通过对真空断路器操作过电压成因的阐述，探讨小水电领域内常用的过电压保护设备。
This paper presents the reasons leading to switch overvoltage for vacuum circuit breaker, and then discusses the usual overvoltage protection device in the small hydropower station.
结合大型电厂开展设备优化检修的需求，对真空断路器状态监测与诊断系统进行了研究。
According to the needs for optimal maintenance of equipment in the power plant, the condition monitoring and diagnosis system of vacuum circuit breaker is studied.
通过对真空断路器在分断过程中三相电流在整个变量周期内的数值模拟，得到了三相电流在不同相位角时对相间磁场的影响。
Through the whole cycle numerical simulation to three phases current in the opening course, the magnetic field influences at different phase angles of three phases current are clearly obtained.
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