Gaoya dianqi, 1987 1.简介 当真空断路器触头分开时,会产生金属蒸气电弧放电,在电弧电流超过10kA时,自生磁场会使电弧产生严重的收缩。 触头局部过热不仅会引起触头严重烧损,而且会降低触头的开断能力。这是由于产生高密度金属蒸气的缘故。因而就很有必要研究电弧的运动特性。 以前主要通过光学方法(例如高速摄影法)对装有观察窗的真空灭弧室进行研究。对于实际真空灭弧室,可以利用测量灭弧室周围磁场变化来反映电弧旋转。
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