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.
- Status
- Superseded Standard
- Superseded by
- 421.1-1986
- Board Approval
- 1971-12-02
- History
-
- Published:
- 1972-12-08
Working Group Details
No Active Projects
No Active Standards
No Superseded Standards
No Inactive-Withdrawn Standards
No Inactive-Reserved Standards