Switch on signal from current, voltage transformer directly; Set PT/CT transformer ration according to your requirement. Technical ParametersValue Input Network3-phase 3-wire, 3-phase 4-wire VoltageRated valueAC100V, 200V, 400V Overload1.2 times continual, instantaneous: 2 times/30s Power consumptionless than 0.8VA Impedancemore than 200kΩ CurrentRated valueAC1A, 5A Overload1.2 times continual, ...