| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-phase ground-fault circuit interrupter which has a shorter circuit-breaking time and hardly fails even at the time of reverse connection. SOLUTION: A first three-phase full-wave rectification circuit 8a connected with three phases of an electric path 1 is arranged on a power source of a leakage determining circuit 7 which determines generation of leaked electricity from detection current of a zero-phase current transformer 3, and a second three-phase full-wave rectification circuit 11 is arranged as a power supply circuit of a trip coil 4 which opens an opening and closing section 2. Then, a relay contact 5 for opening in connection with opening of the opening and closing section 2 is arranged in series with the trip coil 4. COPYRIGHT: (C)2009,JPO&INPIT
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