The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 2020
Filed:
Dec. 29, 2017
Applicant:
Ppl Corporation, Allentown, PA (US);
Inventor:
Mychal Kistler, Allentown, PA (US);
Assignee:
PPL Corporation, Allentown, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B 21/18 (2006.01); H02H 1/00 (2006.01); H02H 7/28 (2006.01);
U.S. Cl.
CPC ...
G08B 21/185 (2013.01); H02H 1/0061 (2013.01); H02H 1/0092 (2013.01); H02H 7/28 (2013.01);
Abstract
A method of determining a fault and whether to activate an alarm includes detecting a first high impendence fault (HIF) at a first detection circuit having a first phase and triggering a variable pickup timer. The method further includes monitoring for a second HIF at a second detection circuit having a second phase for a period of time set by the variable pickup timer. The method further includes determining whether to trigger an alarm, wherein the alarm is triggered by the second HIF at the second detection circuit having the second phase being detected during the period of time and the alarm is otherwise not triggered.