... 1 set. Control 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 ... requirements.Working conditions 1.Ambient temperature: -15°C~+40°C 2.Altitude: ... 5.Function: indication of input voltage, output voltage and current. 6.Protection: over-current ...