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

Volume

1

fYear

2005

Firstpage

40

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulating Materials, 2005. (ISEIM 2005). Proceedings of 2005 International Symposium on

Print_ISBN

4-88686-063-X

Type

conf

DOI

10.1109/ISEIM.2005.193316

Filename

1496037