bids are invited for supply, fixing, connection, testing and commissioning of power distribution transformer, 3phase, 11 kv / 415 v, capacity- 500 kva, isi marked-yes, energy efficiency level-5, bee star rating-5, nominal system voltage hv ( in kva ) -11, nominal system voltage lv ( in v ) -415, rated frequency-50 hz + / -5%, minimum basic insulation level ( kvp ) -75, no load voltage ratios ( in volts ) - 11000 / 433-250, highest system voltage for equipment ( in kv ) -12, core material-crgo ( as per is: 3024, latest ) , conductor ( winding ) material-copper, material of transformer tank- mild steel, vector group-dyn-11, type of cooling- onan, cable end box in hv side- yes, cable end box in lv side- yes, oil temperature indicator and winding temperature indicator , buchholz relay- yes, protection relays for sealed type transformers for internal parameters that is pressure, temperature, oil level and gas detection-yes, standard fittings shall be provided with each distribution transformer-as per ci.20.1 of is: 1180 ( part 1 ) : 2014 amdt. 1, type of mountingground mounted, minimum warranty from the date of installation-24 months, minimum warranty on receipt of stores-30 months, make - servokon, servostar, euro power, airen power, bala industries or similar.