... 1,10kV, S9 ,3 phase oil immersion power transformer 2,high efficiency,low loss 3,Low losses ... The three-phase oil-immersed distributing transformer applies new type insulating structure and makes short-circuit resistances strong.The iron core ... T 7595-1987 JB/T 3837-1998technical data:1) Rated Power: 30~2500kVA2)Rated HV: 6KV,6.3KV, 10KV, ... , oil cooling 10kV, S9 ,3 phase oil immersion power transformer