公开(公告)号：US11049677B2

公开(公告)日：2021-06-29

申请号：US16472718

申请日：2017-12-19

Applicant: KOREA ELECTRO TECHNOLOGY RESEARCH INSTITUTE ,  LSIS CO., LTD.

Inventor： Woo Young Lee ,  Hae Yong Park ,  Gyeong Ho Lee ,  Sang Hun Park ,  Chae Yoon Bae ,  Jung Wook Sim ,  Hyun Jae Jang

IPC: H01H33/00 ,  H01H33/59 ,  H01H33/666 ,  H02H3/087

Abstract: The DC interrupting device includes a main current conduction unit including a main interrupting switch, which is a mechanical switch, a reverse current power supply unit connected to an input terminal of the main current conduction unit and configured to generate a predetermined reverse current, and a reverse current conduction unit configured to supply the reverse current to an output terminal of the main current conduction unit. The reverse current power supply unit includes a first reverse current dedicated capacitor charged by a voltage applied to an input terminal of the main current conduction unit, a polarity reversing inductor configured to reverse a polarity of the first reverse current dedicated capacitor, and a reverse current power supply unit switch configured to perform circuit connection such that the polarity reversing inductor reverses the polarity of the first reverse current dedicated capacitor.

公开(公告)号：US09478383B2

公开(公告)日：2016-10-25

申请号：US14666021

申请日：2015-03-23

Applicant: LSIS CO., LTD.

Inventor： Gyeong Ho Lee ,  Jung Wook Sim ,  Hae Yong Park

IPC: H01H33/00 ,  H01H83/02 ,  H01H33/16 ,  H01H33/66 ,  H01H71/24

CPC classification number: H01H83/02 ,  H01H33/167 ,  H01H33/66 ,  H01H71/2409

Abstract: The fast switch includes: a housing; a vacuum interrupter installed in the housing, connected to a main circuit, and configured to open and close the main circuit; a contact spring coupled to a mover of the vacuum interrupter, and configured to provide a contact force; an insulating rod connected to the contact spring; a permanent magnet actuator connected to a lower end of the insulating rod, and configured to provide a switching driving force; a first capacitor configured to provide a discharge current to a coil of the permanent magnet actuator; a driving coil connected to a lower end of the permanent magnet actuator; and a second capacitor configured to provide a discharge current to the driving coil.

Abstract translation: 快速开关包括：一个外壳; 安装在壳体中的真空断路器，连接到主电路，并且被构造成打开和关闭主电路; 耦合到所述真空断续器的动子的接触弹簧，并且被配置为提供接触力; 连接到接触弹簧的绝缘杆; 连接到所述绝缘杆的下端的永久磁铁致动器，构造成提供切换驱动力; 第一电容器，被配置为向永磁体致动器的线圈提供放电电流; 连接到永磁体致动器的下端的驱动线圈; 以及构造成向驱动线圈提供放电电流的第二电容器。

公开(公告)号：US09599654B2

公开(公告)日：2017-03-21

申请号：US14793439

申请日：2015-07-07

Applicant: LSIS CO., LTD.

Inventor： Hae Yong Park ,  Jung Wook Sim ,  Gyeong Ho Lee

IPC: G01R31/02 ,  H02H3/10 ,  G01R19/165

CPC classification number: G01R31/027 ,  G01R19/165 ,  H02H3/105

Abstract: A fault current detection circuit comprises a primary current transformer that detects a current; a pair of secondary current transformers that convert a current detection signal into secondary conversion signals with a small current; a fault detection circuit section that determines whether or not a fault current occurs by comparing a current value according to a secondary conversion signal with a predetermined reference current value; a surge detection circuit section that determines whether or not a surge current occurs on the electric power circuit; and a trip determination unit that receives a fault detection signal and a surge detection signal, and generates a trip control signal when at least either one of the fault detection signal and the surge detection signal is received.

公开(公告)号：US09490628B2

公开(公告)日：2016-11-08

申请号：US14528949

申请日：2014-10-30

Applicant: LSIS CO., LTD.

Inventor： Jung Wook Sim ,  Gyeong Ho Lee ,  Hae Yong Park

IPC: H02H9/02 ,  H01H9/54 ,  H01H33/02 ,  H02H3/08 ,  H02H3/02

CPC classification number: H02H9/02 ,  H01H9/54 ,  H01H33/02 ,  H02H3/025 ,  H02H3/08 ,  H02H9/026

Abstract: A fault current limiter is provided. According to an embodiment of the present disclosure, the fault current limiter includes a switch whose contact point is opened when a fault current occurs; a current limiting element configured to limit the fault current when the fault current occurs; and a diode being serial-connected to the current limiting element, wherein a breakdown voltage of the diode is higher than a voltage drop by an impedance of the switch when a normal current flows.

Abstract translation: 提供故障电流限制器。 根据本公开的实施例，故障限流器包括开关，其在故障电流发生时接触点断开; 限流元件，用于限制故障电流发生时的故障电流; 以及串联连接到限流元件的二极管，其中当正常电流流动时，二极管的击穿电压高于开关阻抗的电压降。

公开(公告)号：US09093838B2

公开(公告)日：2015-07-28

申请号：US14051269

申请日：2013-10-10

Applicant: LSIS CO., LTD.

Inventor： Seung Hyun Bang ,  Hae Yong Park ,  Gyeong Ho Lee ,  Jung Wook Sim ,  Won Joon Choe ,  Min Jee Kim

IPC: G01R31/02 ,  H02H3/44 ,  H02H3/093 ,  H02H9/02

CPC classification number: H02H3/44 ,  H02H3/093 ,  H02H9/02

Abstract: The fault current detecting circuit includes: a current detection unit that outputs a current detection signal; a first comparing circuit unit that compares the current detection signal with a predetermined reference current value and outputs a first output signal; a differentiator that differentiates the current detection signal to output a change slope of the current detection signal; a second comparing circuit unit that compares the change slope with a predetermined reference change slope value and outputs a second output signal; a third comparing circuit unit that compares the current detection signal with a predetermined current detection limit reference value and output a third output signal; and a trip determining unit that outputs a trip control signal only when the first output signal and the second output signal are maintained to be received and the third output signal is not received.

Abstract translation: 故障电流检测电路包括：电流检测单元，其输出电流检测信号; 第一比较电路单元，将电流检测信号与规定的基准电流值进行比较，并输出第一输出信号; 微分器，其区分电流检测信号以输出电流检测信号的变化斜率; 第二比较电路单元，其将所述变化斜率与预定的基准变化斜率值进行比较，并输出第二输出信号; 第三比较电路单元，其将所述电流检测信号与预定电流检测限参考值进行比较，并输出第三输出信号; 以及跳闸确定单元，仅在第一输出信号和第二输出信号保持被接收并且没有接收到第三输出信号时输出跳闸控制信号。