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US 6,856,122 B2Granted
Thyristor tap changer
AssigneeMaschinenfabrik Reinhausen GmbH
InventorsDieter Dohnal, Hans-Henning Lessmann-Mieske
Life of this patent
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Abstract
A thyristor transformer has a mechanical tap selector and a diverter switch with thyristors. The tap selector is mounted in the oil-filled housing or tank of the transformer and the diverter switch is mounted in a separate housing laterally attached to the tank.
Claims4
A thyristor tap changer for uninterrupted switching over between different winding taps of a tapped transformer under load, comprising:
- a mechanical tap selector for power-free preselection of the respective winding tap which is to be switched over to;
- a load diverter switch with at least one anti-parallel thyristor pair for uninterrupted switching over from the previous to the preselected new winding tap under load;
- a receiving the tap selector and not the load diverter switch and transformer tank which is filled with transformer oil of the tapped transformer;
- a separate housing accommodating the load diverter switch in air together with the at least one anti-parallel thyristor pair, the housing being arranged laterally of the transformer tank and separated therefrom by a leadthrough plate;
- and
- connecting lines running from the tap selector to the load diverter switch led through the leadthrough plates.
3 more elements
Dependencies are inferred from the claim text.