... 72.5/126/145/252/550KV Main Characteristics1. The breaker, dead dank style, three phases interoperate, automatic relcosing ... is improved in this breaker, for there is no breaking dead area. The rated short circuit breaking current is 63kA ... . 4. Module designThe breaker is of module design, which simplifies the structure, increases thereliability and reduces the maintenance. Outdoor SF6 Circuit Breaker