Military Engineer Services Tender

Supply, installation, testing and commissioning Outdoor type, step down transformer of 250 KVA capacity, 11/0.433KV , AC 3 phase, 50 HZ, double copper wound type core, oil immersed, naturally cooled, oil natural Air Natural(ONAN) with external cooling tubes delta connected on primary side (HV) and star connected on secondary side (LV) in accordance with vector group Dyn-11 with neutral brought out on secondary side (LV) and having tappings at (-) 2.5% to 7.5% @ 2.5% on HV side to changed by means of hand operated off load tap changer gear. The maximum temperature rise should not exceed 45 degree celsius in oil and 55 degree celsius in HV/LV winding when measured by resistance method after cotinuous full load run on an ambient temp of 40 degree celsius in oil as prevalling at site.The transformer shall be complete with the fittings and accessories comprising of items as mentioned here as under: Make : Crompton Schneider Indian Transformer & Electrical Pvt Ltd (Brand-ITE Gurgaon. Note : The transformer shall be complete with all fittings and accesories comprising of item as mentioned here as under. (a) LT side (secondary side) consisting four Nos porcelain bushing with copper/brass studs, complete with nut & washers complete with copper bus connectors of suitable capacity/fittings material complete. (b) HT side (primary side) consisting three Nos porcelain bushing with copper/brass studs, complete with nut & washers complete with HT bushing suitable for outdoor mounting of transformer complete. (c) Oil conservator with filter type drain valve and oil level gauge.strength at 2.5 mm air gap between testing electrodes. (d) Dehydrating breather with first fill of dehydrating agent (silica gel) (e) Explosive vent & thermometer 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 , dial type thermometer vapor pressure type having range 0-120 degree celcius with metal guard having maximum perimeter temperature reading indicator with resetting device. (g) Two earthing terminals on transformer body to facitilate for fixing of 50 x 6 mm galvanised iron earth strip for earthing of neutral and body. (h) Rating and diagram plate and terminal marking plate. (j) Rates includes extra bushing for neutral on LT side for providing independent set of earthing for neutral 2 Nos. (k) First filling of new and unused transformer oil , IS 335 marked filtered and tested upto 60 KV dielectric Note :- Any other items which are not mentioned above but are essential for smooth functioning of transformer shall also deemed to be included in the quoted rates.

Supply and lay cable XLPE Insulated screened PVC bedded, galvanized steel strip or wire armored, electric power cables (heavy duty) 1100 Volts grade with stranded aluminium conductor of size 25 Sqmm 4 core

Returning, filling in, including spreading, levelling, watering and well ramming in layers not exceeding 25 cm in soft/loose soil all as specified & directed