IEEE 421.4:2004

Revision Standard - Superseded.
This guide is intended to provide to the specification writer the information to prepare a specification for the purchase of an excitation system. This guide is presented in narrative form with descriptions of functions typical of excitation systems. Narrative is provided describing types of excitation systems and information required for sizing the excitation system.

Application information is being provided to help specify excitation systems. Scope includes review of this document and revisions/additions based on updated information and equipment.
The application information is being incorporated to give the user the guidelines and background data required to specify excitation systems. Updates based on modern equipment will be provided. The benefit it properly specified equipment that meets user needs.