| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a deposition detection system detecting presence or absence of deposition of a contact pair without controlling a relay to be in a current-supplied state.SOLUTION: A deposition detection system 1 has: a main circuit part 11 having a DC power source 12, a power supply device 13 and a main circuit part relay 2; a signal generator 3 generating an AC signal; a measurement part 4 measuring an electrical characteristic value on signal wiring 30 between the signal generator 3 and the main circuit part 11; a deposition determination part 5; and a first forced grounding part 6. The deposition determination part 5 determines whether or not a contact pair 21 of the main circuit part relay 2 is deposited, on the basis of the electrical characteristic value obtained by the measurement part 4. The first forced grounding part 6 is arranged between a grounded conductive member 61 and the main circuit part 11, and has a first deposition inspection switch 62 for switching between supply and block-off of a current flowing from the main circuit part 11 to the conductive member 61, and is connected to a position (a connection point B) at an opposite side to a connection point A of the signal generator 3 with respect to the main circuit part relay 2 in the main circuit part 11.</p> |
