1.certification ISO9001 ISO14001 2.made with IEC ANSL 3.low loss, pollution free 4.constant warranty 5.best service & price The products include S9, SZ9,SFZ9,SSZ9,SFSZ9,S10,SFZ10 and SFSZ10 series oil-immersed transformer ,with voltage class 10--110KV, and capacity 30--90000KVA. Supported by new design philosophy,the transformers can be made with excellent performance,low loos,lower noise, and ...