1、 IEEE Guide on Shielding Practice for Low Voltage Cables Sponsored by the Insulated Conductors Committee IEEE 3 Park Avenue New York, NY 10016-5997 USA 4 March 2013 IEEE Power and Energy Society IEEE Std 1143-2012 (Revision of IEEE Std 1143-1994) IEEE Std 1143-2012 (Revision of IEEE Std 1143-1994) I
2、EEE Guide on Shielding Practice for Low Voltage Cables Sponsor Insulated Conductors Committee of the IEEE Power and Energy Society Approved 5 December 2012 IEEE-SA Standards BoardApproved 27 October 2014American National Standards InstituteGrateful acknowledgements: Thanks to Belden Inc., General Ca
3、ble Corporation, RFI Corporation, Parker-Hannifin low Corporation, Chomerics Division, and Interference Control Technologies, Inc., for permission to use certain figures and tables in this guide. Abstract: A concise overview of shielding options for various types of interference is discussed in this
4、 guide. Recommendations on shielding practices for low voltage cables are given. Suggestions on terminating and grounding methods are provided. Keywords: cable shielding, cable terminations, electromagnetic interference, grounding, IEEE 1143, low voltage cables The Institute of Electrical and Electr
5、onics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA Copyright 2013 by The Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 4 March 2013. Printed in the United States of America. IEEE is a registered trademark in the U.S. Patent +1 978 750 8400. Per
6、mission to photocopy portions of any individual standard for educational classroom use can also be obtained through the Copyright Clearance Center. Copyright 2013 IEEE. All rights reserved. iv Notice to users Laws and regulations Users of IEEE Standards documents should consult all applicable laws a
7、nd regulations. Compliance with the provisions of any IEEE Standards document does not imply compliance to any applicable regulatory requirements. Implementers of the standard are responsible for observing or referring to the applicable regulatory requirements. IEEE does not, by the publication of i
8、ts standards, intend to urge action that is not in compliance with applicable laws, and these documents may not be construed as doing so. Copyrights This document is copyrighted by the IEEE. It is made available for a wide variety of both public and private uses. These include both use, by reference
9、, in laws and regulations, and use in private self-regulation, standardization, and the promotion of engineering practices and methods. By making this document available for use and adoption by public authorities and private users, the IEEE does not waive any rights in copyright to this document. Up
10、dating of IEEE documents Users of IEEE Standards documents should be aware that these documents may be superseded at any time by the issuance of new editions or may be amended from time to time through the issuance of amendments, corrigenda, or errata. An official IEEE document at any point in time
11、consists of the current edition of the document together with any amendments, corrigenda, or errata then in effect. In order to determine whether a given document is the current edition and whether it has been amended through the issuance of amendments, corrigenda, or errata, visit the IEEE-SA Websi
12、te at http:/standards.ieee.org/index.html or contact the IEEE at the address listed previously. For more information about the IEEE Standards Association or the IEEE standards development process, visit IEEE-SA Website at http:/standards.ieee.org/index.html. Errata Errata, if any, for this and all o
13、ther standards can be accessed at the following URL: http:/standards.ieee.org/findstds/errata/index.html. Users are encouraged to check this URL for errata periodically. Patents Attention is called to the possibility that implementation of this standard may require use of subject matter covered by p
14、atent rights. By publication of this standard, no position is taken by the IEEE with respect to the existence or validity of any patent rights in connection therewith. If a patent holder or patent applicant has filed a statement of assurance via an Accepted Letter of Assurance, then the statement is
15、 listed on the IEEE-SA Website at http:/standards.ieee.org/about/sasb/patcom/patents.html. Letters of Assurance may indicate whether the Submitter is willing or unwilling to grant licenses under patent rights without compensation or under reasonable rates, with reasonable terms and conditions that a
16、re demonstrably free of any unfair discrimination to applicants desiring to obtain such licenses. Copyright 2013 IEEE. All rights reserved. v Essential Patent Claims may exist for which a Letter of Assurance has not been received. The IEEE is not responsible for identifying Essential Patent Claims f
17、or which a license may be required, for conducting inquiries into the legal validity or scope of Patents Claims, or determining whether any licensing terms or conditions provided in connection with submission of a Letter of Assurance, if any, or in any licensing agreements are reasonable or non-disc
