Insulation properties of highly pressurized dry air-effects of anodic oxide coating and surface roughness of electrodes on breakdown voltage

Author

Inoue, Naoko ; Sato, Seiki ; Yoshida, Takafumi ; Oida, Yuki ; Kumada, A. ; Hidaka, K.

Author_Institution

Adv. Tecnology R&D Center, Mitsubishi Electr. Corp., Amagasaki, Japan

Volume

21

Issue

5

fYear

2014

fDate

Oct. 2014

Firstpage

2081

Lastpage

2087

Abstract

Dry air has been introduced to gas-insulated switchgears as an environmentally friendly insulation medium for SF₆ gas. Since its insulation strength is about onethird of SF₆ gas, to grasp the insulation properties of highly pressurized dry air is necessary to apply dry air insulation to further high voltage equipments. In this paper, to consider smaller products and higher voltage ratings, insulation properties in highly pressurized dry air was investigated. Especially, pressure dependence, surface roughness dependence and the effect of surface processes were investigated.

Keywords

SF₆ insulation; air insulation; electrodes; gas insulated switchgear; surface roughness; SF6 gas; anodic oxide coating; breakdown voltage; dry air insulation; dry air-effects; electrodes; gas-insulated switchgears; surface roughness; Coatings; Electrodes; Rough surfaces; Sulfur hexafluoride; Surface roughness; Surface treatment; Dry air; anodic oxide coating; surface roughness;

fLanguage

English

Journal_Title

Dielectrics and Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

1070-9878

Type

jour

DOI

10.1109/TDEI.2014.003836

Filename

6927336