GW5-126型隔离开关触头烧损故障分析及对策

Failure Analysis and Countermeasures for GW5-126 Disconnector Contacts Burning

针对GW5-126型母线隔离开关在倒母线操作时经常出现触头烧损的故障,介绍了隔离开关开合母线转换电流的原理,并以某变电站为例进行了实例计算。随后,分析了母线隔离开关触头烧损的原因,给出了GW5-126型隔离开关引弧装置的加装方案以及一些其他提高隔离开关开合母线转换电流能力的措施。

In order to solve the problem that the GW5-126 disconnector contacts often burning when reversing the busbar,the principle of the bus transfer current switching is introduced.At the same time,taking a substation for example,the calculation results are presented.Then,by means of analysing the reasons of the disconnector contact burning,the scheme of installing the arc striking device is given,and some other measures for improving the ability of switching bus transfer current are provided.