Additional device in a current limiter for limiting current...

H - Electricity – 02 – H

Patent

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H02H 9/02 (2006.01) H02H 3/05 (2006.01)

Patent

CA 2577435

An additional device in a current limiter for limiting current in the event of a fault is comprised of an electric additional valve that is connected in series with and has the same conducting direction as an associated main valve. Two series-connected valve branches of this type having opposite conduction directions bypass two series-connected current limiter inductors. Both additional valves are each bypassed by an identical passively complex connection for limiting current in the event of a fault. The current limiter device is electrically not seen up to the nominal operation but, in the event of a fault even when the main valves break down, effectively limits the short- circuit current to a predetermined extent.

L'invention concerne un dispositif additionnel dans un limiteur de courant, pour limiter le courant en cas d'erreur, qui comprend une soupape électrique additionnelle, montée en série et présentant le même sens de conduction que la soupape électrique principale correspondante. Deux branches de soupape de ce type montées mutuellement en série et présentant un sens de conduction opposé pontent deux bobines d'arrêt de limitation de courant, montées mutuellement en série. Les deux soupapes électriques additionnelles sont pontées, dans chaque cas, par un câblage complexe passif identique pour limiter le courant en cas d'erreur. Le dispositif de limitation de courant n'est pas conçu sur le plan électrique jusqu'au fonctionnement nominal, mais limite de manière efficace, en cas d'erreur, y compris en cas de claquage des soupapes électriques principales, le courant de court-circuit à une valeur prédéterminée.

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