Maschinenfabrik Reinhausen Gmbh

Thomas Strof

Wolfgang Albrecht

Uwe Kaltenborn

Alfred Bieringer

Andreas Stocker

Eduard Zerr

Anatoli Saveliev

Gerhard Baeuml

Christian Hurm

Martin Hausmann

Gerhard BÄUML

The invention relates to a switching arrangement () with a pre-selector () for a power transformer () which has multiple windings (). The pre-selector is designed to optionally connect at least one first winding () to one of the two end contacts () of at least one second winding (). At least one first switch is arranged in the connection between the pre-selector () and the first winding (), thereby allowing the pre-selector to be switched in an arc-free manner and thus in a gas-free manner as well.

Switching system with preselector

The invention relates to a step switch, comprising a pre-selector and a fine selector. The invention is characterized in that the step switch has a connection () between the pre-selector and the fine selector (), at least one coupling switch () being arranged in said connection. A pre-selector can be switched in a largely gas-free manner by means of said switchable connection with the aid of the fine selector.

The invention relates to a method for performing a switching process in an on-load tap changer between winding taps of a tapped transformer. The switching process for an on-load tap changer is subdivided into a plurality of phases according to the reactor switching principle. In these phases, the switching contacts in use are monitored during the actuation and are completely opened or closed by capacitors in the controller in the event of failure of the energy supply. Thereby critical switching states are prevented.

Method for performing a switching process in an on-load tap changer

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Gumboldskirchen, Austria

Thomas Strof