US 12,154,735 B2
Arc extinguishing unit and air circuit breaker comprising same
Il Hyun Kim, Anyang-si (KR)
Assigned to LS ELECTRIC CO., LTD., Anyang-si (KR)
Appl. No. 17/911,311
Filed by LS ELECTRIC CO., LTD., Anyang-si (KR)
PCT Filed Mar. 3, 2021, PCT No. PCT/KR2021/002586
§ 371(c)(1), (2) Date Sep. 13, 2022,
PCT Pub. No. WO2021/182787, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 10-2020-0031560 (KR), filed on Mar. 13, 2020.
Prior Publication US 2023/0110171 A1, Apr. 13, 2023
Int. Cl. H01H 33/18 (2006.01); H01H 31/26 (2006.01)
CPC H01H 33/182 (2013.01) [H01H 31/26 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An arc extinguishing unit comprising:
a plurality of support plates that are spaced apart from each other and is disposed to face each other;
a grid that is positioned between the plurality of support plates and is coupled to the plurality of support plates;
a grid cover that is positioned on one a first side of the grid to cover the grid;
a magnet case that is positioned between the plurality of support plates at a second side of the grid opposite to the first side of the grid, extending in one direction between the plurality of support plates, and each end of the magnet case is coupled to a respective support plate of the plurality of support plates; and
an extinguishing magnet that is accommodated in the magnet case,
wherein the extinguishing magnet forms a magnetic field between the plurality of support plates, and
wherein the grid is one of a plurality of grids that are provided and spaced apart from each other and disposed side by side in the one direction,
wherein an end of any one or more of the plurality of grids on the second side of the plurality of grids is coupled to the magnet case.