1,10kV, S9 ,3 phase oil immersion power transformer 2,high efficiency,low loss 3,Low losses and Low Noise Describtation of the product:The three ... .415KV,0.38KV4)Phase No. :single or three;5)Rated frequency: 50Hzor 60 Hz;6)Vector group: Dyn11, Yyn0 or others ... : oil nature, oil cooling 10kV, S9 ,3 phase oil immersion power transformer