Title :
Arc diameter in a gas blast
Author_Institution :
Central Electricity Generating Board, Marchwood Engineering Laboratories, Southampton, UK
fDate :
9/1/1972 12:00:00 AM
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;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1972.0281
