公开(公告)号：US20220277912A1

公开(公告)日：2022-09-01

申请号：US17625998

申请日：2019-08-20

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jungwoo YOO

IPC: H01H33/18 ,  H01H33/53

Abstract: An arc path forming part and a direct-current relay are disclosed. An arc path forming part according to an embodiment of the present invention comprises: a magnet frame extending in the length direction; and a plurality of main magnet portions placed in the length direction. The respective opposing surfaces of the main magnet portions facing each another have the same polarity. Therefore, magnetic fields in the direction of pushing away from each other are generated in a space between the respective main magnet portions. Due to the magnetic fields, an electromagnetic force in the direction toward the outside of the arc path forming part is formed. Accordingly, the generated arc is moved in the direction of the electromagnetic force and can be stably extinguished. Therefore, various members positioned in the central part of the direct-current relay are prevented from damages caused by the arc.

公开(公告)号：US20220209765A1

公开(公告)日：2022-06-30

申请号：US17606945

申请日：2020-03-19

Applicant: LS ELECTRIC CO., LTD.

Inventor： Woonghyeob SONG ,  Jungwook SIM ,  Chaeyoon BAE

IPC: H03K17/081

Abstract: The present disclosure relates to a semiconductor circuit breaker and, more specifically, to a semiconductor circuit breaker in which a protection circuit is modularized and thus maintenance and repair can be easily done. A semiconductor circuit breaker according to an embodiment of the present disclosure comprises: a main circuit unit connected between a power source and a load and having a semiconductor switch; an outer box equipped with the main circuit unit and having a module accommodation unit outside thereof; and a protection module detachably accommodated in the module accommodation unit.

公开(公告)号：US20220208488A1

公开(公告)日：2022-06-30

申请号：US17601578

申请日：2020-03-11

Applicant: LS ELECTRIC CO., LTD.

Inventor： Il-Hyun KIM

IPC: H01H33/18 ,  H01H33/53

Abstract: An arc-extinguishing unit structure for a direct current air circuit breaker according to one embodiment of the present disclosure comprises: a plurality of grids; side plates coupled to both sides of the plurality of grids so that the plurality of the grids are mounted so as to be spaced apart from each other; an exhaust cover positioned above the side plates and the plurality of grids; an arc guide coupled to the side plates so as to be located under the plurality of grids; a magnet coupled to the arc guide, wherein the magnet is magnetized with different poles on the basis of the plurality of grids and the vertical orientation of the arc guide.

公开(公告)号：US20220206070A1

公开(公告)日：2022-06-30

申请号：US17601535

申请日：2020-03-13

Applicant: LS ELECTRIC CO., LTD.

Inventor： Hyun-Wook LEE ,  Ju-Hyun KIM

IPC: G01R31/327 ,  H01H33/664 ,  G01N21/55

Abstract: The present disclosure relates to a contact point monitoring device for a vacuum circuit breaker, and a correction method performed through same, wherein deviations due to temperature in a sensor for monitoring the amount of wear at a contact point may be compensated for. According to the present disclosure, the amount of wear at the contact point may be accurately detected by correcting a characteristic value of a photosensor according to operation temperature, by taking into consideration the temperature characteristics of the photosensor.

公开(公告)号：US20220200478A1

公开(公告)日：2022-06-23

申请号：US17602899

申请日：2020-03-17

Applicant: LS ELECTRIC CO., LTD.

Inventor： Hyun-Seok OH

IPC: H02M7/44 ,  H02J3/08 ,  H02P27/06

Abstract: The present disclosure relates to a high voltage inverter system and a method for synchronizing the size and a phase of a high voltage inverter using same, and particularly to a high voltage inverter system which synchronizes the size and a phase of power output from a high voltage inverter with commercial power during a static transfer, and a method for synchronizing the size and a phase of the high voltage inverter using same. The high voltage inverter system according to the present disclosure synchronizes the size and a phase of voltage output from the high voltage inverter with commercial power, and thus may minimize electric shock during a static transfer from high voltage inverter power to commercial power.

