| 摘要 |
PROBLEM TO BE SOLVED: To obtain a wiring breaker, having leakage alarming function that can give an output signal as leakage alarm to exterior, even if a leaking trouble happens in the state that the reset button has been depressed. SOLUTION: This is equipped with a zero-phase current transformer 11 that detects leakage current of electrical circuit, an amplifier circuit 12 that amplifies the leakage current detected by this zero-phase current transformer, an electromagnet 13 driven by the leakage current amplified by this amplifier circuit, a trip-free mechanism 20 with a leakage display member 18 that conducts leakage display linked with the movement of this electromagnet, and a plurality of switches 14, 15 that perform-switching action linked with the action of this trip-free mechanism.
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