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:
May. 17, 2016
Filed:
Apr. 29, 2013
Applicant:
Abb Technology Ltd, Zürich, CH;
Inventors:
Niraj Suthar, Gujarat, IN;
Vishal H. Shah, Gujarat, IN;
Priyank Desai, Gujarat, IN;
Mohammed Y. Shafi, Rangareddy District, IN;
Assignee:
ABB TECHNOLOGY LTD, Zürich, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 3/00 (2006.01); H02H 3/16 (2006.01); H02H 1/04 (2006.01); H02H 1/06 (2006.01); H02H 3/10 (2006.01);
U.S. Cl.
CPC ...
H02H 3/16 (2013.01); H02H 1/043 (2013.01); H02H 3/165 (2013.01); H02H 1/063 (2013.01); H02H 3/105 (2013.01);
Abstract
A protection feature is disclosed for a self powered protection relay having, for example, sensitive earth fault protection. Protection can be achieved in tandem with optimal power on trip time and with integrated logic for inrush discrimination. The self supplied protection relay can include a current processing module to measure and evaluate line current to generate a trip signal, and to suppress inrush current to block earth fault detection during an inrush condition and thereby increase sensitivity of fault detection.