| 摘要 |
PROBLEM TO BE SOLVED: To provide a leakage alarm unit of a wiring breaker with a leakage alarm with a trip-free function granted in a simple structure. SOLUTION: The leakage alarm unit 15 of a wiring breaker with a leakage alarm consists of a trip unit 16 to be operated by an output signal of a leakage detecting circuit 5, an alarm switch 12 to be interlocked with an action of the trip unit, and a pop-up type leak display button 13 used as a resetting button as well. In a restrained state with a leak display button pressed in, a cam type control lever 20 of a single unit component structure is mounted on a slider 17 of the trip unit for coordinating with the leak display button 13 as a trip-free mechanism for outputting leakage alarms from the alarm switch by freely operating the trip unit at the time of flowing ground-fault current to an electric path, then the leakage alarm unit is made to correspond to each operation of setting, tripping, resetting and trip-freeing through the control lever. COPYRIGHT: (C)2009,JPO&INPIT
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