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IEEE C37.90-1978

Historical Revision

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

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Revision Standard - Superseded.
This standard applies only to relays and relay systems used to control power switchgear. It does not cover relays of types designed primarily for industrial control, for switching of communication or other low-level signals, or any other equipment not intended for the control of power equipment.
The purpose of this standard is to specify standard service conditions, standard ratings, 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 Nov. 4, 1976
Language en - English
Page Count 30
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