Protective relay methods and apparatus

Details Protective relay methods and apparatus Protective relay methods and apparatus

1981-08-17

1983-08-30

Salce, Patrick R.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Transformer protection

361 78, 361 86, 361 87, H02H 7045

Patent

active

044020287

ABSTRACT:
Differential protective relay methods and apparatus which include a differential current function supervised by both a harmonic restraint function and a voltage change function. The voltage change function determines whether or not the differential current function requires harmonic restraint supervision, preempting such supervision when it is not required, to enable faster trip decisions to be made by the differential current function.

REFERENCES:
patent: 3337772 (1967-08-01), Andersson
patent: 3414772 (1968-12-01), Sonnemann
patent: 3654516 (1972-04-01), Traversi
patent: 4204237 (1980-05-01), Zocholl
"A three-phase differential relay for transformer protection" by Einvall et al., INSPEC IEEE Transactions on Power Apparatus and Systems; vol. PAS-94, No. 6, Nov./Dec. 1975.

Affiliated with

Also associated with

Rating

Protective relay methods and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Protective relay methods and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protective relay methods and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-908813