. The third electrode shall be connected to the potential point of all the 3 lightning arrestors. Details furnished in the drawing. 9) Mounting of Lightning Arrestors- The Lightning arrestors shall be mounted that in the event of bursting, no live parts of the leads, HT or LT or of the arrestor lie within the arcing distance of any conductor to ground. 10) Jumpers at tapping points- Jumpers shall be made in such a way as to give neat appearance & required clearance to earth. The ground clearance and horizontal clearance to the conductor shall confirm to IE rules. 11) Statutory payments: The successful bidder shall make arrangements for inspection of the entire distribution system erected, by Electrical Inspectorate Authority and obtain approval from them. Inspectorate fee and other statutory payment shall borne by the contractor and can be claimed along with the bills duly submission of the receipt by the successful bidders. TECHNICAL SPECIFICATIONS CONTENTS S.No Description 1 9.5/9/8 mtr. long RCC pole 2 Horizontal and Horizontal special 3 pin Cross arm 3 HT & LT single top supports 4 Clamps 5 25/63/100/250 KVA TC set, TP set & DP set 6 45KN disc insulator 7 11 KV pin insulator (shell) 8 11KV GI Pin 9 Stranded GI Stay wire 10 Anchor rod & turn buckle 11 Guy strain insulator 12 Rabbit conductor 13 Bolts & nuts 14 Universal distribution connectors

5 B. TECHNICAL SPECIFICATIONS ELECTRICAL 5 S.No Description 15 11KV /415V, 25, and 250 KVA 50Cys distribution transformer 16 Metal oxide surge Arrestor kv HG fuse unit 18 SOLID CORE INSULATORS kv 200A single break GOS 20 LT fuse kit for DTC 21 Spiral Earth electrode 22 Pipe type earthling 23 LT 2pin & 4pin cross arms kv pin insulators (shells) kv GI Pin 26 No8 Strain insulators 27 GI wire 28 Low tension current transformer 29 Meter box to house meter & CT s TSS-1.0 TECHNICAL SPECIFICATION FOR 9.5/9.0/8.0 M LONG RCC POLE WORKING LOAD OF 150/145/115 KGS. The specification covers manufacture, curing, testing and supply of 9.5, 9.0 and 8.0 mtr long RCC poles, are generally as per drawing enclosed with the specification and are intended to be used on 11 kv over head electric distribution lines. The materials manufactured shall conform strictly to the requirement of relevant INDIAN STANDARDS and latest addition of IS using the best quality of materials and workmanship. The Cement used in the manufacture of RCC Poles shall be of good quality and confirming to the relevant ISS either ordinary or rapid hardening Portland cement conforming to IS: 269. Aggregate used for the manufacture of RCC Poles shall confirm to IS: 383. Reinforcing bars and wires used in the manufacture of RCC Poles shall be as below:- i) Mild steel and medium tensile steel bars and hard drawn steel wire confirming to IS-432/1960. ii) The steel of Tor-50 grade conforming to latest edition of IS: iii) Quality of MS Rounds used for stirrups shall comply with the requirements of IS:226. The reinforcing bars used shall be of required length as per drawing and no joint shall be allowed. All joints and stirrups shall be welded properly. If no welded, the lap length shall not be less than 40 times the diameter of the bars. The cover of concrete over the reinforcement shall be 30mm under normal working conditions and shall not be under any circumstances less than 20mm. The sand shall be of the quality fit for use in RCC works i.e., river sand and sieved and free from alkaline/acidic materials. The ratio of cement concrete shall be 1:2:3 and shall comply with the requirements of IS:456. The standards adopted for various materials manufacture shall be as follows:

6 B. TECHNICAL SPECIFICATIONS ELECTRICAL 6 i) The RCC poles shall conform to the requirement of IS:785/1964. ii) The quality of concrete shall be to the requirements of IS:456/1964. iii) The testing of proto-type poles shall be as per requirements of IS:2905/1966. The RCC Poles shall be manufactured as per the enclosed drawing and as noted below: i) 9.5 M long Poles Drawing No. KEB/CPL/RCP-2/ ii) 9.0 M long Poles Drawing No. KEB/CPL/RCP-2/ iii) 8.0 M long Poles Drawing No. KEB/CPL/RCP-2/ The poles shall take working load of 150 kgs for 9.5mtr. 145 Kgs, for 9.0 mtr, and 115 Kgs for 8.0 mtr, long RCC pole acting at 0.6 M from top with factor of safety of 2.5 respectively and The tests for transverse strength, torsion strength, measurement of cover and uprightness shall be carried out in the presence of a representative of OWNER. 1.0% of the total number of poles ordered and selected at random shall be tested as per the standard referred to above. No payments will be made for the poles, which fail or tested to destruction. Earthing shall be provided for the poles. By having a continuous separate length of SWG GI wire embedded in concrete during manufacture and the ends of wire left projecting from the narrower end of the poles and 150mm below the ground level. The arrangements for termination of the earth wire to the bolt and nut shall be as indicated in the concerned drawing. The G.I. Wire used for embedding shall comply with requirement of IS: 2141/1968. The poles shall be clearly and indelibly marked with the following particulars, during manufacture but before testing at a position so as to be easily seen after erection in position. a) Month and year of manufacture. b) Maker s Sl. No. and marking. c) Purchase order No. and date. d) A line to indicate the depth of planting. e) KRWSSA engraved (letters OWNER). f) Lines to show the level of cross arms. Provisions for holes for fixing the cross arms and other fixtures shall confirm to drawing and/or the construction practice adopted by the KPTCL/ ESCOM. The same shall be got confirmed by the Executive Engineer El., of the Division, before taking up the manufacture and supplies. TSS-2.0 TECHNICAL SPECIFICATION FOR HORIZONTAL CROSS ARMS This Specification provides for the manufacture of Horizontal straight cross arms and Horizontal special 3 pin cross arm for the use in 11 KV distribution lines. The structural steel for the manufacture of cross arm shall be commercial grade angles 50 x 50 x 6 mm and conform to IS:1977 / ST-42 /ST 32. They should take particular care to ensure the hardness of the steel used is as per the said ISS. The material for 11 KV horizontal cross arms should

