Vacuum circuit breaker equips with vacuum interrupter guarantees stable breaking capacity with no hazardous risks of explosion. The equipment is safe, maintenance-free, compact, light-weighted and long life expectation on mechanical operation. The circuit breaker is enclosed in SF6 filled or N2 filled mental enclosure which is condensation and humidity resistance, suitable for high temperature and humidity application. Circuit breaker equips with three phase CT, output 3 phase current for analysis by intelligent controller. The operation of circuit breaker can be motor, manual, or remote operated. The operation mechanism can be changed freely without affecting the tightness of mental enclosure. The life expectance on operation can reach 10000 times. This product is in combination with controller which used as recloser, sectionalizer, load switch, coupler switch.