Title :
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
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;
Journal_Title :
Electrical Insulation Magazine, IEEE
DOI :
10.1109/MEI.2008.4581636
