procurement of 250 kva transformer for township electric supply , btps township . , 250 kva transformer for township electric supply , btps township . , outdoor type distribution transformer for power supply 250 kva , 11 / 0 . 433 kv dyn11 , oil-filled outdoor type additional data: crgo core type , double copper wound , transformer having voltage ratio 11000 / 433 volts , tapping at hv side +5% to -5% @ 2 . 5% through off circuit tap changing switch , 3 phases , 50 hz , ac supply , onan cooled , vector group dyn 11 , outdoor type ( ht: bare bushing , lt: cable box ) , complete with all standard fittings & first filling of transformer oil and built in accordance with is / 2026 with latest amendment . level 2 . , item code m04-t05-00304 , hsn:8504 . , gst , if any