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. 01, 2012
Filed:
Dec. 29, 2008
Sriram Changali, Kerala, IN;
John Kenneth Hooker, Louisville, KY (US);
Konstantin V. Grigoryan, Louisville, KY (US);
Scott Jeffrey Hall, Louisville, KY (US);
Sriram Changali, Kerala, IN;
John Kenneth Hooker, Louisville, KY (US);
Konstantin V. Grigoryan, Louisville, KY (US);
Scott Jeffrey Hall, Louisville, KY (US);
General Electric Company, Schenectady, NY (US);
Abstract
An apparatus to perform parallel arc fault current interruption (AFCI) is provided. The apparatus includes a current sensing device disposed in the electrical circuit, a detection unit configured to receive an output signal produced by the current sensing device and to output a secondary signal based on the output signal, a microcontroller coupled to the detection unit, configured to receive and to decompose the secondary signal via discrete wavelet transforms to thereby obtain discrete wavelet coefficients, to compute a sum of the discrete wavelet coefficients, and to compare the sum of the discrete wavelet coefficients to a predetermined threshold, and to generate a trip signal when the sensed load current is above a predetermined threshold and the sum of the discrete wavelet coefficients cooperatively indicate that predetermined threshold conditions are satisfied.