An electric leakage protection
circuit breaker comprises an electric leakage protection
electrode and at least one
circuit breaker electrode which are arranged side by side, and the electric leakage protection
electrode comprises a zero sequence
current transformer, an electronic
assembly board, an electric leakage tripper, an indicating mechanism and an electric
leakage power supply contact piece set composed of a movable contact piece and a static contact piece. An electric
leakage power supply contact piece group formed by the movable contact piece and the static contact piece is connected in series in a power supply loop for supplying power to the
electronic component board and / or the electric leakage release; the
circuit breaker pole comprises a
handle, an operating mechanism, a moving contact and a static contact, the moving contact is connected with the operating mechanism, the indicating button drives the contact piece to make contact with the static contact piece when located at the first indicating position, and the electric leakage
tripping iron core acts to trigger the operating mechanism of the circuit breaker pole to trip during electric leakage. Meanwhile, the electric leakage
tripping iron core drives the indication button to be switched from the first indication position to the second indication position, when the indication button moves to the second indication position, the movable contact piece and the static contact piece are separated, and the electric leakage
tripping device and the electronic
assembly board can be prevented from being burnt out.