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公开(公告)号：US20240077415A1
公开(公告)日：2024-03-07
申请号：US18272421
申请日：2021-12-22
Applicant: LS ELECTRIC CO., LTD.
Inventor： Jae-Hun YOON
CPC classification number: G01N21/33 , G01N21/41 , G01N2021/1742
Abstract: A transformer lifetime evaluation apparatus comprises a first storage part for storing insulation oil used for insulation of a transformer; a second storage part provided to be separated from the first storage part and storing insulation oil which is not used for the insulation of the transformer; a light-emitting unit for emitting light of a specified wavelength; a light-receiving unit for receiving light emitted from the light-emitting unit; a first optical cable connecting the light-emitting unit and the light-receiving unit, providing a moving path of light emitted from the light-emitting unit and received in the light-receiving unit; a second optical cable connecting the light-emitting unit and the light-receiving unit, providing a moving path of light emitted from the light-emitting unit and received in the light-receiving unit; and a calculation part connected to the light-receiving unit and receiving information about an optical property of methanol from the light-receiving unit.
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公开(公告)号：US11892495B2
公开(公告)日：2024-02-06
申请号：US17756611
申请日：2020-04-02
Applicant: LS ELECTRIC CO., LTD. , CHUNGBUK NATIONAL UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION , DONGWOO ELECTRIC CORP.
Inventor： Suhyeong Jang , Jongphil Hong , Pyungjung Kim
CPC classification number: G01R31/1245 , G01R31/14
Abstract: Insulation monitoring may be provided by a signal generation unit for applying a pulse signal to an electric line; a signal measurement unit for measuring the voltage of an applied pulse signal from the ground, when the pulse signal is applied to the ground through insulation resistance; an average voltage calculation unit for calculating the average voltage of the voltages measured during a period depending on sampling intervals; and a control unit for calculating the sampling intervals on the basis of an initial sampling interval and a preset time multiple, calculating the average voltage during the sampling period according to the calculated sampling intervals, and, according to whether the difference between calculated first and second average voltages measured before the first average voltage is within a first error range, detecting the first average voltage as a normal voltage, or calculating the sampling intervals by applying different time multiples thereto.
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公开(公告)号：US11887799B2
公开(公告)日：2024-01-30
申请号：US17600859
申请日：2020-03-11
Applicant: LS ELECTRIC CO., LTD.
Inventor： Sang-Chul Lee , Kyu-Ho Lee , Seung-Pil Yang
CPC classification number: H01H73/18 , H01H9/342 , H01H2213/004
Abstract: An arc extinction apparatus according to an embodiment of the present disclosure comprises a chamber unit, a division unit, a filter unit, and a cover unit. A discharge port is formed in the chamber unit such that a fluid in the chamber unit is discharged to the outside. An insertion groove is provided on inner faces of the chamber unit that face each other. The division unit is coupled to the inside of the chamber unit. In addition, the division unit divides a path of the fluid discharged through the discharge port into multiple paths. The filter unit is disposed in the discharge port and filters out at least one predetermined material from the fluid passing through the discharge port. The cover unit comprises a plurality of exhaust pipes and is coupled to the discharge port from the outside of the filter unit.
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公开(公告)号：US20240013995A1
公开(公告)日：2024-01-11
申请号：US18035698
申请日：2021-11-01
Applicant: LS ELECTRIC CO., LTD.
Inventor： Byeongsun SIM
Abstract: A latch assembly and a magnetic contactor including same are disclosed. A latch assembly according to one embodiment of the present disclosure comprises: a frame; a movable core and a latch unit, which are rotatably coupled to the frame. The movable core is rotatably coupled to a trip coil unit by means of a coupling member. An insertion hole for rotatably supporting the latch unit is formed on the frame. The movable core rotates along the coupling member. In addition, the latch unit is guided and rotated along the insertion hole. Therefore, the operational reliability and endurance limit of the latch assembly can be enhanced.
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公开(公告)号：US20240013986A1
公开(公告)日：2024-01-11
申请号：US18037917
申请日：2021-10-26
Applicant: LS ELECTRIC CO., LTD.
Inventor： Hongik YANG
Abstract: Disclosed are a motor assembly and a circuit breaker comprising same. According to an embodiment of the present invention, the motor assembly includes a cover member and a bush member formed of an insulating material. The bush member and the cover member physically and electrically space apart a motor and a gear member from each other. Here, the gear member is formed of a steel material and therefore maintains durability. Accordingly, the motor assembly can have improved insulation performance while maintaining operation reliability and rigidity.
