SPECIAL REPAIR REPLACEMENT OF VCB AND ASSOCIATED WORKS AT SUB STATION NO 08 AT AF STATION GORAKHPUR

Amount

Disconnecting all electric connection and taking out carefully old unserviceable VCB indoor type complete with control panel and shall be deposited to MES store yard as directed By Engineer-in- Charge.

Supply ,Installing,testing and commissioning of 11 KV 3 phase 50 Hz, 630 Amp, vacuum circuit breaker (SF6 gas insulated) 01 Incoming and 05 outgoing extensible,indoor type,with motorized and manual spring charging facility short circuit breaking current capacity 21 KA/3 Second padlock provision for earth switch complete with all necessary accessories and standard fitting (e.g Relay , CT,PT, power pack, spring charging motor,trip coil, ammeter, voltmeter,indication lamp etc) as required at site comprises of the following. (i) 11 KV ,3 pole, 50 Hz 630 Amp, vacuum circuit breaker (VCB) having short circuit current with stand capability not less than 21 KA for 3 sec having manual and auto spring charging mechanism by DC universal motor suitable for 110V/230 V AC/DC or asper OEM recommendation shunt trip coil indication lamp, ON/OFF switch, padlock provision for earth switch , necessary electrical control wiring etc. complete all as specified and directed. (ii) Double core and double ratio dry type, suitable for 11 KV ,3 Phase,50 Hz VCBs current transformer (CTs) of ratio 100/50/5+5 or 100/50/1+1 or as approved having 15 VA burden or as per OEM recommendation with 0.5 CL accuracy for metering and SP 10 accuracy for protection -01 Set.

Item No 02 contd/-..... (iii) Dry type 11 KV/110 volt potential transformer (PT) suitable for 11 KV, 3 Phase,50 Hz , connected to bus bar class 1 accuracy of 100 VA burden or as OEM recommendation set of 01 No complete all as specified and directed. (iv) Electronic type ,solid state, programmable type, self powered, having overload, earth fault and short circuit tripping facility with memory to record fault event with fault current and type of fault with real date and time, suitable for 11 KV, 3 Phase, 50 Hz VCB and having high torque, less burden (Not more than 3 VA) and low over shoot suitable for 5 or 1 Amp currents rating and having three over current and one earth fault elements with over current range not less than 50% to 200 % in step of not more than 10% and earth fault range not less than of 5% to 80% in step of not more than 5% with time multiplier setting range not less than 0.1 to 1.0 in step of not more than 0.001( separate for over current & earth fault) suitable DC auxiliary supply and housed on horizontal draw out type case flush pattern with accessories duly connected with trip and alarm system -01 No complete all as specified and directed and make as per OEM recommendation (v) LED type indication lamps for circuit breaker open (OFF) 'GREEN' circuit breaker close (ON) 'RED' circuit breaker trip 'YELLOW' Spring charged 'BLUE' trip circuit healthy with push button and R/Y/B phase indication lamp etc complete-01 No. and Make as per OEM recommendation. (vi) Trip supervision relay.

S & F cable jointing kit for 11 KV (Earthed) grade cable for indoor tremination cold shrink type joint complete with jointing material and accessories suitable for making connection in supplied VCB above in 3 core XLPE armoured aluminium conductor cable of size 95 sqmm including taking out old joint complete all as specified and directed.

Material and labour for earthing complete in replacement with galvanized steel earth plate electrode 600mm X 600mm X 6mm buried directly in ground vertically to a depth not less than 2.25 meter below normal ground level (with top edge of earth plate not less than 1.5 meter below ground level) connected to GI strip 32mm X 6mm main earthing lead by means of galvanized bolts, nuts and washers all as shown in electrical plate No 3 of MES Schedule Part-I (2009) with connected to earth test point & to main switch board etc with & including adequate quantity of charcoal dust and common salt around earth plate, PCC 1:3:6 type C-1 using 20mm graded stone aggregate for earth pit with pre cast RCC (1:2:4) type B-1 using 20mm graded stone aggregate 40mm thick cover reinforced with MS round bar handle, GI light grade watering pipe 20 mm dia with funnel and wire mesh, and 40 mm dia GI light grade earth lead protection pipe, including earth work complete all as specified and directed. NOTE :- (i) The rates quoted shall also deemed to include the cost of Earth test point and earth wire and protection pipe upto 7.5 meter beyond the earth plates electrode and the earth resistance of the whole system shall be as near as possible to 0 but shall not in any case exced one ohm. (ii) Any joints in earth lead from earth electrode to test point shall not be allowed / permitted. (iii) The rates quoted shall also deemed to include earth work in soft soil ,returning filling in and removal of surplus soil to a distance not exceeding 50mtr

Supply, Laying , Testing & commissioning of cable 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 in replacement all as specified and directed. Note:- Excavation and earth work will be measured and paid seperately under relevant item. )

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.

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.

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.

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.

Supply, installation, Commissioning and testing pedestal mounting type, HT Junction box of size 1.8 m(H) x 1.5m(W) x 1.0m(D), suitable for 3 phase 11 KV , AC 50 Hz supply, made out of 3.15 mm thick CRCA MS sheet with 50mm x 50mm x 6mm angle iron frame, supports and legs, dust and vermin proof, suitable for Outdoor applications( IP-65 Protection) having canopy on top, double door in front side (Inner door should be bolted type and outer door should be hinged type with locking arrangement), complete with powder coated epoxy paint (RAL 7032 - SIEMENS RED) all over the steel surfaces(both internally & externally) and complete with aluminium bus bar of suitable shape and size and length not less than 1.0mtr for 3 phase rating of 600 amps duly mounted on suitable HT insulators and suitable HT bracket for holding/fixing clamping the cables with clamps complete including brick pedestal 450mm height above ground level for fixing M.S angle legs complete all as specified and directed.

SAGGI ELECTRIC COMPANY

Eco Creations

Yaduvanshi Traders

Roy and Sons Infrastructers

Hindustan Power Corporation

M/s Reliable Electromech Systems