By the Xi'an High Voltage Apparatus Research Institute and R & D center in Shaoxing, Zhejiang Province Power Company electric power, and Haining Switch Factory Co., Ltd. jointly developed the "cut 12 kV capacitor group dedicated vacuum breaker" projects identified by the class. The product is very solid-closure structure, use long-life spring actuator and R contact the vacuum chamber structure, product mix reasonable, performance indicators have reached the advanced international level, with independent intellectual property rights. Realized that the subject Dry capacitor project, then design, then completed the high efficiency of operation, the new product has been linked to substation in Shangyu, Zhejiang Province network operation, which is scheduled for 2008 in Zhejiang Province to promote the use of.