vacuum circuit breaker


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vacuum circuit breaker

[′vak·yəm ′sər·kət ‚brā·kər]
(electricity)
A circuit breaker in which a pair of contacts is hermetically sealed in a vacuum envelope; the contacts are separated by using a bellows to move one of them; an arc is produced by metallic vapor boiled from the electrodes, and is extinguished when the vapor particles condense on solid surfaces.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

vacuum circuit breaker

An electrical circuit breaker in which the contacts that perform switching and interrupting functions are enclosed in a vacuum.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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