SPECIAL REPAIR REPLACEMENT OF UNSERVICEABLE VCBs AT MRS DARJIPURA AT AF STN VADODARA

Supply, install, testing and commissioning of indoor type HT vaccum circuit breakers panel of suitable size to match with existing VCB extensible type having 3 Nos out going VCBs to be coupled with existing VCB panel installed at New MRS building, capacity of each VCB 11 KV, Minimum 800 Amp, 3 Phase, 3 wire, 50 Hz, having 26.3 KA breaking capacity, all specified as per IEC 62271-100 & IEC 62271-200 totally enclosed single bus bar for each phase, floor mounting, metal clad, flush fronted, horizonal draw out type, horizontal. isolation type, Indor extensible type, with Elecrtical and Mechanical interlock and automatic safety shutter gear including padlocking arrangement, isolation plugs, assembly of 3 vaccum interrupters, with epoxy support insulations and self- aligning finger type isolating contracts, truck having integral racking with necessary interlocks ( for insertion and withdrawal of VCB), manual and automatic motor charged independent closing/tripping spring, trip free operating mechanism with closing and tripping push buttons and mechanical breaker, all standard fitting and accessories of following :- (a) Bus bar chamber with 3 phase copper bus bar 1000 Amp rating duly insulated - 01 Set (set of three). (b) Electrical trip coil 30 V DC / 110V DC-1 No (c) Electrical shunt coil 30 V DC/110 VDC-01 No (d) CT Chamber incorporating 3 Nos single phase rasin cast current transformer ratio 200/100/5-5 class 1.0 for metering & class 5P10 for protection and burdon 15 VA, 11 KV, 25 KA for 1 Sec-1 No (f) Digital ammeter 0 to 200 Amp, (100% of CT ratio) for 3 Phase- 01 No (g) Digital voltmeter rating 0 to 12 KV, for 3 phase-01 No (h) Digital Load manager for amps, volts, KW, KVA, KVAR and PF Make : Conserve EM 6400, Secure Ellite 443 or requivelant/ model-01 No as approved by GE.

Supply & install float cum Boost charger Panel with battery having input voltage 415+ 10% AC 50 Hz and output 110 V, 30 Amp DC auxillary power supply system for protection of panels complete with sealed maintenance free lead acid/VRLA batteries 110 volts (2V x 55 Nos) 100 AH, mounted on and including MS rack and connecting wire connection complete, with installed capacity including 110 V-30A as per DC ammeter, voltmeter, switches for 11 KV system including taking out existing charger complete.

M&L Earthing complete with galvanised steel electrode 60 cm x 60 cm x 6 mm burried directly in ground vertically to a depth not less than 2.25 metre below normal ground level with top edge of earth at a depth not less than 1.5 metre below ground level connected to and including galvanised earth lead as GI strip of 32x6mm size by means of bolts, nuts, check nuts and washer etc made of galvanised iron and connected to earthing test point all as shown in electrical plate No 3 of SSR Part I 2009 and as specified or indicated and testing on completion including excavation& earth work in any type of strata, PCC (1:3:6) type C1 earthing chamber, precast RCC slab 50mm thick in reinforced cement concrete (1:2:4) type B1 reinforced with welded steel wire fabric (XPM jali weight not less than 4 Kg/Sqm), cast iron frame, funnel with wire mesh, 40 mm bore medium grade GI watering pipe, lugs, 40mm bore medium grade GI protection pipe, test point etc. complete all as specified and directed. Note :- (i) Rate quoted under this item is deemed to include the cost of 7.5m length of earth lead and its protection tube. Any addition in length shall be measured and paid extra.

Supply and fixing of 4 core 2.5 sqmm PVC insulated PVC sheathed control cable copper unarmoured complete all as specified and as directed.