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:
Aug. 31, 2021
Filed:
Mar. 08, 2019
Applicant:
Littelfuse, Inc., Chicago, IL (US);
Inventors:
Kristophor Jensen, Chicago, IL (US);
Kip M. Larson, Rapid City, SD (US);
Cornelis Verhey, Chicago, IL (US);
Assignee:
Littelfuse, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 31/50 (2020.01); H02H 1/00 (2006.01); H02H 9/08 (2006.01);
U.S. Cl.
CPC ...
H02H 1/003 (2013.01); G01R 31/50 (2020.01); H02H 9/08 (2013.01);
Abstract
A neutral grounding resistor fault protection arrangement. The fault protection arrangement may include a neutral grounding resistor, the neutral grounding resistor comprising a ground end and a non-ground end; a sense circuit, coupled to the non-ground end of the neutral grounding resistor; and a neutral grounding monitor, coupled to the non-ground end of the neutral grounding resistor, the neutral grounding monitor comprising an injection signal generator, the injection signal generator arranged to generate a frequency of 240 Hz or greater.