| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric path connection failure detection circuit capable of recognizing opening operation of a breaker and capable of accurately detecting occurrence of a connection failure even when the breaker is included in an electric path.SOLUTION: An electric path connection failure detection circuit includes: a sensor circuit 41 provided at each electrode of an electric path 1 in order to detect a connection failure in the electric path 1; an opening operation detection circuit 42 for detecting opening operation of a breaker 3 provided in the electric path 1 of a monitoring target; an operation stop circuit 43 for stopping monitoring operation of the sensor circuit 41 subsequently to detection operation of the opening operation detection circuit 42; and a determination circuit 44 for determining that a connection failure has occurred when at least one of sensor circuits 41 has output an abnormality occurrence signal and the opening operation detection circuit 42 has not detected opening operation of the breaker 3.SELECTED DRAWING: Figure 1 |
