公开(公告)号：US20240426941A1

公开(公告)日：2024-12-26

申请号：US18450000

申请日：2023-08-15

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN ,  Guolan YUE

IPC: G01R31/52 ,  G08B21/18

Abstract: An electrical fault detection and interruption device includes a switch module coupled between input and output ends of current carrying lines, a GFCI (ground fault circuit interrupter) fault detection module for generating a ground fault signal when detecting a leakage current on the current carrying lines, an AFCI (arc fault circuit interrupter) fault detection module for generating an arc fault signal when detecting harmful arcs on the current carrying lines, a drive module for driving the switch module to disconnect the electrical connection between the input and output ends in response to the ground fault signal and/or arc fault signal, a fault signal transfer module for generate a simulated leakage current signal in response to the arc fault signal, and a monitoring module for generating a harmful arc signal to test whether the electrical fault detection and interruption device is functioning normally.

公开(公告)号：US20160169981A1

公开(公告)日：2016-06-16

申请号：US14614334

申请日：2015-02-04

Applicant: Chengli LI

Inventor： Chengli LI ,  Guolan YUE

IPC: G01R31/42 ,  H02H3/04 ,  G01R35/00

CPC classification number: G01R31/42 ,  G01R31/025 ,  G01R35/00 ,  H02H3/335

Abstract: A leakage current detection device coupled to AC power supply wires carrying an AC signal, which includes: a leakage current detection circuit including a leakage current detector, the leakage current detection circuit operating during first half-cycles among positive and negative half-cycles of the AC signal to detect a leakage current of the power supply wires and to disconnect the power supply wires from an output side when a leakage current exceeding a first threshold value is detected; and a self-detecting circuit coupled to the leakage current detection circuit, operating during second half-cycles among the positive and negative half-cycles of the AC signal to test whether the leakage current detection circuit is functioning normally.

Abstract translation: 一种泄漏电流检测装置，其耦合到承载AC信号的AC电源线，其包括：漏电流检测电路，包括泄漏电流检测器，所述漏电流检测电路在所述漏电流检测电路的正半周期和负半周期期间 AC信号，当检测到超过第一阈值的泄漏电流时，检测电源线的漏电流并断开电源线与输出侧的连接; 以及耦合到泄漏电流检测电路的自检测电路，在AC信号的正半周期和负半周期期间的第二半周期期间进行操作，以测试泄漏电流检测电路是否正常工作。

公开(公告)号：US20240410927A1

公开(公告)日：2024-12-12

申请号：US18348161

申请日：2023-07-06

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN ,  Guolan YUE

IPC: G01R31/08

Abstract: An arc fault detection circuit includes a signal collection circuit that collects a current signal on power supply lines and to output a first signal; a window gating circuit that generates a window gating signal corresponding to the first signal; and a signal processing circuit, coupled to the signal collection circuit and the window gating circuit, for generating an arc fault signal based on the window gating signal and the first signal. By using the window gating circuit, the arc fault detection circuit performs arc detection only during certain time intervals of the AC period where the harmful arcs will be present. This improves the accuracy of arc detection and reduces the probability of false tripping.

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：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：US20240426940A1

公开(公告)日：2024-12-26

申请号：US18447206

申请日：2023-08-09

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN ,  Guolan YUE

IPC: G01R31/52 ,  G01R31/327 ,  H02H1/00

Abstract: An electrical fault detection and interruption device includes a switch module coupled between input and output ends of current carrying lines, for controlling an electrical connection between the two ends; a signal collection module, for detecting a fault signal on the current carrying lines and converting it to an electrical signal; a signal processing module, for determining whether a fault is present on the current carrying lines based on the electrical signal, and generating an electrical fault signal accordingly; a drive module, for driving the switch module to disconnect the electrical connection between the input and output ends in response to receiving the electrical fault signal; and an alarm module, for generating an alarm signal in response to receive the electrical fault signal. Thus, even when the device malfunctions and loses its protection function, it can still generate an alarm signal to alert the user.

公开(公告)号：US20240097426A1

公开(公告)日：2024-03-21

申请号：US17934552

申请日：2022-09-22

Applicant: Chengli Li

Inventor： Long CHEN ,  Chengli LI ,  Guolan YUE

IPC: H02H3/05 ,  G01R31/52 ,  H01H47/00 ,  H01H47/32 ,  H01H71/24 ,  H02H3/08

CPC classification number: H02H3/05 ,  G01R31/52 ,  H01H47/002 ,  H01H47/32 ,  H01H71/24 ,  H02H3/08 ,  H01R13/713

Abstract: A leakage current detection and interruption device includes a switch module configured to control electrical connection between input and output ends of power supply lines; a leakage current detection module configured to generate a leakage fault signal in response to a leakage current in the power supply lines; a leakage-responsive drive module configured to drive the switch module to disconnect the electrical connection in response to the leakage fault signal; a fault-responsive drive module configured to drive the switch module to disconnect the electrical connection in response to a fault in the leakage-responsive drive module; and a self-test module configured to generate a self-test signal and to generate a self-test fault signal in response to a fault in the leakage current detection module and/or the leakage-responsive drive module. By providing the fault-responsive drive module, the device can automatically disconnect the electrical power when the leakage-responsive drive module has a fault.

公开(公告)号：US20230307901A1

公开(公告)日：2023-09-28

申请号：US17706138

申请日：2022-03-28

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN ,  Guolan YUE

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

CPC classification number: H02H3/08 ,  G01R31/52 ,  H02H1/0007 ,  H02H7/008

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：US20150155698A1

公开(公告)日：2015-06-04

申请号：US14306686

申请日：2014-06-17

Applicant: Chengli Li

Inventor： Chengli LI ,  Guolan YUE

IPC: H02H1/00

CPC classification number: H02H1/0015 ,  H02H3/044

Abstract: An arc fault detection circuit for an arc fault circuit interrupter (AFCI). The arc fault detection circuit includes an arc detecting circuit for detecting an arc fault in one or more power supply lines and outputting a detected signal, an arc filtering circuit electrically coupled to an output terminal of the arc detecting circuit for removing signal parts unrelated to the arc fault from the detected signal and outputting a filtered half-cycle signal, and an arc processing circuit electrically coupled to an output terminal of the arc filtering circuit for generating, based on the filtered half-cycle signal received, a processed half-cycle signal characterizing the arc fault. The arc fault detection circuit also includes simulated arc testing circuit that has a user-touchable test switch, and an arc oscillator to generate a simulated arc fault signal for testing the arc fault detection circuit or its respective components.

Abstract translation: 一种用于电弧故障断路器（AFCI）的电弧故障检测电路。 电弧故障检测电路包括用于检测一个或多个电源线中的电弧故障并输出检测信号的电弧检测电路，电耦合到电弧检测电路的输出端的电弧滤波电路，用于去除与 并且输出滤波的半周期信号，以及电弧处理电路，其电耦合到所述电弧滤波电路的输出端子，用于基于所接收的经滤波的半周期信号，生成经处理的半周期信号 表征电弧故障。 电弧故障检测电路还包括具有用户触摸测试开关的模拟电弧测试电路和产生用于测试电弧故障检测电路或其相应部件的模拟电弧故障信号的电弧振荡器。

公开(公告)号：US20210210946A1

公开(公告)日：2021-07-08

申请号：US16746510

申请日：2020-01-17

Applicant: Chengli LI

Inventor： Chengli LI ,  Guolan YUE ,  Long CHEN

IPC: H02H3/06

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.