This paper analyses the results of testing, and on the basis of current oscillogram after arc current zero, devides a. c. arc current-zero period phenomena into four different types.

• 本文分析了电弧电流零点后电流波形的试验结果；把电弧电流零区现象分为四种不同的类型；提出了交流电弧两种电流过零现象及电弧重燃与熄灭过程的一些新看法.