7 B. TECHNICAL SPECIFICATIONS ELECTRICAL 7 conform to Drg. No. KEB /WS/019 / dtd The cross arms should be painted with two coats of ACB paints after red-oxide primer coat. The cross arm should have voltage grade (11 KV) marked on it. The contractor shall submit a sample and get the approval of the Engineer before taking up the works. The cross arms shall be securely packed to avoid damages during transport. Each horizontal cross arm shall be 980 mm length and weight approx 4.86 Kg / Piece, and Horizontal Special 3 pin cross arm shall be 1980 mm length and weight approx kg/piece as mentioned in the drawings. TSS-3.0 TECHNICAL SPECIFICATION FOR LT & HT SINGLE TOP SUPPORTS This specifications provides for the manufacture of single top supports for using 11 KV & 415 / 240 V lines, manufactured out of structural mild steel- flats, 50 x 8 mm and 50 X 6 mm conform to IS: 1977 / ST-42 /ST-32 commercial quality or latest version thereof. The hardness of the steel flat used shall be as per relevant ISS. The materials shall conform to drawing No. KEB / SIC / WS /019 dt of H.T S.T supports and KEB / Tech / Misc / 241 dt for L.T S.T supports. Each member of the set should be painted with two coats of ACB paint after primer and should have grade marked on it, as HT or LT as the case may be. Each member of the set should be marked with the member identification as mentioned in the drawing The Materials shall be delivered suitably packed to avoid damage during transport. H.T S.T support Kg / piece. L.T. S.T support Kg / piece, as mentioned in drawings. TSS-4.0 SPECIFICATION FOR CLAMPS The specification of RCC clamp provides for the manufacture and supply of clamps for the RCC Poles, for use in distribution lines, fabricated out of 50 x 6mm M.S flat, conforming to commercial quality IS-1977 / SP-42 / ST-32. The hardness of steel should be as per the said I.S.S. The RCC pole clamps shall be manufactured as per the - KEB /SIC/DL/WS-003 dt The clamps shall be painted with two coats of ACB paint after primer. The clamps shall be marked with suitable identification marks on each type of clamps for easy identification. The clamps shall be securely packed so as to avoid damage in transit. The length and weight of clamps is to be as mentioned in the drawings: RCC Pole clamps: A Type 428 mm Kg. TSS-5.0 SPECIFICATION FOR LINE MATERIALS SUCH AS 25/63/100/250 KVA TC SET, TP AND DP SET This specification provides for the manufacture and supply of line materials such as TC sets, TP sets, DP sets, SPMT etc, for use in distribution line of voltage 11 KV / 415V. The structural steel angles and flats for manufacture of the sets shall conform to IS: 1977/ST- 42/ST-32 commercial quality or latest version thereof MS Angles / flats / Channels shall conform to IS hardness of steel, used shall be as per relevant ISS. The necessary bolts and nuts used should conform to IS: 1363 & IS: 1367 of 1967 or latest version thereof. The necessary GI Pipe should be of (A) class and should conform to IAA: 1239 Part-I / 1979 with latest version thereof. Bolts and nuts supplied shall be of the following approved make only i.e., GKW /TATA/ Industrial Fasteners / Pushpa Industries / India steel and wire products / Garge fasteners Madras.

