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vacuum circuit breaker

   Also found in: Acronyms 0.01 sec.
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.
vacuum circuit breaker
An electrical circuit breaker in which the contacts that perform switching and interrupting functions are enclosed in a vacuum.
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is a well-established manufacturer of vacuum circuit breakers and other electrical switchgear components in the People's Republic of China.
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