Protective relay interface

Details Protective relay interface Protective relay interface

1992-03-06

1994-07-12

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361 68, 361 38, H02H 300

Patent

active

053294149

ABSTRACT:
A protective relay communication interface includes a transformer having primary windings arranged as, at least two, sets of opposed windings. The interface is connected to a local relay sensing a current at that point on a power line to be protected. The interface is also connected to a communication link to a remote relay sensing the current at a remote position on the power line. It is by this communication link that signals representative of the sensed currents are transmitted from each relay to the other. A local signal from the local relay is passed through part of, but not all of, the primary windings inducing a corresponding signal in the secondary windings of the transformer which is transmitted to the remote relay via the communications link. A received remote signal from the remote relay is passed via at least two mutually opposed sets of the primary windings to the local relay. Because the windings are opposed, the fluxes produced cancel inducing no net current in the secondary windings of the transformer, hence preventing feedback.

REFERENCES:
patent: 4939617 (1990-07-01), Hoffman et al.
patent: 5150270 (1992-09-01), Ernst et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-401162