IEEE 421.4:2014

Revision Standard - Active.
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.

This guide provides the necessary material to the specification writer in order to prepare the specification for the procurement of an excitation system for a synchronous machine. The information presented in this guide is given in narrative form with the descriptions and functions of particular features that should be examined in preparing the specifications. This guide also identifies the most modernized industry functions as it pertains to preparing specifications for the procurement.
The specific intent of this guide is to provide the user with guidelines and background data required to specify excitation systems. This guide will illustrate properly specified equipment used in specifying excitation systems. The benefit is to properly specify equipment that meets end user needs.