Abstract: Recently, because various countries in the world pay more attention to the environment,SF6 which is as a greenhouse gas has being limited in the use and discharging, so the development of SF6 circuit breaker in the electrical equipment field also has being restricted. Meanwhile,vacuum circuit breaker has occupied the leading status in the middle-voltage. China has numerous vacuum breaker and the use of it accounts for 80%, especially 10KV vacuum circuit breaker has developed the best. At present,10KV vacuum circuit breaker in the main has achieved products of nationalization. Even in some aspects it has reached the international advanced standard. 10KV vacuum circuit breaker plays a vital role in the development of electrical net, which can not be substituted in the middle circuit breaker field.
A vacuum circuit-breaker is designed and related checking computations have been carried on, by taking the ZN vacuum circuit-breaker as the reference. The design of vacuum extinguishing of arc chamber in this text has entered the research of the massive analyses. The contact uses the-vertical-blow-type extinguishing of arc contact made of CUCR material. The related moves and the thermostat ability, and the checking computations of temperature’s going up, are all up to the national standard. The vibrator unit uses the electromagnetism to hold the drive mechanism. In brief, this design in various respects satisfies the fixed duty and meets the design requirements.
【Key words】 the vacuum circuit-breaker vacuum extinguishing of arc chamber contact the drive mechanism
