1,10kV, S9 ,3 phase oil immersion power transformer 2,high efficiency,low loss 3,Low losses and Low ... fasteners have been processed with special treatment to prevent them from losening.StandardsGB 1094.1- ... LV: 0.4kV,0.415KV,0.38KV4)Phase No. :single or three;5)Rated frequency: 50Hzor 60 ... others in according to client needs;10)Cooling type: oil nature, oil cooling 10kV, S9 ,3 phase oil immersion power ...