G - Physics – 01 – R
Patent
G - Physics
01
R
G01R 31/02 (2006.01)
Patent
CA 2292349
The present invention is directed to an arc fault detector comprising a first sensor responsive to the rate of change of current with respect to time in a circuit being protected for generating a first signal, a second sensor responsive to the magnitude of current flowing in a circuit being protected for generating a second signal; and a detector connected to the first sensor and the second sensor and responsive to the sum of the first signal and the second signal for generating an arc fault signal whenever the sum exceeds a preselected value. The arc default detector of the present invention allows for a smaller and less expensive current transformer sensor without sacrificing the ability of the detector to respond to a broad range of arc fault currents. The default detector can be constructed to fit into a wiring sized device and may also serve as a ground fault detection circuit.
Macbeth Bruce F.
Packard Thomas N.
Kirby Eades Gale Baker
Pass & Seymour Inc.
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