REPAIR / MAINT OF HT CABLE, SWITCH GEAR, TRANSFORMER AND OTHER EQUIPMENTS UPTO 11 KV AT 4 AFSB VARANSI UNDER GE (AF) GORAKHPUR

Amount

Excavating in trenches, not exceeding. 1.5metre wide and not exceeding 1.5metre deep and getting out in soft / loosecomplete all as specified and directed by Engineer-in-Charge.

Returning filling in foundation / trenches including spreading leveling, watering and well ramming in layers not exceeding 25cm thick in soil complete all as specified and directed by Engineer-in-Charge.

Removal of surplus excavated material to a distance n.exc. 50 metre and depositing where directed at a level n.exc. 1.5 metre above starting point complete all as specified and directed by Engineer-in-Charge.

Supply and spreading clean and dry screened sand (unwashed) in trenches around the cable for cushioning complete all as specified and directed by Engineer-in-Charge. Note :- Punned thickness shall be measured.

Laying only in trenches dry well burnt bricks obtained in protections of cable laid flat perpendicular to the direction of cable over sand cushioning for protection of cable complete all as specified and directed.

Supply & fixing 80mm dia GI tubing light grade, on poles, under floors, road crossing etc includng all fittings and taking out old unserviceable rusted GI pipe complete all as specified and as directed by Engr-in-Charge.

M&L for replacement of phase indication light LED type for panel in three colours (R,Y,B) complete all as specified and dirtected.

Supply and fix in replacement space heater strip type of cap 60 W 230 V AC installed in cubicle box 11 KV VCB, operated with controlling tumbles and thermostat complete all as specified and directed.

Material and labour for danger Notice board , HT, 11000 volts , of size 25 Cm X 20 Cm, 1.6 mm thick, mild steel sheet , vitreous, enameled white with letters , figures and conventional skull and bones in signal red colour and fixed with clamps, bolts, nuts of approved size complete all as specified and directed by Engineer-in-Charge.

Material and labour for Lightning Arrestor , HT, 11000 volts, expulsion type,complete with all fittings, transmission class, discahrge capacity 65 Kilo Amps complete all as specified and directed by Engineer-in-Charge.

S&F vaccume interuptor of VCB 11 KV as per existing size and make including taking down old/unsv item complete all as specified and directed. Make :- Crompton & Greaves or equivalent.

Supply and replacement of spring charging motor as per existing sample for VCB of make- Crompton Greaves complete all as specified and directed.

M&L for filteration and centrifuging of transformer oil ,complete all as specified and directed. Note :- Centrifuging machine to be arranged by contractor. BDV of test to be noted before and after centrifuging. Centrifuging and cleaning will be carried on until BDV of 50KV with 2.5mm gap reached. Heaters not less than 5KW should be used. Centrifuging will be done while running of transformer.

Supply and filling of transformer oil EHV as per IS 335 of 1993 Part II. Note :- (i) Oil shall be brought in the manufacture sealed contrainer (drum) and shall be kept in safe custody of Engineer-in-Charge. (ii) Contractor shall hand over the purchase voucher and manufacturer's test certificate to the engineer in charge. (iii) Di-electric strength shall not be less than 60 KV AT 2.5 MM GAP

Replacement of silica gel breather assembly including silica gel of transformer 11/0.433 KV of capacity 250-400 KVA complete all as specified and directed.

Supply & replacement of HT bush Insulator complete with rod as per existing material & size and nut suitable for indoor/outdoor type transformer of 250 KVA to 400 KVA capacity complete all as specified and directed.

Supply & replacement of LT bushing with leather gasket Insulator complete with rod as per existing material & size and nut suitable for indoor/outdoor type transformer of 250 KVA to 400 KVA capacity complete all as specified and directed.

Material and Labour for caliberation of VCB, (Checking of all connections and mechanism) cleaning servicing overhauling,testing complete of 3 phase 11 KV vaccum circuit breakers any make / type as mentioned below :- (a) Taking out incoming and outgoing HT 11 KV 3 core cables from the electric system and checking CTs 03 Nos of each VCB for insulation and saturation calibrating with the help of primary injection & testing kit for primary triping system in presence of Engr-in-Charge/rep ofEngr-in-Charge and reconnecting the incoming and outgoing HT cables ,complete all as specified and directed. (b) Inspecting, servicing and testing all connections of control wiring availability of proper D.C. supply,incoming and outgoing connections and tightening them,cleaning the contacts and terminal with CTC solution and using the blower for dusting incl replacement of faulty control fuses,indication lamp & testing for satisfactory operation raising and lowering mechanism in presense of Engr-in-Charge, complete all as specified and directed. (c) Taking out IDMT over current relay 01 Nos and earth fault relay 01 No from the 11KV VCB (2 Nos In each) and calibrating the relays with the help of secondary injection kit and proper setting of relays and refixing back in existing position testing of proper tripping system in presence of Engr-in-Charge complete all as specified and directed. (d) Taking out incoming and outgoing HT 11 KV 3 core cables from the electric system and checking PT 11 KV/110V of each VCB for insulation and accuracy and calibrating the same in presence of Engr-in-Charge/rep of Engr-in-Charge and reconnecting the incoming and outgoing HT cables complete all as specified and directed. (e) Taking out trolly mechanism of VCB 11 KV for checking all mechanical parts,dismantling and replacing defective parts,checking and readjustment of all moving parts, springs, bearings, greasing all moving parts complete all as specified and directed. NOTE : (i) All the instruments,primary and secondary injection kit and T&P required for the above job shall be arranged by the contractor at site and cost of the same shall deemed to be included in the above rates. (ii) All the test record shall be mentained and signed by the testing engineer,contractor and Engineer-in-Charge . (iii) The above work shall be performed by HT expert/ engineer.

