Standard

IEEE 421-1972

Revised

Corrigendums and amendments are bought separately.

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Abstract

New IEEE Standard - Superseded. This document presents criteria, essential elements, and new and revised definitions for excitation systems as applied to electric utility synchronous machines with particular emphasis given to the application of solid-state devices and to terminology common to feedback control systems.

Document information

  • Standard from IEEE
  • Published:
  • Document type: IS
  • Pages
  • Publisher IEEE
  • Distributor IEEE
  • Technical Committee /

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  • Revised by: IEEE 421.1-1986
  • Referred by: IEEE 421B-1979
  • Refers: ANSI C85.1-1963, Terminology for Automatic Control (Including Supplement C85.1a-1966).