一起斷路器合閘不到位故障處置流程及原因分析
李清泉,李相棟,馮知海
(國網(wǎng)山東省電力公司超高壓公司,山東 濟南 250018)
摘 要:介紹了一起 500 kV 彈簧操動機構(gòu)斷路器合閘不到位故障,并給出了事故緊急處理方案,來避免故障斷路器發(fā)展為燃弧、爆炸事故。通過現(xiàn)場設(shè)備檢查,對事故原因進行了分析,最終確定事故的直接原因為脫出的銷軸與機架腰形孔產(chǎn)生碰撞卡死,導致合閘不到位;根本原因為固定銷軸的螺釘未裝配或因松動而脫落。提出了相應(yīng)的排查和應(yīng)對措施,以避免類似故障再次發(fā)生。
關(guān)鍵詞: 斷路器;操動機構(gòu);銷軸;合閘不到位
中圖分類號:TM561 文獻標識碼:B 文章編號:1007-3175(2023)06-0044-05
Analysis of Disposal Process and Causes of a
Circuit Breaker Inadequate Closing Fault
LI Qing-quan, LI Xiang-dong, FENG Zhi-hai
(State Grid Shandong Electric Extrahigh Voltage Company, Jinan 250118, China)
Abstract: An inadequate closing fault of the circuit breaker occurring to 500 kV spring operating mechanism is introduced, and the corresponding emergency treatment scheme is proposed to avoid this circuit breaker fault becoming an arc burning or explosion accident. After checking equipments on site, the paper analyzes causes of this fault. The collision between the detached pin shaft and the waist-shaped hole of the frame led to inadequate closing of the circuit breaker, which is the direct cause. While the root cause is that screws holding the pin shaft are not assembled or loose. Therefore, the paper proposes corresponding checking measures and solutions to avoid the recurrence of such faults.
Key words: circuit breaker; operating mechanism; pin shaft; inadequate closing
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