Tap changer with semiconductor switching elements

Details Tap changer with semiconductor switching elements Tap changer with semiconductor switching elements

H - Electricity

01

H

H01H 9/00 (2006.01) H01F 29/04 (2006.01)

Patent

CA 2758035

The invention relates to an on-load tap changer comprising semiconductor switching elements for uninterrupted switching between fixed tap changer contacts which are electrically connected to winding taps of a tapped transformer. Each of the fixed tap changer contacts can be connected to a charge diverter either directly or, during switching, via the semiconductor switching elements that are connected therebetween. According to the invention, the charge diverter has fixed, divided diverting contact pieces in order for the semiconductor switching elements to be electrically isolated from the transformer winding during stationary operation.

Changeur de prises en charge comprenant des éléments de commutation à semi-conducteurs assurant la commutation ininterrompue entre des contacts fixes du changeur de prises qui sont raccordés électriquement à des prises de l'enroulement d'un transformateur à gradins. Chacun des contacts fixes du changeur de prises peut se connecter à une dérivation de charge, soit directement, soit, au cours de la commutation, par l'intermédiaire des éléments de commutation à semi-conducteurs interposés. Selon l'invention, la dérivation de charge comporte des pièces de contact de dérivation fixes séparées, de manière qu'en régime constant, les éléments de commutation à semi-conducteurs soient isolés galvaniquement de l'enroulement du transformateur.

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