Title :
Considerations for using high-impedance or low-impedance relays for bus differential protection
Author :
Behrendt, Ken ; Costello, David ; Zocholl, Stanley E.
fDate :
March 29 2010-April 1 2010
Abstract :
Two drastically different types of differential relays, one with a single set of very high-impedance inputs and another with multiple sets of low-impedance inputs, are available for bus differential protection. Protection engineers often question which type to choose for their bus protection applications. This paper discusses for each type of relay the concepts used, the pros and cons, and the importance that current transformer selection plays in applications.
Keywords :
current transformers; power transformer protection; relay protection; bus differential protection; current transformer selection; high-impedance-low-impedance relays; Circuit faults; Current transformers; Fault currents; Fault detection; Laboratories; Monitoring; Power system protection; Power system relaying; Protective relaying; Relays;
Conference_Titel :
Protective Relay Engineers, 2010 63rd Annual Conference for
Conference_Location :
College Station, TX
Print_ISBN :
978-1-4244-6073-1
DOI :
10.1109/CPRE.2010.5469509
