US 12,237,665 B2
Leakage current detection and interruption device for power cord and related electrical connectors and electrical appliances
Chengli Li, Suzhou (CN); and Long Chen, Suzhou (CN)
Assigned to Chengli Li, Suzhou (CN)
Filed by Chengli Li, Suzhou (CN)
Filed on Feb. 23, 2023, as Appl. No. 18/173,655.
Application 18/173,655 is a continuation in part of application No. 17/682,598, filed on Feb. 28, 2022, granted, now 11,600,984.
Claims priority of application No. 202210166502.6 (CN), filed on Feb. 23, 2022; application No. 202220368421.X (CN), filed on Feb. 23, 2022; and application No. 202320263807.9 (CN), filed on Feb. 21, 2023.
Prior Publication US 2023/0268730 A1, Aug. 24, 2023
Int. Cl. H02H 3/32 (2006.01); G01R 31/52 (2020.01); H02H 1/00 (2006.01)
CPC H02H 3/32 (2013.01) [G01R 31/52 (2020.01); H02H 1/0007 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A leakage current detection and interruption device for a power cord, comprising:
a first power supply line and a second power supply line;
a switch module, configured to control an electrical connection of the first power supply line and second power supply line between an input end and an output end;
a leakage current detection module, including a first leakage current detection line and a second leakage current detection line, wherein the first leakage current detection line is configured to detect a first leakage current signal on the first power supply line and to generate a first self-test fault signal in response to the first leakage current detection line having an open circuit, and wherein the second leakage current detection line is configured to detect a second leakage current signal on the second power supply line and to generate a second self-test fault signal in response to the second leakage current detection line having an open circuit; and
a drive module, coupled to the switch module and the leakage current detection module, including:
at least one solenoid; and
a first semiconductor device and a second semiconductor device,
wherein the first semiconductor device is configured to, in response to the first leakage current signal and/or the first self-test fault signal, become conductive to form a first current path from the first power supply line to the second power supply line to supply current to the at least one solenoid, and wherein the at least one solenoid is configured to, in response to the current flowing through it, generate an electromagnetic force to drive the switch module to disconnect the electrical connection, and
wherein the second semiconductor device is configured to, in response to the second leakage current signal and/or the second self-test fault signal, become conductive to form a second current path from the second power supply line to the first power supply line to supply current to the at least one solenoid, and wherein the at least one solenoid is configured to, in response to the current flowing through it, generate an electromagnetic force to drive the switch module to disconnect the electrical connection.