Differential protective relay apparatus

Details Differential protective relay apparatus Differential protective relay apparatus

1990-08-09

1992-03-10

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 65, 361 44, 361 45, H02H 308, H02H 352

Patent

active

050953990

ABSTRACT:
A differential protective relay apparatus is switched over between a current differential mode and a voltage differential mode automatically by both even-order harmonic components of an imput applied to a differential circuit and a voltage across an impedance of the differential circuit, thereby to cover extensive fault modes while retaining high minimum pickup sensitivity, furthermore, devised against excessive fault voltages in the voltage differential mode, and, consequently, advantageous in insulation withstand capability.

REFERENCES:
patent: 4513344 (1985-04-01), Usui
patent: 4991052 (1991-02-01), Terada

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2288780