... energy conservation 2.Low noise&environmental protection 3.Power Transformers 4.IP20 IP23 5.IEC ISO 1, ... S11 ,3 phase oil immersion power transformer 2, aluminum or copper Winding 3, high efficiency, low loss 4, ... iron core is made of high-quality cold-rolled silicon-steel plate. High-voltage winding group is made up ... JB/T 3837-1998 Technical Data:1) Rated Power: 30~2500kVA2)Rated HV: 6KV,6.3KV, 10KV ...