SPD DEVICE WITH CIRCUIT BREAKER

PROBLEM TO BE SOLVED: To provide an SPD device with a circuit breaker which can enhance the suppression effect of a limit voltage for the surge voltage while facilitating the connection and decreasing the installation place, and in which the replacement work of a failed SPD can be carried out easily in safety, and the failed SPD can be disconnected by interrupting the circuit breaker during abnormal operation of the SPD.SOLUTION: The SPD device with a circuit breaker comprises a circuit breaker 1, an SPD unit 28 including a primary terminal consisting of a terminal block which can be connected directly with the circuit breaker 1, and a terminal cover 30 covering the connection of the circuit breaker 1 and the SPD unit 28.