干式电流互感器绝缘试验分析

Analysis on Insulation Test of Dry Current Transformer

介绍了干式电流互感器投入运行后发生的击穿事故,分析了交流耐压试验、介质损耗试验、绝缘电阻试验和局部放电试验4种检测电流互感器绝缘的方法,根据分析和应用可知局部放电试验是目前检测干式电流互感器存在潜伏性缺陷最有效的方法。

This paper introduces the breakdown accident after operation of dry type current transformer,and then analyzes the four methods testing insulation for current transformers, that are AC voltage withstand test, dielectric loss test, insulation-resistance measurement and partial discharge rest. Based on the analysis, the latent faults of the transformers are detected with tests. It is clear from the analysis and application that partial discharge rest is the most effective method to test the latent faults of transformers at present.