What are the common faults of sulfur hexafluoride circuit breakers?- SF6在线监测系统_SF6检漏仪_SF6传感器_SF6密度继电器

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What are the common faults of sulfur hexafluoride circuit breakers?

发布时间：2017-05-18 来源：ydlcb 浏览次数：35次

(1) If the red and green lights are not on before the closing operation, the control circuit is broken or there is no control power supply (such as control safety). It can check whether the various components of the control power supply and the entire control circuit are normal, such as whether the operating voltage is normal, whether the fuse is blown, whether the anti-jump relay is normal, whether the auxiliary contact of the circuit breaker is good, and whether there is a pressure reduction lock.

(2) When the red light is not on after the operation, the green light flashes and the accident horn sounds, it indicates that the position of the operation handle does not correspond to the position of the circuit breaker, and the circuit breaker is not closed. The common reason is that the fuse of the closing circuit fuse is blown or the contact is poor; The closing contactor does not operate; The closing coil is faulty.

(3) When the circuit breaker is operated, the green light is off and the red light is on, but the red light is off and the green light flashes instantly, and the accident horn sounds, indicating that the circuit breaker is automatically tripped after closing. The reason may be that the circuit breaker is closed on the faulty line causing the protective action to trip or the circuit breaker mechanical failure can not keep the circuit breaker in the closed state.

(4) If the green light is off after the operation is closed, the red light is not on, but the ammeter has indicated that the circuit breaker has been closed. The possible cause is that the circuit breaker auxiliary contact or control switch contact is poor contact, or the trip coil is disconnected so that the circuit is blocked, or the control circuit fuse is blown, or the indicating lamp is damaged.

(5) Two point grounding of DC power supply of switching circuit.