有时合闸操作完成后合闸接触器仍不能返回。
After the closing operation the closing contactor sometimes cannot recover.
对三相电容器的暂态过程进行了研究，提出采用接触器和小电流晶闸管组成混合开关，实现了合闸时无冲击电流及分断时无电弧。
This paper researches on three phase capacitor transients, presents a combined switch constructed of contactor and low current thyristors to realize non surge close and non arcing break.
断路器控制回路的合闸线圈和接触器烧毁现象是变电运行工作中经常遇到的普遍问题。
The burn of circuit breaker closing coils and contactors is a common problem in the switchyard operates.
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