US 12,293,888 B2
Medium voltage switching apparatus
Emanuele Morelli, Azzano San Paolo (IT); Gianluca Cortinovis, Albino (IT); Giorgio Forlani, Romano di Lombardia (IT); Jacopo Bruni, Caselle Lurani (IT); Pierluigi Invernizzi, Corna Imagna (IT); and Dietmar Gentsch, Ratingen (DE)
Assigned to ABB Schweiz AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on Apr. 25, 2023, as Appl. No. 18/306,473.
Claims priority of application No. 22173028 (EP), filed on May 12, 2022.
Prior Publication US 2023/0368992 A1, Nov. 16, 2023
Int. Cl. H01H 33/662 (2006.01); H01H 33/28 (2006.01); H01H 33/66 (2006.01)
CPC H01H 33/662 (2013.01) [H01H 33/28 (2013.01); H01H 33/6606 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A switching apparatus for medium voltage electric systems, said switching apparatus comprising one or more electric poles, wherein, for each electric pole, said switching apparatus comprises:
a first pole terminal, a second pole terminal and a ground terminal, said first pole terminal electrically couplable with a first conductor of an electric line, said second pole terminal electrically couplable to a second conductor of said electric line, and said ground terminal electrically couplable to a grounding conductor;
a plurality of fixed contacts spaced apart one from another, said plurality of fixed contacts comprising a first fixed contact electrically connected to said first pole terminal, a second fixed contact electrically connected to said second pole terminal, a third fixed contact electrically connected to said ground terminal, and a fourth fixed contact;
a movable contact reversibly movable about a corresponding rotation axis according to opposite first and second rotation directions, so that said movable contact can be coupled to or uncoupled from said fixed contacts;
a vacuum interrupter comprising a fixed arc contact electrically connected to said first pole terminal, a movable arc contact electrically connected to said fourth fixed contact and reversibly movable along a corresponding translation axis between a coupled position with said fixed arc contact and an uncoupled position from said fixed arc contact, and a vacuum chamber, in which said fixed arc contact and said movable arc contact are enclosed and can be coupled or decoupled; and
a motion transmission mechanism operatively coupled to said movable arc contact, said motion transmission mechanism actuatable by said movable contact to cause a movement of said movable arc contact along said translation axis, when said movable contact moves about said rotation axis,
wherein said motion transmission mechanism comprises a first lever element pivoted on a fixed support at a first hinge point and a second lever element pivoted on a said movable arc contact at a second hinge point, said first and second lever elements pivoted one on another at a third hinge point.