IEEE 635-2003 en Guide for Selection and Design of Aluminum Sheaths for Power Cables《电力电缆铝护套的选择和设计指南》.pdf

1、IEEE Std 635-2003IEEE Standards635TMIEEE Guide for Selection and Design ofAluminum Sheaths for Power CablesPublished by The Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USA14 May 2004IEEE Power Engineering SocietySponsored by theInsulated Conductors

2、CommitteeIEEE StandardsPrint: SH95188PDF: SS95188Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on June 16,2010 at 16:59:01 UTC from IEEE Xplore. Restrictions apply. The Institute of Electrical and Electronics Engineers, Inc.3 Park Avenue, New York, NY 10016-5997, USACopyright

3、 2004 by the Institute of Electrical and Electronics Engineers, Inc.All rights reserved. Published 8 June 2005. Printed in the United States of America.IEEE is a registered trademark in the U.S. Patent (978) 750-8400. Permission to photocopy portions of any individual standard for educationalclassro

4、om use can also be obtained through the Copyright Clearance Center.Note: Attention is called to the possibility that implementation of this standard may require use of subject mat-ter covered by patent rights. By publication of this standard, no position is taken with respect to the existence orvali

5、dity of any patent rights in connection therewith. The IEEE shall not be responsible for identifying patentsfor which a license may be required by an IEEE standard or for conducting inquiries into the legal validity orscope of those patents that are brought to its attention.Authorized licensed use l

6、imited to: IHS Stephanie Dejesus. Downloaded on June 16,2010 at 16:59:01 UTC from IEEE Xplore. Restrictions apply. Copyright 2004 IEEE. All rights reserved.iiiIntroduction(This introduction is not part of IEEE Std 635-2003, IEEE Guide for Selection and Design of Aluminum Sheaths forPower Cables.)Thi

7、s guide is concerned with the selection and design of aluminum sheaths for low-, medium-, high-, andextra high-voltage power cables. An aluminum sheath is defined as “an impervious aluminum or aluminumalloy tube, either smooth or corrugated, which is applied over a cable core to provide mechanicalpr

8、otection.” It may or may not have a jacket. Users may note that this guide makes reference to standardsdeveloped by other organizations. These references are useful for understanding the content of the guide.The guide is written for those persons with responsibilities for installing and using cable

9、with an aluminumsheath. The purpose of the guide is to establish design guidelines, basic installation, and use parameters.References and a bibliography related to the subject are also provided.The guide is aimed at providing more detail for the application of aluminum sheaths. However, the topicsco

10、vered in this guide are not exhaustive in every aspect of cable sheath design or performance.The guide represents the work of Working Group A15W of Subcommittee A of the Insulated ConductorsCommittee, Power Engineering Society. Grateful acknowledgement is given to the individuals who contrib-uted to

11、 the revision of this guide. This is the second revision to this guide originally issued in 1980 andrevised in 1989.The users of this guide are cautioned that all data contained herein are presented for information purposesonly. Where deemed necessary, additional, as well as more detailed, informati

12、on should be obtained by con-sultation with the cable manufacturer and other experts in the field.Notice to usersErrataErrata, if any, for this and all other standards can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/updates/errata/index.html. Users are encouraged to check

13、 this URL for errata periodically.InterpretationsCurrent interpretations can be accessed at the following URL: http:/standards.ieee.org/reading/ieee/interp/index.html.ParticipantsThe following is a list of participants in the Working Group A15W of Subcommittee A of the Insulated Con-ductors Committe

14、e and other contributors: Kenneth Bow,ChairTommy CooperGary EngmannLauri J. HiivalaAjit HiranandaniDavid JacksonRoger LawrenceJohn MerandoShantanu NandiJohannes RickmannAuthorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on June 16,2010 at 16:59:01 UTC from IEEE Xplore. Restriction

15、s apply. ivCopyright 2004 IEEE. All rights reserved.The following members of the balloting committee voted on this guide. Balloters may have voted forapproval, disapproval, or abstention. When the IEEE-SA Standards Board approved this standard on 10 December 2003, it had the followingmembership:Don

16、Wright,ChairHoward M. Frazier,Vice ChairJudith Gorman,Secretary*Member EmeritusAlso included are the following nonvoting IEEE-SA Standards Board liaisons:Alan Cookson, NIST RepresentativeSatish K. Aggarwal, NRC RepresentativeNoelle D. Humenick IEEE Standards Project EditorKenneth BowJack CherryJohn

17、CooperTommy CooperJames DalyAmir El-SheikhGary EngmannWolfgang B. Haverkamp Lauri J. HiivalaAjit HiranandaniEdward Horgan Jr.David JacksonGeorge KalacherryAlbert KongRoger LawrenceGregory LuriGlenn LuzziJohn MerandoGary MichelDaleep C. MohlaShantanu NandiGregory RampleyJohannes RickmannJames Ruggier

