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:
Mar. 01, 2011
Filed:
Aug. 01, 2008
Keith W. Kawate, Attleboro Falls, MA (US);
Lynwald Edmunds, South Easton, MA (US);
Roger D. Mayer, Rehoboth, MA (US);
Keith W. Kawate, Attleboro Falls, MA (US);
Lynwald Edmunds, South Easton, MA (US);
Roger D. Mayer, Rehoboth, MA (US);
Sensata Technologies Massachusetts, Inc., Attleboro, MA (US);
Abstract
An arc fault detection apparatus that provides for better discrimination of electrical arcing events from nuisance loads. The arc fault detection apparatus includes an arcing sense circuit having a comparator circuit with a variable threshold voltage that varies continuously with the line voltage. The arc fault detection apparatus has reduced susceptibility to nuisance tripping in the presence of sudden changes in the load current that occur outside of a specified time window centered on each zero crossing point of the line voltage.