US 12,354,772 B2
Circuit breaker for monitoring power line
Wenxing Tan, Foshan (CN); and Gordon Liu, Foshan (CN)
Assigned to FOSHAN LONGWAY ELECTRON CO., LTD., Foshan (CN)
Filed by FOSHAN LONGWAY ELECTRON CO., LTD., Foshan (CN)
Filed on Jul. 14, 2023, as Appl. No. 18/352,416.
Application 18/352,416 is a continuation of application No. PCT/CN2022/114118, filed on Aug. 23, 2022.
Claims priority of application No. 202210858830.2 (CN), filed on Jul. 21, 2022.
Prior Publication US 2024/0029920 A1, Jan. 25, 2024
Int. Cl. H01B 9/02 (2006.01); H01B 9/00 (2006.01); H01H 71/04 (2006.01); H01R 24/28 (2011.01)
CPC H01B 9/02 (2013.01) [H01B 9/006 (2013.01); H01H 71/04 (2013.01); H01R 24/28 (2013.01); H01H 2071/044 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A circuit breaker, comprising a housing, a plug pin, a power line, a rectifier circuit, an electromagnetic tripping and locking device, the electromagnetic tripping and locking device comprising an electromagnetic coil, a switch contact, a test circuit, and a first trigger driving circuit, the power line comprising a phase wire and an insulating protective layer of the phase wire, a neutral wire and an insulating protective layer of the neutral wire, and a braided shielding wire, and the first trigger driving circuit comprising a first silicon controlled rectifier, a first resistance, and a second resistance, wherein:
a power line monitoring circuit is provided, and the power line monitoring circuit comprises a third resistance, a fourth resistance, a leakage current detecting circuit and a state judging circuit;
the state judging circuit is provided with a first foot end, a second foot end, and a third foot end;
one end of the third resistance, a power supply end of the rectifier circuit, the first foot end of the state judging circuit and a positive end of the first silicon controlled rectifier are connected in parallel, and the other end of the third resistance, one end of the fourth resistance, the second foot end of the state judging circuit, and one end of the leakage current detecting circuit are connected in parallel to form a first node;
the other end of the fourth resistance, one end of the first resistance, the third foot end of the state judging circuit and the other end of the leakage current detecting circuit are connected in parallel to form a second node;
the other end of the first resistance, a control end of the first silicon controlled rectifier, and one end of the second resistance are connected in parallel; and
a negative end of the first silicon controlled rectifier, the other end of the second resistance, and a common end of the rectifier circuit are connected in parallel.