| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a leakage current inspection apparatus for a distribution line, capable of improving its safety, reducing noise, lowering its inrush current, making its configuration compact, and optimizing its leakage checking period and leakage checking current. <P>SOLUTION: The leakage current inspection apparatus 10 includes: a timer circuit 2 capable of setting an energization period (leakage checking period) of the leakage checking current; a leakage current setting circuit 9 capable of setting the leakage checking current; and an energization circuit 5 for applying the leakage checking current, which is set by the leakage current setting circuit 9, to the distribution line. An operating time can be checked by the timer circuit 2, thereby reducing a risk of causing the leakage checking current to flow excessively by using the leakage current setting circuit 9. Furthermore, the energization circuit 5 includes a plurality of solid-state relays 54-56, and an isolation circuit 3 is disposed between the timer circuit 2 and the energization circuit 5 in order to make an electric insulation from the distribution line side. <P>COPYRIGHT: (C)2010,JPO&INPIT |
