| 摘要 |
A circuit breaker is provided to minimize the thickness of a case of the circuit breaker by configuring thin assembly products of a zero-phase sequence current transformer and a first conductor. A circuit breaker includes a power terminal electrode(13), a load terminal electrode(14), a zero-phase sequence current transformer(41), and a plurality of first conductors. The power terminal electrode, the load terminal electrode and the zero-phase sequence current transformer are installed inside a case of the circuit breaker. The first conductors are installed on the zero-phase sequence current transformer. The circuit breaker breaks an electric circuit by operating a braking unit when the zero-phase sequence current transformer detects a short circuit. A penetration groove is formed on a central part of the zero-phase sequence current transformer of a ring shape body. The first conductor is installed on the zero-phase sequence current transformer by a bending process after the first conductor penetrates the penetration groove. Both ends of the first conductors are contacted with both side planes of the zero-phase sequence current transformer, and are electrically contacted with the power terminal electrode and the load power electrode.
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