Testing dynamic characteristics of overcurrent relays

Author

Benmouyal, G. ; Zocholl, S.E.

Author_Institution

IREQ, Varennes, Que., Canada

fYear

1993

fDate

6/15/1905 12:00:00 AM

Firstpage

350

Lastpage

355

Abstract

Test methods for determining the dynamic characteristics of an overcurrent relay are discussed. By dynamics is meant the response of the relay to a current of varying magnitude. The test method, originated by IREQ, is used by Hydro Quebec to determine the ability of new relays to coordinate with the installed base of induction relays. Concurrent with this work, working group G7 of the Power System Relay Committee for the IEEE Power Engineering Society is completing a standard for inverse time-overcurrent characteristics which define equations for microprocessor relays based on the physics of induction relays. The authors discuss the correlation between the dynamic tests of induction relays and the proposed standard equations for reset and trip characteristics of microprocessor-based relays.

Keywords

overcurrent protection; relay protection; testing; dynamic characteristics; induction relays; inverse time-overcurrent characteristics; microprocessor relays; overcurrent relays; reset characteristics; test method; trip characteristics; Current measurement; Delay effects; Differential equations; Physics; Power system dynamics; Power system relaying; Relays; Springs; Testing; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

WESCANEX 93. 'Communications, Computers and Power in the Modern Environment.' Conference Proceedings., IEEE

Conference_Location

Saskatoon, Sask., Canada

Print_ISBN

0-7803-1319-4

Type

conf

DOI

10.1109/WESCAN.1993.270523

Filename

270523