Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Reexamination Certificate
2007-09-21
2010-11-16
Natalini, Jeff (Department: 2831)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
C361S042000
Reexamination Certificate
active
07834637
ABSTRACT:
According to the features discussed herein, through a single generalized arc-fault detection algorithm, various types of series and/or parallel arc faults can be detected without any nuisance trip for either AC or DC Electric Power Systems. Running Discrete Fourier Series (RDFS) formulation for nuisance-free operation and cost-effective implementation is developed. Unlike other methods which require numerous source and load-side current and voltage measurements, only source side current is required. An arc detector may include a first detector to monitor variations of a magnitude of a fundamental component of a current, and a second detector to monitor an overload condition based in an i2t calculation. A method may include obtaining a first cycle of a fundamental component of a current, obtaining a second cycle of the fundamental component of the current, and comparing the first cycle of the fundamental component of the current and the second cycle of the fundamental component of the current to determine if a difference of the first cycle and the second cycle is greater than a threshold amount.
REFERENCES:
patent: 5047724 (1991-09-01), Boksiner et al.
patent: 5991327 (1999-11-01), Kojori
patent: 6242922 (2001-06-01), Daum et al.
patent: 6433978 (2002-08-01), Neiger et al.
patent: 6504692 (2003-01-01), Macbeth et al.
patent: 6625550 (2003-09-01), Scott et al.
patent: 7007179 (2006-02-01), Mares
patent: 7038897 (2006-05-01), Csanky
patent: 7177125 (2007-02-01), Lazarovich et al.
patent: 7190562 (2007-03-01), Pellon et al.
patent: 2006/0042846 (2006-03-01), Kojori et al.
patent: 2006/0087782 (2006-04-01), Michalko et al.
patent: 2006/0101296 (2006-05-01), Mares et al.
patent: 2006/0203401 (2006-09-01), Kojori et al.
patent: 2006/0215335 (2006-09-01), Deshpande
Kojori Hassan Ali
Ye Yang
Caglar Esq. Oral
Honeywell International , Inc.
Natalini Jeff
LandOfFree
Method and apparatus for generalized AC and DC arc fault... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for generalized AC and DC arc fault..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for generalized AC and DC arc fault... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4208892