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Cause Analysis and Treatment Method of Circuit Breaker Failing to Open

2022-08-15

2022-03-14

1. Analysis of the reasons why the circuit breaker cannot be opened
(1) Before opening, if the red light does not light up, it may be caused by the following control loops
1) The filament of the bulb is blown, the control fuse is blown, loose or in poor contact
2) Poor contact or disconnection of lamps and additional resistors
3) The auxiliary contacts of the circuit breaker are in poor contact
4) The energy storage of the operating mechanism is not enough or the air pressure of the air pressure circuit breaker is not enough and the locking contact is bonded
5) The tripping and closing coil is disconnected or has poor contact
6) The contacts of the control switch are in poor contact
7) The current coil of the anti-jump relay is disconnected or has poor contact
8) Other connecting lines of the control loop are disconnected

(2) If the red light is on and cannot be closed before closing, it may be caused by the following electrical circuits
1) Poor contact of control switch contacts

2) Because the operation control switch is not in place, the contact of the contact is poor or the control switch returns too early.


(3) Mechanical circuit failure

2. The treatment method of the circuit breaker can not be opened
If the red light does not light up before the switch-off, it should be handled according to the processing method that the red and green lights of the circuit breaker do not light up. If the red light is on and the circuit breaker cannot be opened before opening, the electrical circuit should be checked: if no abnormality is found after checking the electrical circuit is intact, it can be judged as a mechanical failure, and it should be immediately reported to the dispatcher and the relevant leadership of the superior. The method of operation mode will withdraw the fault circuit breaker from operation, and notify the maintenance personnel to deal with it.