Description
如周边有凹痕缝隙则会出现泄压现象.在开断较大电流或机构分闸略有阻滞时.电弧拉不断开关则要爆炸。如灭弧片中心孔周边有大片凹痕.而周边是合缝的也有较大的危险,因为,上下两片灭弧室导电杆在合闸位置时,灭弧室是闭合的,两边的气囊的储压能力是设计好的,但如有了凹痕则增加了气囊的容积。可能造成2个后果:①开关燃弧距离大,燃弧充分,使气囊容量扩大,从而延长了吹弧的时间;②气囊设计压力达不到、降低了灭弧能力,如开关动作异常.则可造成开关本体爆炸
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