Static trip circuit breaker with automatic circuit trimming

Details Static trip circuit breaker with automatic circuit trimming Static trip circuit breaker with automatic circuit trimming

1986-04-10

1987-10-27

Scott, J. R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 73, 324424, H02H 305

Patent

active

047033894

ABSTRACT:
Electronic trip units employed within static trip circuit breakers are individually calibrated and automatically adjusted to ensure that the trip transfer characteristics are within specification requirements. A trimming network within the trip unit circuit contains a plurality of parallel resistors each separately connected within the circuit by means of a fusible link. Test input and output values are compared to idealized values that are binary-weighted within a look-up table in the test equipment computer. The percent correction required is determined and the appropriate links are interrupted to provide ideal trip response.

REFERENCES:
patent: 3317791 (1967-05-01), Price et al.
patent: 3440491 (1969-04-01), Tenenbaum et al.
patent: 3801872 (1974-04-01), Zocholl et al.
patent: 4007401 (1977-02-01), Kimmel et al.
patent: 4286303 (1981-09-01), Genheimer et al.
patent: 4368500 (1983-01-01), Conroy, Jr. et al.
patent: 4550360 (1985-10-01), Dougherty
patent: 4589052 (1986-05-01), Dougherty
John Dougherty, "Digital I.sup.2 T Pickup, Time Band and Timing Control Circuit For Static Trip Circuit Breakers", Ser. No. 631,708, filed Jul. 17, 1984.
Graham A. Scott et al., "Electronic Circuit Breaker Trip Function Adjusting Circuit", Ser. No. 760,224, filed Jul. 29, 1985.

Affiliated with

Also associated with

Rating

Static trip circuit breaker with automatic circuit trimming does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1063148