8 B. TECHNICAL SPECIFICATIONS ELECTRICAL 8 i. All materials shall be reasonably straight and free from twists, unless separately mentioned otherwise in the drawing. ii. Cutting may be effected by shearing, flame cutting, the surfaces so cut shall be clear, smooth, free from distortion. iii. Holes in the members shall either be drilled or punched. iv. The length of the bolt shall be adequate. v. The holes to be marked such that edge distance (min) shall be 20mm. Each member of the set is to be marked with the number identification as mentioned in the drawings. Materials shall be delivered suitably packed to avoid damage during transport, in the form of Kit, supplied in plastic cover along with bill of materials and assembly drawings. Each member of the set is to be painted with two coats of good quality red-oxide premier paint. The weight of each number of line materials covered in Specification shall be as mentioned in the drawing excluding bolts and nuts, G.I Pipe and spacers. TSS-6.0 SPECIFICATION FOR 45KN DEAD END DISC INSULATORS 11KV CLASS. This specification covers details of 11KV Class 45KN Disc Insulators for use in 11KV overhead lines in the distribution system. APPLICABLE STANDARDS: IS 2099:198 : Bushing for all voltage above 1000V. IS 2486:1986 : Insulator fitting for OH. Part1, 2, 3&4 : power lines for nominal voltage greater than 1000V. IS 731:1971 : Porcelain insulators for overhead power lines. The porcelain shall be sound, free from defects, thoroughly vitrified and smoothly glazed. Unless otherwise specified, the glaze shall be brown in color. The glaze shall cover all the porcelain parts of insulators except those areas which serve as supports during firing or are left unglazed for the purpose of assembly. The design of insulators shall be shall be such that stresses due to expansion and contractors in any part 6 of the insulator shall not lead to deterioration. The porcelains shall not engage directly with hard metal. Cement used in construction of insulators shall not cause fracture by expansion or loosing by contraction and proper care shall be taken to locate the individual parts correctly during cementing. The cement shall not give rise to chemical reaction with metal fittings and its thickness shall be as uniform as possible. The insulators should be manufactured in automatic temperature controlled kilns to obtain uniform baking and better electrical and mechanical properties TECHNICAL PARTICULARS: I) DESCRIPTION: 1a Product Identification 45 KN DEAD END 1b Product Code IP-03D 2 Type of Insulator (Pin & Cap) 3 Porcelain Disc Diameter mm 255 ±11 4 Unit Spacing mm 235 ± 10

9 B. TECHNICAL SPECIFICATIONS ELECTRICAL 9 5 Coupling DEAD END 6 Creepage Distance (Total) mm 292 (Protected) mm Electro-mechanical Strength KN 45 II) ELECTRICAL CHARACTERISTICS : 1 Power frequency Dry flashover voltage KV 78 2 Power frequency dry withstand voltage KV 70 3 Power Frequency wet flashover voltage KV 45 4 Power frequency wet withstand voltage KV 40 5 Impulse flashover voltage KV (Peak) Impulse withstand voltage KV (Peak) Power frequency puncture voltage KV Visible discharge voltage KV 18 9 RIV at 10 KV KV 50 III) PACKING PARTICULARS: 1 Insulators / Crate Nos. 4/8 2 Gross weight of each crate Kg. 26/52 (Approx.) 3 Net weight of unit insulators Kg Type test reports as per relevant standards shall be furnished along with the tender. Acceptance and routine tests as stipulated in relevant standards shall be carried out in presence of the buyer representative. Each insulator shall be legibly and indelibly marked to show the following: a. Name or trademark of manufacturer. b. Month and year of manufacture. c. Minimum failing load in KN. d. ISI Certificate mark, if any Markings on porcelain shall be printed and shall be applied before firing. All insulators (without fitting) shall be packed in wooden crates suitable for easy but rough handling and acceptable for road/rail transport, where more than one insulator is packed in crate, wooden separators shall be fixed between the insulators to keep individual insulators in position without movement within the crate. All test inspection shall generally be made at the place of manufacturer. The manufacturer shall offer the inspector representing the OWNER all reasonable facilities, without charges, to satisfy him that the materials are manufactured in accordance with this specification. TSS-7.0 TECHNICAL SPECIFICATION FOR 11 KV PIN INSULATORS (SHELL) This specification covers details Porcelain insulators for use on 11KV overhead power lines in the distribution system. Except when in conflicts with the specific requirements of this specification, the insulators shall comply with IS.731 and SI.3188 as amended from time to time.

10 B. TECHNICAL SPECIFICATIONS ELECTRICAL 10 The porcelain shall be sound, free from defects, thoroughly vitrified and smoothly glazed. Unless otherwise specified, the glaze shall be brown in colour. The glaze shall cover all the porcelain parts of insulators except those areas which serve as support during firing or are left unglazed for the purpose of assembly. The design of insulators shall be such that stresses due to expansion and contractors in any part of the insulator shall not lead to deterioration. The porcelains shall not engage directly with hard metal. Cement used in construction of insulators shall not cause fracture by expansion or loosening by contraction and proper care shall be taken to locate the individual parts correctly during cementing. The cement shall not give rise to chemical reaction with metal fittings and its thickness shall be as uniform as possible. The insulators should preferably be manufactured in automatic temperature controlled kilns to obtain uniform baking and better electrical and mechanical properties. TEST VOLTAGES: 1) Highest System Voltage 12 kv (rms) 2) Mechanical Strength of the insulator (minimum failing load) 5 KN ( Kgf.) 3) Wet Power Frequency Voltage withstand Test 35 KV (rms) 4) Power Frequency Puncture Voltage withstand test 105kV (rms) 5) Visible discharge test 9 KV (rms) 6) Impulse Voltage withstand test 75 KV (Peak) 7) Total creep age distance 230 mm. for moderately polluted atmosphere. The insulators shall comply with the tests as per IS: 831. Each insulator shall be legibly and indelibly marked to show the following: a. Name or trade mark of manufacturer. b. Month and year of manufacture. c. Minimum failing load in KN. d. ISI Certificate mark, if any Markings on porcelain shall be printed and shall be applied before firing. All insulators (without fitting) shall be packed in wooden crates suitable for easy but rough handling and acceptable for rail transport, where more than one insulator is packed in crate, wooden separators shall be fixed between the insulators to keep individual insulators in position without movement within the crate. All test inspection shall generally be made at the place of manufacturer. The manufacturer shall afford the inspector representing the Engineer all reasonable facilities, without charges, to satisfy him that the materials are being furnished in accordance with this specification. The Owner has the right to have the tests carried out at its own cost by an independent agency, when considered necessary. TSS-9.0 TECHNICAL SPECIFICATION FOR STRANDED GI STAY WIRE This specification covers for manufacture, testing before dispatch, supply and delivery of Galvanized Stranded Steel Wire. The GI Stranded wire shall comply with the following India Standards with their latest amendments if any.

