屏蔽法测量金属氧化物避雷器的泄漏电流

摘要

Leakage current is an important parameter of characterization of its performance, as the growth of the running time , ex-perimental value will be critical in specification, so that it can not make an accurate judgment. This paper based on the 500 kV pre-ventive test of metal oxide surge arrester as an example, analyzes the influencing factors of leakage current in arrester test and the reason for great error in the conventional test method, proposed in the test with the shielding wire method that is commonly known as shielding arrest test experiment, in order to reduce the measurement error and the workload.%泄漏电流是表征其性能的重要参数，随着运行时间的增长，试验值临界于规程值，不能作出准确的判断。以500 kV金属氧化物避雷器的预防性试验为例，分析了避雷器试验中影响泄漏电流的因素及常规试验方法测量误差大的原因，提出了在试验时用屏蔽线进行避雷器试验的俗称屏蔽法的试验方法，以减小测量误差及工作量。