电动机保护误发接地报警的原因分析及处理

Cause Analysis and Treatment of False Grounding Alarm in Motor Protection

某核电厂6 kV循环水泵机械部分在做定期维护时,因两点接地产生环流,就地电动机保护装置和主控室报警系统误发“循环水泵电机接地”报警。对上述误报警的原因进行了分析并提出解决方案,对今后解决接地环流的问题提供了方向。

When the mechanical part of 6 kV circulating water pump in a nuclear power plant was under regular maintenance,the circulating current was generated due to two-point grounding,and the local motor protection device and the alarm system in the main control room mistakenly sent the alarm of"circulating water pump motor grounding".The causes of the above false alarm are analyzed and the solutions are put forward,which provides a direction for solving the problem of grounding circulation in the future.