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公开(公告)号：US20230154712A1
公开(公告)日：2023-05-18
申请号：US17916747
申请日：2021-03-29
Applicant: LS ELECTRIC CO., LTD.
Inventor： Young KIM , Min-Kyu SEO
CPC classification number: H01H71/04 , H01H71/522 , H01H2071/046
Abstract: The present disclosure relates to a power device monitoring system comprising: a cradle having a cradle terminal formed on the rear side thereof; a circuit breaker mechanically or electrically connected to or separated from the cradle terminal; at least one position detection means mounted inside the circuit breaker so as to detect the position of a circuit breaker body in real time; and a display unit for outputting the mobile characteristic of the circuit breaker body detected by the position detection means.
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公开(公告)号：US20230154707A1
公开(公告)日：2023-05-18
申请号：US17916696
申请日：2021-03-03
Applicant: LS ELECTRIC CO., LTD.
Inventor： Il Hyun KIM
IPC: H01H33/70
CPC classification number: H01H33/7069
Abstract: The present disclosure relates to an arc extinguishing assembly, including side members which are spaced apart by a certain distance and disposed to face each other; an exhaust which is installed at an upper part of the side member; a plurality of grids which are installed between the side members and having both ends fixed to each of the side members; and an arc guide whose one side is coupled to the side member and which is installed at a lower part of the plurality of grids, wherein the arc guide is made of a material having heat resistance, and a circuit breaker including the same.
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公开(公告)号：US20230121694A1
公开(公告)日：2023-04-20
申请号：US17793519
申请日：2020-12-24
Applicant: LS ELECTRIC CO., LTD.
Inventor： Kyeonghun JANG , Minseok KIM , Deokyong YUN
Abstract: The present disclosure relates to a frame of an electromagnetic contactor, and more specifically, to an electromagnetic contactor having excellent coupling force between an arc box and a frame. The electromagnetic contactor, comprises: a lower frame; an upper frame coupled to the upper portion of the lower frame; and an arc cover coupled to the upper portion of the upper frame, wherein a first coupling part, is protrudingly formed on one surface of the lower frame, a second coupling part, connected to the first coupling part is protrudingly formed on one surface of the upper frame, and a third coupling part, connected to the second coupling part is protrudingly formed on one surface of the arc cover, wherein the fastening member is fastened by connecting the first coupling part, the second coupling part and the third coupling part.
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公开(公告)号：US20230119322A1
公开(公告)日：2023-04-20
申请号：US17909639
申请日：2021-02-26
Applicant: LS ELECTRIC CO., LTD.
Inventor： Yong Ik PARK
IPC: H01H33/08
Abstract: The present disclosure relates to an arc extinguishing assembly which, when an arc is generated, has a structure that can push the generated arc in a direction farther away from a stationary contact point by forming a transient pressure difference between arc guides.
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公开(公告)号：US20230115892A1
公开(公告)日：2023-04-13
申请号：US17911319
申请日：2021-03-03
Applicant: LS ELECTRIC CO., LTD.
Inventor： Han Baek CHUNG
Abstract: Disclosed is an air circuit breaker. The air circuit breaker according to an embodiment of the present disclosure includes a CT magnet unit. The CT magnet unit is provided in the air circuit breaker to cover a movable contact point exposed to the outside. A CT magnet is provided inside a case that forms the outer shape of the CT magnet unit. The CT magnet independently forms a sub magnetic field or forms a main magnetic field together with an extinguishing magnet provided in an arc extinguishing unit. Due to the magnetic field formed by the CT magnet, an arc that is generated receives the application of an electromagnetic force directed toward the arc extinguishing unit. Accordingly, the generated arc can be quickly moved and extinguished.
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Patent Agency Ranking
公开(公告)号：US20230006436A1
公开(公告)日：2023-01-05
申请号：US17757268
申请日：2020-11-09
Applicant: LS ELECTRIC CO., LTD.
Inventor： Sangtack SHIN
Abstract: The present disclosure relates to a protective relay detecting disconnection in a circuit comprising a disconnection detection unit including a plurality of nodes connected to both ends of an output of a transformation unit, a reference voltage generation unit forming a reference voltage, and a plurality of resistors forming a voltage dividing resistor and connecting the plurality of nodes and the reference voltage generation unit; a sensing voltage generation unit applying a voltage for forming a predetermined voltage difference with respect to the reference voltage; and a disconnection determination unit connected to a first node, in which the magnitude of a voltage signal applied by the voltage dividing resistor varies depending on whether at least one of the transformation unit and the circuit connected to the transformation unit is disconnected, and detecting whether at least one of the transformation unit and the circuit connected to the transformation unit is disconnected.
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公开(公告)号：US20220385100A1
公开(公告)日：2022-12-01
申请号：US17755962
申请日：2020-03-18
Applicant: LS ELECTRIC CO., LTD.
Inventor： Yoonmin LEE
Abstract: The present disclosure comprises an alternating current-to-direct current converter for converting a commercial power current; a direct current-to-direct current converter for converting a battery current; a common output end at which the output end of the alternating current-to-direct current converter and the output end of the direct current-to-direct current converter are connected through a link capacitor having a preset bus voltage; a first circuit breaking part for opening or closing the current path between the common output end and a load; a second circuit breaking part for opening or closing the current path between the commercial power and the alternating current-to-direct current converter; a third circuit breaking part for opening or closing the current path between the battery and the direct current-to-direct current converter; and a control unit.
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公开(公告)号：US11515102B2
公开(公告)日：2022-11-29
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.
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公开(公告)号：US20220368115A1
公开(公告)日：2022-11-17
申请号：US17874829
申请日：2022-07-27
Applicant: LS ELECTRIC CO., LTD.
Inventor： Jongdoo KIM , Jihoon MA , Sangwon NAM , Jaekwon KOH
IPC: H02B1/56
Abstract: The present disclosure relates to an arc ventilation system of a distributing board, and more particularly, to an arc ventilation system of a distributing board to minimize an arc flowing forward to prevent damage. In the arc ventilation system of a distributing board in which a plurality of compartments are provided, a first compartment accommodating an electric power device which can be drawn in or out, among the plurality of compartments, comprises an arc blocking part blocking a space between the electric power device and the first compartment at an operation position of the electric power device.
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公开(公告)号：US11482997B2
公开(公告)日：2022-10-25
申请号：US17268307
申请日：2019-08-21
Inventor： Jungwook Sim , Suhyeong Jang , Sunghee Kang , Woonghyeob Song , Seungki Sul , Donghoon Park , Dongho Shin
IPC: H03K17/687 , H02H3/087
Abstract: The present disclosure relates to a bidirectional semiconductor circuit breaker including a primary circuit unit connected between a power supply and a load and in which a first semiconductor switch and a second semiconductor switch are arranged in series and a snubber circuit unit of which one end is connected to the front end of the first semiconductor switch and the other end is connected to the rear end of the second semiconductor switch, in parallel. The snubber circuit unit includes a first circuit line, a second circuit line, and a third circuit line of which one end and the other end are connected to the first circuit line and the second circuit line, respectively, and in which a first resistor and a second resistor are arranged in series, and provide a snubber circuit which is applicable to a bidirectional fault current and satisfies semiconductor protection and current restraining performance.
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