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Patent Agency Ranking
公开(公告)号：US20230411097A1
公开(公告)日：2023-12-21
申请号：US18035467
申请日：2021-11-02
Applicant: LS ELECTRIC CO., LTD.
Inventor： Jung Woo YOO
CPC classification number: H01H50/546 , H01H50/36 , H01H47/32
Abstract: Disclosed are a movable contact part and a direct current relay comprising same. The movable contact part, according to one embodiment of the present disclosure, comprises a lower yoke. The lower yoke forms a magnetic force for canceling an electromagnetic repulsive force generated between a movable contact and a fixed contact. The lower yoke comprises: a support part for supporting the movable contact; and a wing part connected to the support part. The wing part is formed so as to be thinner than the support part. According to one embodiment, the wing part is formed so as to be shorter than the support part. Thus, the total weight of the lower yoke is decreased, while the area of the lower yoke is increased, and the thickness and length of the support part may be maintained. Consequently, the lower yoke magnetic strength, operational reliability, and vibration or impact resistance may be improved.
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公开(公告)号：US11830694B2
公开(公告)日：2023-11-28
申请号：US17269476
申请日：2019-08-06
Applicant: LS ELECTRIC CO., LTD.
Inventor： Jungwoo Yoo
Abstract: The present disclosure relates to a direct current relay and, more particularly, to a direct current relay including a mover assembly having improved support force with respect to a movable contactor. The direct current relay according to an embodiment of the present disclosure comprises a pair of fixed contactors and a movable contactor which is moved up and down by an actuator to come into contact with or be separated from the pair of fixed contactors, comprises a mover support disposed below the movable contactor and connected to the actuator by a shaft; a mover holder disposed above the movable contactor and fixed to the mover support; a contact pressure spring disposed between the movable contactor and the mover support to provide a contact pressure to the movable contactor; and a supporting pin installed to extend through the movable contactor and the mover holder.
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公开(公告)号：US20230354531A1
公开(公告)日：2023-11-02
申请号：US17799516
申请日：2021-01-12
Applicant: LS ELECTRIC CO., LTD.
Inventor： Su Hyeong LEE , Soo Yong HWANG
CPC classification number: H05K5/0052 , H05K5/0018 , H05K1/0274 , H05K2201/10106 , H05K2201/10121
Abstract: An electronic control device according to an embodiment of the present disclosure comprises a lower cover including a side wall with a first coupling portion and a second coupling portion; a circuit board arranged inside the side wall of the lower cover and having on the upper surface thereof a button; a middle cover provided with a third coupling portion coupled to the first coupling portion and a first button hole, and coupled to the lower cover by coupling of the third coupling portion to the first coupling portion; a button cover arranged on the upper surface of the middle cover, covering the first button hole, and having a protrusion portion; and an upper cover including a side wall provided with a fourth coupling portion coupled to the second coupling portion, the upper cover provided with a second button hole, and covering the button cover and the middle cover.
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公开(公告)号：US11804348B2
公开(公告)日：2023-10-31
申请号：US17638706
申请日：2020-04-07
Applicant: LS ELECTRIC CO., LTD.
Inventor： Jinhee Park , Jungwoo Yoo
Abstract: Disclosed are an arc path formation unit and a direct current relay including same. An arc path formation unit according to an embodiment of the present disclosure comprises a plurality of magnet parts. The magnet parts, positioned adjacent to respective stationary contacts, are configured such that surfaces facing each other have different polarities. Also, some of the plurality of magnet parts are disposed at an incline relative to other magnet parts. Thus, magnetic field is formed by the plurality of magnet parts to obliquely pass by each of the stationary contacts. The electromagnetic force generated by the magnetic field is imparted in a direction away from the central region of a direct current relay. Accordingly, the generated arc moves in a direction away from the central region of the direct current relay, and thus damage to the direct current relay can be prevented.
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公开(公告)号：US11799317B2
公开(公告)日：2023-10-24
申请号：US17275936
申请日：2019-09-03
Applicant: LS ELECTRIC CO., LTD.
Inventor： Dohyun Kim , Dongjin Yun , Minjun Park
CPC classification number: H02J9/061 , H02J1/102 , H02J3/0073 , H02J9/068 , H02J13/0004 , H02M1/0032
Abstract: The present specification relates to a power supply system which enables uninterruptible power supply, wherein a circuit breaker is provided to switch on/off each of electric circuits via which a plurality of power supply devices are connected, and thus the UPS function can be performed among the plurality of power supply devices by opening or closing the circuit breaker according to various situations occurring in the system to control power reception and supply.
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