IEEE C37.90 Standard for Relays and Relay Systems Associated with Electric Power Apparatus
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IEEE C37.90 Document Information:
Title
Standard for Relays and Relay Systems Associated with Electric Power Apparatus
The Institute of Electrical and Electronics Engineers, Inc.
Publication Date:
Sep 22, 2005
Scope:
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.
Keywords:
- protection relay
- temperature range
- dielectric test
- temperature rise
- ac component in dc
- voltage range
- current range
- humidity
- contact rating
- power apparatus
- impulse test
- insulation test
- derating
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