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.
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。
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In addition, startup protection circuit and overvoltage protection circuit is also designed, which raise stability of power device IGBT further, thus strengthen the ability to deal with trouble.