... (BK,SBK),power transformer,electric transformer,JBK Machine Tool Control Transformer, Transformer,BKC,JBKDG & SGPower Transformer,Dry type transformer,Three- ... gas,steam,chemical deposition,dust or dirt that will affect transformers insulation seriously,also explosive or corrosive medium is not allowed ... capability: for 1min under two times of rated current power transformers provider 220v to 380v