Patent ID: 7319574

Claim:
An arc fault detection apparatus for an electrical conductor, said apparatus comprising: an electric circuit having an opening for admitting said electrical conductor therethrough, said electric circuit including at least one transducer adapted to output a first signal representative of current flowing in said electrical conductor and a second signal; an arc fault detection circuit cooperating with said electric circuit to output a third signal derived from said first signal, said third signal being representative of an arc fault of said electrical conductor; an annunciator cooperating with said arc fault detection circuit to annunciate said third signal; and a power supply cooperating with said electric circuit, said power supply being adapted to power at least one of said arc fault detection circuit and said annunciator from said second signal, wherein said annunciator is adapted to output an audio signal to annunciate said third signal, and wherein said annunciator is further adapted to modulate said audio signal to indicate amplitude of said arc fault of said electrical conductor or to indicate a count of at least one occurrence of said arc fault.