11 B. TECHNICAL SPECIFICATIONS ELECTRICAL 11 a) I.S.-2141/1979 and the relevant standards indicated there. b) Hot dip galvanized coatings for stranded wire shall conform to IS-4826/1979 and revisions thereof. The GI standard wires covered on this specification are intended for use on the over head power line poles, distribution transformer structures etc. The GI standard wires shall be of 7 / 3.15mm standard size. the finished strand and the individual wires shall be of uniform quality and have the appropriate properties and characteristics as specified in this specification. The wires shall not contain sulphur and phosphorus exceeding 0.060% each. The wire shall be coated with zinc of grade Zn-89-IS:209/1966. The wires shall be of grade-4 having minimum tensile strength70 kg per sq. mm or 800 N/mm 2. The constructional details shall be as specified in Table- A below. The galvanized stay strand shall be of 7 (seven) wires and the wire shall be so stranded together that when an evenly distributed pull is applied at the ends of the completed wire, each strand will take an equal share of the pull. The wires shall be circular and shall be free from scale, irregularities, imperfections, split surface flaws, rough, jagged and imperfect edges. The zinc coating shall be smooth, even and bright. Joints shall be permitted in the individual wires during stranding, but these stranding joints shall not be less than 15 Mrs. Apart in the finished strands. The outer wire of strands shall have a right hand lay. The lay length of wire strands shall be 12 to 18 times the strand diameter. Minimum breaking load:- TABLE A : SINGLE WIRE No. of Wires Dia Min. Tolerance % Min. elongati on (%) Min breaking load (KN/mm 2 ) Length of Lay Min. breaking load (KN/mm 2 ) ±2.5% with a minimum of mm to 18 times the strand diameter Sampling criteria and the tests shall be in accordance with IS A tolerance of (+)/(- ) 2.5% on diameter of wires before stranding shall be permitted. The wires shall be subjected to the following tests before manufacture in accordance with IS: Ductility test and 2. Tolerance on wire diameter. The wires shall be subjected to the following test after completion on accordance with IS: Tensile and elongation tests; percentage elongations of stranded wire shall not be less than 6% and 2. Chemical analysis of sample from each lot. Galvanizing test: - The zinc coating shall conform to heavy coating and number of dips specified in IS: The uniformity of zinc coating shall be tested by the method

12 B. TECHNICAL SPECIFICATIONS ELECTRICAL 12 specified in IS-2633/1964. The wire shall withstand the number of dips as specified in IS as indicated below in Table- B : TABLE- B : WEIGHT OF COATING AND NUMBER OF DIPS-HEAVILY COATED WIRE: Nominal diameter of galvanized wire in mm HARD Weight of coating gms/sq.mtr. No. of dips 1 Min. ½ Min Hard galvanized after drawing without annealing. Each coil shall carry metallic tag, security attached to the inner part of the coil, bearing the following information. a) Manufacture s name or trademark. b) Lot number & coil number. c) Size. d) Construction. e) Tensile designation. f) Lay. g) Coating h) Length i) Mass j) ISI certificate make The wires shall be supplied in Kg coils. The same should be done in accordance with provision of relevant IS. TSS-10.0 TECHNICAL SPECIFICATION FOR ANCHOR ROD AND TURN BUCKLE This specification provides for the manufacture and supply of 1. Anchor rods for use in distribution lines manufactured out of the structural MS Angle iron 65x 65 x 6mm and 12mm dia rounds and Turn buckle for use in distribution lines manufactured out of the structural MS Angle iron 50 x 50 x 6mm and 16mm dia rounds confirming to the commercial grade IS 1977/ST-42/ST-62 round and angles. Hardness of the steel shall be as per relevant ISS. Anchor rod and Turn buckle shall be manufactured as per drawing No. KEB / SIC / DL /022 dt Anchor rod and Turn buckle shall be painted with two coats of ACB paint after primer. Contractor shall submit a sample and get the approval of the OWNER before taking up manufacture. Anchor rod and Turn buckle shall be suitably packed to avoid damage during transport. Total length and weight of the angle iron and rounds is as follows: 1. Anchor rod a. 12mm dia MS rounds-1860mm-1.566kgsper piece b. MS angle 65X65X6mm-300mm, 1.84Kgs per Piece.

