多次重燃过程中高频电弧持续时间的研究

ARCING PERIOD OF HIGH FREQUENCY VACUUM ARC OF THE MULTIPLE REIGNITION PROCESS

利用在固定小开距真空灭弧室中产生高频放电的方法，对多次重燃过程中每次重燃的高频电弧现象进行了研究．实验发现：该高频放电的特征可用冷击穿电压和开距的关系及燃弧后真空间隙热态耐压水平和开距的关系进行描述．测量结果表明：用ＣｕＣｒ触头材料制成的真空灭弧室具有较高的冷击穿强度，是ＡｇＷＣ的３倍．根据能量关系建立了每次重燃时高频电弧持续时间的计算模型。

This paper describes the research work on the arcing period of the multiple reignition process by inducing a high frequency discharge in a small gap length vacuum interrupter. It is found that the discharge phenomena can be described by the relation between thecold breakdown voltage and gap length, and hot voltage withstanding strength and gap length. It is obtained that CuCr has the higher cold breakdown strength which is three times of the AgWCs and is not sensitive to circuit parameters. A model based on energy dissipation of the circuit is developed to calculate the high frequency arcing period and the calculation results meet the measurement very well.