US 12,456,590 B2
On-load tap changer and method for actuating an on-load tap changer
Christian Hammer, Regensburg (DE)
Assigned to MASCHINENFABRIK REINHAUSEN GMBH, Regensburg (DE)
Appl. No. 18/044,208
Filed by MASCHINENFABRIK REINHAUSEN GMBH, Regensburg (DE)
PCT Filed Aug. 9, 2021, PCT No. PCT/EP2021/072170
§ 371(c)(1), (2) Date Mar. 7, 2023,
PCT Pub. No. WO2022/053239, PCT Pub. Date Mar. 17, 2022.
Claims priority of application No. 10 2020 123 455.4 (DE), filed on Sep. 9, 2020.
Prior Publication US 2024/0029966 A1, Jan. 25, 2024
Int. Cl. H01H 9/00 (2006.01)
CPC H01H 9/0016 (2013.01) [H01H 9/0027 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An on-load tap-changer for uninterrupted switching between winding taps of a tap-changing transformer, the on-load tap-changer comprising:
a diverter switch configured to perform a switchover from a first fixed contact to a second fixed contact of the on-load tap-changer; and
a selector configured to powerlessly preselect fixed contacts, the fixed contacts being the first fixed contact and the second fixed contact, the selector comprising a first selector arm and a second selector arm which are configured to be actuated independently of one another and configured to contact each of the fixed contacts,
wherein the diverter switch comprises, for performing the switchover:
a main path comprising a mechanical switching element, the main path being configured to connect the first selector arm to a load take-off lead via the mechanical switching element,
a first auxiliary path comprising a first semiconductor switching element, the first auxiliary path being parallel to the main path and configured to connect the first selector arm to the load take-off lead, and
a second auxiliary path comprising a second semiconductor switching element, the second auxiliary path being configured to connect the second selector arm to the load take-off lead,
wherein the on-load tap-changer is configured to selectively assume:
a first stationary position, in which the first selector arm and the second selector arm contact the first fixed contact and the first selector arm is connected to the load take-off lead via the main path, and
a second stationary position, in which the first selector arm and the second selector arm contact the second fixed contact and the first selector arm is connected to the load take-off lead via the main path.