| 摘要 |
PROBLEM TO BE SOLVED: To prevent burning of electrical components such as a coil, a thyristor, etc. of an electromagnet device forming an electrical leak test circuit by continuous energization when continuously pushing a remote electrical leak test switch in testing an electrical leak in the case that a power supply of a ground fault interrupter and a load are reversely connected. SOLUTION: In the case of remote electrical leak test, when a remote electrical leak test switch 13 connected in parallel with the electrical leak test switch 10 is turned on, an amplifier 5 detects a current flowing through a winding 12 for test and turns on a thyristor 6, and an electromagnet device 7 is excited so that an electrical path contact 8 is turned off and a burning prevention switch 24 is turned off. Thus, even if the remote electrical leak test switch 13 is continuously pushed, a current does not flow through the winding 12 for test, thereby preventing burning of a coil and a thyristor of the electromagnetic device 7 is prevented. COPYRIGHT: (C)2005,JPO&NCIPI
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