In this paper, the main reason of bunch - drop accident of ceramicinsulator in transmission line has been analyzed and found out, then some relevant countermeasures have been presented.
针对运行中瓷质绝缘子掉串事故进行分析，找出事故的主要原因，并提出相应的防范措施。
2
Ceramicinsulator is widely used in alternating and direct current transmission system. But there exist some problems when using ceramicinsulator in direct current transmission system.
瓷绝缘子广泛使用在交直流输电系统中，但在直流输电系统中使用还存在很多问题。
3
The cube BN grinding wheel was adopted to grind electric ceramicinsulator, and the residual stress of insulators was analysed by the X-ray diffraction (XRD) technique.