TKB1L-N RCBO is used for the protection against electrical leakage in the circuit of 50Hz or 60Hz, rated voltage 240V/415V. When an electric shock or the residual current of the circuit exceeds the threshold value, the RCBO can cut off the power within the time of 0.ls to protect the personal safety and preventing the equipment from the fault resulted by the Residual current. Combined with MCB RCBO can also protect the circuit against overload and short circuit. It conforms to IEC61009 standard.