18、riminatory. Users of this standard are expressly advised that determination of the validity of any patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Further information may be obtained from the IEEE Standards Association. Copyright 2013 IEEE. All right
19、s reserved. viParticipants At the time this IEEE guide was completed, the D11W Working Group had the following membership: Kenneth E. Bow, Chair Michael G. Bayer, Vice Chair William G. Bloethe Eric Bulington John R. Cancelosi Steven Graham Ajit K. Gwal Robert L. Konnik Gerald Liskom Arturo Maldonado
20、 John E. Merando, Jr. Nader Moubed Gilad Shoshani Richard Williamson The following members of the balloting committee voted on this guide. Balloters may have voted for approval, disapproval, or abstention. William Ackerman Roy Alexander Saleman Alibhay John Barker Hugh Barrass Earle Bascom III Micha
21、el G. Bayer William G. Bloethe Kenneth E. Bow William Byrd Thomas Campbell John Cancelosi Suresh Channarasappa Jacques Cote Gary Donner Randall Dotson Donald Dunn Gary Engmann Frank Gerleve David Gilmer Steven Graham Randall Groves Werner Hoelzl David Horvath Joseph Jancauskas A. Jones John Kay Gael
22、 Kennedy Yuri Khersonsky Chad Kiger Joseph L. Koepfinger Robert Konnik Jim Kulchisky Chung-Yiu Lam Michael Lauxman Gerald Liskom Greg Luri Daniel Mainstruck Arturo Maldonado William McBride John Merando, Jr. C. Michael Miller Jerry Murphy Arthur Neubauer Michael S. Newman NickS.A Nikjoo Lorraine Pad
23、den Bansi Patel Johannes Rickmann Michael Roberts Bartien Sayogo Gilad Shoshani Gil Shultz Michael Smalley Jerry Smith Nagu Srinivas Gary Stoedter David Tepen Peter Tirinzoni John Vergis Mark Walton Yingli Wen Kenneth White Jian Yu Dawn Zhao Copyright 2013 IEEE. All rights reserved. viiWhen the IEEE
24、-SA Standards Board approved this guide on 5 December 2012, it had the following membership: Richard H. Hulett, Chair John Kulick, Vice Chair Robert M. Grow, Past Chair Konstantinos Karachalios, Secretary Satish Aggarwal Masayuki Ariyoshi Peter Balma William Bartley Ted Burse Clint Chaplin Wael Will
25、iam Diab Jean-Phillippe Faure Alexander Gelman Paul Houz Jim Hughes Young Kyun Kim Joseph L. Koepfinger* John Kulick David J. Law Thomas Lee Hung Ling Oleg Logvinov Ted Olsen Gary Robinson Jon Walter Rosdahl Mike Seavey Yatin Trivedi Phil Winston Yu Yuan *Member Emeritus Also included are the follow
26、ing nonvoting IEEE-SA Standards Board liaisons: Richard DeBlasio, DOE Representative Michael Janezic, NIST Representative Michelle D. Turner IEEE Standards Program Manager, Document Development Erin Spiewak IEEE Standards Program Manager, Technical Program Development Copyright 2013 IEEE. All rights
27、 reserved. viii Introduction This introduction is not part of IEEE Std 1143-2012, IEEE Guide on Shielding Practice for Low Voltage Cables. This project will provide a revision to the Guide on Shielding Practice for Low Voltage Cables. Insulated Conductors Committee (ICC) Working Group D11W, under IC
28、C Subcommittee D, prepared this revision. The guide will be helpful for users of low voltage cable to understand how shielding works, to choose an appropriate shielding system to address the type of interference being encountered and to be able to be familiar with the test protocols to measure shiel
29、ding effectiveness. The revision will focus on shielding techniques and defer the discussion of theory and sources of interference to other appropriate IEEE documents by reference. The document will be of greatest use to cable users for control systems in industrial plants, generating stations, and
30、substations. The experts contributing to the document will be cable manufacturers, material suppliers, and knowledgeable engineers. The document will be useful to consultants and engineers in engineering firms who design and build control systems for various plants and facilities. Background on 1994
31、 version: A guide on the use of shielding on low voltage cables was proposed in Subcommittee No. 9 of the Insulated Conductors Committee due to the lack of a single source of information on this topic. For example, information on shielding of medium voltage and high voltage cables was available in s
32、everal documents, but the same could not be said for low voltage cable. Subsequently, a task group was formed to develop the guide. The task group began its work by preparing a bibliography of the information by key topic. These topics eventually made their way into an outline of the guide. A first
33、draft was prepared, and after review and comment, the draft was broken into two sections: Section I, covering shielding; and Section II, providing background information on the need for shielding. This approach was taken because an understanding of the need for shielding helps achieve the purpose of
