Design of a static time-overcurrent relay as affected by its application

Conference · Thu Jan 01 04:00:00 EST 1976 · Proc. Am. Power Conf.; (United States)

OSTI ID:5413364

Manley, R C ^[1]; Powell, L J

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1. General Electric Co., Philadelphia

The design, operation, uses, and performance of the General Electric Type SFC static time overcurrent relay are reviewed. It is shown that the solid-state SFC overcurrent relay represents a significant advance in protective relaying and offers the relay engineer a new tool with which to overcome some of the application difficulties he has faced in the past with electromechanical relays. With the SFC relay, overcurrent protection can be accomplished with greater precision and with reduced backup clearing times. Because the SFC static overcurrent relay costs more than conventional electromechanical overcurrent relays, the benefits of the relay are subject to careful economic analysis. It is expected that electromechanical relays will continue to be satisfactory for the vast majority of applications, with the SFC static relay available as an alternative for use in situations where its greater cost can be justified in terms of meeting specific requirements.

• OSTI ID: 5413364
• Conference Information: Journal Name: Proc. Am. Power Conf.; (United States) Journal Volume: 38
• Country of Publication: United States
• Language: English

Related Subjects

200301* -- Power Transmission & Distribution-- AC Systems
EHV & UHV-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
AC SYSTEMS
COMPARATIVE EVALUATIONS
DESIGN
ELECTRICAL EQUIPMENT
EQUIPMENT
OVERCURRENT
PERFORMANCE
POWER SYSTEMS
POWER TRANSMISSION LINES
RELAYS
SAFETY
SURGES
USES