中文摘要：

基于真空和SF6气体两种不同灭弧介质的灭弧特点，分析真空灭弧室与SR6灭弧室串联组成的混合断路器可获得更大开断能力的机理。根据混合断路器开断能力提高机理提出对其操动控制机构的要求，并将额定电压12kV，开断电流20kA的真空断路器与额定电压12kV，开断电流6．3kA的SF6断路器串联搭建光控模块式混合断路器实验模型。对实验模型进行短路电流开断测试，并对比单个SF6断路器与基于相SF6断路器串联真空断路器的混合断路器的短路电流开断能力。得出sF6断路器与混合断路器的开断容量曲线，混合断路器相比sF6断路器开断容量增益倍数在1.4以上。证明混合断路器可在不增加SF6气体使用量的前提下提高短路电流开断容量。

英文摘要：

A novel type of hybrid, light-controlled circuit-breaker was developed by combining the vacuum inter- rupter and the SF6 interrupter in series to improve the breaking capacity. To characterize its breaking capacity gain, a pro- totyped hybrid circuit breaker was designed and constructed,consisting of a vacuum interrupter （a rated voltage of 12 kV and a breaking current of 20 kA） ,a SF6 interrupter （a rated voltage of 12 kV and a break current of 6.3 kA） and a light- control module. The preliminary test results show that the breaking-capacity gain of the newly-developed hybrid circuit breaker is 1.4 times higher than that of the SF6 interrupter, without increasing the amount of SF6 gas. The operating mech- anisms and possible improvements of the hybrid circuit-breaker were also tentatively discussed.