PROVISION OF 01 X TROLLEY MOUNTED 500 KAV TRANSFORMERS (STANDBY) FOR FIRING AND COMBAT TRG AREA AT VARANASI CANTT UNDER GE (EAST) PRAYAGRAJ.

Amount

Supply, installation, testing and commissioning outdoor type transformer of capacity 500 KVA step down phase 50 Hz oil immersed, 11/0.433 KVA complete,air naturally cooled (ONAN type) with external cooling tubes/fins, level 2 type,5 star rated,double wound core type copper wound having no load voltage ratio 11 KV/433V corresponding to principal tapping, delta connected primary side (HV side) and star connected secondary side (LV side) in accordance with vector symbol DYN 11 (Vector, group-4) with neutral brought out on LV side and having tapping on HV side for constant output so as to alter/vary secondary voltage from +2.5% to ± 2.5% , ± 5% & ± 7.5 % to be changed by means of manual OFF LOAD tap changing rise should not exceed 45º C in oil and 55 º C when measured by the resistance method after continuous full load in and as ambient temperature 40 º C. The transformer oil having dielectric strength not less than 60 KV arrangements complete and confirming to IS : 2026 complete all as specified. The limit of temp rise after continuous full load sum as specified in SSR PR-I & IS-2026 shall be suitably adjusted to suit the minimum ambit temp prevelling at site including transport from store yard Varanasi Cantt. The transformer shall be completed with fitting and accessories all as following (a) Oil conservator tank with filling holes and cap filter type drain valve and oil level gauge

(b) Silica gel breather with connecting pipe and first fill of dehydrating agent (c) Air Release valve plug (d) 01 No 100mm dia type thermometer vapour pressure type having rating 0-120 degree centigrate with max temp indicator and resetting device incl max reading pointer washers (e) Thermometer pocket on tank cover (f) 04 Nos plain solid CI detachable rollers (g) 02 Nos Earthing terminals on tank cover to facilitate GI Earth Strip (h) Rating plate and terminal marking plate (j) First filling of oil confirming to IS 335 and tested upto 50KV/2.5mm dielectric strength (k) Lifting lugs/hook (l) Oil drain valve with plug (m) Cable end terminal boxes on LV and HV side consisting of 04 Nos porcelain bushing with nuts washers & bushing rod with one No cable gland suitable for existing size of LT cable on LV side including additional neutral separately brought out side LV cable end box with bush insulators for neutral earthing. 03 Nos HV porcelain bushings with nuts,washers and bushing rod with one No cable gland suitable for 3x95 sqmm H.T. cable on HV side complete all as specied and directed. (n) Explosive Vent (o) Two Nos GI tubing light grade 100mm dia 60cm long embedded in brick/wall on LT/HT side for drawing underground cable (p) Taking down cement plaster on brick or stone walls etc including raking out joints, hacking for key, scrubbing down with water etc of existing transformer foundation including rendering 10mm thick on fair faces of brick work or concrete surfaces on existing foundation in cement mortar ratio 1:6

M&L for trolley for transformer of size 2.8 x 2.5 Mtr made out of mild steel angle/ chanels medium weight beams & MS flates withj necessary welding in any postion driliing in hot/cold etc for longitude and cross members of trolly made out of ISMC channel 100 and top of the members coverd with 6 mm thick MS plate plateform and vertical support over the plateform with MS equal angle of size 50 x 50 x 6 mm thick angles with MS flate 50 x 5 mm thick for two runs of bracing the supports, V type towing frame with hook with spring and check nuts and mounting bracket with bush for movement of tow assembly. The assembly made out of ISMC chanel 100 with long and cross member, turning plate assembly for front wheel only fitted in front axle, the front and rear axle made out of medium weight beam ISMB 100 including tyre with tube F78-15 8 play rotaing four Nos with wheel drum, mounting bracket, bearings, check nuts, locknuts, key etc welded with medium beam with nut bolts washers as required for mounting the transformer complete all l as specified and directed.

Supply, laying and testing cable XLPE Insulated ,screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 240 sq mm 3.5 core complete all l as specified and directed.

Supply, laying & testing cable XLPE insulated, screened, PVC bedded, galvanized steel strip or wire armoured, electric power cables (heavy duty)with stranded aluminium conductor, 11000 volts grade, of size 3 core 95 sq mm complete all l as specified and directed.

Earth continuity conductor or main earthing lead fixed to wall on batten or recess or chases or buried in ground or drawn in conduit/pipe or fixed to poles or any other indicated situation for loop earthing etc. as required but 25x4mm galvanised iron strip strip complete all l as specified and directed.

Supply and fix cable jointing kit for 11 KV grade cable for out door termination cold shrink type joint complete with jointing material and accessories suitable for 3 core XLPE, armoured, aluminium conductor cable of size 95 Sqmm complete all l as specified and directed.

HUMERS INFRATECH