公开(公告)号：USD954658S1

公开(公告)日：2022-06-14

申请号：US29741739

申请日：2020-07-15

Applicant: LS ELECTRIC CO., LTD.

Designer： Minho Choi

公开(公告)号：US11310429B2

公开(公告)日：2022-04-19

申请号：US16857709

申请日：2020-04-24

Applicant: LS ELECTRIC CO., LTD.

Inventor： Seungpil Yang

IPC: H04N5/232 ,  H04N5/225

Abstract: The present disclosure relates to a thermal image monitoring apparatus and a distributing panel having the same. According to the present disclosure, a rotation-vibration reduction unit and a horizontal vibration reduction unit can prevent relative sliding between a base and a bracket and between the bracket and a thermal image camera, and also reduce vibration in a rotating direction or one direction by virtue of contact with each other.

公开(公告)号：US11307265B2

公开(公告)日：2022-04-19

申请号：US16975528

申请日：2018-11-21

Applicant: LS ELECTRIC CO., LTD.

Inventor： Jaeshik Yoon ,  Jaeyoung Yu ,  Hyunyoung Jung

IPC: G01R19/165 ,  G01R19/25 ,  H01H83/02 ,  G01R31/52

Abstract: The earth leakage circuit breaker of the present disclosure includes a leakage current detection unit outputting a leakage current detection signal; a conversion unit outputting the leakage current magnitude of a fundamental wave component, a ratio of a third harmonic component, and a ratio of a positive pole peak current value to a negative pole peak current value; and a control unit comparing the leakage current magnitude of a fundamental wave component, the ratio of a third harmonic component, and the ratio of a positive pole peak current value to a negative pole peak current value with predetermined reference values to determine whether a leakage current of the alternating current component is generated or a leakage current of the direct current component is generated and to thereby output a trip control signal when it is determined that the leakage current of the direct current or alternating current component is generated.

公开(公告)号：US20220102085A1

公开(公告)日：2022-03-31

申请号：US17423626

申请日：2019-08-30

Applicant: LS ELECTRIC CO., LTD.

Inventor： Young-Kook KIM

IPC: H01H9/02

Abstract: A safety shutter of the present disclosure comprises: a base unit; a shutter unit; and a cam unit. The base unit is coupled to a cradle of an air circuit breaker, and a terminal connected to a main circuit passes through the base unit. The shutter unit is coupled to the base unit so as to be spaced apart at a predetermined interval, and accommodates the terminal in the space between the shutter unit and the base unit. The cam unit extends from the base unit and penetrates the shutter unit. The shutter unit deactivates insulation by exposing the terminal in the direction of the air circuit breaker when the air circuit breaker is inserted in the direction of the base unit.

公开(公告)号：US11289892B2

公开(公告)日：2022-03-29

申请号：US16966302

申请日：2018-11-21

Applicant: LS ELECTRIC CO., LTD.

Inventor： Sungsik Ham

IPC: H02H3/28 ,  H02H3/36 ,  H02H7/26 ,  H02H3/04 ,  H02H1/00 ,  H02H3/05 ,  H04L45/18 ,  H04L45/48

Abstract: The present disclosure provides a protection assistance device of multiple circuit breakers in a low-voltage system, in which protection assistance in both directions from the upper side to the lower side or from the lower side to the upper side is possible, and the number of wires for protection assistance between multiple upper/lower circuit breakers can be minimized. The protection assistance device includes at least one upper low-voltage circuit breaker; at least one middle low-voltage circuit breaker; at least one lower low-voltage circuit breaker; and a communication line which makes a communication connection between the low-voltage circuit breakers, wherein the low-voltage circuit breakers comprise a control unit for, when a trip operation of automatically breaking a circuit is performed, transmitting a communication packet for reporting a trip operation state to at least one predetermined circuit breaker among the circuit breakers through the communication line.