Residual-current circuit breaker

The embodiment of the utility model provides a residual-current circuit breaker, which comprises a first mutual inductor, a leakage tripping module, a conducting bar and a magnetic tripping module, and is characterized in that a multi-phase conductor of the residual-current circuit breaker passes through a coil hole of the first mutual inductor, and when magnetic flux is generated in the coil hole, the first mutual inductor generates induced current under the action of the magnetic flux; the leakage tripping module is used for controlling the leakage circuit breaker to trip according to the induction current; one end of the conducting bar is connected with any phase of conductor in the multi-phase conductor and is used for generating a first magnetic field when current passes through; the magnetic separation module comprises a static armature and a moving armature; the static armature is close to the other end of the conducting bar and is used for magnetizing under the action of the first magnetic field so as