1、Copyright 1998 IEEE All Rights Reserved 1IEEE Std 776-1992 (R2008)(Revision of IEEE Std 776-1987)IEEE Recommended Practice for Inductive Coordination of Electric Supply and Communication LinesSponsorTransmission Systems Committeeof theIEEE Communications SocietyReaffirmed September 25, 2008Approved
2、December 3, 1992IEEE Standards BoardAbstract: The inductive environment that exists in the vicinity of electric power and wire-linetelecommunications systems and the interfering effects that may be produced are addressed. An interfacethat permits either party, without need to involve the other, to v
3、erify the induction at the interface by use ofa probe wire is presented. This recommended practice does not apply to railway signal circuits.Keywords: communication lines, electric supply, inductive coordinationThe Institute of Electrical and Electronics Engineers, Inc.345 East 47th Street, New York
4、, NY 10017-2394, USACopyright 1993 by the Institute of Electrical and Electronics Engineers, Inc.All rights reserved. Published 1993. Printed in the United States of AmericaISBN 1-55937-281-8No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, wi
5、thout theprior written permission of the publisher.Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 17, 2009 at 15:46 from IEEE Xplore. Restrictions apply.IEEE Standardsdocuments are developed within the Technical Committees of theIEEE Societies and the Standards Coo
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14、 Institute of Electrical and ElectronicsEngineers without regard to whether their adoption may involve patents on articles,materials, or processes. Such adoption does not assume any liability to any patentowner, nor does it assume any obligation whatever to parties adopting the standardsdocuments.Au
15、thorized licensed use limited to: IEEE Standards Staff. Downloaded on October 24, 2008 at 12:18 from IEEE Xplore. Restrictions apply.Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 17, 2009 at 15:46 from IEEE Xplore. Restrictions apply.iiiIntroduction(This introduct
16、ion is not a part of IEEE Std 776-1992, IEEE Recommended Practice for Inductive Coordination of ElectricSupply and Communication Lines.)During the ve years since IEEE Std 776-1987 was published, the guide has provided a useful tool for thosefaced with inductive coordination problems. Questions have
17、arisen about the stringent harmonic distributionused on the probe-wire interface described in table 2. This version of IEEE Std 776 provides exibility in theuse of harmonic distributions in table 2 to match the variety of existing environments and conditions. The gen-eral section was also rewritten
18、in an effort to make it more understandable. Other sections have also beenimproved editorially. These efforts and contributions were made by Dick Nelson, Harold Held, Bill McCoy,Charlie Nelson, Chrys Chrysanthou, and David Boneau.Since the publication of joint reports of the National Electric Light
19、Association and the Bell System during andfollowing the 1920s, the joint responsibility of inductive coordination between power and telecommunicationcompanies has generally been accepted. However, the need has long been recognized for one document thatdenes the components of interference, provides s
20、pecic procedures to predict levels of interference, providesspecic methods to demonstrate cause and effect relationships, and denes a threshold for initiating coordina-tion to mitigate interference. The Longitudinal Induction Working Group, which is under the direction of theInductive Coordination a
21、nd Electrical Protection (ICEP) Subcommittee of the Transmission Systems Commit-tee of the Communications Society, has struggled to produce a fair and equitable approach to ll this need underthe leadership of three different chairs. These chairs were, rst, Harold C. Held, retired from Illinois Bell
22、Tele-phone Company; second, the late James R. Wilson, formerly afliated with South Central Bell Telephone Com-pany; and third, David Lee Boneau of Southwestern Bell Telephone Company. Major contributions to thedocument were made by James R. Wilson, George Benz of Southern New England Telephone Compa
