公开(公告)号：US20240044998A1

公开(公告)日：2024-02-08

申请号：US17819283

申请日：2022-08-11

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN ,  Shengyun NIE

IPC: G01R31/52 ,  H02H1/00 ,  H02H3/16

CPC classification number: G01R31/52 ,  H02H1/0007 ,  H02H3/16

Abstract: A leakage current detection and interruption (LCDI) device includes a switch module to control electrical connection of first and second power supply lines between input and output ends, a leakage current detection module including first and second leakage current detection lines respectively covering the first and second power supply lines to detect leakage currents thereon, a detection monitoring module coupled to the leakage current detection module and the first and second power supply lines to generate an open circuit detection signal in response to an open circuit condition in the first or second leakage current detection line, and a test module including a normally closed test switch coupled to the first or second leakage current detection line, wherein when the test switch is manually operated to open, the switch module disconnects the first and second power supply lines between the input and output ends.

公开(公告)号：US20210265832A1

公开(公告)日：2021-08-26

申请号：US17314976

申请日：2021-05-07

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN

IPC: H02H3/16 ,  H02H1/00 ,  G01R31/52 ,  G01R31/58

Abstract: An leakage current detection and protection device includes a leakage current detection module for detecting a leakage current on the power supply lines and generating a detection feedback signal in response thereto, a self-test module for testing whether the leakage current detection module is faulty, and a trip module for disconnecting the power supply lines in response to the self-test fault signal. The self-test module includes a simulated leakage current trigger circuit for generating a simulated leakage current trigger signal, a simulated leakage current generating circuit for generating a simulated leakage current signal in response to the simulated leakage current trigger signal, a trigger signal turn-off module for turning off the simulated leakage current trigger signal in response to the detection feedback signal, and a fault signal generating module for detecting a fault in the leakage current detection module and generating a self-test fault signal in response thereto.

公开(公告)号：US20210111554A1

公开(公告)日：2021-04-15

申请号：US16653457

申请日：2019-10-15

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN ,  Shengyun NIE

IPC: H02H7/20 ,  H01R13/713 ,  H02H1/00

Abstract: A leakage current detection and protection device, and power connector and electrical appliance employing the same. The device includes: a leakage current detection module which detects a leakage current on the power lines to generate a leakage fault signal; a self-test module which periodically generates a simulated leakage current and outputs a self-test fault signal when the leakage current detection module is faulty; a trip module, including a switch coupled between the input and output ends of the power lines, and a first trip coil which drives the switch; a drive module which drives the trip module to disconnect the electrical connection between the input and output ends in response to the leakage fault signal and/or the self-test fault signal; and a trip function detection module which generates a trip coil fault signal in response to detecting an open circuit in the first trip coil to disconnect the electrical connection.

公开(公告)号：US20200091707A1

公开(公告)日：2020-03-19

申请号：US16687129

申请日：2019-11-18

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN

IPC: H02H7/22 ,  H01R13/713 ,  H02H1/00 ,  H01R13/717

Abstract: A leakage current detection and interruption (LCDI) device for power cord, and power connector and appliance employing the same. The LCDI device includes a switch module coupled on the power supply lines to control electrical connection between input and output ends of the device; a leakage current detection module including a leakage current detection line, for detecting a leakage current on the power supply lines and outputting a leakage current fault signal accordingly; a drive module, for driving the switch module to disconnect the electrical connection in response to the leakage current fault signal and/or an open circuit fault signal, the open circuit fault signal representing an open circuit condition of the leakage current detection line; and a test module including a test switch, coupled to the leakage current detection module, where the leakage current detection module outputs the leakage current fault signal when the test switch is closed.

公开(公告)号：US20190115748A1

公开(公告)日：2019-04-18

申请号：US16212505

申请日：2018-12-06

Applicant: Chengli LI

Inventor： Chengli LI ,  Shengyun NIE

IPC: H02H7/22 ,  H02H1/00 ,  H01R13/713

Abstract: A power cord leakage current detection and protection device, including: a switch unit controlling an electrical connection between input and output ends of the device, a switch drive module, and a leakage current detection circuit which includes a leakage current detection line for detecting a leakage current on a power supply line. The switch drive module includes a semiconductor device assembly, and a solenoid assembly coupled between a power supply line and the semiconductor device assembly. The solenoid assembly includes multiple coils with their current paths coupled in parallel; the semiconductor device assembly includes multiple semiconductor devices with their current paths coupled in parallel. When at least one coil is not an open-circuit and at least one semiconductor device is not an open-circuit, the switch drive module controls the switch unit based on a leakage current signal detected by the leakage current detection circuit to disconnect the power supply.

