High and low intensity slot discharge

Author

Wilson, A.

Author_Institution

Nat. Grid Res. & Dev. Centre, Leatherhead, UK

fYear

1990

fDate

3-6 Jun 1990

Firstpage

363

Lastpage

366

Abstract

The author describes some of the work in the area of slot discharges undertaken at the CERL-CEGB Research Laboratories (now National Grid R&D Centre) since 1980. Slot discharge mechanisms are considered, and results of laboratory studies using bar and sheet samples are examined. Slot discharge damage is a problem encountered with epoxy micapaper systems used in large machine windings. The main insulation system has been developed to be resistant to partial discharge attack. However, research has shown that slot discharge can include other types of gas discharge such as surface discharge and a sustained discharge which is probably a glow-to-arc transition

Keywords

electric breakdown of gases; machine insulation; machine windings; surface discharges; CERL-CEGB Research Laboratories; National Grid R&D Centre; air filled electric machines; discharge damage; discharge mechanisms; epoxy micapaper systems; gas breakdown; gas discharge; glow-to-arc transition; high intensity discharge; insulation system; large machine windings; low intensity discharge; partial discharge attack; slot discharge; surface discharge; Conductivity; Corona; Degradation; Insulation; Laboratories; Lamination; Manufacturing; Research and development; Surface discharges; Vibrations;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 1990., Conference Record of the 1990 IEEE International Symposium on

Conference_Location

Toronto, Ont.

ISSN

1089-084X

Type

conf

DOI

10.1109/ELINSL.1990.109774

Filename

109774