... 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 ... JB/T 3837-1998 Technical Data:1) Rated Power: 30~2500kVA2)Rated HV: 6KV,6.3KV, ... , oil cooling Performance Parameter List: Ratedcapacity(kVA)Voltage combination and tap rangeConnectionGroupNo-loadloss(W)75oC load ...