公开(公告)号：US20210320481A1

公开(公告)日：2021-10-14

申请号：US17285025

申请日：2019-10-14

Applicant: LS ELECTRIC CO., LTD.

Inventor： Hyoungjin KIM ,  Wooseung LIM

IPC: H02B13/075 ,  H01H33/91

Abstract: The present disclosure relates to a high speed earthing switch of a gas insulated switchgear and, more specifically, to a high speed earthing switch of a gas insulated switchgear, which includes an air blower so as to secure an improved arc interruption performance. A high speed earthing switch of a gas insulated switchgear according to an embodiment of the present disclosure comprises: an outer case; a cylinder member installed inside the outer case and having a ventilation hole formed along the lower circumferential surface; and a piston member installed to be inserted into the cylinder member, and moving backward and forward by means of a force transferred from a driving unit so as to inject air inside the cylinder member to a contact part when the cylinder member is opened.

公开(公告)号：US20210090829A1

公开(公告)日：2021-03-25

申请号：US16954851

申请日：2018-11-12

Applicant: LS ELECTRIC CO., LTD.

Inventor： Sangchul LEE

IPC: H01H33/18 ,  H01H33/02

Abstract: A DC circuit breaker according to various embodiments may comprise: a first terminal unit connected to a power source; and a second terminal unit connected to the first terminal unit and connected to a load, wherein the first terminal unit includes at least a pair of first terminals connected to each other in parallel and connected to the power source, and the second terminal unit includes at least a pair of second terminals corresponding respectively to the first terminals and connected to each other in parallel so as to be connected to the load.

公开(公告)号：US20210067055A1

公开(公告)日：2021-03-04

申请号：US16960209

申请日：2019-01-11

Applicant: LS ELECTRIC CO., LTD.

Inventor： Kwang-Soo KOH

IPC: H02M7/53862 ,  H02J3/38 ,  H02M7/493 ,  H02J15/00 ,  H02J3/32

Abstract: The grid-connected inverter system according to one embodiment of the present invention may convert direct current supplied from a direct current source into alternating current, receive a control command from an upper level controller and a power electronics building block group comprising a plurality of power electronics building blocks for supplying the converted alternating current to a grid, determine the number of power electronics building blocks which will operate according to the control command, and transmit a control signal for operating the determined number of power electronics building blocks to corresponding power electronics building blocks.

公开(公告)号：US20210065972A1

公开(公告)日：2021-03-04

申请号：US16962437

申请日：2018-12-18

Applicant: LS ELECTRIC CO., LTD.

Inventor： Ji-Hoon MA

IPC: H01F38/30 ,  H01F27/02 ,  H02B13/035

Abstract: The present invention relates to a switchboard using a bushing type current transformer applied thereto. The switchboard using a bushing type current transformer applied thereto, according to an embodiment of the present invention, may comprise: a terminal bushing; a switchboard terminal coupled to the terminal bushing; a metering transformer bushing which is installed or released from the front part thereof through a breaker chamber, covers the switchboard terminal, and is inserted into the terminal bushing; and a metering transformer which is fastened to the metering transformer bushing and disposed on the outer circumference of the metering transformer bushing. The metering transformer includes at least one terminal that faces forward, and the metering transformer bushing may include an opening for exposing the at least one terminal to the front thereof.

公开(公告)号：US20250158381A1

公开(公告)日：2025-05-15

申请号：US18836091

申请日：2023-03-17

Applicant: LS ELECTRIC CO., LTD.

Inventor： Sungjin JANG

IPC: H02H1/00 ,  H04B3/58

Abstract: The present specification relates to a protection relay system in which a relay device transmits data to a repeater device, the repeater device transmits the data to a terminal device, and the repeater device repeats communication between the relay device and the terminal device.

公开(公告)号：US20250157760A1

公开(公告)日：2025-05-15

申请号：US18839278

申请日：2023-02-02

Applicant: LS ELECTRIC CO., LTD.

Inventor： Sang Wook CHA

IPC: H01H33/08 ,  H01H33/12

Abstract: The present disclosure discloses an arc chute in which firing from the outside can be blocked and a load break switch including the same, the arc chute including: an arc grid part; two side cover parts spaced apart from each other and overlapping in one direction, and respectively coupled to both sides of the arc grid part; and a top cover part that is disposed between the two side cover parts and coupled to each of the two side cover parts, and is formed in a plate shape extending across both ends of the two side cover parts.

公开(公告)号：US20250157757A1

公开(公告)日：2025-05-15

申请号：US18838688

申请日：2023-01-16

Applicant: LS ELECTRIC CO., LTD.

Inventor： Hakmin KIM

IPC: H01H31/08 ,  H01H9/24 ,  H01H31/06

Abstract: The present disclosure relates to a circuit breaker having an in-out interlock device and, more specifically, to a circuit breaker having an in-out interlock device, which allows a switch of the circuit breaker to be switched to an off-state during transportation of a circuit breaker body.

公开(公告)号：US20250140228A1

公开(公告)日：2025-05-01

申请号：US18834699

申请日：2023-01-20

Applicant: LS ELECTRIC CO., LTD.

Inventor： Seong Eon KIM

IPC: G10K11/172 ,  H01F27/33

Abstract: A vibration reduction unit and a transformer comprising same are disclosed. The vibration reduction unit according to one aspect of the present disclosure may comprise: a first frame forming one portion of the exterior thereof; a second frame which forms the other portion of the exterior thereof, and which is coupled to the first frame; a resonance space formed inside the second frame so as to reduce transmitted vibration or noise by means of resonance; and a pipe member penetratively coupled to the first frame such that the resonance space communicates with the outside.

公开(公告)号：US12283897B2

公开(公告)日：2025-04-22

申请号：US18020563

申请日：2021-12-07

Applicant: LS ELECTRIC CO., LTD.

Inventor： Chul Kyun Lee

IPC: H02M7/48 ,  H02M3/158 ,  H02M7/483 ,  H02M7/49

Abstract: The present disclosure relates to a modular multi-level converter, wherein a cluster comprises multiple sub-modules connected to each other in series and multiple individual reactors connected to the respective sub-modules in series, and the multiple individual reactors are disposed between the multiple sub-modules, respectively. Therefore, the converter of the present invention is advantageous in that the volume thereof can be further reduced compared with when a conventional large-capacity reactor is used.

公开(公告)号：US12272507B2

公开(公告)日：2025-04-08

申请号：US17911297

申请日：2021-03-03

Applicant: LS ELECTRIC CO., LTD.

Inventor： Kyu Ho Lee

IPC: H01H33/18 ,  H01H31/02

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.