公开(公告)号：US20180166833A1

公开(公告)日：2018-06-14

申请号：US15808839

申请日：2017-11-09

Applicant: Chengli LI

Inventor： Shengyun NIE ,  Chengli LI

IPC: H01R13/66 ,  H02H1/00 ,  H02H3/16 ,  H01R13/631 ,  H01R13/506 ,  H01R13/58

CPC classification number: H01R13/6683 ,  H01H71/58 ,  H01H73/44 ,  H01H83/04 ,  H01H83/144 ,  H01R13/506 ,  H01R13/5816 ,  H01R13/631 ,  H01R13/7135 ,  H02H1/0007 ,  H02H3/16

Abstract: A leakage current protection plug includes a body formed by a top cover and a base, a moving assembly disposed in the body, and output wires. The moving assembly includes a control circuit board, and a detector assembly and a trip assembly disposed on the control circuit board, wherein power input insertion plates and power output moving contact arms are assembled with the moving assembly. Each output moving contact arm is formed integrally and fixed to the detector assembly, and the output ends of the output moving contact arms are directly connected to the output conductor wires. The device has a simple overall structure and can be reliably assembled. By using integrally formed output moving contact arms to directly couple the input and output, it improves the accuracy of the leakage current detection parameters, reduces internal transfers and solder points, and reduces the size and cost of the plug.

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：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：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.