Outdoor SF6 Circuit Breaker

Main Characteristics 1. The breaker, dead dank style, three phases interoperate, automatic relcosing or selecting one of the phases to be relcosed automatically, double fractures, short arcing time, long electric life, low operating noise, strong capacity in resisting earthquake. 2. Excellent breaking capacity The interrupter adopts self-energizing principle (pressure + hot expansion). The operating power necessary in breaking is minimized to reduce the load on the mechanism. The traditional self-energizing interrupter is improved in this breaker, for there is no breaking dead area. The rated short circuit breaking current is 63kA, the total breaking time is 2 cycle waves. 3. Excellent operating mechanism The mechanism, HMB-8 hydraulic operating mechanism manufactured by ABB Company, provides reliable operation, 6000times’ mechanical life, less maintenance, etc. There are more than 20,000 sets of such mechanisms operating all over the world. It is analyzed that the fault ratio of such mechanism is far less than that of other mechanism. 4. Module design The breaker is of module design, which simplifies the structure, increases the reliability and reduces the maintenance.