US 11,658,475 B1
Leakage current detection and interruption device, electrical connector and electrical appliance
Chengli Li, Suzhou (CN); and Long Chen, Suzhou (CN)
Assigned to Chengli Li, Suzhou (CN)
Filed by Chengli Li, Suzhou (CN)
Filed on Dec. 21, 2021, as Appl. No. 17/558,357.
Claims priority of application No. 202111558732.9 (CN), filed on Dec. 20, 2021; and application No. 202123197790.1 (CN), filed on Dec. 20, 2021.
Int. Cl. H02H 3/16 (2006.01); H02H 1/00 (2006.01)
CPC H02H 3/16 (2013.01) [H02H 1/0007 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A leakage current detection and interruption device comprising:
a switch module, coupled between an input end and an output end of a plurality of power supply lines, 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 on the plurality of power supply lines, and to generate a leakage current fault signal in response to detecting a leakage current;
a trip drive module, configured to drive the switch module to electrically disconnect the output end from the input end in response to the leakage current fault signal, the trip drive module including:
a first coil, configured to generate an electromagnetic force to drive the switch module; and
a first semiconductor device, coupled in series with the first coil, configured to cause the first coil to generate the electromagnetic force in response to the leakage current fault signal;
a coil function detection module, configured to detect a first fault condition in the first coil, and to generate a coil fault signal in response to detecting the first fault condition in the first coil;
a self-test module, configured to detect a second fault condition in the leakage current detection module and/or the first semiconductor device, and to generate a self-test fault signal in response to detecting the second fault condition; and
a detection drive module, configured to drive the switch module to electrically disconnect the output end from the input end in response to the coil fault signal and/or the self-test fault signal.