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:
Jun. 25, 2019
Filed:
Dec. 08, 2016
Applicant:
Schneider Electric Usa, Inc., Andover, MA (US);
Inventor:
Joseph R Beierschmitt, Marion, IA (US);
Assignee:
Schneider Electric USA, Inc., Andover, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 3/33 (2006.01); H02H 1/00 (2006.01);
U.S. Cl.
CPC ...
H02H 3/331 (2013.01); H02H 1/0015 (2013.01); H02H 3/334 (2013.01);
Abstract
A single current transformer arc fault/ground fault sensing circuit utilizes a sense coil and an injection coil from the line conductor placed concentrically and overlapping on a common core. The injection coil is operated by an in-line switch to allow current flow into the injection winding to influence the sense coil. With both the line and return conductors of a single phase circuit being surrounded by the transformer, opening the switch allows a ground fault sampling period, while closing the switch allows an arc fault sampling period.