Surface breakdown characteristics of silicone oil for electric power apparatus

Author

Wada, Junichi ; Nakajima, Akitoshi ; Miyahara, Hideyuki ; Takuma, Tadasu ; Yanabu, Satoru ; Okabe, Shigemitsu ; Kohtoh, Masanori

Author_Institution

Tokyo Denki Univ.

Volume

13

Issue

4

fYear

2006

Firstpage

830

Lastpage

837

Abstract

This paper describes the surface breakdown characteristics of silicone oil which has the possibility of application to innovative switchgears and transformers as an insulating medium. At the first step, we have experimentally studied the impulse breakdown characteristics of the configuration with a triple-junction where a solid insulator is in contact with the electrode. The test configuration consists of solid material (Nomexreg or pressboard) and liquid insulation oil (silicone or mineral oil). We have discussed the experimental results based on the maximal electric field at the triple-junction. As the second step, we have studied the configuration which may improve the surface breakdown characteristics by lowering the electric field on the insulator surface

Keywords

insulating oils; power apparatus; silicone insulation; surface discharges; discharge inception voltage; electric field; electric power apparatus; electrode; impulse breakdown; insulating medium; silicone oil; solid insulator; surface breakdown; switchgear; transformer; triple-junction configuration; Dielectric liquids; Electric breakdown; Electrodes; Insulation testing; Materials testing; Minerals; Oil insulation; Petroleum; Power transformer insulation; Solids;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2006.1667742

Filename

1667742