| 摘要 |
<p>PROBLEM TO BE SOLVED: To ensure safety by preventing occurrence of troubles, including electric shock accidents. SOLUTION: A plug 20 of a charging device A is connected to a wall socket, and a connector 21 is coupled to the connector 32 of an electric vehicle B so that a simulated leakage is caused to occur by a test circuit 3. When a leakage detecting circuit 2 operates normally, power supply lines L1, L2 are opened once and then closed again, to start charging. If an abnormality occurs to the leakage detecting circuit 2, the power supply lines L1, L2 are opened to inhibit charging. Thus, charging can be started, only when the circuit 2 operates normally so as to prevent troubles, including electric shock accidents. Because the operation of the leakage detecting circuit 2 is checked prior to charging, safety can be ensured and charging can be performed smoothly.</p> |
