Title :
Developments in solid-state under-frequency relays
Author :
Mathur, B.L. ; Mehrotra, V.K. ; Parthasarathy, K. ; Kothari, G.C.
Author_Institution :
Indian Institute of Science, Department of Electrical Engineering, Bangalore, India
fDate :
11/1/1975 12:00:00 AM
Abstract :
Simpler circuits for frequency-sensitive relays responding to change and rate of change of system frequency have been developed employing phase-locked loops. A new relay responding to time intergral of the fall in system frequency has also been developed and its performance has been compared with those responding to change and rate of change of system frequency. The relays have been tested and calibrated with the help of a specially designed calibration kit.
Keywords :
phase-locked loops; semiconductor relays; frequency; performance; phase locked loop; semiconductor relay; time integral;
Journal_Title :
Electrical Engineers, Proceedings of the Institution of
DOI :
10.1049/piee.1975.0317
