Insulation Failure Mechanisms of Power Generators [Feature Article]

Author

Brutsch, R. ; Tari, Makoto ; Frohlich, K. ; Weiers, Tilman ; Vogelsang, Ruben

Author_Institution

Von Roll Switzerland Ltd., Breitenbach

Volume

24

Issue

4

fYear

2008

Firstpage

17

Lastpage

25

Abstract

This article discusses about the abnormal or faulty operating condition of premature power generator insulation failures that can be classified as: design failures, material failures, manufacturing failures and maintenance failures. The final failure of the mica insulation is usually caused by electric breakdown through a tree channel. Formation and propagation of trees in the insulation therefore reflect the aging process of the insulation.

Keywords

ageing; electric generators; fault trees; machine insulation; machine protection; machine testing; mica; trees (electrical); aging process; corona protection; design failures; electric breakdown; faulty operating condition; maintenance failures; manufacturing failures; material failures; mica insulation failure; power generators; tree channel propagation; Aging; Bars; Dielectrics and electrical insulation; Electric breakdown; Failure analysis; Power generation; Rotating machines; Thermal stresses; Trees - insulation; Voltage;

fLanguage

English

Journal_Title

Electrical Insulation Magazine, IEEE

Publisher

ieee

ISSN

0883-7554

Type

jour

DOI

10.1109/MEI.2008.4581636

Filename

4581636