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:
Feb. 19, 2019
Filed:
Apr. 19, 2016
Applicant:
Littelfuse, Inc., Chicago, IL (US);
Inventor:
James Riley, Everson, WA (US);
Assignee:
LITTELFUSE, INC., Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 11/00 (2006.01); G01R 31/02 (2006.01); G01R 31/327 (2006.01); H01H 47/00 (2006.01); H01H 47/22 (2006.01);
U.S. Cl.
CPC ...
G01R 31/3278 (2013.01); G01R 31/025 (2013.01); H01H 47/002 (2013.01); H01H 47/22 (2013.01); H02H 11/005 (2013.01);
Abstract
Provided herein are improved relay protection systems that can detect a short to ground condition on an output of a relay. A relay protection system can bias an output of the relay. The output of the relay can be monitored to determine if a bias level reduces below a predetermined threshold, indicating a short to ground condition. If a short to ground condition is detected, the relay protection system can prevent the relay from transitioning from an open position to a closed position. As a result, a power source can remain decoupled from a load, thereby preventing damage to the relay and the load.