Singi residual current circuit breaker  is applied in the power system of 50Hz,single phase 230V,three phases 400V.RCBO is composed of MCB high breaking miniature circuit breaker and current leakage release. The ELCB is current electronic current leakage circuit breaker, the main parts include zero sequence current transformer, electronic panel, current leakage release .

When somebody gets and electric shock or the leakage current exceeds the default value, the ELCB can cut off the power automatically to protect the personal safety and prevent the equipment from the fault resulted from the leakage current.

The ELCB also can protect the circuit against overload and short circuit or can be used for the unfrequent switch of the circuit under normal condition. And extra protection functions like over voltage, under voltage can be added according to customers' request.