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.

公开(公告)号：US20220013318A1

公开(公告)日：2022-01-13

申请号：US17291724

申请日：2019-08-19

Applicant: LS ELECTRIC CO., LTD.

Inventor： Youngmo YANG ,  Sunggyu NAM

IPC: H01H83/02 ,  H02H3/02 ,  H02H3/33 ,  H02H3/16

Abstract: The present disclosure relates to an earth leakage circuit breaker and a method for controlling the same. The earth leakage breaker includes a zero-phase current detection unit for detecting a zero-phase current generated in a zero current transformer formed in three-phase electrical lines; a voltage detection unit for detecting a voltage from each of the two electrical lines; a trip unit for tripping contact points between the two electrical lines and a single-phase load when a trip signal is inputted; and a control unit which, when the zero-phase current is detected by the zero-phase current detection unit, detects an electrical line in which the voltage has dropped by a predetermined level or more, and generates and outputs the trip signal to the trip unit when the electrical line in which the voltage has dropped by a predetermined level or more exists.

公开(公告)号：US20220006668A1

公开(公告)日：2022-01-06

申请号：US17432792

申请日：2019-07-10

Applicant: LS ELECTRIC CO., LTD.

Inventor： Sung Sik HAM

IPC: H04L12/46 ,  H04L29/08 ,  H04L12/753 ,  H04L12/721

Abstract: The present disclosure relates to a system for managing a switchboard using a ring network, including a plurality of switchboards for forming at least one group, a switch for forming a ring network with the plurality of switchboards to receive operation information related to an operation of a device provided in each switchboard from at least one switchboard among the plurality of switchboards, and a monitoring server for receiving the operation information, and it can be applied to other exemplary embodiments.