M&L for painting of transformer capacity upto 250 to 400 KVA with two coats with synthetic enamel paint with spray gun over a coat of red oxide primer including filling putty in cavaties at site complete incl surface preparation complete all as specified and directed.

M&L for maintenance of 2 pole structure and taking out all old connection/jumpers and fixing fresh jumpers with proper lugs nut/bolts and tightening all incoming and outgoing connection, properly winging with conductor including servicing/greasing of existing GODs and testing for smooth operation and proper alingment of contacts including replacement of any part of fixed/moving contact complete all as specified and directed.

M&L painting of two pole structure of 11m steel poles with cross arms, bracings, clamps of any length and shape for HT power supply upto 11 KV with two coat of aluminium paint including preparation of the existing surface including marking pole numbers in a 15cm dia yellow circle & marking three black & two yellow bands width 30cm by fluorescent paint,from bottom of pole above coping to 1.5 mtr height,complete all as specified and directed.

Supply, laying & testing cross linked polyethylene insulated (XLPE) galvanised steel strip armoured cable with aluminum conductor, 11 KV `E’, of cross sectional area 95 Sqmm, three core (IS-7098) in trenches/through pipes/ducts or on poles at crossing of OH lines of MES and road crossing including taking out of old Cable complete all as specified and directed by Engineer-in-Charge. Note :- (i) Excavation, earthwork, cable protection cover, cable joint, sand cushioning shall be measured and paid for separately under respective item of this schedule. (ii) Old cable, cable joint, brick cover, pipe etc shall be contractor property and necessary amount as per schedule of credit shall be deducted from contractor's due payments.

Supply, laying & testing cross linked polyethylene insulated (XLPE) galvanised steel strip armoured cable with aluminum conductor, 11 KV `E’, of cross sectional area 120 Sqmm, three core (IS-7098) in trenches/through pipes/ducts or on poles at crossing of OH lines of MES and road crossing including taking out of old Cable complete all as specified and directed by Engineer-in-Charge. Note :- (i) Excavation, earthwork, cable protection cover, cable joint, sand cushioning shall be measured and paid for separately under respective item of this schedule. (ii) Old cable, cable joint, brick cover, pipe etc shall be contractor property and necessary amount as per schedule of credit shall be deducted from contractor's due payments.

Supply, laying, jointing & testing of underground LT cables XLPE insulated, PVC sheathed, Aluminimum conductors, multistranded, armoured heavy duty 1100 Volt grade cross sectional area 240 Sqmm 3.5 core laid in trenches/ducts/along poles/through pipe under road etc with new copper lugs complete all as specified and directed by Engr-in-Charge. Note :- Excavation, earth work, sand cushioning, protection cover and pipe shall be measured and paid for separately under respective items of this schedule.

Material and labour for cable jointing kit for 11 KV (earthed) heat shrinkable, indoor termination joint suitable for cross sectional area 95 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories including cutting of old cable complete all as specified and directed by Engineer-in-Charge.

Material and labour cable jointing kit for 11 KV (earthed) heat shrinkable, out door termination suitable for cross sectional area 95 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories complete all as specified and directed by Engineer-in-Charge.

Material and labour cable jointing kit for 11 KV (earthed) heat shrinkable, in door termination suitable for cross sectional area 120 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories complete all as specified and directed by Engineer-in-Charge.

Material and labour cable jointing kit for 11 KV (earthed) heat shrinkable,straight through joint suitable for cross sectional area 120 Sqmm, 3 core aluminium conductor XLPE Cable including jointing material and accessories complete all as specified and directed by Engineer-in-Charge.

Material and labour Earthing complete with galvanised steel earth plate electrode 600x600x6mm thick directly burried in ground (earth pit not less than 2.25 m deep below ground level) with top edge of earth plate not less than 1.5metre below the ground level connected to GI wire 4 mm dia by means of bolts nuts check nuts and washers of galvanised iron at 2 points & GI pipe 15 mm bore medium grade for protection of earth wire, GI pipe 20 mm bore medium grade for watering, PCC chamber 1:3:6 (type C-1) using 20mm graded stone aggregate, funnel with wire mesh, 50 mm thick cover of RCC 1:2:4 type B-1 using 20mm graded stone aggregate reinforced with 8 mm MS bars at 150 mm centre to centre both ways, CI frame and charcoal dust and common salt, all as shown in electrical plate No. 3 of MES SSR part-I and making test point as specified including excavation & earth work in any type of soil and connecting the earthing to an earthing point/equipment as specified and directed & testing on completion. NOTES : (i) The concrete pit shall be made in PCC 1:2:4 type B-1, using 20mm graded crushed stone aggregate 40mm thick precast cover slab of RCC (1:2:4), type B-1, using 20mm graded crushed stone aggregate with suitable MS handle in lieu of CI cover. (ii) Item includes the cost of 7.5 metre GI pipe for protection of earth strip. Any variation in length shall be adjusted through deviation order (iii) Items includes cost of 7.5 metre earth lead strip. Any variation in length shall be adjusted through deviation order. (iv) Earth electrode shall be surrounded by adequate quantity of charcoal dust and salt to a packed thickness of 15 cm on all sides

M/S UJJAWAL ENTERPRISES