1.Low no-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 loss 4, low losses and low noise Describtation of Product:The three-phase oil-immersed ...