Power switch with a double breaking contact arrangement

H - Electricity – 01 – H

Patent

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Details

H01H 73/18 (2006.01)

Patent

CA 2400387

The power switch has a current flow path (7) with two supply terminals (1, 2) and a double breaking contact arrangement. The contact arrangement includes two series connected contact systems (10, 15), in which the current flow path extends in two sections guided parallel to one another. Said sections are formed by an arc (21, 22) during a switching operation. The contact parts (11, 12) of both contact systems are connected to one another and to both supply terminals (1, 2) in such a way that the current in both sections has the same direction. As a result, both arcs (21, 22) attract each other and displacement of the arcs relative to one another is prevented. Both arcs run synchronously into the arc extinction chamber (28, 29) with great reliability and are extinguished therein practically at the same time. The power switch is characterized by high cutout capability.

L'invention concerne un disjoncteur présentant un trajet de courant (7) doté de deux éléments de contact électrique (1, 2) et d'un dispositif de contact à interruption double. Le dispositif de contact contient deux systèmes de contact (10, 15) montés en série et dans lesquels le trajet de courant s'étend dans deux sections parallèles. Lors d'une opération de commutation, ces sections sont respectivement formées par un arc de coupure (21, 22). Les pièces de contact (11, 12) des deux systèmes de contact sont interconnectées et liées aux deux éléments de contact électriques (1, 2) de telle façon que le courant ait le même sens dans les deux sections. Ainsi les deux arcs de coupure (21, 22) s'attirent mutuellement, ce qui permet d'éviter un déplacement des arcs de coupure l'un par rapport à l'autre. De plus, les deux arcs de coupure prénètrent, avec une grande certitude, de manière synchrone dans les chambres d'extinction d'arc (28, 29) où ils s'éteignent quasiment simultanément. Par conséquent, ce disjoncteur se distingue par une grande capacité de coupure.

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