| 摘要 |
PROBLEM TO BE SOLVED: To provide a ground-fault interrupter whose body can be miniaturized. SOLUTION: There are provided a handle 6, a multiple-pole contacts 2A, 2B, 3A, and 3B, a zero-phase current transformer ZCT, and a leakage test button 78. There is also provided circuit boards 73 and 74 to which, implementing a leakage detection circuit 51 which supplies a tripper coil 68 with an excitation current, a leakage test movable plate 76a driven by operation of the leakage test button 78 and a leakage test fixed contact 76b which allows a pseudo unbalance current to flow to the zero-phase current transformer ZCT when the leakage test movable plate 76a contacts/comes off, are attached/ detached, and they are so disposed that both end faces face the upper and lower surfaces of a body 1. The leakage test movable plate 76a is disposed on the end face side of the circuit board 70 positioned on the upper surface side of the body, with the fixed contact 76b formed on the end face. COPYRIGHT: (C)2003,JPO
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