supply of outdoor type distribution transformer , outdoor type distribution transformer of rating 250kva, 3-phase, 50hz, 11kv/415v-240v or as per site requirement, plinth mounting, mineral oil immersed with freely breathing system (also called co nservator system) as per clause 8.2 (a) of is 2026 (part 1), winding star/delta requirement of primary win ding and secondary winding with vector symbol, confirming to is 2026 (part 1): 2011 (reaffirmed 2021) wi th copper wound, non-sealed type (transformer tank body and cover are bolted), copper wound, onan co oled transformer, confirming to is 1180 (part 1):2014 with amendment nos. 1,2,3,4 or latest, and supplied with all standard fittings mentioned in clause 20.1 of is 1180 (part 1) latest with condition that drain-cum-s ampling valve will be applicable for all capacity of transformers. oil temperature indicator & winding tempe rature indicators (for transformers above 200kva) will be provided as per clause 20.2 f) of is 1180(part 1). terminal arrangement: the transformers shall be fitted on high voltage and low voltage sides with outdoor type bushings of appropriate voltage and current ratings. the high voltage bushings (3 nos.) shall conform to is/iec 60137. the low voltage bushings (4 nos.) shall conform to is 7421. suitable cable-end box along with cable entry hole glands is to be provided as follows: a) for outdoor type: l.t. side b)for indoor type: h .t. side & l.t. side complete with oil and other accessories as per ser description no. ser/elec/gs/descri ption/trans/5/rev-0/jan 2025, dtd. 24/01/25 or latest. [ warranty period: 30 months after the date of d elivery ] ]