C37.112-1996 IEEE Standard Inverse-Time Characteristic Equations for Overcurrent Relays

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Organization: IEEE - Institute of Electrical and Electronics Engineers, Inc.
Publication Date: 1 January 1997
Status: active
Page Count: 20
ICS Code (Relays): 29.120.70
ISBN (Paper): 1-55937-887-5
ISBN (Online): 0-7381-0913-4
DOI: 10.1109/IEEESTD.1997.81576

Abstracts

Standard

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.

Document History

C37.112-1996 - IEEE Standard Inverse-Time Characteristic Equations for Overcurrent Relays
January 1, 1997 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

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 a...

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