... /voltage , phase sequence protection 3) MCU control, no brush, no wea ST Step-down transformer Specifications Specifications :1.Input ... load) 3.Efficiency: over 95% 4.MOQ: 1 set Control Transformer(BK,SBK),power transformer,electric transformer,JBK Machine Tool ... Control Transformer, Transformer,BKC,JBKDG & SGPower Transformer,Dry type ...