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IEEE C37.90

2005 Edition, September 22, 2005

Complete Document

Relays and Relay Systems Associated with Electric Power Apparatus

Includes all amendments and changes through Reaffirmation Notice , March 31, 2011


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Description / Abstract:

This standard specifies standard service conditions, standard ratings, performance requirements, and testing requirements for relays and relay systems used to protect and control power apparatus. A relay system may include computer interface equipment and/or communications interface equipment, such as a carrier transmitter/receiver or audio tone equipment. It does not cover relays designed primarily for industrial control, for switching communication or other low-level signals, or any other equipment not intended for control of power apparatus.

Purpose

The purpose of this standard is to establish a common reproducible basis for designing and evaluating relays and relay systems.