... -load loss&energy conservation 2.Low noise&environmental protection 3.Power Transformers 4.IP20 IP23 5.IEC ISO 1,15kV, S11 ... ,3 phase oil immersion power transformer 2, aluminum or copper Winding 3, high efficiency, low ... GB/T 7595-1987 JB/T 3837-1998 Technical Data:1) Rated Power: 30~2500kVA2)Rated HV: 6KV,6.3KV, 10KV, 10 ...