公开(公告)号：US20230402833A1

公开(公告)日：2023-12-14

申请号：US17840233

申请日：2022-06-14

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN

IPC: H02H3/16 ,  G01R31/52

CPC classification number: H02H3/16 ,  G01R31/52

Abstract: A leakage current detection and interruption device for power cord includes a switch module, a leakage current detection module, an open circuit detection module, and a trigger module. The switch module controls the electrical connection between input and output ends of the power cord. The leakage current detection module has two leakage current detection lines to collect leakage current on the power supply lines of the power cord. The open circuit detection module is coupled to the leakage current detection module, and generates an open-circuit fault signal when an open circuit exists in at least one of the two leakage current detection lines. The trigger module is coupled to the switch module and the open circuit detection module, and receives a leakage fault signal and/or the open-circuit fault signal, and in response thereto, drives the switch module to disconnect the electrical connection between the input and output ends.

公开(公告)号：US20240272238A1

公开(公告)日：2024-08-15

申请号：US18349137

申请日：2023-07-08

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN

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

CPC classification number: G01R31/52 ,  G01R31/58 ,  H02H3/16

Abstract: A leakage current detection and interruption (LCDI) device includes a switch module for controlling an electrical connection between input and output ends of power supply lines; a leakage current detection module for generating a leakage fault signal when detecting a leakage current on the power supply lines; a drive module coupled to the leakage current detection module and the switch module, for controlling the switch module to disconnect or connect the electrical connection; a wireless communication module, coupled to the output end, for wirelessly communicating with a remote control device to allow the remote control device to perform at least one of: controlling the switch module to disconnect or connect the electrical connection, setting parameters of the LCDI device, and obtaining electrical information and/or fault information of the LCDI device. The wireless communication module may be further coupled to the drive module and/or the leakage current detection module.

公开(公告)号：US20230268729A1

公开(公告)日：2023-08-24

申请号：US18178409

申请日：2023-03-03

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN

IPC: H02H1/00 ,  H02H3/16 ,  H02H7/22 ,  H01H83/02

CPC classification number: H02H1/0038 ,  H02H3/16 ,  H02H7/228 ,  H01H83/02

Abstract: A power cord with leakage current detection and interruption (LCDI) function includes at least two power supply lines, at least two insulating layers respectively covering the at lease two power supply lines, at least two leakage current detection lines respectively disposed around the at least two insulating layers, including a first leakage current detection line and a second leakage current detection line, at least one connector line, electrically coupled to the first leakage current detection line and/or the second leakage current detection line, and at least one insulating structure, covering at least one of the at least two leakage current detection lines, to electrically insulate the first and second leakage current detection lines from each other.

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.

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：US20240421583A1

公开(公告)日：2024-12-19

申请号：US18350817

申请日：2023-07-12

Applicant: Chengli LI

Inventor： Chengli LI ,  Xiaoming ZHANG ,  Long CHEN

IPC: H02H3/04 ,  H02H1/00

Abstract: A leakage current protection device includes a shell and a core assembly disposed within the shell, the core assembly including a leakage current protection assembly coupled to power supply lines, the leakage current protection assembly including an execution unit and an operation unit configured to control the execution unit, the execution unit being operable to connect and disconnect an electrical connection between the input end and the output end of the power supply lines, and a auxiliary function assembly, coupled to the leakage current protection assembly, configured to perform at least one load-end function. By integrating the auxiliary function assembly into the leakage current protection device, the device can perform at least a part of the load-end function, such as power conversion function and/or electromagnetic compatibility filter function. The device is reliable and versatile, suitable for various electrical appliances. It also has a simple structure and wide applicability.

公开(公告)号：US20240272237A1

公开(公告)日：2024-08-15

申请号：US18169756

申请日：2023-02-15

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN

IPC: G01R31/52 ,  H02H3/08

CPC classification number: G01R31/52 ,  H02H3/08

Abstract: A leakage current detection and interruption (LCDI) device includes a switch module for controlling an electrical connection between input and output ends of power supply lines; a leakage current detection module for generating a leakage fault signal when detecting a leakage current on the power supply lines; a drive module coupled to the leakage current detection module and the switch module, for controlling the switch module to disconnect or connect the electrical connection; a wireless communication module, coupled to the drive module and/or the leakage current detection module, for wirelessly communicating with a remote control device to allow the remote control device to perform at least one of: controlling the switch module to disconnect or connect the electrical connection, setting parameters of the LCDI device, and obtaining electrical information and/or fault information of the LCDI device. The LCDI device enables remote control and monitor, and has a simple electrical structure.

公开(公告)号：US20210006060A1

公开(公告)日：2021-01-07

申请号：US17013610

申请日：2020-09-06

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN

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

Abstract: An intelligent leakage current detection and interruption device for a power cord, including a switch module for controlling electrical connection of two power lines between input and output ends; a leakage current detection module, including two leakage current detection lines and a signal feedback line, one end of the parallelly coupled two leakage current detection lines being coupled via the signal feedback line to a point between the two power lines, for respectively detecting a leakage current on the two power lines; a detection monitoring module, coupled to the leakage current detection module, for detecting open circuit conditions in the two leakage current detection lines; and a drive module, coupled to the switch module, the leakage current detection module and the detection monitoring module, for driving the switch module to disconnect power to the output end in response to any detected leakage current or open circuit condition.

公开(公告)号：US20250060422A1

公开(公告)日：2025-02-20

申请号：US18469407

申请日：2023-09-18

Applicant: Chengli LI

Inventor： Chengli LI ,  Long CHEN

IPC: G01R31/52 ,  G08B7/06 ,  G08B29/18 ,  H02H1/00 ,  H02H3/04

Abstract: A leakage current detection and interruption device includes a switch module; a leakage current detection module for detecting leakage current signal on current carrying lines and generating a leakage fault signal in response thereto; a drive module, coupled to the switch module and the leakage current detection module, for driving the switch module to disconnect electrical connection on the current carrying lines in response to the leakage fault signal; a self-test module, coupled to the leakage current detection module and the drive module, for periodically generating a simulated leakage current signal and detecting malfunction in the leakage current detection module and/or drive module, and generating a self-test fault signal in response thereto; and an alarm module, coupled to the self-test module, for generating an alarm signal in response to the leakage fault signal and/or self-test fault signal. The device can alert the user under tripped or malfunction conditions.

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.