PUFFER CIRCUIT BREAKER WITH REDUCED PUFFER VOLUME PRESSURE

PUFFER CIRCUIT BREAKER WITH REDUCED PUFFER VOLUME PRESSURE

PROBLEM TO BE SOLVED: To enable to increase switching speed and/or reduce energy of required driving operation. SOLUTION: A circuit breaker comprises a puffer volume 9 and at least one filling valve 16 structured to allow a flow of gas into the puffer volume 9 upon expansion of the same. A closing m...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: FRISK JOHAN, HEIERMEIER HELMUT, KEHR TIMO, KAMMERL KURT
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
SELECTORS
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Zusammenfassung:PROBLEM TO BE SOLVED: To enable to increase switching speed and/or reduce energy of required driving operation. SOLUTION: A circuit breaker comprises a puffer volume 9 and at least one filling valve 16 structured to allow a flow of gas into the puffer volume 9 upon expansion of the same. A closing member 18 is biased in a direction against the flow of gas emitting from the puffer volume 9 such that the filling valve 16 remains open while the pressure accumulated within the puffer volume 9 remains below a given threshold. This allows to keep the pressure in the puffer volume 9 low under low current switching conditions, thereby decreasing the tendency for supersonic flow in the insulating nozzle. COPYRIGHT: (C)2008,JPO&INPIT