一起三相不一致保护动作原因分析  

Analysis of Reasons for Three Phase Inconsistent Protection Action

作　　者：刘云 LIU Yun(Yunnan Electric Power Technology Co.,Ltd.,Kunming 650217,China)

机构地区：[1]云南电力技术有限责任公司,云南昆明650217

出　　处：《电工技术》2025年第5期163-165,共3页Electric Engineering

摘　　要：介绍了一起220kV断路器A相发生瞬时性故障,约130ms后B、C相跳闸的事件处理过程。通过对二次回路的逐一排查和试验,分析跳闸的原因,确认跳闸的原因是断路器本体三相不一致时间继电器得电后接点抖动闭合,导致本体三相不一致出口回路导通。最后提出了相应的改进措施,为以后此类事故的分析和处理提供参考。This article introduces the handling process of an instantaneous fault that occurred in phase A of a 220 kV circuit breaker,and the B and C phases tripped after about 130 ms.Through a thorough investigation and testing of the secondary circuit,the cause of the trip was analyzed,and it was ultimately confirmed that the cause of the trip was due to the three-phase inconsistency of the circuit breaker body.After the relay was powered on,the contact shook and closed,causing the outlet circuit of the three-phase inconsistency of the body to conduct.Corresponding improvement measures have been proposed to provide reference for the analysis and handling of such accidents in the future.

关 键 词：三相不一致 时间继电器 接点抖动 

分 类 号：TM561[电气工程—电器]