电流互感器二次回路接地故障分析与预防措施

Analysis and Preventive Measure of Grounding Fault of Secondary Circuit of Current Transformer

阐述一起发电厂电流互感器二次回路接地故障的检查及处理,并通过比较回路不同点电流,分析查找回路接地故障点,及采用的在线处理方案。根据现场检修和施工过程中发现的问题,总结电流互感器二次回路接地故障排查方法、现场易发生接地故障之处和预防电流互感器二次回路接地故障的一些措施。

This article introduces a case of finding the ground fault point of the loop by comparing the currents at different points of the loop and the online treatment scheme is adopted.According to the problems found during on-site maintenance and constrution,summarize the troubleshooting methods of the secondary circuit grounding fault of current transformer,the places where ground fault are prone to occur on site,and some measures to prevent the secondary circuit grounding fault of current transformer.