13 B. TECHNICAL SPECIFICATIONS ELECTRICAL Turn Buckle as per drawing SPECIFICATION FOR GUY STRAIN INSULATORS This specification covers the supply of 85 x 65 and 140 x 85-mm size guy strain Insulator conforming Designations "A" and "C" Type conforming to IS: 5300 in all respects with latest amendments. The porcelain of which the insulators are made is sound thoroughly vitrified and smoothly glazed. The glaze should not be depended upon for insulation and shall as for as practicable cover all the exposed porcelain parts of the insulator. The design of the insulators shall be such that stresses due to expansion and contraction in any part of the insulator shall not lead to deterioration. The glaze shall be brown in colour. The glaze shall cover the entire porcelain surface parts except those areas that serve as supports during firing or are otherwise required to be left unglazed. The insulators shall have the following electrical and mechanical characteristics. Sl. No. Particulars No. 8 Strain No. 15 Strain Insulator Insulator 1 Designation Type "A" Type "C" 2 Length 90 mm 140 mm 3 Diameter 65 mm 85 mm 4 Cable hole 18 mm 25 mm 5 Minimum failing load 44 kn 88 kn 6 Creepage distance 41 mm 57 mm 7 Dry one minute power frequency withstand voltage 18 KV 27 KV 8 Wet one minute power frequency withstand voltage 8 KV 13 KV 9 Overall dimensions 90x65 mm 140x85 mm 10 Weight of each unit 1.5 Kg 0.45 Kg The manufacturer has to conduct acceptance and routine tests on the specified number of samples as per IS 5300 with its latest revision if any, The tenderer has to furnish the following guaranteed technical particulars of the insulators offered in the following proforma: 1. Maker's name and address 2. Insulator type, make and trade mark, if any 3. Dry flashover voltage 4. Dry withstand voltage 5. Wet flashover voltage 6. Dry power frequency withstand voltage 7. Power frequency puncture voltage 8. Creepage distance 9. Visual discharge voltage 10. Impulse withstand voltage 11. Failing load 12. Other details, if any 13. Packing details

14 B. TECHNICAL SPECIFICATIONS ELECTRICAL 14 TSS-12.0 TECHNICAL SPECIFICATION FOR RABBIT ACSR CONDUCTOR the specification covers manufacture, testing and supply of ACSR conductors. The conductor shall comply in all respects with the latest edition of ISS-298 (PartII) 1976 with its latest amendment. The Aluminum wires used in the manufacture of the conductor shall be of the highest electrical quality and free from scratches, die marks and other surface imperfections. They shall be reinforced with a central core of galvanized high tensile steel wire having negligible sulphur and phosphorous contents. The steel wire shall not be subject to any heat treatment after being galvanized. The zinc coating of steel wires shall be smooth and of uniform thickness. There shall be no bare spots owing to adherence of scales or other causes. Joints in the individual Aluminium, wires are permitted but no two such joints shall be within 15 meters apart in the complete stranded conductors. There should be no joints in the galvanized steel wire except those made in the base rod or wire before final drawing forming the core of steel reinforced Aluminium. The resistance of the individual Aluminium wire shall be determined separately before stranding by means of standard tests on sample wires. The ACSR conductor size and standard lengths shall be as per IS 398 (Part-II) 1976 with its latest amendments and as indicated in the schedule of material specification. The Aluminium wire and galvanized steel wire for the standard construction of conductors have diameter specified as per Tables 1&2 Section of IS 398 (Part-II). Code Name of Conductor Nominal Aluminum Area Dia of wires in mm Aluminu m Steel Sectional Area of Aluminum (mm 2 ) Total Sectional Area (mm 2 ) Extend calculated Resistance at Appx. Calculated breaking load in KN Appx. Over all dia (mm 2 ) Std, length in Mtrs. App. Mass Kg./Km. Rabbit 50 Sq.mm 6/3.35 1/ The Lay ratio (Ratio of the axial length of a complete turn of the helix formed by the individual wire in a standard conductor to the external diameter of the helix.) shall be as below. Number of Wires Ratio of Lay ratio for Aluminium Lay ratio for steel core Aluminum outside layer wire dia to Aluminum Steel Steel wire Minimum Maximum Minimum Maximum dia The test certificates shall cover all tests on required number of samples as stipulated in clause 12.1 of ISS. (Part-II) 1976 with latest amendments if any.

