VACUUM CIRCUIT BREAKER

VACUUM CIRCUIT BREAKER

PURPOSE:To provide a vacuum circuit breaker of improving reliability by reducing damage of a contact to eliminate decrease of dielectric strength performance and also suppressing the generation of restrike. CONSTITUTION:When assumed (d) for mean dielectric breakdown distance at maximum voltage appli...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: KAMIKAWAJI TORU
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
SELECTORS
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Beschreibung
Zusammenfassung:PURPOSE:To provide a vacuum circuit breaker of improving reliability by reducing damage of a contact to eliminate decrease of dielectric strength performance and also suppressing the generation of restrike. CONSTITUTION:When assumed (d) for mean dielectric breakdown distance at maximum voltage applied across a pair of electrodes in a vacuum vessel and (f) for frequency of a rush current flowing at the time of closing the electrode, a mean closing speed in an inter-electrode clearance of (d) or less is set so as to obtain a relation where v=(20/11).f.d to (20/9).f.d. Thus, an optimum range of the closing speed of the electrode is specified.