IEEE Standards Association
IEEE STANDARD
C37.90-1989 - IEEE Standard for Relays and Relay Systems Associated with Electric Power Apparatus
Description: This standard applies only to relays and relay systems used to protect and control power apparatus. The purpose of this standard is to specify standard service conditions, standard ratings, performance requirements, and requirements for testing of relays and relay systems associated with power apparatus.
- Status:
Oversight Committee: PE/PSR - Power System Relaying 
Sponsor: IEEE Power & Energy Society
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