US 12,142,448 B2
Switch for an on-load tap changer and load transfer switch for an on-load tap changer
Christian Hammer, Regensburg (DE); Silke Wrede, Zeitlarn (DE); and Markus Zintl, Mitterteich (DE)
Assigned to MASCHINENFABRIK REINHAUSEN GMBH, Regensburg (DE)
Appl. No. 17/760,100
Filed by Maschinenfabrik Reinhausen GmbH, Regensburg (DE)
PCT Filed Jan. 29, 2021, PCT No. PCT/EP2021/052053
§ 371(c)(1), (2) Date Aug. 4, 2022,
PCT Pub. No. WO2021/170340, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 10 2020 105 113.1 (DE), filed on Feb. 27, 2020.
Prior Publication US 2023/0045653 A1, Feb. 9, 2023
Int. Cl. H01H 9/38 (2006.01); H01H 9/00 (2006.01); H01H 9/40 (2006.01); H01H 33/66 (2006.01)
CPC H01H 9/0016 (2013.01) [H01H 9/0027 (2013.01); H01H 9/38 (2013.01); H01H 9/40 (2013.01); H01H 33/66 (2013.01); H01H 2009/0022 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A switch for an on-load tap-changer of a tap-changing transformer, the switch comprising:
a take-off contact;
a primary fixed contact;
at least one contact unit comprising a plurality of contacts comprising a moving contact, a first arcing contact and a second arcing contact, the plurality of contacts being configured to be pivoted about a pivot axis during a switchover process of the switch in such a way that the plurality of contacts can each assume a first position, in which the plurality of contacts respectively make contact with the take-off contact and the primary fixed contact, and a second position, in which the plurality of contacts respectively are separated from the take-off contact and the primary fixed contact, wherein the moving contact is positioned between the second arcing contact and the first arcing contact;
wherein the second arcing contact is configured to assume the first position before the first arcing contact when switching over from the second position to the first position and is configured to leave the first position after the first arcing contact when switching over from the first position to the second position,
wherein the moving contact, the second arcing contact, and the first arcing contact are biased towards the take-off contact or the primary fixed contact, and
wherein the second arcing contact is biased farther towards the take-off contact or the primary fixed contact than the first arcing contact.