公开(公告)号：US11309158B2

公开(公告)日：2022-04-19

申请号：US17060923

申请日：2020-10-01

Applicant: LS Electric Co., LTD.

Inventor： Kihwan Oh ,  Kyunghwan Oh ,  Younghwan Kim

IPC: H01H73/18 ,  H01H33/08 ,  H01H71/10 ,  H01H9/36

Abstract: The present disclosure relates to an arc extinguishing unit of a molded case circuit breaker with a barrier provided between a fixed contact and a movable contact when a circuit is cut off, including fixed contacts fixed to part of a base assembly case; movable contacts that come contact or are separated from the fixed contacts; and an arc extinguishing part that extinguishes an arc generated when the movable contacts are separated from the fixed contacts. The arc extinguishing part includes a pair of side plates; multiple grids installed at a fixed interval between the pair of side plates; and arc barriers each installed on a base assembly case in a slidable manner, and configured to be in an open state of being separated from the movable contacts when a normal current flows on the circuit or is cutoff, and to close when a fault current is cutoff.

公开(公告)号：US11443911B2

公开(公告)日：2022-09-13

申请号：US16772556

申请日：2018-11-22

Applicant: LS ELECTRIC CO., LTD.

Inventor： Kyunghwan Oh ,  Kihwan Oh

IPC: H01H73/18 ,  H01H73/06 ,  H01H73/04 ,  H01H9/36

Abstract: The present device was conceived in order to resolve the aforementioned problem, and the objective thereof is to provide an arc chamber of a circuit breaker that enhances assemblability and ensures the consistency of the product. An arc chamber of the circuit breaker according to one embodiment of the present device comprises: a plurality of grids arranged at predetermined intervals outside a motion locus of a movable contactor and having a body portion and a leg portion extending from one side of the body portion; and a fixing cap having a receiving portion that is inserted into the leg portion in a press-fitting manner, wherein the fixing cap has a coupling portion extending to a side of the body portion at one side thereof.

公开(公告)号：US12198883B2

公开(公告)日：2025-01-14

申请号：US17755951

申请日：2020-04-09

Applicant: LS ELECTRIC CO., LTD.

Inventor： Kyunghwan Oh ,  Kihwan Oh ,  Younghwan Kim ,  Jeongjae Lim ,  Yonghun Lee

IPC: H01H71/16 ,  H01H50/18

Abstract: A trip device is disclosed. The trip device according to an embodiment of the present disclosure comprises an adjustment crossbar. The adjustment crossbar is in contact with or is spaced apart from a shooter and can open or close a breaker having the trip device. The adjustment crossbar is formed by coupling a fixed crossbar and a movable crossbar. The movable crossbar is slidably coupled to the fixed crossbar. The shooter is in contact with the fixed crossbar. Therefore, regardless of the movement of the movable crossbar, the contact between the shooter and the fixed crossbar can be maintained.

公开(公告)号：US11233385B2

公开(公告)日：2022-01-25

申请号：US16966313

申请日：2018-11-21

Applicant: LS ELECTRIC CO., LTD.

Inventor： Seungjin Ham ,  Kihwan Oh ,  Jinyoung Park

IPC: H02H1/00 ,  H02H3/16 ,  H01H83/02 ,  H01H83/04 ,  H01H71/04 ,  H01H71/12

Abstract: The present disclosure relates to an earth leakage breaker and an arc detection apparatus attachable/detachable to/from the earth leakage breaker. An earth leakage breaker and an arc detection apparatus according to one embodiment of the present disclosure comprise: a body of the earth leakage breaker; and an arc detection module attachably/detachably coupled to the body of the earth leakage breaker so as to detect an arc current, wherein the arc detection module comprises: an arc detection unit connected to a first load side terminal of the body of the earth leakage breaker so as to detect an arc current flowing through a line; a control unit for determining an arc current on the basis of an arc detection signal delivered by the arc detection unit; and an output unit for outputting a signal or a current, according to a control signal of the control unit.