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Domestic vacuum circuit breakers can be roughly divided into three categories: split structure, patchwork structure and integral structure

The split structure is designed completely according to the original Sn10 type of oil less circuit breaker. It is mainly for the transformation of the old oil less circuit breaker switchgear. Some are also installed on the new switchgear, such as zn7-10x, zn13-10x, zn19-10x, zn28-10a, etc

It has a patchwork structure with independent model mechanism, which is composed of CD10, CD17, CT8, ct17, ct19 and other mechanisms, vacuum arc extinguishing chamber, rotating shaft and spring to form a circuit breaker, such as zn7-10, zn13-10, zn19-10, ZN28-10, etc

Integral structure, which is characterized by vacuum circuit breaker without independent mechanism and less transmission loss. This kind of circuit breaker is mainly dominated by imported technology, such as ZN12-10

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

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

The contact compression stroke of circuit breaker with integral structure is generally 3 ~ 4 mm; The contact compression stroke of circuit breakers 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 breakers with split structure and patchwork structure are designed by imitation (split imitation SN10-10) and adaptation (combining split and operating mechanism).