短间隙真空电弧的动态图像

摘要

用动态图像高速微机数据采集系统对短间隙中的真空电弧的形态及其动态演变过程进行了光测研究.初步发现在短间隙条件下，平板触头间隙中真空电弧形成阳极斑点的临界电流小于长间隙中的临界电流；从电流开断性能来讲，纵磁触头的优越性在短间隙条件下体现得尤为明显.%In this paper,the dynamic images of vacuum arc within short gaps were investigated by a system called the vacuum arc dynamic image high-speed sampling computer system (abbr,VAIS). The critical current of anode spots formation withinshort gaps is lower than that within long gaps. And the contacts with axial magnetic field are of greater advantages than the less series, and under anode spot free, of high interrupting ability.