Fault analysis and treatment measures of high voltage vacuum circuit breaker

The high-voltage vacuum circuit breaker is one of the key appliances related to the effective control of the power system. Only by maintaining its good running condition can it ensure the normal and efficient operation of the circuit system. According to the key functions of the circuit breaker, it is necessary to detect the operating status of the vacuum circuit breaker in real time, find the problems in time and take corresponding measures to solve them. This article with you to share the high voltage vacuum circuit breaker on-site fault treatment method, hoping to provide a reference for the majority of users.

First, the general vacuum circuit breaker failure

Circuit breaker failure (such as circuit breaker rejection, data division, mis-closing and mis-opening); Energy storage mechanism failure; The vacuum degree is reduced and the arc extinguishing ability is damaged. The arc extinguishing capacity of the circuit breaker interrupter chamber decreases.

Second, failure cause analysis

1, circuit breaker reject, reject

The main causes of circuit breaker rejection are two aspects: circuit breaker secondary circuit failure and mechanical part failure. It should be solved according to different reasons. When there is no fault in the detection of the secondary circuit, it is necessary to observe the length of the clearance of the universal shaft head connected with the main crank arm of the operating mechanism. Sometimes, when the clearance is too large, it can still make the operating machine operate normally, but in such a case, it is easy to make the circuit breaker opening and closing link cannot be driven, and eventually the circuit breaker cannot open and close regularly. Therefore, the gap should be maintained within a certain range.

2, circuit breaker error

In the general operation of the circuit breaker, do not rush to switch off the circuit breaker when the external operation power and mechanical switching have not been carried out. To ensure that the operation is accurate, carefully detect the secondary circuit and the action mechanism. If there is a short circuit in the operating mechanism, the gate power supply will form a circuit between the gate coil and the short circuit point, causing the vacuum circuit breaker to misopen and close. The main factor that causes the wiring short circuit is that the top of the circuit breaker mechanism box leaks rain, and the rain water and the output crank arm are connected into a line just to contact the auxiliary switch of the mechanism.