DocumentCode :
1440953
Title :
Mechanism of insulator flashover under artificial rain
Author :
Rizk, Farouk A.M.
Author_Institution :
Hydro-Québec, Institute of Research, Varennes, Canada
Volume :
122
Issue :
4
fYear :
1975
fDate :
4/1/1975 12:00:00 AM
Firstpage :
449
Lastpage :
454
Abstract :
The paper gives a brief description of the variation of insulation-surface conductance under artificial rain from dry conditions until steady-state wetting is achieved. The effect of wetting on insulator voltage distribution is examined. Wet flashover tests with alternating voltage and switching impulses of both polarities on simple insulator models as well as long insulator chains and supporting columns are described with a view to clarifying the flashover mechanism. Comparison is made between conventional artificial rain and pulsating rain obtained from special wettest apparatus which permits longer spraying distances. An account is given of the variation of the dispersion of the flashover voltage under different test conditions.
Keywords :
flashover; insulation testing; insulators; rain; artificial rain; insulator flashover; pulsating rain; surface conductance; switching impulse; tests with alternating voltage; voltage distribution; wetting;
fLanguage :
English
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
Publisher :
iet
ISSN :
0020-3270
Type :
jour
DOI :
10.1049/piee.1975.0124
Filename :
5253170
Link To Document :
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