摘要：在冶炼和石化企业中，配电系统大都采用真空断路器进行有效的分合控制。由于冶炼和石化企业所使用的负载是感性负载，断开真空断路器时易产生截流过电压，断路器断口间会产生极高的过电压，真空灭弧室外部易发生闪络、击穿，严重时导致真空灭弧室漏气，损坏真空灭弧室。
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