15 B. TECHNICAL SPECIFICATIONS ELECTRICAL 15 Test certificates in triplicate for tests on the finished ACSR conductor shall be submitted. The suppliers shall furnish along with RCs, the number of pieces of conductor in each reel and the length of individual pieces. All tests as detailed in clause 12 of ISS-398 (Part-II) 1976 with its latest amendments shall be carried out on conductors covered by this specification and shall be submitted by the contractor for purchasers approval within four weeks of the acceptance of the letter of intent of the purchaser. No change in the schedule of tests, unless desired by the purchaser shall be subsequently made by the contractor or his sub-contractors of the manufacturers without prior consent of the purchaser. The purchaser may at any time call for any tests that are laid down in the specification as optional tests. The contractor shall arrange to carry out such tests expeditiously and at his own cost. The certificates for such optional tests shall be submitted to the purchaser for approval. The contractor shall notify the purchaser, at least fifteen days in advance, the time of manufacture so that inspection of materials during manufacture and or witnessing of the tests can be arranged. If the purchaser waives inspection he will advice the contractor accordingly. Inspection shall also include method of packing and stacking of finished materials in the works. Drawing of the reels/drums shall be enclosed with tenders. The ACSR conductor reels shall be of dimensions approved by the purchaser and made of seasoned wood sufficiently strong and in sound condition to ensure that the reels shall reach the site intact with lagging end free from damage due to transport hazards by rail and over land. These reels shall conform to IS 1778/1961 with latest amendments if any. The standard length of the ACSR conductor shall be as per schedule of materials specification. Longer lengths are acceptable. The contractor shall submit in duplicate detailed packing specification for the conductors for the purchasers approval at least fifteen days prior to commencement of dispatch. Finally approved specification shall be furnished along with the dispatch documents. REEL OR DRUM SHALL BEAR THE FOLLOWING INFORMATION a) Reel or drum number b) Size and description of contents c) Length of each piece of conductor (on reels) d) No. of pieces in each package/reel e) Gross weight f) Net weight g) Purchase order No. & Date h) Place and designation of consignee The above details shall be legibly and indelibly marked. TSS-13 TECHNICAL SPECIFICATION FOR MILD STEEL BLACK GRADE B BOLTS AND NUTS

16 B. TECHNICAL SPECIFICATIONS ELECTRICAL 16 The specification covers manufacture and supply of mild steel hexagonal black grade B bolts and nuts, manufactured from 4.6 / 4.8 grade material as per ISS 1363 and its latest revisions thereof. The bolts and nuts shall be free from dirt, dust and burns, cleanly finished, so that it shall be possible to turn the nuts freely with hand, but the ply shall be minimum. The bolts length less than 65mm shall be fully threaded & above 65mm must be threaded to the extent specified in IS:1363 and its latest revisions thereof. Tests shall be carried out in accordance with the relevant clauses of IS 1363 and test certificates thereon shall be submitted to this office and dispatches shall not be made till these test certificates are approved. The bolts and nuts shall be supplied duly packed in heavy new gunny bags and the weight of the individual bag shall not exceed 50 Kgs. TSS-14 SPECIFICATION OF UNIVERSAL DISTRIBUTION CONNECTORS 1.0 The wedge type Universal Distribution Connector will consist of locking insert made from a special aluminum alloy of high ductility and electrical conductivity, which can be easily removed by screw driver. When connected, this will provide a tenable electrical and mechanical connection for solid, stranded or compressed conductor combinations including AAC, AAC & ACSR. The typical installation procedure of wedge type connectors has been illustrated as Annexure The dimension for the wedge shall be manufactured to close tolerances to ensure repeatability and reliability of the connection. 3.0 All sharp edges and burns shall be removed. 4.0 The wedges shall be furnished to achieve optimum surface roughness for electrical contact. 5.0 The wedge connector shall meet the current cycle test requirement as per ANSI. C Class AA. When connected as specified, samples shall indicate electrical stability for terminated connectors. The resistance of connections, when measured as specified shall be stable throughout the tests. The samples shall be tested to 500 on / off current cycles with the control conductor raised between 175 o C to 180 o C above ambient. 6.0 The wedge connector shall meet the mechanical requirements as per ANSI. C Class 3, minimum tension. When tested as specified or 5% of the rated cable strength of the weaker conductor. 7.0 The wedge connector shall meet the following thermal shock/salt spray test. a) 150 o C b) 15 O o C, water immediately from the oven c) o C, d) hours at room temperature 8.0 Salt spray corrosion, samples shall be subject to a 30 days salt spray, corrosion test. Each daily exposure shall consist of : a) 15 hours in 5% salt spray atmosphere b) 1 hour in e drying 100 o C c) 8 hours at room temperature

