IEEE standard inverse-time characteristic equations for overcurrent relays
By: sponsor, Power System Relaying Committee of the IEEE Power Engineering Society.
Contributors: IEEE Power Engineering Society. Power Systems Relaying Committee.; Institute of Electrical and Electronics Engineers.; IEEE Standards Board.
Series: IEEE Std -- C37.112-1996.; IEEE std -- C37.112-1996.
Publisher: Institute of Electrical and Electronics Engineers
Published: 1997
Place of publication: New York, N.Y., USA
Language: eng
Number of pages: 14
Subjects: Electric relays -- Standards
Other titles: Standard inverse-time characteristic equations for overcurrent relays.
Description: The inverse-time characteristics of overcurrent relays are defined in this standard. Operating equations and allowances are provided in the standard. The standard defines an integral equation for microprocessor relays that ensures coordination not only in the case of constant current input but for any current condition of varying magnitude. Electromechanical inverse-time overcurrent relay reset characteristics are defined in the event that designers of microprocessor based relays and computer relays want to match the reset characteristics of the electromechanical relays.
Notes: "IEEE Std C37.112-1996."

"Approved 19 September 1996, IEEE Standards Board."

"27 January 1997"--Cover.

Includes bibliographical references.