REPAIR MAINT OF HT CABLE SWITCH GEAR TRANSFORMER AND OTHER EQMPT UPTO 11KV AT 4 AFSB VARANASI UNDER AF STATION GORAKHPUR

Amount

Excavation in trenches n.exc. 1.5 m deep and n.exc.1.5 m wide in soft /loose soil and getting out soft/loose soil for laying of cable complete all as specified and directed.

Supply & laying sand cushioning for cable protection in trenches 8 cm before laying cable and 15 cm thick over the cable complete all as specified and ditected. Note: Sand cushioning thickness (8 cm+15 cm=23 cm) are punned thickness and only Punned thickness will be measured and paid.

Supply & laying brick for protection of cable sub class 'B' laid dry flat across the cable with width equal to the length of whole bricks complete all as specified and ditected.

Returning filling in soft / loose soil, including spreading leveling watering and well ramming in layers n. exc. 25 cm complete all as specified and directed.

Removal surplus soft/loose soil at a distance n. exc. 50 m and deposited where directed at a lavel not exc. 1.50 m above the starting point complete all as specified and directed.

M & L GI pipe 40 mm bore light grade fixed on pole/under road/on wall for protection of cable including all fittings complete all as specified and directed.

M & L GI pipe 50 mm bore light grade fixed on pole/under road/on wall for protection of cable including all fittings complete all as specified and directed.

M & L GI pipe 80 mm bore light grade fixed on pole/under road/on wall for protection of cable including all fittings complete all as specified and directed.

Supply & Laying in replacement in pipes/ ducts/ poles/ trenches/ under floor/ under road XLPE insulated cable screened PVC bedded galvanised steel strip armoured,electric power cable heavy duty with aluminium conductor 11000 Volt grade (Earthed) cross section area 95 Sq.mm 3 core complete all as specified and directed. Note- Excavation and earth work will be measured and paid seperately under relevant item. )

All as per item No. 9 above but size 120 Sq.mm 3 core.

Supply & Laying in replacement in trenches/on pole/duct XLPE insulated, armoured heavy duty electric cable with aluminium conductor 1100 volts grade, cross sectional area 16 Sq.mm 4 core complete all as specified and directed. ( Note- Excavation and earth work will be measured and paid seperately under relevant item. )

All as per item No. 11 above but size 120 Sq.mm 3.5 core.

All as per item No. 11 above but size 240 Sq. mm 3.5 core.

All as per item No. 11 above but size 400 Sq. mm 3.5 core.

M&L for cable jointing kit for 11 KV (Earthed) grade cable for indoor termination cold shrink type joint complete with jointing material and accessories suitable for XLPE armoured aluminium conductor cable of size for 95 Sq.mm 3 core complete all as specified and directed.

M&L for cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination cold shrink type joint complete with jointing material and accessories suitable for XLPE armoured aluminium conductor cable of size for 95 Sq.mm 3 core complete all as specified and directed.

M&L for cable jointing kit for 11 KV (earthed) grade cable for indoor termination heat shrink type joint complete with jointing material and accessories suitable for XLPE armoured aluminium conductor cable of size upto 120 Sq.mm 3 core complete all as specified and directed.

M&L for cable jointing kit for 11 KV earthed grade cable straight through heat shrink type joint complete with jointing material and accessories suitable for XLPE armoured aluminium conductor cable of size upto 120 Sq.mm 3 core complete all as specified and directed.

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.

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 for as per existing VCB complete all as specified and directed. make- Crompton Greaves

M & L for caliberation of VCB, CHECKING (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 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.

M&L for transformer oil for top up in transformer complete all as specified and directed. Note : Sealed container only will be brought at site with minimum BDV 45 KV complete all as specified and directed. Make : Transol, Power, Savita.

Supply & Filling in replacement of silica gel breather assembly with silica gel crystal of transformer 11/0.433 KV of capacity 250-400 KVA complete all as specified and directed.

Supply & Fixing in 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 & Fixing in 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.

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 and fixing in replacement of lightning arrestor suitable for 11 KV grade,expulsion type, complete with all fitting transmission class for outdoor discharge capacity 65KA, complete all as specified and directed.

M&L in replacement danger notice plate for HT 25cm x 20cm x 1.5mm thick mild steel sheet,vitreous enameled white with letters,figures and conventional skull and bones in signal red colour and fixed with MS clamps,bolts and nuts, complete all as specified and directed.

S & F in replacement of ACB 4 pole 415 Volt, 50 Hz, 630 Amps ,manual drawout type with microprocessor release complete all as specified and directed.

