This document is intended to serve as basic reference for the specification and design of field discharge circuits for synchronous machines. It is also intended to provide detailed information about field discharge that complements standards "IEEE 421.4.-2004 Guide for Preparation of Excitation System Specification" and includes many aspects of the withdrawn standard "ANSI/IEEE C37.18.1979 Standard Enclosed Field Discharge Circuit Breakers". This document shows the most employed field discharge circuits and defines the main design criteria and conditions for the main components of field discharge circuit for synchronous machines.
- Sponsor Committee
- PE/EDPG - Energy Development & Power Generation
Learn More About PE/EDPG - Energy Development & Power Generation - Status
- Active Standard
- PAR Approval
- 2013-02-01
- Board Approval
- 2017-03-23
- History
-
- ANSI Approved:
- 2018-08-16
- Published:
- 2017-06-09
Working Group Details
- Society
- IEEE Power and Energy Society
Learn More About IEEE Power and Energy Society - Sponsor Committee
- PE/EDPG - Energy Development & Power Generation
Learn More About PE/EDPG - Energy Development & Power Generation - Working Group
-
ESCS - WG 421.6 - Excitation Systems and Controls Subcommittee (ESCS) -WG 421.6
- IEEE Program Manager
- Vanessa Lalitte
Contact Vanessa Lalitte - Working Group Chair
- Robert Thornton-Jones
Other Activities From This Working Group
Current projects that have been authorized by the IEEE SA Standards Board to develop a standard.
No Active Projects
Standards approved by the IEEE SA Standards Board that are within the 10-year lifecycle.
421.2-2014
IEEE Guide for Identification, Testing, and Evaluation of the Dynamic Performance of Excitation Control Systems
This guide includes criteria, definitions, and test procedures for evaluating the dynamic performance of excitation control systems for synchronous machines as applied by electric utilities.
These standards have been replaced with a revised version of the standard, or by a compilation of the original active standard and all its existing amendments, corrigenda, and errata.
421.1-1986
IEEE Standard Definitions for Excitation Systems for Synchronous Machines
Elements and commonly used components in excitation control systems and for excitation systems as applied to synchronous machines are defined. The primary purpose of the standard is to provide a vocabulary for writing excitation systems specifications, evaluating excitation system performance, specifying methods for excitation system tests, and preparing excitation system standards. It is also intended to serve as an educational aid for those becoming acquainted with excitation systems.
421.3-1997
IEEE Standard for High-Potential Test Requirements for Excitation Systems for Synchronous Machines
High-potential test voltages for excitation systems used with synchronous machines are established. Test voltages are established based on whether equipment is connected to the exciter power circuit or is electrically isolated from the exciter power circuit.
421.4-2004
IEEE Guide for the Preparation of Excitation System Specifications
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.
These standards have been removed from active status through a ballot where the standard is made inactive as a consensus decision of a balloting group.
No Inactive-Withdrawn Standards
These standards are removed from active status through an administrative process for standards that have not undergone a revision process within 10 years.
No Inactive-Reserved Standards