| 摘要 |
PROBLEM TO BE SOLVED: To detect overheating of terminal parts of each device with one detector in a distribution board equipped with internal devices such as a terminal board, a limiter, and a breaker.SOLUTION: A power line 11 is connected with a first input terminal 61 of a terminal board 6, and a first output terminal 62 of the terminal board 6 is connected with a primary side terminal 41 of a limiter 4 with a lead wire 21. A secondary side terminal 42 of the limiter 4 is connected with a secondary input terminal 63 of the terminal board 6 with a lead wire 22, and a secondary output terminal 64 of the terminal board 6 is connected with a primary side terminal 51 of a trunk breaker 5. A secondary side terminal 52 of the trunk breaker 5 is connected with a secondary side terminal 72 of an overheat detector 7 through a relay copper bar 13 and a branch copper bar 14, and the primary side terminal 71 is connected with the first input terminal 61 of the terminal board 6 through a lead wire 23. A sensor circuit is incorporated in the overheat detector 7 to detect connection failures of the respective terminals 41, 42, 51, 52, 61, 62, 63, 64 of the limiter 4, the trunk breaker 5, and the terminal board 6. |
