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真空接触器,是近几年发展起来的一种新型电器。它的主触头是封闭在抽成真空的灭弧室中,以真空作绝缘和灭弧介质来分断电路。它具有分断能力强、体积小、重量轻等多种优点,因此在煤炭系统中也得到了越来越广泛的推广应用。但是,真空接触器主回路触头开距很小。如 CKJ—250/660型低压真空交流接触器,真空开关管的触头开距只有1.9±0.1mm,一旦真空管出现“漏气”等故障,就会导致接触器自行导通,将会产生类似以下情况的严重事故。1984年元月13日早6点40分,在康城煤矿
Vacuum contactor, developed in recent years, a new type of electrical appliances. Its main contact is enclosed in a vacuum interrupter, vacuum insulated and interrupter medium to break the circuit. It has a strong breaking capacity, small size, light weight and other advantages, so in the coal system has also been more widely used. However, the vacuum contactor main circuit contact opening is very small. Such as CKJ-250/660 low-voltage vacuum AC contactor, vacuum switch contact opening only 1.9 ± 0.1mm, once the vacuum tube “leak” and other failures, it will lead to contactor self-conduction, will have a similar The following serious accidents. January 6, 1984 6:40, at Cannes Coal Mine