Influence of Absorbed Gas in Silicone Rubber on Electrical Tree Initiation

Author

Kamiya, Y. ; Muramoto, Y. ; Shimizu, N.

Author_Institution

Department of Electrical and Electronic Eng. Meijo University, Tempaku, Nagoya, 468-8502, Japan. E-mail: m0633005@ccmailg.meijo-u.ac.jp

fYear

2007

fDate

8-13 July 2007

Firstpage

134

Lastpage

137

Abstract

Silicone rubber (SiR) has various excellent characteristics. The use of SiR is increasing as an insulating material of cable joint in power transmission line in recent years. In SiR, the electrical tree initiation voltage is increased by vacuum evacuation, and it decreases with time after air is again impregnated. In polyethylene, it is known that electrical tree initiation voltage is increased by SF6 impregnation. In this paper, we will report the influence of SF6 impregnation on electrical tree initiation characteristic in SiR with and without vacuum evacuation. Without vacuum evacuation, the electrical tree initiation voltage of SF6-impregnated specimen is a little higher than that of untreated specimen. With vacuum evacuation, the electrical tree initiation voltage of SF6-impregnated specimen is a little lower than that of air reimpregnation. In SiR, unlike in polyethylene, the increase of the electrical tree initiation voltage by SF6 impregnation is not clear.

Keywords

Cable insulation; Joining materials; Polyethylene; Power cable insulation; Power cables; Power transmission lines; Rubber; Sulfur hexafluoride; Trees - insulation; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid Dielectrics, 2007. ICSD '07. IEEE International Conference on

Conference_Location

Winchester, UK

Print_ISBN

1-4244-0750-8

Electronic_ISBN

1-4244-0751-6

Type

conf

DOI

10.1109/ICSD.2007.4290771

Filename

4290771