The working principle of vacuum circuit breaker and the role of vacuum circuit breaker in power system.

The vacuum circuit breaker is named after its arc extinguishing medium and the insulating medium of the contact gap after the arc extinguishing are high vacuum; it has the advantages of small size, light weight, suitable for frequent operation, and no need to overhaul the arc extinguishing. Internet applications are more popular.

Technical standards for vacuum circuit breakers:

Vacuum circuit breakers have developed vigorously in our country in the past ten years, and they are still in the ascendant. Vacuum circuit breakers are the main switchgear in the power system.

The products have developed from several varieties of ZN1～ZN5 in the past to more than dozens of models and varieties. The rated current has reached 5000A, the breaking current has reached a good level of 50kA, and the voltage has been developed to the level of 35kV.

The role of vacuum circuit breakers in the power system:

When the power system is operating normally, the vacuum circuit breaker can cut off and connect the no-load and load current of the line and various electrical equipment; when the power system fails, the vacuum circuit breaker and the relay protection cooperate to quickly cut off the fault current to prevent Expand the scope of the accident.