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-phase ... -1987 JB/T 3837-1998technical data:1) Rated Power: 30~2500kVA2)Rated HV: 6KV,6.3KV, 10KV ... : oil nature, oil cooling 10kV, S9 ,3 phase oil immersion power transformer