23、ny, andDavid Boneau. Members of the Oklahoma Power and Communications Association (originally the OklahomaInductive Coordination Association) furthered the development of the document by eld testing and assuringthe validity of the various calculations and measurement techniques. Many others have rev
24、iewed and helped toformulate a guide that is usable by both power and telecommunication company personnel.ParticipantsLongitudinal Induction Working Group members at the time of balloting are as follows:David Lee Boneau,ChairG. Y. R. Allen D. Huber H. E. NerhoodJ. Allison D. P. Hartmann S. D. Overby
25、M. J. Anna W. M. Haynes, Jr. P. PoolC. Chrysanthou H. C. Held K. SabineW. Dabisza R. G. Jones M. S. TibenskyJ. S. Gallatin J. F. Laidig W. B. WilkensR. F. Gundrum W. J. McCoy R. G. WunderC. D. Hansell C. R. Nelson L. S. YoungR. E. NelsonAuthorized licensed use limited to: IEEE Standards Staff. Downl
26、oaded on October 24, 2008 at 12:18 from IEEE Xplore. Restrictions apply.Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 17, 2009 at 15:46 from IEEE Xplore. Restrictions apply.ivLongitudinal Induction Working Group members at the time of the 1987 version were as foll
27、ows:David Lee Boneau,ChairG. Y. R. Allen D. P. Hartmann J. F. LaidigJ. E. Allison W. M. Haynes, Jr. W. J. McCoyM. J. Anna H. C. Held R. E. NelsonG. W. Benz L. M. Himmel, Sr. H. E. NerhoodW. Dabisza P. Jackson S. D. OverbyL. W. Grovenstein R. G. Jones R. W. ParkerR. Gundrum A. K. Knowles H. R. Steven
28、sonS. W. Guzik G. H. Kuhn J. ThorsonC. D. Hansell M. S. TibenskyThe following persons were on the balloting committee that approved this document for submission to the IEEEStandards Board:G. Y. R. Allen D. Huber H. E. NerhoodJ. Allison D. P. Hartmann S. D. OverbyM. J. Anna W. M. Haynes, Jr. P. PoolC
29、. Chrysanthou H. C. Held K. SabineW. Dabisza R. G. Jones M. S. TibenskyJ. S. Gallatin J. F. Laidig W. B. WilkensR. F. Gundrum W. J. McCoy R. G. WunderC. D. Hansell C. R. Nelson L. S. YoungR. E. NelsonAuthorized licensed use limited to: IEEE Standards Staff. Downloaded on October 24, 2008 at 12:18 fr
30、om IEEE Xplore. Restrictions apply.Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 17, 2009 at 15:46 from IEEE Xplore. Restrictions apply.vWhen the IEEE Standards Board approved this standard on December 3, 1992, it had the following member-ship: Marco W. Migliaro,C
31、hairDonald C. Loughry,Vice ChairAndrew G. Salem,SecretaryDennis Bodson Donald N. Heirman T. Don Michael*Paul L. Borrill Ben C. Johnson John L. RankineClyde Camp Walter J. Karplus Wallace S. ReadDonald C. Fleckenstein Ivor N. Knight Ronald H. ReimerJay Forster* Joseph Koepnger* Gary S. RobinsonDavid
32、F. Franklin Irving Kolodny Martin V. SchneiderRamiro Garcia D. N. Jim Logothetis Terrance R. WhittemoreThomas L. Hannan Lawrence V. McCall Donald W. Zipse*Member EmeritusAlso included are the following nonvoting IEEE Standards Board liaisons:Satish K. AggarwalJames BeallRichard B. EngelmanDavid E. S
33、offrinStanley WarshawRochelle L. SternIEEE Standards Project EditorAuthorized licensed use limited to: IEEE Standards Staff. Downloaded on October 24, 2008 at 12:18 from IEEE Xplore. Restrictions apply.Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 17, 2009 at 15:4
34、6 from IEEE Xplore. Restrictions apply.viContents1. Scope 12. References 13. General. 23.1 Inductive interference 23.2 Need for coordination 33.3 Mutual responsibility of parties involved 34. The inductive environment 34.1 Guidelines for an acceptable environment. 34.2 Methods of measurement. 124.3
35、Methods of prediction 225. Coordination within the inductive environment 295.1 General Coordination Methods 295.2 Specific coordination methods. 306. Administrative methods and procedures 326.1 Intercompany meetings and contacts. 326.2 Mitigation of specific interference cases 327. Bibliography 34An
36、nex A Example calculations 35A.1Prediction calculations. 35A.2Mitigation calculations. 49Annex B Decibel, power, and C-message noise . 52Authorized licensed use limited to: IEEE Standards Staff. Downloaded on October 24, 2008 at 12:18 from IEEE Xplore. Restrictions apply.Authorized licensed use limi