17 B. TECHNICAL SPECIFICATIONS ELECTRICAL Supplier shall also shall supply marine atmospheric environmental study on the performance of their products, minimum 4 years duration. TSS-15 SPECIFICATION FOR 11KV /O.433KV, CLASS DISTRIBUTIONTRANSFORMERS OF RATING 25 KVA/63KVA/I00KVA/250KVA AND 500KVA SCOPE: The specification covers manufacture, testing at works and supply of 3 phase, 50Hz, core type oil immersed self cooled Distribution Transformers conforming to IS: 1180 and IS: 2026 of 1977 as amended from time to time and REC specifications. One set of drawings showing size, Shape of tank, Core and windings, Radiators etc., for all the capacity of Transformers and an internal clearance drawings are furnished by the Corporation. The transformers shall be manufactured strictly as per specifications and enclosed drawings without any deviations STANDARDS: The applicable standards for distribution transformers including various accessories are specified here below: i. Colours for Ready mixed paints &. Enamels - IS: 5/1994 ii. Ready mixed paint, brushing, Zinc chrome, priming - IS: 104/1979 iii. New Insulating oils - IS:335/1993 iv. Methods for testing of Steel Sheets for Magnetic Circuits of Electrical apparatus - IS: 649/1997 v. Outdoor type three Phase distribution transformers - IS: 1180 /1989 Up to and including 100KVA, 11 KV class (Part I &.II) vi. Solid press Boards for Electrical purposes - IS: 1576/1992 vii. Power Transformers - IS: 2026/1977 (Parts 1 to 5) viii. Bushings for alternating voltages above 1000 volts - IS: 2099/1986 ix. Determination of water content by Karl Fischer Method-Test method - IS: 2362/1993

18 B. TECHNICAL SPECIFICATIONS ELECTRICAL 18 x. Paper covered Aluminum conductors - IS: 6162/1971 (Part I & II) xi. Rectangular conductors for Electrical Machines - IS: 6160/1971 xii. Dimensions for Porcelain Transformer Bushing Dimensions for use in normal - IS: 3347 And lightly polluted atmosphere (Part I - IV) xiii. Electric Power Connectors - IS: 5561/1970 xiv. Method of test for specific resistance (Resistivity) of Electrical insulating liquids - IS: 6103/1971 xv. Method of test for power factor and Dielectric Constant of electrical Insulating liquids - IS: 6262/1971 xvi. Method for Determination of electric strength of insulating oils - IS:6792/1992 xvii Code of practice for selection Installation, - IS: 10028/1985 Maintenance of Transformers (Part I to III) xix. CBIP Manual xx. REC Specification xxi. REC construction standards K.5 (Capitalization of losses) - Section B & C - No.2 - K5 (R-1993) SYSTEM DETAILS: The transformers shall be suitable for outdoor installation with 3 Phase, 50 Hz, 11 kv system in which the neutral is effectively earthed and the same shall be suitable for service under fluctuations in supply voltage up to 12% permissible under Indian Electricity Rules and the frequency variation of -5% and +2% (47.5Hz to 51.0Hz) LIMATIC CONDITIONS: The material used in the construction of the Distribution transformers shall be suitable for use under the following climatic conditions. a. Ambient Air Temperature - 5 C to 50 C: b. Relative Humidity - 0 to 100% c. Altitude - 0 to 100 Meters RATINGS: Primary Voltage - 11 KV - 3Phase

19 B. TECHNICAL SPECIFICATIONS ELECTRICAL 19 Secondary Voltage Volts. The winding of the transformers shall be connected in delta on the primary side and in star on the secondary side. The neutral of the LT windings shall be brought out to a separate terminal. The vector group shall be Dyn.l TECHNICAL PARAMETERS: a) Percentage Impedance: The Percentage Impedance shall be 4.5% for transformers up to 100KVA and 5% for transformers of 250KVA and 500KVA with tolerance as per IS: b) Temperature rise: The temperature rise for top oil over should be 45 C max (measured by thermometer as per IS: 2026) over the ambient temperature. c) The temperature rise for windings shall not exceed 50 C Max. (Measured by resistance in accordance with IS: 2026) over the ambient temperature. d) No Load Voltage Ratio: The No Load Voltage ratio shall be 11000/ V, for all capacities of distribution transformers at normal tap Capitalization of Losses: The No load and load losses indicated under clause li (losses and Impedance) in the Technical specification are those maximum allowable losses, and there will not be any positive tolerance. The losses mentioned are only indicative and maximum permissible. For capitalization the guaranteed loss values quoted by the tenderer shall be considered. Capitalized cost of transformer - I.C x wi x wc. Where: I. C - price quoted by the tenderer Wi - No load loss quoted by the tenderer in KW. Wc - Load loss at rated voltage in KW DESIGN & CONSTRUCTION CORE a) The core shall be of high grade CRGO steel sheet of M4 grade or superior to that having low loss and non ageing grain oriented, coated with hot oil proof insulation, bolted together to the frames firmly to prevent vibration or noise. All core clamping bolts shall be effectively insulated The complete design of core must ensure permanency of the core losses with continuous working of the transformers. The value of the flux density shall not be more than 1.7 tesla at 50 HZ. The construction of core, internal clearances minimum effective area of cross

