The development trend of vacuum circuit breakers

The superiority of vacuum circuit breaker is not only oil-free equipment, but also shows that it has long electrical life, mechanical life, large breaking insulation capacity, strong continuous breaking capacity, small size, light weight, and frequent operation. It has the advantages of avoiding fire, less operation and maintenance, and low failure rate. It is an ideal electrical equipment for unattended substations.

At present, it is being developed and used in large quantities at home and abroad, and has a tendency to completely replace the oil arc extinguishing medium.

At present, most of the substations have adopted multifunctional microcomputer (electronic) protection devices, and the degree of comprehensive automation has also increased, and the requirements for unattended operations have basically been met.

Therefore, a certain online inspection (self-inspection) function is required for the main electrical equipment, and vacuum circuit breakers should not be exceptions.

Common faults of vacuum circuit breakers

1. Mechanical failure

This type of failure rate is relatively small compared with the electrical failure rate. To implement online detection, it is still necessary for relevant departments to further unify the plan in terms of structure, size, and combination.

2. Electrical failure

This type of failure is a major problem that directly threatens the safety and stability of the power grid, and the probability cannot be ignored.

As far as an electrical fault of a vacuum circuit breaker is relative to a mechanical fault, the fault is not only serious in nature, but also has greater concealment, suddenness, and randomness, and it is difficult to predict in time.

Therefore, it is also common for manufacturers to remind users to observe the physical phenomenon of arc interruption in the vacuum interrupter in the factory report.

This type of failure not only threatens the safety of the power grid, but is also a major problem that can easily cause personal and national economic losses.