US 12,272,507 B2
Air circuit breaker
Kyu Ho Lee, Anyang-si (KR)
Assigned to LS ELECTRIC CO., LTD., Anyang-si (KR)
Appl. No. 17/911,297
Filed by LS ELECTRIC CO., LTD., Anyang-si (KR)
PCT Filed Mar. 3, 2021, PCT No. PCT/KR2021/002587
§ 371(c)(1), (2) Date Sep. 13, 2022,
PCT Pub. No. WO2021/182788, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 10-2020-0031561 (KR), filed on Mar. 13, 2020.
Prior Publication US 2023/0128751 A1, Apr. 27, 2023
Int. Cl. H01H 33/18 (2006.01); H01H 31/02 (2006.01)
CPC H01H 33/182 (2013.01) [H01H 31/023 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An air circuit breaker comprising:
a cover that includes a space and has a width defined in one direction;
a fixed contact that is accommodated in the space of the cover;
a movable contact that is accommodated in the space of the cover, is positioned adjacent to the fixed contact, and is moved in a direction toward or in a direction away from the fixed contact;
a plurality of arc extinguishing units spaced apart in the one direction that are accommodated in the space of the cover and are positioned adjacent to the fixed contact to extinguish an arc extending from the fixed contact toward the movable contact; and
a cover magnet unit that is coupled to the cover and is positioned adjacent to the fixed contact along the one direction to form a magnetic field for applying an electromagnetic force to the arc,
wherein the cover includes:
a first cover that covers the fixed contact at a first side of the fixed contact opposite to the movable contact and includes a space therein to accommodate a portion of the arc extinguishing unit and the fixed contact; and
a second cover that is coupled to the first cover, is positioned on a second side of the fixed contact facing the movable contact, and includes a space therein to accommodate remaining portions of the arc extinguishing unit and the movable contact, and
wherein the cover magnet unit is coupled to a first one of the first cover and the second cover, and extends toward a second one of the first cover and the second cover.