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IEEE C37.90-1989

Historical Revision

IEEE Standard for Relays and Relay Systems Associated with Electric Power Apparatus

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Revision Standard - Superseded. Superseded by IEEE Std C37.90-2005. This standard applies to relay systems that protect and control apparatus that generate, and distribute and use electric power. This standard defines service conditions and specifies relay performance requirements and performance information that relay manufacturers shall provide.
This standard applies only to relays and relay systems used to protect and control power apparatus. 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 the control of 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.

SDO IEEE: Institute of Electrical and Electronics Engineers
Document Number C37.90
Publication Date Dec. 28, 1989
Language en - English
Page Count 12
Revision Level
Supercedes
Committee Power System Relaying and Control
Publish Date Document Id Type View
Jan. 31, 2006 C37.90-2005 Revision
Dec. 28, 1989 C37.90-1989 Revision
Nov. 4, 1976 C37.90-1978 Revision