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公开(公告)号：US20230128751A1
公开(公告)日：2023-04-27
申请号：US17911297
申请日：2021-03-03
Applicant: LS ELECTRIC CO., LTD.
Inventor： Kyu Ho LEE
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.
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公开(公告)号：US20250157759A1
公开(公告)日：2025-05-15
申请号：US18837282
申请日：2023-02-02
Applicant: LS ELECTRIC CO., LTD.
Inventor： Kyu Ho LEE
IPC: H01H33/08
Abstract: Disclosed is an air circuit breaker having an arc cover, capable of preventing a secondary accident caused by arc generation. The air circuit breaker, according to one aspect of the present disclosure, may comprise: an operation unit in which arc is generated by the operation of a movable contact with respect to a stationary contact; an extinguishing unit which is installed on the upper part of the operation unit and primarily extinguishes the arc; and an arc cover which is installed on the upper part of the extinguishing unit, has a chamber formed, enabling the retention of high-temperature gas which has passed through the extinguishing unit, and has at least one or more guide panels partitioning the inside of the chamber into a plurality of sections and having an opening on one side, thereby enabling the high-temperature gas to flow along a flow path guided by the guide panels and be discharged through an outlet in a first direction.
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公开(公告)号：US20240186082A1
公开(公告)日：2024-06-06
申请号：US18284773
申请日：2022-03-24
Applicant: LS ELECTRIC CO., LTD.
Inventor： Kyu Ho LEE , Yong Ik PARK
Abstract: An air circuit breaker is disclosed. An air circuit breaker according to one aspect of the present disclosure includes a cradle and a circuit breaker main body drawn-in and drawn-out to/from the cradle; and further includes: an interlock lever connected to an off button of the circuit breaker main body to move vertically; and a transfer device unit provided on the lower side of the cradle, wherein the transfer device unit can include a key interlock assembly, which is provided to be horizontally movable so that, in a state of having moved toward one side thereof, the movement of the interlock lever is restricted and, in a state of having moved toward the other side thereof, the movement of the interlock lever is permitted.
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公开(公告)号：US20240153728A1
公开(公告)日：2024-05-09
申请号：US18282042
申请日：2022-04-29
Applicant: LS ELECTRIC CO., LTD.
Inventor： Kyu Ho LEE , Il Hyun KIM
Abstract: Disclosed are an arc extinguishing unit, a circuit breaking unit, and an air circuit breaker including the same. The present disclosure provides an arc extinguishing unit, a circuit breaking unit, and an air circuit breaker, including: side plates spaced apart from each other and disposed to face each other; a plurality of grids disposed between the side plates, spaced apart from each other, and coupled to the side plates, respectively; and a grid cover located above the grid and covering the grid, wherein the grid includes a grid leg extending downward to surround from both sides a protruding contact disposed to extend upward from a movable contact; and a first protective part formed to surround at least a portion of the grid leg at a lower portion of the grid leg.
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