公开(公告)号：US12206231B2

公开(公告)日：2025-01-21

申请号：US17706138

申请日：2022-03-28

Applicant: Chengli Li

Inventor： Chengli Li ,  Long Chen ,  Guolan Yue

IPC: H02H3/08 ,  G01R31/52 ,  H02H1/00 ,  H02H7/00

Abstract: A leakage current detection and interruption device includes a switch module for controlling electrical connection of 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 current thereon and to generate respective first and second leakage signals in response thereto; a signal processing module, coupled to the leakage current detection module to receive the first and/or second leakage signals and to generate a leakage fault signal in response thereto; and a trigger module, coupled to the switch module and the signal processing module, to receive the leakage fault signal and in response thereto, to drive the switch module to disconnect the electrical connection to the output end. The device can detect current leaks on the two power supply lines and is simple, low-cost and reliable.

公开(公告)号：US11223192B2

公开(公告)日：2022-01-11

申请号：US16746510

申请日：2020-01-17

Applicant: Chengli Li

Inventor： Chengli Li ,  Guolan Yue ,  Long Chen

IPC: H02H3/06 ,  H02H3/10 ,  H02H3/26

Abstract: A leakage current protection device with automatic reset after power outage includes a switch, a power supply module, a leakage current detection module, a self-testing module, a drive control module, and a first reset module. The drive control module drives the switch based on a leakage current signal from the leakage current detection module and/or a self-test fault signal from the self-testing module. The first reset module functions to automatically set the leakage current protection device in a connected state when power resumes after an outage. Another leakage current protection device with manual reset after power outage includes similar components above and also a second reset module, which functions to automatically set the leakage current protection device in a disconnected state when power resumes after an outage; the device can then be manually reset using a reset switch. These two devices can suit different needs of different electrical appliances.

公开(公告)号：US10069292B2

公开(公告)日：2018-09-04

申请号：US15080077

申请日：2016-03-24

Applicant: Chengli Li

Inventor： Chengli Li ,  Guolan Yue ,  Wei Zhang

IPC: H02H3/16 ,  H02H3/33 ,  H02H3/02

Abstract: A leakage current detection device connected between a power source and a load, which includes a self-testing or leakage current detection selection trigger unit, for selecting a leakage current detection mode or a self-testing mode; a self-testing unit, for periodically generating a simulated leakage current signal in the self-testing mode; and a leakage current detection unit, for detecting a leakage current signal in the leakage current detection mode and detecting the simulated leakage current signal in the self-testing mode. The selection trigger unit further causes the power source to be disconnected from the load when a leakage current signal is detected, and sends a self-testing result to the self-testing unit depending on whether the leakage current detection unit detects the simulated leakage current signal. The self-testing unit displays an indication of the self-testing result.

公开(公告)号：US09136082B2

公开(公告)日：2015-09-15

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，使得第一线圈和第二线圈都不导通， 从而使开关处于打开位置。