Air circuit breaker
AssigneeLs Electric Co., Ltd.
InventorKyu Ho Lee
Life of this patent
Estimating the term…
Abstract
An air circuit breaker is disclosed. The air circuit breaker according to an embodiment of the present disclosure includes a cover magnet unit. The cover magnet unit is directly coupled to an upper cover which forms the outer appearance of the air circuit breaker. The cover magnet unit is positioned adjacent to a fixed contact and forms a magnetic field. Due to the formed magnetic field, an electromagnetic force in a direction toward an arc extinguishing unit is applied to a generated arc. Accordingly, the generated arc may be rapidly moved and extinguished. The cover magnet unit is inserted into a surface of the upper cover and is not exposed to the outside. Therefore, the generated arc is not in contact with the cover magnet unit. As a result, the cover magnet unit is not damaged by the generated arc.
Claims13
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.
An air circuit breaker comprising:
- a cover that includes a space therein;
- therein and has a width defined in a one direction;
- a fixed contact that is accommodated in the space of the cover;
- a movable contact that is rotatably accommodated in the space of the cover and is positioned on a rear side of the fixed contact to be in contact with or spaced apart from the fixed contact;
- a plurality of arc extinguishing units that are spaced apart in the one direction and accommodated in the space of the cover and are positioned above the fixed contact to extinguish an arc provided between the fixed contact and the movable contact;
- and
- a cover magnet unit that is coupled to the upper cover and is positioned on a first side or a second side of the fixed contact along the one direction to form a magnetic field for applying an electromagnetic force to the arc.
Dependencies are inferred from the claim text.