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IEEE C37.90
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IEEE C37.90 2005 Edition, September 22, 2005 Relays and Relay Systems Associated with Electric Power Apparatus
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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.
Purpose
The purpose of this standard is to establish a common reproducible basis for designing and evaluating relays and relay systems.