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eLibrary > IEEE Standard for the Electrical Protection of Communication Facilities Serving Electric Supply Locations Through the Use of Neutralizing Transformers (Published) >

IEEE Standard for the Electrical Protection of Communication Facilities Serving Electric Supply Locations Through the Use of Neutralizing Transformers (Published), 2013

This document is reproduced and distributed under license from The Institute of Electrical and Electronics Engineers, Incorporated (IEEE), 445 Hoes Lane, Piscataway, New Jersey 08854 and is protected by United States and international copyright laws and treaties. No part of this publication may be reproduced, in any form and in any medium, without the prior written consent of the IEEE. If you have any questions, please contact MADCAD.com at support@madcad.com or call at 1.800.798.9296.

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IEEE Standard for the Electrical Protection of Communication Facilities Serving Electric Supply Locations Through the Use of Neutralizing Transformers (Published), 2013

IEEE Std 487.4-2013 Front Cover
Title page
Notice to users [Go to Page]
Laws and regulations
Copyrights
Updating of IEEE documents
Errata
Patents
Participants
Introduction
Contents
Important notice
1. Overview [Go to Page]
1.1 Background
1.2 Scope
1.3 Purpose
2. Normative references
3. Definitions [Go to Page]
3.1 Definitions, acronyms, and abbreviations
3.2 Acronyms and abbreviations
4. Neutralizing transformer and neutralizing reactors operation [Go to Page]
4.1 Three-winding neutralizing transformer
4.2 Two-winding neutralizing reactor
4.3 Remanent voltage
4.4 Flux, remanent flux, and exciting current
4.5 Saturation
4.6 Recovery
4.7 Worst-case considerations—volt-seconds and the applied voltage
4.8 Polarization of the neutralizing transformer or reactor core
4.9 Reduction of volt-time requirements from worst case
4.10 Paralleling neutralizing transformers or reactors
5. Protection application configurations [Go to Page]
5.1 Protection configurations employing neutralizing transformers
5.2 Protection configuration employing neutralizing in parallel with isolation on separate pairs
5.3 Protection configuration employing neutralizing in tandem with isolation
6. Installation considerations related to neutralizing transformers
Annex A (informative) Bibliography
Annex B (informative) Neutralizing transformer and reactor concept—design alternatives [Go to Page]
B.1 Preliminary considerations
B.2 Standardized design method
B.3 Custom design method
B.4 Alternative simplified design
B.5 Number of good cycles approach
B.6 Worst-case design considerations
B.7 Considerations for other than worst-case design
B.8 Typical specifications for neutralizing transformers
B.9 Use of dc blocking or ac exciting capacitors, or both
B.10 User information required for preparing a neutralizing transformer design specification
B.11 Neutralizing transformer installation design examples
Annex C (informative) Typical neutralizing transformers [Go to Page]
C.1 Single-pair neutralizing transformers
C.2 Multi-pair neutralizing transformers [Go to Page]

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IEEE Standard for the Electrical Protection of Communication Facilities Serving Electric Supply Locations Through the Use of Neutralizing Transformers (Published), 2013

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