Overcurrent detector and circuit breaker

Details Overcurrent detector and circuit breaker Overcurrent detector and circuit breaker

1987-07-24

1989-04-04

Paschall, M. H.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 96, 361 87, H02H 308

Patent

active

048191248

ABSTRACT:
A solid state overcurrent detector is provided with a current sensor means (200) having an OR circuit (130) connected by its input terminals to output terminals of burden circuits (41,42,43). A phase selecting circuit (400) for selecting the largest phase is connected by its input terminals to the output terminals of the burden circuits. The output terminal of the phase selecting circuit (400) is connected through a signal converting circuit (90) and an A/D converter (100) to a microcomputer (110) having a first level-discrimination circuit (1001) and a first time-current operation circuit (1002) with inverse time-current characteristics for various time interruptions responding to an amount of overcurrent. The output terminals of the OR circuit (130) are connected through a second level-discrimination circuit (140) to a second time-current operation circuit (150) for instant interruption.

REFERENCES:
patent: 3846675 (1974-11-01), Shimp
patent: 4246623 (1981-01-01), Sun
patent: 4429340 (1984-01-01), Howell
patent: 4550360 (1985-10-01), Dougherty
patent: 4589052 (1986-05-01), Dougherty
patent: 4672501 (1987-06-01), Bilac et al.
patent: 4685024 (1987-08-01), Martellock et al.

Affiliated with

Also associated with

Rating

Overcurrent detector and circuit breaker does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Overcurrent detector and circuit breaker, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Overcurrent detector and circuit breaker will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-184401