Back to results
US 12,154,735 B2Granted
Arc extinguishing unit and air circuit breaker comprising same
AssigneeLs Electric Co., Ltd.
InventorIl Hyun Kim
Life of this patent
Estimating the term…
Abstract
An arc extinguishing unit and an air circuit breaker comprising same are disclosed. An arc extinguishing unit, according to an embodiment of the present disclosure, comprises an extinguishing magnet unit that forms a magnetic field inside the arc extinguishing unit. Accordingly, a generated arc receives an electromagnetic force in the direction facing the exterior of the air circuit breaker, and thus can be rapidly moved and extinguished. The extinguishing magnet unit is accommodated in a magnet case. The magnet case can seal the extinguishing magnet unit. Therefore, the extinguishing magnet unit is not damaged by the generated arc.
Claims24
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.
6 more elements
An air circuit breaker comprising:
- a fixed contact;
- a movable contact that moves in a first direction toward the fixed contact or a second direction away from the fixed contact;
- and
- an arc extinguishing unit that is positioned adjacent to the fixed contact and the movable contact to extinguish an arc generated by the fixed contact and the movable contact being spaced apart,
- wherein the arc extinguishing unit includes:
- a pair of support plates that are spaced apart from each other and is disposed to face each other;
- a grid that is positioned between the pair of support plates, and each end of the grid is respectively coupled to one support plate of the pair of support plates;
- a magnet case that is positioned between the pair of support plates on a first side of the grid, extending between the pair of support plates, and each end of the magnet case is respectively coupled to one support plate of the pair of support plates;
- and
- a plurality of extinguishing magnets that are accommodated in the magnet case and disposed to be spaced apart from each other,
- wherein the plurality of extinguishing magnets forms a magnetic field between the pair of support plates;
- wherein the magnet case includes a grid coupling part that is recessed in one side facing the grid and extends between the pair of support plates, and
- wherein a first end of the first side of the grid that faces the magnet case is inserted and coupled to the grid coupling part.
10 more elements
An air circuit breaker, comprising:
- a first support plate;
- a second support plate, spaced apart from and disposed to face the first support plate;
- a first grid that is positioned between and coupled to the first support plate and the second support plate;
- a second grid that is positioned between and coupled to the first support plate and the second support plate and disposed to be spaced apart from the first grid;
- a grid cover that is positioned on a first side of the first grid and the second grid to cover the first grid and the second grid;
- a magnet case that is positioned between the first support plate and the second support plate on a second side of the first grid and the second grid opposite to the first side, wherein the magnet case extends between the first support plate and the second support plate, wherein each end of the magnet case is coupled to a respective support plate of the first support plate and the second support plate and wherein each side of the magnet case is coupled to a respective grid of the first grid and the second grid on the second side of the first grid and the second grid;
- and
- an extinguishing magnet that is accommodated in the magnet case, wherein the extinguishing magnet forms a magnetic field between the first support plate and the second support plate.
5 more elements
Dependencies are inferred from the claim text.