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:
Oct. 28, 2008
Filed:
Mar. 16, 2006
Applicants:
William J. Fox, Raleigh, NC (US);
Michael Carter, Clayton, NC (US);
Inventors:
William J. Fox, Raleigh, NC (US);
Michael Carter, Clayton, NC (US);
Assignee:
ADC DLS Systems, Inc., Eden Prairie, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 31/08 (2006.01); H02H 3/00 (2006.01); H02H 3/20 (2006.01); H02H 9/04 (2006.01); G08B 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for reducing the occurrence of false ground fault detections in a central office terminal is provided. The method includes generating a no-fault signal when no ground current is detected, delaying generation of a fault signal when ground current is detected at least for the duration of an expected pulse in AC induced signal, and when the ground current persists for a sufficient period, generating a signal indicating a fault condition.