Quick-action mechanical switching point
AssigneeABB Hochspannungstechnik AG
InventorsKlaus Fröhlich, Walter Holaus, Kurt Kaltenegger, Michael Steurer
Life of this patent
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Abstract
The switching point in a high or medium voltage switch contains two stationary switch pieces which are of cylindrical design and led coaxially into one another, to form an annular gap. A movable bridge switch piece constructed in the form of a contact ring fits into the annular gap when the switching point is closed. An electrodynamic drive comprising two coils moves the contact ring in the axial direction. By virtue of the low mass of the contact ring, the single moving part of the switching point can be switched on and off very quickly and efficiently.
Claims11
A switching point in a high or medium voltage switch, said switching point comprising:
- two stationary switch pieces;
- a movable, electrically conductive bridge switch piece which short-circuits the stationary switch pieces when the switching point is closed;
- a drive including two coils for generating an induction current in the bridge switch piece and a power electronic control unit for feeding the coils, in order to move the bridge switch piece;
- the stationary switch pieces, the bridge switch piece and the coils being arranged symmetrically with respect to an axis;
- the stationary switch pieces being constructed as cylinders led into one another and bounding an annular gap;
- the bridge switch piece being constructed in the form of a contact ring which can be moved in the axial direction and which fits into the annular gap when the switching point is closed;
- and
- the two coils being arranged on either side of the contact ring and offset with respect to each other in the axial direction.
Dependencies are inferred from the claim text.