supply of distribution transformer 500 kva , distribution transformer of rating 500 kva, 3-phase, 50hz, oil immersed, non-sealed type ( transformer tank body and cover are bolted), copper wound, primary winding in delta and secondary win ding in star (vector symbol- dyn11), onan cooled transformer, conforming to is 1180 (part 1):2014 with a mendment nos. 1,2,3,4 or latest, and supplied with all standard fittings mentioned in clause 20.1 of is 118 0 (part 1) latest with condition that drain-cum-sampling valve will be applicable for all capacity of transfor mers, oil temperature indicator & winding temperature indicators (for transformers above 200kva) will be provided as per clause 20.2 f) of is 1180 (part 1), other details as per attached annexure-a following pcee/ sers description no. ser/elec/gs/description/trans/4/ rev-2/feb 2026, [ warranty period: 30 mont hs after the date of delivery ] ]