Abstract: Arc reignition is the most common phenomenon of short circuit interruption process,and it has direct impact on short circuit breaking capacity.Because arc reignition is affected by various design parameters,it is difficult to be analyzed quantificationally.In this paper,a metal splitter voltage measurement equipment system was used to analyze arc reignition and post-arc current.Thermal breakdown and electrical breakdown are two reignition phenomena of short circuit breaking process,this paper presented the physical process analysis with these measured data for both two reignition phenomena.Finally,the improvement advices upon arc chamber system were given.

Key words: arc reignition, short circuit breaking, splitter voltage, post-arc current, arc extinguishing system