... Transformer(BK,SBK),power transformer,electric transformer,JBK Machine Tool Control Transformer, Transformer,BKC,JBKDG & SGPower Transformer,Dry type transformer,Three-phase Dry-type Power Transformer,Transformer ... ,tunnel,etc.It is mainly used in power supply occasions of AC 50-60HZ and voltage less ... , tunnel, etc. It is mainly used in power supply occasions of AC 50~60Hz and voltage less than 500V ...