37、ted to: IHS Stephanie Dejesus. Downloaded on February 17, 2009 at 15:46 from IEEE Xplore. Restrictions apply.1IEEE Recommended Practice forInductive Coordination of Electric Supply and Communication Lines1. ScopeThis recommended practice addresses the inductive environment that exists in the vicinit
38、y of electric powerand wire-line telecommunications systems and the interfering effect that may be produced thereby; guidanceis offered for the control or modication of the environment and the susceptibility of the affected systems inorder to maintain an acceptable level of interference.To aid the u
39、ser of this recommended practice in calculating induction between power and telecommunica-tion lines, the concept of an interface is developed. This recommended practice permits either party, withoutneed to involve the other, to verify the induction at the interface by use of a probe wire. This reco
40、mmendedpractice does not apply to railway signal circuits.2. ReferencesThis standard shall be used in conjunction with the following publications:IEEE Std 81-1983, IEEE Guide for Measuring Earth Resistivity, Ground Impedance, and Earth SurfacePotentials of a Ground System (ANSI).1IEEE Std 367-1987,
41、IEEE Recommended Practice for Determining the Electric Power Station GroundPotential Rise and Induced Voltage from a Power Fault (ANSI).IEEE Std 487-1992, IEEE Recommended Practice for the Protection of Wire-Line Communication FacilitiesServing Electric Power Stations (ANSI).IEEE Std 789-1988, IEEE
42、Standard Performance Requirements for Communications and Control Cables forApplication in High Voltage Environments (ANSI).IEEE Std 820-1984 (Reaff 1992), IEEE Standard Telephone Loop Performance Characteristics (ANSI).IEEE Std 1137-1991, IEEE Guide for the Implementation of Inductive Coordination M
43、itigation Techniques(ANSI).1IEEE publications are available from the Institute of Electrical and Electronics Engineers, Service Center, 445 Hoes Lane, P.O. Box1331, Piscataway, NJ 08855-1331, USA.Authorized licensed use limited to: IEEE Standards Staff. Downloaded on October 24, 2008 at 12:18 from I
44、EEE Xplore. Restrictions apply.Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on February 17, 2009 at 15:46 from IEEE Xplore. Restrictions apply.IEEEStd 776-1992 IEEE RECOMMENDED PRACTICE FOR INDUCTIVE23. General3.1 Inductive interferenceInductive interference is dened as an e
45、ffect, arising from the characteristics and inductive relations of elec-tric supply and telecommunication systems. It is of such character and magnitude that it would prevent thetelecommunication circuits from rendering service satisfactorily and economically if methods of inductivecoordination were
46、 not applied. Inductive interference is produced by the simultaneous coexistence of threefactors:a) An inductive inuenceb) A coupling mechanism between two electrical systems or circuits, one of which produces theinuencec) A susceptibility of the second system or circuit to interferenceWhile inducti
47、ve interference may occur at any time the above conditions are satised, the majority of casesand the principal concern of this recommended practice involve interference in telecommunication systemsas a result of their proximity to electric power systems. Therefore, subsequent discussion is limited t
48、o thatgeneral case, although the principles and practices may apply to other cases as well.3.1.1 Inductive inuence Inductive inuence is dened as those characteristics of an electric supply circuit that determine the charac-ter and intensity of the inductive eld that it produces. The voltage and curr
49、ent present on an operatingpower system produce electric and magnetic elds in the vicinity of the system. The character and intensityof those elds determine the inductive inuence. Character is related primarily to the frequencies present,while intensity is related to the magnitude of voltages and currents modied by line conguration, currentdistribution, and any shielding structures in the immediate vicinity, excluding the shield of a telecommunica-tions cable.3.1.2 CouplingCoupling is dened as the transfer of energy from one system to another. For the in
