Features Monitoring high voltage side voltage,low voltage side current and indicating of zero position,power,operation,timing; Over-current protection,zero-starting protection,sound and light alarm; With new type time relay,time rang is more wider (1S ~ 99H); Using the latest current relay, more accurate and reliable; Test transformer high voltage coil is made by high quality polyester varnished wire and high voltage insulation material; 5kVA and above Testing Transformer with movable iron wheel. Light weight, small size, easy to move, superior performance.