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Arc fault detector and method

  • US 20040263183A1
  • Filed: 04/23/2004
  • Published: 12/30/2004
  • Est. Priority Date: 04/24/2003
  • Status: Active Grant
First Claim
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1. An arc fault detector for a circuit comprising:

  • a current shunt resistor coupled in series with said circuit; and

    an arc discriminator comprising an amplifier sensing a first voltage on a first side of said current shunt resistor, sensing a second voltage on a second side of said current shunt resistor, and producing a first signal proportional to a current flow through said current shunt resistor, said arc discriminator further comprising a change detector receiving said first signal as input and producing an arc fault detection signal as output when said change detector detects a change in said first signal indicative of a presence of an arc fault in said circuit.

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