Title :
An experimental investigation on pre-flashover of alumina in vacuum
Author :
Ding, Lijian ; Li, C.R. ; Tu, Youping ; Wang, Wei
Author_Institution :
Beijing Key Lab. of High Voltage & EMC, North China Electr. Power Univ., Beijing, China
Abstract :
The flashover of insulators in vacuum is the main factor to limit the performance of insulation in vacuum insulation system. It is believed that the pre-flashover phenomena would play a very important role in the procedure of the flashover in the interface between the insulators and vacuum. This paper is mainly concerned on the pre-flashover phenomena of alumina insulators in vacuum. There are 24 different types of alumina insulators were tested with a 0.7/4 μs pulsed voltage under a 1x10-4 Pa vacuum. The observed pre-flashover phenomena were classified and the pre-flash-over characteristics were concluded. It is useful to study further on the flashover mechanism in vacuum.
Keywords :
alumina; flashover; insulator testing; vacuum insulation; alumina insulators testing; insulators flashover; vacuum alumina preflashover; vacuum insulation system; Circuit testing; Dielectrics and electrical insulation; Electrodes; Flashover; Insulator testing; Optical surface waves; Shape; System testing; Vacuum systems; Voltage;
Conference_Titel :
Electrical Insulating Materials, 2005. (ISEIM 2005). Proceedings of 2005 International Symposium on
Print_ISBN :
4-88686-063-X
DOI :
10.1109/ISEIM.2005.193316
