Three types and differences of vacuum circuit breaker

Vacuum circuit breakers made in China can be roughly divided into three types: split structure, patchwork structure and integral structure.

The split structure is completely designed according to the imitation of the original oil-less circuit breaker SN10, mainly for the transformation of the old oil-less circuit breaker switchgear, and also installed on the new switchgear, such as ZN7-10X, ZN13-10X, ZN19-10X, ZN28-10A, etc

The patchwork structure with independent type mechanism is composed of CD10, CD17, CT8, CT17, CT19 and other mechanisms and vacuum arc extinguishing chamber, rotating shaft, spring, etc. to form a circuit breaker, such as ZN7-10, ZN13-10, ZN19-10, ZN28-10, etc

The integral structure is characterized by the vacuum circuit breaker without independent mechanism and low transmission loss. This type of circuit breaker is mainly based on imported technology, such as ZN12-10

The difference between the circuit breaker of integral structure and the circuit breaker of split structure/patchwork structure):

The circuit breaker with integral structure is generally a set of four-link transmission system; The split structure and patchwork structure are two sets of four-link transmission systems or one set of five-link transmission system and one set of four-link transmission system.

The contact compression stroke of integrated circuit breaker is generally 3~4 mm; The contact compression stroke of the circuit breaker with split structure and patchwork structure is generally 6-10 mm.

The circuit breaker with integral structure is designed according to the overall requirements of the circuit breaker in the control circuit; The circuit breaker with split structure and patchwork structure is designed by imitating (split imitating SN10-10) and combining (combining split and operating mechanism).