| 摘要 |
PURPOSE:To obtain a leakage warning system in which a leakage warning function is normally operated and a leakage position can be easily discovered, by providing leakage detectors in a master breaker, a branch breaker, providing a leakage detection display unit in the branch breaker, and using the output of the detector of the master breaker as an alarm output. CONSTITUTION:Switching contacts r1, r2 for breaking an electric circuit when a master breaker 1 and a branch breaker 2 detect overcurrents, are provided, and leakage detectors 4, 5 for detecting leakage are provided. An indication unit 6 for indicating 9 leakage when the breaker 2 detects leakage is provided. If a leakage occurs, the breakers 1, 2 detect the leakage, the breaker 1 outputs an alarm signal, and the breaker 2 lights the unit 6 to indicate the occurrence of the leakage. Accordingly, the leakage can be known by the signal from the breaker 1, and when the unit 6 of the breaker 2 is observed, the leakage of the branch circuit l1 can be easily judged. |
