Military Engineer Services Tender

Supply, installation, testing and commissioning of transformer step down, copper wounded, outdoor type complete with standard fittings, HT 11 KV 3 phase , LT 433 Volts, 3 phase , 4 wire, 50 HZ, 315 KVA capacity core type double copper wound, oil immersed naturally cooled, oil naturally Air natural (ON AN) with external cooling tubes, delta connected on primary side (HV) and star connected on secondary side (LV) , in accordance with victor group DYn-11 with natural, brought out on secondary side (LVside) and having tapping at ± 2.5 % & ± 5% on HV side to be charged by means of hand operated off load tap changer gear. The maximum temp rise should not exceed 45 degree celsius in oil and 55 degree celsius in HV/LV winding when measured by resistance method after continous full load run on an ambient temperature of 40 degree celsius. The transformer shall be IS 1180 maked and shall comprises of the following. (a) Three Nos porcelain bushing suitable for 11 KV on HV side complete with copper rods, nuts and washers. (b) One cable box on LT side (secondary side) consisting of four Nos porcelain bushing with copper rods, complete with nuts and washers with cable glands. (c) Oil conservator with filter type drain vlve and oil level gauge. (d) De-hydrating breather with first type fill of dehydrating agent (silka Gel) (Contd..)

(e) Explosive vent, thermo meter pocket on tank cover. Oil level gauge, oil drain filter valve,lifting lugs, oil filling hole with cap, plug with connection plate complete, air release valve plug and four Nos plain solid cast steel detachable rollers. (f) One No 100 mm dia dile type thermo meter vapour pressure type having range 0- 120 'C with metal guard having maximum perimeter temperature reading indicator with re- setting devices. (g) Two earthing terminals on tank cover to facilate fixing of 32x6 mm GI iron strip for earthing of body. (h) Rating plate and terminal marking plate. (j) Extra bushing for neutral, outside the cable box for providing independent set of earthing for neutral. (k) First filling of new and un-used transformer oil, IS-335 Marked of approved make, Filtrated and tested

Supply and laying XLPE insulated, armoured heavy duty electric cable with aluminium conductor, 11000 volts grade, cross-sectional area 95 Sqmm , 3 core laid in trenches/floor/on pole/under road, culvert etc complete all as specified and directed.