18、iWilliam D. WilkensH. Stephen BergerJoseph A. BruderBob DavisRichard DeBlasioJulian Forster*Toshio FukudaArnold M. GreenspanRaymond HapemanDonald N. HeirmanLaura HitchcockRichard H. HulettAnant Kumar JainLowell G. JohnsonJoseph L. Koepfinger*Tom McGeanSteve M. MillsDaleep C. MohlaWilliam J. MoylanPa

19、ul NikolichGary S. RobinsonMalcolm V. ThadenGeoffrey O. ThompsonDoug ToppingHoward L. WolfmanAuthorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on June 16,2010 at 16:59:01 UTC from IEEE Xplore. Restrictions apply. Copyright 2004 IEEE. All rights reserved.vContents1. Overview 11.1

20、Purpose. 11.2 Scope 12. References 13. Definitions 24. Advantages and limitations of aluminum sheaths . 24.1 Advantages. 34.2 Limitations . 35. Applications . 45.1 Background 45.2 Products and installation conditions 46. Aluminum metals and alloys . 56.1 General. 56.2 Selection and application . 57.

21、 Smooth and corrugated sheaths . 67.1 Smooth-aluminum sheath 67.2 Corrugated-aluminum sheath. 78. Selection of sheath thickness . 78.1 Mechanical factors. 78.2 Grounding and relaying considerations . 78.3 Thickness constraints. 78.4 Functional design considerations. 109. Types of corrugation 119.1 G

22、eneral. 119.2 Helical corrugations. 119.3 Annular corrugations . 1210. Methods of manufacture 1310.1 Direct extrusion process. 1310.2 Seam welding. 1310.3 DIDD or the sinking process 1311. Parameters dictating bending radii. 1411.1 Bending during installation 14Authorized licensed use limited to: IH

23、S Stephanie Dejesus. Downloaded on June 16,2010 at 16:59:01 UTC from IEEE Xplore. Restrictions apply. viCopyright 2004 IEEE. All rights reserved.11.2 Curves with cable firmly anchored or embedded in position 1411.3 Expansion loops, offsets in manholes1411.4 Bending performance of aluminum sheaths 15

24、12. Fatigue characteristics of large-size corrugated-aluminum-sheathed cables installed in restricted manholes 1713. Installation practices in shafts 1713.1 Self-contained fluid-filled cables. 1713.2 Cables with extruded insulations . 1914. Guidelines for splicing and terminating (including pulling

25、eyes) . 1914.1 Impregnated-paper-insulated and self-contained fluid-filled cables 1914.2 Polymeric-insulated cables 2014.3 Pulling eyes 21Annex A (informative) Bibliography. 22Annex B (informative) Fatigue study of large-size helically corrugated aluminum-sheathed cables. 26Annex C (informative) Rec

26、ommended installation practices for hand wipe and cast plumb mold technique for sealing aluminum-sheathed cables . 27Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on June 16,2010 at 16:59:01 UTC from IEEE Xplore. Restrictions apply. Copyright 2004 IEEE. All rights reserved.1I

27、EEE Guide for Selection and Design of Aluminum Sheaths for Power Cables1. Overview1.1 Purpose The purpose of this guide is as follows:a) Outline requirements and establish design guidelines for the selection of aluminum sheaths for extrahigh-, high-, medium-, and low-voltage cablesb) Establish basic

28、 installation parameters for aluminum-sheathed cablesc) Provide references to industry standards and codes incorporating design and installation require-ments of aluminum-sheathed cablesd) Provide a comprehensive bibliography of literature related to the subject1.2 Scope This guide covers power cabl

29、es incorporating an aluminum sheath, except those of the SF6rigid-bus type.2. ReferencesThis guide shall be used in conjunction with the following publications. When the following specificationsare superseded by an approved revision, the revision shall apply. A specific IEC standard for continuously

30、welded or extruded aluminum sheaths had not been written at the time of publication of this guide.The cable or part of the cable may be in accordance with one or more of the references listed below. Theinstallation must be in accordance with the applicable electrical code or wiring regulations. Alum

31、inum Standards and Data, 2003, 12th Edition, The Aluminum Association, Inc.11This publication is available from The Aluminum Association, Inc., 900 19th Street NW, Washington DC 20006, USA (http:/www.aluminum.org).Authorized licensed use limited to: IHS Stephanie Dejesus. Downloaded on June 16,2010

32、at 16:59:01 UTC from IEEE Xplore. Restrictions apply. IEEEStd 635-2003 IEEE GUIDE FOR SELECTION AND DESIGN2Copyright 2004 IEEE. All rights reserved.CSA Std C22.1-2002, Canadian Electrical Code, Part I, 19th Edition, Safety Standard for ElectricalInstallations.2CSA Std C22.2, No. 123-1996 (R2001), Al

33、uminum Sheath Cables.ICEA P-45-482-1999, Short-Circuit Performance of Metallic Shields and Sheaths on Insulated Cable.3NFPA 70-2002, National Electrical Code(NEC).4UL 1569-1999, Metal-Clad Cables, Third Edition.53. Definitions3.1 aluminum sheath: An impervious aluminum or aluminum alloy tube, either

