DocumentCode
1431884
Title
Arc diameter in a gas blast
Author
Siddons, D.J.
Author_Institution
Central Electricity Generating Board, Marchwood Engineering Laboratories, Southampton, UK
Volume
119
Issue
9
fYear
1972
fDate
9/1/1972 12:00:00 AM
Firstpage
1423
Lastpage
1425
Abstract
Arc-boundary profiles have been measured with sonic axial gas flow in a cylindrical constrictor using nitrogen (a convenient equivalent for air), sulphur hexafluoride and argon. The current range was 0.1¿2.4 kA, the constrictor pressures were 2 and 6 bar and arc lengths were up to 55 mm. The arc expansion indicates that convection is dominant and that theories for a discharge transition region are appropriate. The visible region of the arc spreads over the upstream electrode, probably due to metal vaporisation and gas-flow effects.
Keywords
air blast circuit breakers; circuit-breaking arcs; Ar; N2; SF6; air blast circuit breakers; arc boundary profile measurement; arc diameter; arc expansion; arc lengths up to 55 cm; circuit breaking arcs; constriction pressures 2 to 6 bar; current range 0.1 to 2.4 kA; cylindrical constrictor; discharge transition region; gas blast; sonic axial gas flow;
fLanguage
English
Journal_Title
Electrical Engineers, Proceedings of the Institution of
Publisher
iet
ISSN
0020-3270
Type
jour
DOI
10.1049/piee.1972.0281
Filename
5251389
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