| 摘要 |
The circuit breaker has fixed contacts (9,9') connected to input and output terminals (1,3), and co-operating with moving contacts (7,7') on a repulsion disc (8). The contacts are wired in parallel with a bridge network (10) of semiconductor diodes (13,15) and thyristors (17,19). The diagonal of the bridge contains a capacitor (21) in series with the disc repulsion coil (23). The diodes (13,15) are arranged in series opposition to incoming current from either direction (A or B), in contrast to the thyristors (17,19) which are triggered remotely or by a current sensor (20) a few microseconds after attainment of the trip current threshold. There is no arc giving rise to incandescent particles or ionised gases.
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