34、 the guidewhich is to provide the user with an understanding of cable shielding practices for low voltage cables. Copyright 2013 IEEE. All rights reserved. ix Contents 1. Overview 1 1.1 Scope . 1 1.2 Purpose 1 1.3 Application 2 2. Acronyms . 2 3. Nature of interference . 3 3.1 General 3 3.2 Definiti
35、on of sources . 4 3.3 Source-circuit interaction . 4 3.4 Types of interference . 5 3.5 Sources of electromagnetic interference (EMI) . 6 3.6 Radiated interference . 8 4. Types of cable shielding . 8 4.1 Introduction . 8 4.2 Coupling through apertures 12 4.3 Solid tube shield .13 4.4 Single layer foi
36、l shield with drain wire .14 4.5 Multilayer Shield with Drain Wire .14 4.6 Helical/Spiral shield .16 4.7 Braided wire shield .17 4.8 Combination shields .18 4.9 Overall shields 18 4.10 Conductive plastics .21 4.11 Shield and armor options 21 4.12 Balanced mode transmission on twisted pairs 25 4.13 B
37、alanced mode transmission on shielded twisted pairs 28 4.14 Twisted pairs for transmission of high-speed data30 5. Shielding application principles 31 5.1 Functions 31 5.2 Single or multi-conductor .32 5.3 Dedicated or multiplexed 32 5.4 Cable construction types .32 5.5 Shielded cable selection appl
38、ication guide 32 6. Grounding and installation 43 6.1 Introduction 43 6.2 Shield grounded at one end .43 6.3 Shield grounded at both ends 44 6.4 Transient protection with overall shields 44 6.5 Grounding of cable with foil shields and overall shields 47 7. Shield testing methods .50 7.1 General .50
39、7.2 Continuous wave test methods .50 7.3 Testing of overall shield for single or multi-conductor cable .53 8. Characterization of shielding .57 Copyright 2013 IEEE. All rights reserved. x 8.1 General .57 8.2 Shielding properties 57 8.3 Architectural shielding effectiveness 58 8.4 Transfer impedance
40、60 8.5 Shielding effectiveness of overall shield 62 8.6 Reduction factor with overall shields .63 8.7 Transient (lightning) protection by overall shields .64 8.8 Aging effect on shielding 65 Annex A (informative) Bibliography 73 Annex B (informative) Glossary .78 Copyright 2013 IEEE. All rights rese
41、rved. 1 IEEE Guide on Shielding Practice for Low Voltage Cables IMPORTANT NOTICE: IEEE Standards documents are not intended to ensure safety, health, or environmental protection, or ensure against interference with or from other devices or networks. Implementers of IEEE Standards documents are respo
42、nsible for determining and complying with all appropriate safety, security, environmental, health, and interference protection practices and all applicable laws and regulations. This IEEE document is made available for use subject to important notices and legal disclaimers. These notices and disclai
43、mers appear in all publications containing this document and may be found under the heading “Important Notice” or “Important Notices and Disclaimers Concerning IEEE Documents.” They can also be obtained on request from IEEE or viewed at http:/standards.ieee.org/IPR/disclaimers.html. 1. Overview 1.1
44、Scope This function of this guide on shielding practice for low voltage cables is to inform and familiarize the reader with shielding practice. Overviews of shielding practice, systems and test methods are provided. These tests may not be standardized; however, they are included to inform the reader
45、 and provide an overview as to what has been done to characterize shielding. This guide provides the following: a review of shielding techniques to control electrostatic and electromagnetic interference for varying types of low voltage cable used for power, control and instrumentation services, incl
46、uding signal and communications cable; an overview of the functional characteristics of various types of shielding; suggested tests or techniques for measuring shielding effectiveness; recommendations on shielding practices, including suggestions on terminating and grounding methods.1.2 Purpose The
47、main purpose of this guide is to show how shielding can minimize the effects of electrostatic and electromagnetic interference. A secondary purpose is to provide recommendations on shielding practice for various applications including suggestions on terminating and grounding methods. IEEE Std 1143-2
48、012 IEEE Guide on Shielding Practice for Low Voltage Cables Copyright 2013 IEEE. All rights reserved. 2 1.3 Application This guide shall apply to low voltage (rated 600 V) control and instrumentation or signal cables. This guide does not apply to fiber optic cables since such cables are immune to el
49、ectromagnetic interference; see IEEE Std 1428 -2004 B61.1,2, 32. Acronyms NOTEDefinitions are in Annex B.4ASD adjustable speed drive CAT category cable CATV community antenna television CW continuous wave EFT electrical fast transient EGC equipment grounding conductor EIA Electronic Industries Alliance EMC electromagnetic compatibility EMI electromagnetic interference EPR ethylene propylene rubber ESD electrostatic discharge FCC Federal Communications Commission FEXT far end crosstalk F/UTP foil / unshielded twisted pair FTP foil twisted pair IED intelli
