Understanding Vacuum Circuit Breakers and Their Advantages

A vacuum circuit breaker is a type of electrical circuit breaker that uses a high vacuum environment to extinguish electric arcs. This technology relies on a high vacuum to quench the arc when the contacts separate during the breaking of a circuit. The term "vacuum" in its name refers to the high vacuum used as the arc extinguishing and insulating medium in the contact gap after the arc has been extinguished. Vacuum circuit breakers are commonly used in various applications where compact size, light weight, frequent operation, and minimal maintenance are essential, such as in industrial and mining enterprises, power plants, and distribution networks.

Advantages and applications of vacuum circuit breakers

Vacuum circuit breaker has many advantages, such as small size, light weight, suitable for frequent operation, no need to repair after extinguishing arc. These characteristics make the vacuum circuit breaker in the distribution network has been widely used, especially in the requirements of oil-free, less maintenance and frequent operation of the use of places, such as industrial and mining enterprises, power plants and substations, the vacuum circuit breaker can be configured in the middle cabinet, double cabinets and fixed cabinets, used to control and protect high-voltage electrical equipment.
 

Circuit breaker - isolation switch - load switch difference

1）Circuit breaker: fault current, rated current
Circuit breaker break insulation level is very low, so the ability to deal with overvoltage is very weak

2）Isolation switch: commonly known as the knife brake, to deal with voltage
Isolation switch can not deal with any large current, rated current and short circuit current, can cut small current

3）Load switch: A switch in between
Coping current: Rated current
Cope with voltage: The level of insulation at the break is higher than that of the circuit breaker, but lower than that of the isolation switch

Instructions for ordering Anhu vacuum circuit breakers：

Confirm configuration:Manual, isolated, intelligent, electric, protected current (transformer capacity)

Current confirmation method: directly ask the transformer capacity
Current setting: = capacity ÷17.32×2
For example: 500KVA transformer set current is 500÷17.2×2=58A Set 60A can be
Bracket: If the customer has no requirements for the bracket, the installation bracket is not provided by default