Circuit interrupter including an electric arc monitoring circuit

Electricity: electrical systems and devices – Safety and protection of systems and devices – With tuned circuit

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Details

361110, 361 85, 324536, H02H 346

Patent

active

057061599

ABSTRACT:
A circuit interrupter including an improved arc detection system which trips the interrupter in response to currents having frequencies and/or characteristics associated with arcing within the associated alternating current electrical system. The arc monitoring circuit determines if the signal produced by a current transducer is the result of arcing. The arc detection system includes two swept filters and associated amplifiers which produce a signal which has an amplitude representative of the frequencies present in the alternating current of the electric system. The portion of the filtered signal which has amplitudes above a predetermined level is integrated to produce a trip signal for the circuit interrupter when the value of the integration exceeds a predetermined limit.

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