Method and apparatus for supervising a digital protective relayi

Details Method and apparatus for supervising a digital protective relayi Method and apparatus for supervising a digital protective relayi

1979-04-13

1981-06-30

Atkinson, Charles E.

Boots, shoes, and leggings

364481, 324 51, 361 86, H02H 336

Patent

active

042766052

ABSTRACT:
In a method and apparatus for supervising a digital protective relaying system, a first type of electrical quantities in an electric power system, each having a certain magnitude, are detected, digitized and operated on in a data processing unit to check whether there is a fault in any of first input circuits adapted to receive the first type of electrical quantities. To check whether there is a fault in a second input circuit which normally receives a second type of detected electrical quantity having a substantially zero magnitude, one of the first type of electrical quantities is inputted into the second input circuit, and the data processing unit performs an operation on the output of the second input circuit and the outputs of the first input circuits except for that first input circuit corresponding to the one of the first type of electrical quantities which is inputted to the second input circuit.

REFERENCES:
patent: 3569785 (1971-03-01), Durbeck et al.
patent: 3758763 (1973-09-01), Nohara et al.
patent: 3885199 (1975-05-01), Nohara et al.
patent: 3931502 (1976-01-01), Kohlas
patent: 3972470 (1976-08-01), Takagi
patent: 3984737 (1976-10-01), Okamura et al.
patent: 4107778 (1978-08-01), Nii et al.
patent: 4148087 (1979-04-01), Phadke

Affiliated with

Also associated with

Rating

Method and apparatus for supervising a digital protective relayi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for supervising a digital protective relayi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for supervising a digital protective relayi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2434622