IEEE Standards Association
IEEE STANDARD
C37.90-2005 - IEEE Standard for Relays and Relay Systems Associated with Electric Power Apparatus
Description: Service conditions, electrical ratings, thermal ratings, and testing requirements are defined for relays and relay systems used to protect and control power apparatus. This standard establishes a common reproducible basis for designing and evaluating relays and relay systems.
- Status:
Oversight Committee: PE/PSR - Power System Relaying 
Sponsor: IEEE Power & Energy Society
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