S & F in replacement of MCCB 4 pole 415 Volt, 50 Hz, 400 Amps with breaking capacity 36 KA adjustable type complete all as specified and directed.

S & F in replacement of MCCB 4 pole 415 Volt, 50 Hz, 250 Amps with breaking capacity 36 KA adjustable type complete all as specified and directed.

S & F in replacement of MCCB 4 pole 415 Volt, 50 Hz, 200 Amps with breaking capacity 36 KA adjustable type complete all as specified and directed.

S & F in repalacement on load changeover switch I-O-II 3 phase & neutral,415 V, 50 Hz, 630 A complete all as specified and directed. Make HPL / Havells/ Indoasian .

M&L for replacement of power contactor 4 pole ,415 volts, 700 amps coil operating voltage 230 Volt AC, Make-INDOASIAN / L & T model MCX-46 or equivalent

Supply, erecting and fixing in true vertical position steel tubular swaged pole 9.0 Mtr long type (410 SP -22) conforming to IS 2713 part I & III - 1980 complete with cast iron base plate, pole cap, mild steel, bolts, nuts and screws, welded and reduced section and longitudinal weld seam throughtout entire length of pole including two coats of black bituminous paint throughtout internally and externally upto planting depth and remaining exterior portion of pole with two coats of aluminium paint over a coat of red oxide primer complete including transporting the poles to plating & providing three bends/strap with paint red signal/post office colour 300 mm apart from plinth block & numbering of poles complete and including taking down pole all as specified and directed and including foundation with the following : (a) Excavation in post holes in any type of soil , returning filling, well ramming and disposal of surplus soil to a distance not exceeding 50 mtrs from the starting point. (b) PCC (1:3:6 ) type C2 using 40 mm graded stone aggregate as in foundation. (c) PCC (1:2:4) type B-1 using 20 mm graded stone aggregate as in coping including necessary form work.

Disconnecting of all electrical connection and opening of Automatic Servo voltage stabilizer, three phase, balanced load 300-480 volts and derive volts 400-440 volts, + 1.5 Volts, oil cooled, indoor type of capacity 400 KVA for repair /servicing and cleaning of parts and repairing the faults, re-assembling after replacement of following unserviceable/defective, worn out parts with new parts of same make / type / capacity as per OEM, reassembling , commissioning and testing on load complete all as specified and directed. Make of Existing Transformer- Sinetrac Note:- Old unserviceable parts to be replaced (including replacement cost) will be measured and paid seperately under relevant item No. 42.01 to 42.12

S & F in replacement Elecronic cards (PCB) complete all as specified and directed.

S & F in replacement Dimmer complete all as specified and directed.

S & F in replacement Motor 10 Kg .cm torque complete all as specified and directed.

S & F in replacement Gear and dimmer arms complete all as specified and directed.

S & F in replacement RC network circuit for motor complete all as specified and directed.

S & F in replacement Protection alarm circuit incorporation with features of high & low voltage,overload, single phasing ,phase reversal protection etc.

S & F in replacement Isolator terminals complete all as specified and directed.

S & F in replacement Sensing trigger transformer complete all as specified and directed.

S & F in replacement Control switch complete all as specified and directed.

S & F in replacement By pass changeover switch of capacity 630 Amps 4 pole complete all as specified and directed.

M&L for painting of Automatic Servo voltage stabilizer, three phase, indoor type of capacity 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 incl old surface preparation complete all as specified and directed.

Dismantling of Existing old earthing and M & L for new earthing complete with galvanised steel earth plate electrode 600mm x 600m m x 6mm thick directly buried in ground(earth pit not less than 2.25mtr deep below ground level) with top edge of the earth plate not less than 1.5mtr below the ground level connected to galvanised iron GI wire 4mm by means of nuts,bolts,check nuts and washer of galvanised iron at 2 points & GI pipe 15mm bore light grade for protection of earth strip PCC chamber 1:3:6 (type C-1)using 20mm graded stone aggregate funnel with wire mesh,50mm thick cover of RCC 1:2:4 type B-1 using 20mm graded stone aggregate reinforced and lifting handle on RCC cover with 8mm MS bars at 150mm centre to centre both ways and charcoal dust and common salt,all as shown in electrical plate No. 3 of MES SSR Part-I 2009 and making test point as specified including excavation & earth work and connecting the earthing to an earthing point/equipment incl testing on completion complete all as specified and dirtected. (Note:- The rates quoted shall deemed to be included the cost of earth test point, earth wire and protection pipe upto 7.5m beyond the earth plate electrode.)

Saurabh Enterprises

Sanjai sales and services