Arc extinguishing unit and air circuit breaker comprising same
AssigneeLs Electric Co., Ltd.
InventorSang Chul Lee
Life of this patent
Estimating the term…
Abstract
An arc extinguishing unit and an air circuit breaker comprising same are disclosed. The arc extinguishing unit according to an embodiment of the present disclosure comprises an arc extinguishing magnet located above a grid. The arc extinguishing magnet forms a magnetic field in the arc extinguishing part and in a fixed contact and a movable contact that are located adjacent to the arc extinguishing part. An arc generated as the fixed contact and the movable contact are separated from each other receives an electromagnetic force in the formed magnetic field. The electromagnetic force passes through the grid and is formed in a direction facing the exterior of the arc extinguishing part. Thus, the generated arc may be quickly extinguished and moved.
Claims14
An arc extinguishing unit comprising:
- a plurality of support plates that is disposed to face each other;
- a grid that is positioned between the support plates and is coupled to the plurality of support plates, respectively;
- a grid cover that is coupled to the grid and covers the grid;
- and
- an extinguishing magnet that is accommodated in an inside of the grid cover,
- wherein the extinguishing magnet forms a magnetic field in a direction from the grid cover toward the grid or a direction from the grid toward the grid cover, and
- wherein the grid cover includes:
- a cover body that includes an accommodating space therein;
- a blocking plate that is accommodated in the accommodating space of the cover body and on which the extinguishing magnet is seated;
- and
- wherein the extinguishing magnet is accommodated in the accommodating space of the cover body, and is seated on the blocking plate.
An air circuit breaker comprising:
- a fixed contact;
- a movable contact that moves in a direction toward the fixed contact or a 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 plurality of support plates that is spaced apart from each other and is disposed to face each other;
- a plurality of grids that is positioned between the plurality of support plates and is coupled to the plurality of support plates, respectively, and extends between one side facing the fixed contact and the movable contact and the other side opposite to the fixed contact and the movable contact;
- a cover body that is coupled to the plurality of support plates, respectively, and is positioned adjacent to the other sides of the plurality of grids to cover the other sides of the plurality of grids;
- an extinguishing magnet that is accommodated in an accommodating space provided inside the cover body to form a magnetic field in a direction from the cover body toward the plurality of grids or a direction from the plurality of grids toward the cover body;
- a blocking plate that is accommodated in the accommodating space of the cover body and on which the extinguishing magnet is seated;
- and
- a magnetic cover that is accommodated in the accommodating space of the cover body and is seated on the blocking plate, and surrounds the extinguishing magnet.
Dependencies are inferred from the claim text.