It is installed in the Inverter Air Conditioner , Ordinary Air Conditioner , Hot-water electric water heater,etc 1. Function 1) A type leakage current protect 2) It can protect the AC leakage, and to the lag voltage 0°,90°,135°,±DC6mA,that is to say what including the harmonic current will have leakage protection 3) Energy conservation,environmental protection,electronic circuit module, it can ...