Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Reexamination Certificate
2007-10-16
2007-10-16
Deb, Anjan (Department: 2858)
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
C361S042000, C700S293000
Reexamination Certificate
active
11427345
ABSTRACT:
A computerized electricity system for connecting loads to a power source, including: (a) an arc fault detecting sub-system having at least one module including: (i) a relay unit, electrically associated with a particular load, for connecting and disconnecting to a power source; (ii) a current source for measuring a current being delivered from the power source to the load, to produce a current measurement; (iii) an analog circuit for receiving the current measurement from the current sensor, and for producing an analog signal based on the current measurement, and a second signal for indicating a potential arc fault event, and (iv) a digital circuit for receiving the second signal from the analog circuit and producing data, and (b) a processing unit connected to each module, so as to receive data corresponding to the analog signal, and the data from the digital circuit, the processing unit for identifying the arc faults, and wherein the processing unit is configured to command the relay unit to disconnect the current in response to identifying the arc faults, and wherein the processing unit is configured to provide this command only if several pre-determined conditions are met, (I) after detection of the potential arc fault event, the current measurement remains substantially unchanged, and (II) after a detection of at least one addition potential arc fault event, the arc fault events are found to be acyclic.
REFERENCES:
patent: 6242922 (2001-06-01), Daum et al.
patent: 7110864 (2006-09-01), Restrepo et al.
patent: 2003/0030448 (2003-02-01), Sapir
patent: 2006/0215335 (2006-09-01), Deshpande et al.
Deb Anjan
Friedman Mark M.
Target Hi-Tech Electronics Ltd.
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