一起非全相保护装置误动作事故分析研究

Analysis of a Non-Full Phase Protection Device Accident

非全相保护是确保开关全相运行的重要保障。文章介绍了一起因直流失地导致的非全相保护误动作事故,通过现场检查、故障录波等手段,确认了事故发生的原因是直流失地、接线错误以及继电器功率过小。通过分析该起事故,提出了合理的改善和防范措施,以杜绝该类事故的发生。

Non-full phase protection is an important guarantee to ensure the full-phase operation of the switch. A non-full phase protection accident caused by direct loss of ground is introduced, and the causes of the accident are confirmed by means of on-site inspection and fault recording as direct loss of ground, wiring errors and low relay power. Through the analysis of the accident, reasonable improvement and preventive measures are proposed to prevent the occurrence of such accidents.