compact substation with 3 phase, 11/0.433, 50 Hz., 630 kVA, Mineral oil immersed Copper wound ,without gas cushioning ,hermetically Sealed transformer having indoor type transformerbushings, with HT side (incoming side) load break switch of appropriate capacity and LT side (outgoing side) MCCBs (4 pole) of appropriate capacity , with inbuilt metering cubical, using type A winding insulation (kraft paper), standard accessories complete with test certificate with losses below 1860 Watts at 50% load, 5300 Watts at 100% load fortransformer, as per IS:1180 (part 1) : 2014 ,