ZN85-40.5 type indoor high voltage vacuum circuit breaker is appropriate to 40.5kv,50Hz three phase current system

The layout of circuit breaker and operating mechanism are assembled up and down, which reduced the depth of circuit breaker effectively. Three poles interrupter and jointed charged body are isolated by epoxy resin insulator. This composite isolate structure meets the requirement of air and creepage distance and decreased the circuit breaker volume. Main conductive circuit ,vacuum interrupter, moving and fixed conductive joint are mounted in the cylinder, which makes the distance of each pole is only 300mm.Main circuit electrical joints are reliable all fixed joint. Specialized designed spring operating structure is fixed in the frame of circuit breaker. This simple design makes the output curve and performance greatly matches to 40.5kv circuit breaker. The overall layout is reasonable, simple and free of maintain. It can be used in frequent and harsh operating condition.