34、 smooth or corrugated,which is applied over a cable core to provide mechanical protection.3.2 extra high-voltage aluminum-sheathed power cable:Cable used in an electric system having amaximum phase-to-phase rms ac voltage above 242 000 V, the cable having an aluminum sheath as a majorcomponent in it

35、s construction.3.3 high-voltage aluminum-sheathed power cable:Cable used in an electric system having maximumphase-to-phase rms ac voltage above 72 500 V to 242 000 V, the cable having an aluminum sheath as amajor component in its construction.3.4 low-voltage aluminum-sheathed power cable:Cable used

36、 in an electric system having a maximumphase-to-phase rms ac voltage of 1000 V or less, the cable having an aluminum sheath as a major componentin its construction.3.5 medium-voltage aluminum-sheathed power cable:Cable used in an electric system having a maxi-mum phase-to-phase rms ac voltage above

37、1000 V to 72 500 V, the cable having an aluminum sheath as amajor component in its construction.4. Advantages and limitations of aluminum sheathsA cable designer or user should be aware of the merits and limitations of aluminum-sheathed cable andassign an order of importance to each property to sati

38、sfy the requirements of the specific application wherepower cables are involved.2CSA publications are available from the Canadian Standards Association (Standards Sales), 178 Rexdale Blvd., Etobicoke, Ontario,Canada M9W 1R3 (http:/www.csa.ca/).3ICEA publications are available from ICEA, P.O. Box 200

39、48, Minneapolis, MN 55420, USA (http:/www.icea.org/).4The NEC is published by the National Fire Protection Association, Batterymarch Park, Quincy, MA 02269, USA (http:/www.nfpa.org/). Copies are also available from the Institute of Electrical and Electronics Engineers, 445 Hoes Lane, P.O. Box 1331,P

40、iscataway, NJ 08855-1331, USA (http:/standards.ieee.org/).5UL standards are available from Global Engineering Documents, 15 Inverness Way East, Englewood, Colorado 80112, USA(http:/ licensed use limited to: IHS Stephanie Dejesus. Downloaded on June 16,2010 at 16:59:01 UTC from IEEE Xplore. Restricti

41、ons apply. IEEEOF ALUMINUM SHEATHS FOR POWER CABLES Std 635-2003Copyright 2004 IEEE. All rights reserved.34.1 Advantages4.1.1 Weight reductionThe use of an aluminum sheath reduces the weight of the cable compared with those having other metallicsheaths, thereby simplifying installation and lowering

42、shipping costs. Furthermore, longer pulling lengthsare possible with reduced cable weight.4.1.2 Electrical protectionAs a sheath, aluminum is characterized by high electrical conductance and consequently by high short-circuit capability. In addition, high conductance offers excellent protection agai

43、nst lightning.4.1.3 Fatigue resistanceAluminum has very good mechanical properties, for example, hardness and fatigue resistance. Therefore,the possibility of sheath fatigue failure due to vibrations and movement induced by thermal cycling isminimal.4.1.4 Mechanical protectionAluminum has a higher y

44、ield point, higher tensile strength, and less creep by comparison with other moreductile sheathing materials. These attributes permit fewer clamps for installations in tunnels or aboveground. The high hoop strength of aluminum sheath is particularly important in pressurized cables, since itmay permi

45、t a reduction in the number of stop joints and pressure tanks.4.2 Limitations4.2.1 Corrosion resistanceAluminum is a relatively active metal chemically, and care must be taken to provide adequate protectionagainst corrosion.4.2.2 Bend performanceBecause of its rigidity, smooth-aluminum-sheathed cabl

46、e is more difficult to bend than corrugated-aluminum-sheathed cable.4.2.3 Jointing and terminatingFor jointing and terminating, an aluminum sheath requires techniques different from those applicable toother commonly used metals, and retraining of splicing and terminating crews may be necessary.4.2.4

47、 Sheath lossesBecause of its high electrical conductance, losses resulting from induced sheath currents and eddy currentsare substantial. These losses can be reduced by selecting thinner sheaths and by using special sheath bondingmethods for single-conductor cables.Authorized licensed use limited to

48、 IHS Stephanie Dejesus. Downloaded on June 16,2010 at 16:59:01 UTC from IEEE Xplore. Restrictions apply. IEEEStd 635-2003 IEEE GUIDE FOR SELECTION AND DESIGN4Copyright 2004 IEEE. All rights reserved.5. Applications5.1 BackgroundIn the mid-1940s, attention was focused on aluminum as a sheathing mate

49、rial because of the scarcity of lead.As the technical and economic advantages of aluminum were recognized, its use escalated rapidly.Initially, aluminum was used in applications previously dominated by lead, namely, solid-type paper-insulated medium-voltage cables. The aluminum sheath was of the smooth type; a corrugated sheath was notused initially because of compound drainage into the corrugations. Subsequently, however, the corrugatedsheath found widespread acceptance, mainly in low-voltage extruded-dielectric cables and large-size flu