【摘要】 采用对固定开距的真空灭体室施加电压使其击穿的方法对与多次重燃过程有密切关系的小开距真空间隙放电现象进行了研究,发现该类放电的特征可用冷击穿电压和开距的关系、燃弧后真空间隙热态耐压强度和开距的关系以及放电时高频重燃半波持续数来进行描述。试验发现用铜铬触头材料制成的真空灭弧室具有最高的冷击穿强度、是银碳化钨的三倍、且对线路的参数不敏感。根据能量关系建立的高频重燃半波数模型可对高频重燃持续的时间进行计算。更多还原

【Abstract】 This paper studies the arc discharge phenomena in a small gap-length(<0. 1mm) vacuum gap, which is closely related to the multiple reignition process. It is found that the discharge phenomena can be described by the relation between the cold breakdown voltage and gap-length, hot voltage withstanding strength and gap-length, and the number of half-frequency arcing discharge. It is obtained that CuCr has the highest 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 calculated the high-frequency arcing period.更多还原