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. 25, 2008
Filed:
Jun. 06, 2005
Joseph C. Zuercher, Brookfield, WI (US);
Birger Pahl, Milwaukee, WI (US);
Jerome K. Hastings, Sussex, WI (US);
Joseph C. Zuercher, Brookfield, WI (US);
Birger Pahl, Milwaukee, WI (US);
Jerome K. Hastings, Sussex, WI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
An arc fault detector analyzes patterns in a sequence of counts of interval to interval increases or decreases in integrated current for patterns characteristic of arc faults. In AC systems, the interval can be a full cycle or in an alternative embodiment, the changes in integrated current for positive and negative half cycles are separately determined and then interleaved before the change counts are calculated. The count sequence is reset when patterns characteristic of phenomena other than an arc fault are detected to avoid nuisance trips.