公开(公告)号：US12055601B2

公开(公告)日：2024-08-06

申请号：US17960283

申请日：2022-10-05

Applicant: Hong Kong Applied Science And Technology Research Institute Co., Ltd.

Inventor： Xin Li ,  Kwong Yin Tsang ,  Qingchun Li ,  Tin Ho Li

IPC: G01R31/52 ,  H02H3/08 ,  H02H3/44

CPC classification number: G01R31/52 ,  H02H3/08 ,  H02H3/44

Abstract: Described is a method of identifying a short-circuit (SC) like event in a circuit breaker (CB). The method comprises sampling an incoming current to the CB to determine a maximum value of a slope of a curve of the incoming current. The method includes sampling the incoming current again before a level of the incoming current reaches a predetermined, preset, selected, or calculated SC threshold value THSC for the CB. The method involves determining from the sampled incoming current that a value of the slope of the incoming current has changed from its maximum slope value to a lower slope value to thereby determine that the incoming current is indicative of a SC like event and does not comprise a real SC event.

公开(公告)号：US20240118350A1

公开(公告)日：2024-04-11

申请号：US17960283

申请日：2022-10-05

Applicant: Hong Kong Applied Science And Technology Research Institute Co., Ltd.

Inventor： Xin Li ,  Kwong Yin Tsang ,  Qingchun Li ,  Tin Ho Li

IPC: G01R31/52 ,  H02H3/08 ,  H02H3/44

CPC classification number: G01R31/52 ,  H02H3/08 ,  H02H3/44

Abstract: Described is a method of identifying a short-circuit (SC) like event in a circuit breaker (CB). The method comprises sampling an incoming current to the CB to determine a maximum value of a slope of a curve of the incoming current. The method includes sampling the incoming current again before a level of the incoming current reaches a predetermined, preset, selected, or calculated SC threshold value THSC for the CB. The method involves determining from the sampled incoming current that a value of the slope of the incoming current has changed from its maximum slope value to a lower slope value to thereby determine that the incoming current is indicative of a SC like event and does not comprise a real SC event.