VS1-12 indoor high voltage vacuum circuit breaker, the series three-phase ac 50 hz, rated voltage of 12 kv indoor switch of the power system equipment, equipment, industrial and mining enterprises as a grid protection and controlUnit of power equipment. Apply to working in the rated electric demand flow frequent operation, or more open circuit short circuit current.

　　The circuit breaker operating mechanism and circuit breaker ontology unibody design, can be used as fixed installationUnit, also can equipped with special feed mechanism, form a handcartUnit.