Arc fault detector with immunity to tungsten bulb burnout and ci

Details Arc fault detector with immunity to tungsten bulb burnout and ci Arc fault detector with immunity to tungsten bulb burnout and ci

1997-09-29

1998-09-08

Gaffin, Jeffrey A.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 94, H02H 300

Patent

active

058053980

ABSTRACT:
A circuit breaker with an arc fault circuit provides immunity to false trips caused by tungsten bulb burnout and by a cold tungsten filament energized through a solid state dimmer. The detector circuit includes a pulse generator which generates pulses in response to the step increases in current occurring each time an arc is struck. A zener diode limits the amplitude of pulses generated by the pulse generator to a value which is below that of pulses generated by the tungsten lamp. When a time attenuated accumulation of these pulses reaches a predetermined value, the circuit breaker is tripped. By clipping the pulses with the zener diode, the few large pulses generated by tungsten bulb burnout or energization of a cold tungsten bulb by a solid state dimmer switch are insufficient to allow the time attenuated accumulation of pulses to reach the trip value.

REFERENCES:
patent: 3996499 (1976-12-01), Gary et al.
patent: 5224006 (1993-06-01), MacKenzie et al.
patent: 5307230 (1994-04-01), MacKenzie
patent: 5459630 (1995-10-01), MacKenzie et al.
patent: 5519561 (1996-05-01), Mrenna et al.
patent: 5691869 (1997-11-01), Engel et al.

Affiliated with

Also associated with

Rating

Arc fault detector with immunity to tungsten bulb burnout and ci does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Arc fault detector with immunity to tungsten bulb burnout and ci, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arc fault detector with immunity to tungsten bulb burnout and ci will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1288795