公开(公告)号：US20190097412A1

公开(公告)日：2019-03-28

申请号：US15718661

申请日：2017-09-28

Applicant: Chengli LI

Inventor： Chengli LI ,  Shengyun NIE

IPC: H02H3/16 ,  H02H7/20 ,  G01R31/02

Abstract: A power cord leakage current detection and protection device, including a switch unit configured to control an electrical connection between an input end and an output end of the device; a leakage current protection unit, which includes a switch drive module and a leakage current detection module, the switch drive module configured to control the switch unit based on a leakage current signal detected by the leakage current detection module, wherein the leakage current detection module includes a leakage current detection line configured to detect whether a leakage current is present on a first power supply line and/or a second power supply line, and a signal feedback line configured to detect whether the leakage current detection line has an open circuit; and a test unit, including a test switch, coupled to the a leakage current protection unit, wherein when the test switch is closed, the switch drive module controls the switch unit based on a signal on the signal feedback line.

公开(公告)号：US20150349512A1

公开(公告)日：2015-12-03

申请号：US14462822

申请日：2014-08-19

Applicant: Chengli Li

Inventor： Chengli LI ,  Guolan YUE

IPC: H02H3/16 ,  H02H5/04

CPC classification number: H02H5/047 ,  G01R31/025 ,  H02H3/08 ,  H02H3/105 ,  H02H3/16 ,  H02H3/162 ,  H02H3/334 ,  H02H5/04

Abstract: A leakage current detection interrupter (LCDI) with self-testing function, which includes: a leakage current detection unit, including multiple current-carrying wires and at least one leakage current detection wire for detecting a leakage current of the current-carrying wires; a phase protection unit, coupled to at least one current-carrying wire on the input side of the multiple current-carrying wires, and coupled to at least one current-carrying wire on the output side of the multiple current-carrying wires via the leakage current detection unit, to form a current loop; wherein the phase protection unit can generate a control signal to disconnect the electrical coupling between the LCDI and the power source. By using a temperature controlled module, the leakage current detection unit and the phase protection unit, an LCDI with self-testing function is achieved. When there is a leakage current in the current-carrying wires, or the current-carrying wire is open, or the temperature of the electrical appliance exceeds a predefined range, or the leakage current detection wire is broken, the LCDI can disconnect its electrical coupling with the power source, ensuring the safety of the appliance and enhancing the quality of the electrical grid.

Abstract translation: 一种具有自检功能的漏电流检测中断器（LCDI），包括：漏电流检测单元，包括多个载流线和至少一个漏电流检测线，用于检测载流线的漏电流; 相位保护单元，耦合到所述多个载流线的输入侧上的至少一个载流导线，并且经由所述泄漏耦合到所述多个载流线的输出侧上的至少一个载流导线 电流检测单元，形成电流回路; 其中相位保护单元可以产生控制信号以断开LCDI和电源之间的电耦合。 通过使用温度控制模块，泄漏电流检测单元和相位保护单元，实现了具有自检功能的LCDI。 当载流导线中的漏电流或载流导线断开时，或者电气设备的温度超过预定范围时，或漏电流检测线断开时，LCDI可断开其电耦合 与电源，确保电器的安全，提高电网的质量。

公开(公告)号：US20150116872A1

公开(公告)日：2015-04-30

申请号：US14310223

申请日：2014-06-20

Applicant: Chengli LI

Inventor： Chengli LI ,  Xiaoming ZHANG

IPC: H02H1/00 ,  H02H3/16

CPC classification number: H02H1/0015 ,  H01R13/713 ,  H01R24/22 ,  H01R2103/00

Abstract: An arc fault circuit interrupter includes: an insulating casing, electrical input terminals and electrical output terminals, first and second electrical path connected between the electrical input terminals and electrical output terminals, and a movement mechanism. The movement mechanism includes: first and second moving contact arms, electrically coupled to the first and second electrical paths, respectively; a control circuit board; an arc detection mechanism, electrically coupled to the control circuit board, for detecting an arc signal and causing the control circuit board to generate a trip signal; a tripping mechanism, electrically coupled to the control circuit board, for receiving the trip signal to disconnect the electrical coupling between the first moving contact arm and the first electrical path and/or the electrical coupling between the second moving contact arm and the second electrical path. The device can immediately cut off the power when detecting an arc signal to prevent fire hazard.

