| 摘要 |
PURPOSE: A circuit for detecting a disorder of a trip coil of a vacuum circuit breaker is provided to confirm whether a trip coil is abnormal by detecting a current flowing through a trip coil. CONSTITUTION: A motor relay(MR) drives a spring charge motor(M). Interlock limit switches(LS1,LS2) intercept a power supply of a motor relay. A closing switch(CS1) supplies a power to a closing coil(C). An anti-pump relay(Y) intercepts a power supply of a closing coil to make a trip standby state. A coil disorder detector(100) compares a current flowing through a trip coil with a reference voltage and outputs a comparison result signal to detect whether the trip coil is abnormal. An intercepting relay(F1) drives to intercept a voltage supplied to the trip coil when the coil disorder detector(100) outputs a trip coil disorder signal.
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