A ROTATING ARC GAS PUMP FOR CIRCUIT BREAKING AND OTHER APPLICATIONS

Citation
Mg. Ennis et al., A ROTATING ARC GAS PUMP FOR CIRCUIT BREAKING AND OTHER APPLICATIONS, IEEE transactions on plasma science, 25(5), 1997, pp. 961-966
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Phsycs, Fluid & Plasmas
ISSN journal
0093-3813
Volume
25
Issue
5
Year of publication
1997
Pages
961 - 966
Database
ISI
SICI code
0093-3813(1997)25:5<961:ARAGPF>2.0.ZU;2-#
Abstract
A rotating are circuit breaker is described which uses an auxiliary cu rrent source to generate the magnetic field for driving the are. Test results obtained using optical fiber measurement systems have shown th at there are three main arcing phases, Initially the are rotates at an essentially constant but low velocity, subsequently its velocity osci llates between this and much higher values, and finally the are plasma may become diffuse in nature, Test results obtained with dielectric s trength probes have indicated that a unidirectional flow of are heated gas is generated, The flow is away from the moving contact of the int errupter so promoting good dielectric strength in this critical contac t region, The combination of the optical fiber and dielectric probe re sults indicates two possible modes of gas pumping represented, respect ively, by a fan and a piston-type action of the are. Simplified analyt ical models for both modes are developed with predictions obtained sho wing good agreement with the experimental results, Discussion of exper imental results suggests that the transition from oscillatory velocity changes to diffuse arcing represents an important parameter for scali ng the geometries of future interrupters and are heaters.