DocumentCode
1456459
Title
Flashing of D-C machines caused by short circuits
Author
Mcclinton, A. T. ; O´connor, J. P.
Author_Institution
Naval Research Laboratory, Washington, D. C.
Volume
72
Issue
6
fYear
1953
fDate
6/1/1953 12:00:00 AM
Firstpage
510
Lastpage
510
Abstract
STUDIES MADE ON THE flashover characteristics of two d-c machines revealed in part the mechanism of flashover as a result of short circuits. Experimental data obtained from oscillographic records and from high-speed motion pictures substantiated the concepts of arcing currents and flashing currents as follows: 1. Arcing current is related to commutation and produces ions over the surface of the commutator. 2. Flashing current is in the opposite direction to arcing current. 3. Flashing results from the ionized film of gas that envelopes the commutator and is initiated where the brush-to-commutator voltage is high enough to sustain an arc with the ionized gases present.
Keywords
Brushes; Commutation; Flashover; Generators; Motion pictures; Solids; Transient analysis;
fLanguage
English
Journal_Title
Electrical Engineering
Publisher
ieee
ISSN
0095-9197
Type
jour
DOI
10.1109/EE.1953.6438063
Filename
6438063
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