... and distribution system to indicate relative parameter,such as AC,DC,Voltage,power synchronous volume,frequency,expended voltage and overload current ... onKV1KV-35KVSwitch on second current through current transformerDc ammeterμA,Ma50μA -500μA 1mA-500mADirectly switch onA1A-5A15A-750A75m V Buidout current ...