US 12,451,302 B2
Three-phase arc quenching device with two pistons
James Mannekutla, Västerås (SE); Elisabeth Lindell, Västerås (SE); and Ola Jeppsson, Västerås (SE)
Assigned to ABB Schweiz AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on Dec. 13, 2022, as Appl. No. 18/065,047.
Claims priority of application No. 21215547 (EP), filed on Dec. 17, 2021.
Prior Publication US 2023/0197371 A1, Jun. 22, 2023
Int. Cl. H01H 9/26 (2006.01); H01H 9/34 (2006.01)
CPC H01H 9/346 (2013.01) [H01H 9/26 (2013.01); H01H 2009/267 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An arc quenching device for a three-phase electrical switchgear, the device comprising:
a first busbar, a second busbar and a third busbar, each of a respective phase of the three-phase switchgear;
a first piston and a second piston, each of an electrically conductive material; and
at least one pyrotechnical actuator arranged with the first and second pistons to axially move each of the first and second pistons when the at least one pyrotechnical actuator is fired;
wherein the first and second pistons are arranged in relation to the first, second. and third busbars such that axial movement brings the first piston into contact with both the first busbar and the second busbar, short-circuiting the first and second busbars via the first piston, and the second piston into contact with both the first busbar and the third busbar, short-circuiting the first and third busbars via the second piston.