Abstract translation: 电弧故障电路断流器包括：绝缘壳体，电输入端子和电输出端子，连接在电输入端子和电输出端子之间的第一和第二电路，以及移动机构。 移动机构包括：分别电耦合到第一和第二电路径的第一和第二移动接触臂; 控制电路板; 电弧检测机构，电耦合到控制电路板，用于检测电弧信号并使控制电路板产生跳闸信号; 电耦合到控制电路板的跳闸机构，用于接收跳闸信号以断开第一移动接触臂和第一电路之间的电耦合和/或第二移动接触臂与第二电路之间的电耦合 。 当检测到电弧信号时，设备可以立即切断电源，以防止火灾。

公开(公告)号：US20140340798A1

公开(公告)日：2014-11-20

申请号：US14019414

申请日：2013-09-05

Applicant: Chengli LI ,  Guolan YUE

Inventor： Chengli LI ,  Guolan YUE

IPC: H01H83/02

CPC classification number: H01H83/02 ,  H02H3/05 ,  H02H3/162 ,  H02H3/33

Abstract: A ground-fault circuit interrupter (GFCI) device, including a relay for control a switch to be in an open position or a closed position, the relay including a first coil and a second coil, wherein when both the first coil and the second coil are non-conductive, the switch is caused to be in the open position. The GFCI also includes a relay start circuit connected to the first coil for causing the first coil to be conductive or non-conductive, wherein when the first coil is conductive, the first coil causes the switch to be in the closed position, but after the first coil is conductive, the coil start circuit becomes non-conductive. The GFCI further includes a relay sustain circuit connected to the second coil for causing the second coil to be conductive or non-conductive. In addition, the GFCI includes a ground fault detect circuit for causing both the relay start circuit and the relay sustain circuit to become non-conductive when a fault signal is detected, causing both the first coil and the second coil to be non-conductive, thereby causing the switch to be in the open position.

Abstract translation: 一种接地故障电路断路器（GFCI）装置，包括用于控制开关处于打开位置或闭合位置的继电器，所述继电器包括第一线圈和第二线圈，其中当所述第一线圈和所述第二线圈 不导通，使开关处于打开位置。 GFCI还包括连接到第一线圈的继电器启动电路，用于使第一线圈导通或不导通，其中当第一线圈导通时，第一线圈使开关处于关闭位置，但是在 第一线圈是导通的，线圈起动电路变得不导通。 GFCI还包括连接到第二线圈的继电器维持电路，用于使第二线圈导通或不导电。 此外，GFCI包括接地故障检测电路，用于当检测到故障信号时使继电器启动电路和继电器维持电路都变为不导通，使第一线圈和第二线圈都不导通， 从而使开关处于打开位置。

公开(公告)号：US20250015545A1

公开(公告)日：2025-01-09

申请号：US18357862

申请日：2023-07-24

Applicant: Chengli LI

Inventor： Xiaoming ZHANG ,  Chengli LI ,  Minghu BAO

IPC: H01R13/713 ,  G01R31/52 ,  H01R13/66

Abstract: A power track system includes a leakage current protection assembly, a track board, and track sockets slidably disposed on the track board. The leakage current protection assembly includes an input end for coupling to a power source and an output end coupled to electrical conductors within the track board to provide electrical power to the track board. The track board is electrically coupled to the track sockets to provide power thereto. The track sockets have socket holes to receive an electrical plug of a load, and is slidable to different positions of the track board. The leakage current protection assembly functions to cut off electrical connection between the input and output ends when any one of the track board, track sockets and load has a leakage fault that exceeds a threshold value. The power track system can provide leakage current protection function while supplying power to the loads.