摘要
通过对一起10 kV开关烧毁故障的分析,认为开关试验后安措拆除不彻底,在送电过程中三相电源侧触头残留有铅丝,开关在接近工作位置时动静触头沿铅丝放电形成电弧,三相弧光短路是造成开关烧毁的主要原因,由此说明了设备检修后三级验收及开关送电前检查工作的重要性,并提出相应的防范措施。
Through the analysis of a 10 kV Switch burning fault,it is considered that the safety measures are not removed thoroughly after the switch test.In the process of power transmission,there is residual lead wire in the contacts of three-phase power supply side.When the switch is close to the working position,the moving and static contacts discharge along the lead wire to form an arc.Three phase arc short circuit is the main cause of switch burnout.The importance of three-level acceptance after equipment maintenance and inspection before switch power transmission is explained,and the corresponding preventive measures are put forward.
作者
关延伟
李雷
赵建利
GUAN Yanwei;LI Lei;ZHAO Jianli(Rundian Energy Science and Technology Co.,Ltd.,Zhengzhou 450000,China;China Resources Power Jiaozuo Co.,Ltd.,Jiaozuo 454002,China)
出处
《电工技术》
2021年第11期149-150,155,共3页
Electric Engineering
关键词
开关烧毁
铅丝
送电前检查
三级验收
switch burned
lead wire
check before power transmission
three-level acceptance