20 B. TECHNICAL SPECIFICATIONS ELECTRICAL 20 section, minimum Nos. of core steps etc., shall be strictly as per the drawings enclosed. b) The transformers core shall not be saturated for any value of V/F ratio to the extent of 112.5% of the rated value of V/F ratio i.e., 11kV/50Hz. (Due to combined effect of voltage and frequency) upto 12.5% without injurious heating at full load conditions the core shall not be saturated. The Bidder shall furnish necessary design data in support of this condition c) The maximum thickness of core laminations shall not exceed 0.3mm. Further the lamination sheets used for top yoke, bottom yoke etc., shall be of single piece. d) No load current, shall be measured by energizing the transformers at 433 volts 50 C/S on the secondary for distribution transformers. Increase of voltage by 10% shall not increase the no load current disproportionately high. Test for magnetic balance by connecting the LV phase by phase to rated phase voltage and measurement of an, bn, cn, voltage shall be carried out. The no load current shall not exceed 2% in respect of 250KVA and 500KVA Transformers and 4 to 5% in respect of 100KVA and below distribution transformers at rated voltage and frequency. The minimum (1) Effective core area (2) Number of core steps (3) Internal clearance Shall be as per the specification and drawings as indicated in the drawings for each capacity. Minimum effective cross sectional area of the core to be provided are as follows: 1) 25KVA sq. cm. 2) 63KVA sq. cm. 3) 100KVA sq. cm. 4) 250KVA sq. cm. 5) 500KVA sq. cm. Note: If the manufacturer uses the better quality CRGO steel for the core the manufacturer has to furnish the area of cross section of the core along with the design details. e) The unbalance current in the neutral shall not be more than 2% of the rated current CORE CLAMPING: 1. M.S. Channel 125 x 65mm for 500KVA, 100x50mm for 250 KVA 75 x 40mm for 100 KVA and below transformers on top and bottom shall be used for clamping the core. 2. Nos. of 12mm high tensile vertical bolts in parallel in each side shall be provided. The size of the Bolts to be provided in parallel are as follows:

21 B. TECHNICAL SPECIFICATIONS ELECTRICAL 21 a. 25, 63, 100KVA - 2 Nos. of 12mm High Tensile Bolts b. 250 KVA - 2 Nos. of 16mm High Tensile Bolts TIE BOLTS: Four horizontal tie rods (or high tensile steel) of 12mm dia for transformers up to l00kva, 16mm for 250KVA and 20mm for 500KVA to be used. Rods to be effectively insulated with kraft paper tube of thickness 1.5mm. i) All top and bottom Yoke nuts bolts and tie rods shall be painted with oil and corrosion resistant paint before use. ii) Channel - (top yoke) on LV side to be reinforced at equidistance if hole cutting is done to avoid bending of channel. iii) The flat provided at the core shall be as per the drawings enclosed and shall not be cut through the length. iv) Tie rods shall be effectively earthed. v) Drawing of the building of the core shall be got approved before start of the work WINDINGS: a) Material- Double layer paper covered Aluminium conductor shall be used. b) The nominal HV winding cross section shall be as follows: SL. No. Rating 1 25KVA Sq.mm. 2 63KVA Sq.mm KVA Sq.mm KVA Sq.mm KVA Sq.mm. c) The nominal LV winding cross section shall be as follows: SL. No. Rating 1 25KVA Sq.mm. 2 63KVA Sq.mm KVA Sq.mm KVA Sq.mm KVA Sq.mm. d) LV winding shall be in even layers e) The neutral formation shall be at top LOSSES & IMPEDANCE:

22 B. TECHNICAL SPECIFICATIONS ELECTRICAL 22 The losses and impedance for various ratings of transformers of 11KV class shall be within the permissible limits. These losses are the maximum permissible. Rating (KVA) No load loss watts (Max.) Full load loss (watts) (Max.) Impedance % (subject to tolerance as per IS:2026) INSULATION, INSULATION MATERIAL & CLEARANCES: a) Press board blocks at top and bottom of each coil assembly shall be provided. There must be at least 4 blocks per phase/coil of each of thickness of 30mm. Core wrapper shall be of minimum of 1mm thick. The channel at phase barrier board shall be of 2mm thick press board. The tie rod insulation kraft paper shall be of thickness 1mm. Between HV and LV windings addition press Board cylinder of at least 2mm in addition to spacers shall also be provided. b) No. of vertical/axial wedges up to 100 KVA minimum 18 Nos. and for 250 KVA &. 500KVA - 12 Nos. shall be provided depending upon the capacity of transformers between LV and HV windings and equispaced around LV. The wedge shall be minimum 6.5mm thick and 8-12mm wide. c) The inter layer insulation shall be provided between HV windings layers depending on the design. The details shall be furnished. d) The Neutral connection of LT winding shall be formed using aluminium strip of same size as that of 'S' type link of size 25x3mm. Aluminium strip for 25/63/l00 KVA and 40x5mm for 250KVA and 70x5 mm for 500KVA transformers. e) The delta formation of HV winding shall be made using copper jumper leads of size 1.6mm dia. for 25/63/100KVA, 2.65 mm for 250KVA and 3.75 mm for 500KVA transformers. The leads shall be enclosed in Kraft insulated paper tube. f) Double paper covering shall be used for winding insulation both for HV & LV windings. Either performed corrugated cylindrical boards or cylindrical compressed boards with spacers shall be provided between HV & LV windings. Press board of type - D IS: 1576 to be used for top and bottom yoke insulation. The electrical grade insulating paper shall be of Triveni / Ballarpur or equivalent make subject to approval of BESCOM. Press boards used shall be of M/s. Senapathi whitely or M/s. Raman Boards or equivalent make subject to approval of BESCOM.