1,10kV, S9 ,3 phase oil immersion power transformer 2,high efficiency,low loss 3,Low losses and ... with special treatment to prevent them from losening.StandardsGB 1094.1-1996 GB 1094.2-1996 JB/T 10088-2004GB 1094 ... -1999 GB/T 7595-1987 JB/T 3837-1998technical data:1) Rated Power: 30~2500kVA2)Rated HV: 6KV,6.3KV, 10KV, 10 ... : oil nature, oil cooling 10kV, S9 ,3 phase oil immersion power transformer