It is found that after stressed by surges the varistors show a decrease in both break-down voltage and nonlinear exponent, and an increase in leakage current.

• 实验结果显示，氧化锌变阻器受突波侵袭后，会生成崩溃电压降低，非欧姆指数值减小，以及漏电流增加等劣化现象。