US 12,237,660 B2
Leakage current detection and interruption device, electrical connector and electrical appliance
Long Chen, Suzhou (CN); Chengli Li, Suzhou (CN); and Guolan Yue, Suzhou (CN)
Assigned to Chengli Li, Suzhou (CN)
Filed by Chengli Li, Suzhou (CN)
Filed on Sep. 22, 2022, as Appl. No. 17/934,552.
Claims priority of application No. 202211131788.0 (CN), filed on Sep. 16, 2022; and application No. 202222459017.6 (CN), filed on Sep. 16, 2022.
Prior Publication US 2024/0097426 A1, Mar. 21, 2024
Int. Cl. H02H 3/08 (2006.01); G01R 31/52 (2020.01); H01H 47/00 (2006.01); H01H 47/32 (2006.01); H01H 71/24 (2006.01); H02H 3/05 (2006.01); H02H 9/02 (2006.01); H01R 13/713 (2006.01)
CPC H02H 3/05 (2013.01) [G01R 31/52 (2020.01); H01H 47/002 (2013.01); H01H 47/32 (2013.01); H01H 71/24 (2013.01); H02H 3/08 (2013.01); H01R 13/713 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A leakage current detection and interruption device comprising:
power supply lines having an input end and an output end;
a switch module coupled to the power supply lines between the input end and the output end, configured to control an electrical connection between the input end and the output end;
a leakage current detection module, configured to detect a leakage current in the power supply lines and to generate a leakage fault signal in response thereto;
a leakage-responsive drive module, coupled to the leakage current detection module and the switch module, configured to drive the switch module to disconnect the electrical connection between the input and output ends in response to the leakage fault signal;
a fault-responsive drive module, configured to drive the switch module to disconnect the electrical connection between the input and output ends in response to a fault in the leakage-responsive drive module regardless of whether a leakage current is detected and regardless of whether a fault is present in the leakage current detection module; and
a self-test module, coupled to the leakage current detection module and the leakage-responsive drive 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.