SANS 60794-3-11-2008 Optical fibre cables Part 3-11 Outdoor cables - Detailed specification for duct and directly buried single-mode optical fibre telecommunication cables《光缆 第3-11.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21613-9 SANS 60794-3-11:2008 Edition 1 IEC 60794-3-11:2007 Edition 1SOUTH AFRICAN NATIONAL STANDARD Optical fibre cables Part 3-11: Outdoo

4、r cables Detailed specification for duct and directly buried single-mode optical fibre telecommunication cables This national standard is the identical implementation of IEC 60794-3-11:2007 and is adopted with the permission of the International Electrotechnical Commission. Published by SABS Standar

5、ds Division 1 Dr Lategan Road Groenkloof Private Bag x191 Pretoria 0001 Tel: +27 12 428 7911 fax: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 60794-3-11:2008 Edition 1 IEC 60794-3-11:2007 Edition 1 T

6、able of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SABS SC 74A, Communication technology Fibre optics, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS docu

7、ment was published in August 2008. This standard may only be used and printed by approved subscription and freemailing clients of the SABS. IEC 60794-3-11 Edition 1.0 2007-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Optical fibre cables Part 3-11: Outdoor cables Detailed specification for duct an

8、d directly buried single-mode optical fibre telecommunication cables Cbles fibres optiques Partie 3-11: Cbles extrieurs Spcification particulire pour les cbles de tlcommunication fibres optiques unimodales destins tre installs dans des conduites ou tre directement enterrs INTERNATIONAL ELECTROTECHNI

9、CAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE U ICS 33.180.10 PRICE CODE CODE PRIX ISBN 2-8318-9255-4 SANS 60794-3-11:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 2 60794-3-11 IEC:2007 CONTENTS FOREWORD.4 1 Scope.6 2 Normati

10、ve references .6 3 Terms and definitions .7 4 Symbols .7 5 General information8 5.1 Overview.8 5.2 General cable description8 5.2.1 Characteristics of optical fibre .8 5.2.2 Characteristics of optical fibre cable elements .8 5.2.3 Characteristics of optical fibre cables 8 5.2.4 Environmental and pro

11、duct safety requirements 9 5.3 Optical fibre spliceability .9 5.4 Testing9 6 Requirements for cabled single-mode optical fibres10 6.1 Fibre materials 10 6.2 Optical requirements .10 6.2.1 Attenuation coefficient .10 6.2.2 Attenuation discontinuities.11 6.2.3 Cable cut-off wavelength .12 6.2.4 Polari

12、zation mode dispersion (PMD)12 6.2.5 Group index.12 7 Requirements for cable elements .12 7.1 Element design .12 7.1.1 Modularity .13 7.1.2 Fibre and element identification.13 7.2 Element characteristics .14 7.2.1 Ribbon.14 7.2.2 Tube kinking14 8 Requirements for optical cables14 8.1 Cable construct

13、ion 14 8.1.1 Cable core.15 8.1.2 Anti-buckling and strength element splicing .15 8.1.3 Cable element stranding15 8.1.4 Spliced fibres 15 8.1.5 Spare fibres.15 8.1.6 Cable sheath removal15 8.1.7 Armouring15 8.2 Marking .16 8.2.1 Sheath marking .16 8.2.2 Identification marking 16 8.2.3 Cable length ma

14、rking.16 8.3 Cable core materials .17 8.3.1 Tube filling compound material (if required).17 8.3.2 Water-blocking material.17 SANS 60794-3-11:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60794-3-11 IEC:2007 3 8.3.3 Cable material compatib

15、ility.17 8.3.4 Tube material 17 8.4 Cable sheath.17 8.4.1 Sheath material .17 8.4.2 Sheath thickness .17 8.4.3 Outer cable diameter .18 8.4.4 Moisture barrier .18 8.4.5 Rodent resistant barrier.18 8.5 Mechanical requirements.18 8.5.1 Cable bend18 8.5.2 Impact .19 8.5.3 Crush 19 8.5.4 Tensile perform

16、ance20 8.5.5 Torsion21 8.5.6 Repeated bending .21 8.6 Environmental requirements22 8.6.1 Temperature cycling 22 8.6.2 Stripping force stability of cabled optical fibres 23 8.6.3 Water penetration23 8.6.4 Environmental impact 23 8.7 Electrical protection.23 8.7.1 Continuity of metallic members23 8.7.

17、2 Lightning damage susceptibility.23 9 Quality assurance.23 Annex A (informative) Guidance for ITU-T and IEC cabled fibre and fibre references.24 Annex B (informative) Fibres26 Bibliography28 Figure 1 Definition of the different temperatures 22 Table 1 Attenuation coefficient.11 Table 2 Colour for i

18、ndividual fibres or units (listed alphabetically) 13 Table A.1 IEC and ITU cross-reference25 Table B.1 Dimensional attributes and measurement methods 26 Table B.2 Mechanical attributes and test methods .27 Table B.3 Transmission attributes and measurement methods.27 Table B.4 Environmental exposure

19、tests 27 Table B.5 Attributes measured.27 SANS 60794-3-11:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 4 60794-3-11 IEC:2007 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRE CABLES Part 3-11: Outdoor cables Detailed specificati

20、on for duct and directly buried single-mode optical fibre telecommunication cables FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to pr

21、omote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guide

22、s (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC a

23、lso participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as pos

24、sible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. W

25、hile all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertak

26、e to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to in

27、dicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents includi

28、ng individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or relianc

29、e upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elem

30、ents of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60794-3-11 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. The text of

31、this standard is based on the following documents: FDIS Report on voting 86A/1147/FDIS 86A/1165/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with ISO/IEC Directi

32、ves, Part 2. SANS 60794-3-11:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60794-3-11 IEC:2007 5 A list of all parts of the IEC 60794 series, published under the general title Optical fibre cables, can be found on the IEC website. This st

33、andard shall be used in conjunction with IEC 60794-3 and IEC 60794-3-10. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication

34、. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. SANS 60794-3-11:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 6 60794-3-11 IEC:2007 OPTICAL FIBRE CABLES Part 3-11: Outdoor cables

35、 Detailed specification for duct and directly buried single-mode optical fibre telecommunication cables 1 Scope This part of IEC 60794 sets forth technical requirements and characteristics of single-mode optical fibre cables for duct and direct buried installation. This specification includes functi

36、onal mechanical, environmental and optical requirements, recommended features and test methods for assessing the product against the stated requirements. The specified test methods, where applicable, are those referenced in IEC 60794-1-1 and described in detail in IEC 60794-1-2. The requirements of

37、this specification are used in conjunction with IEC 60794-3 and IEC 60794-3-10. Multimode fibre requirements are not addressed in this document; see IEC 60794-3-12 1) . 2 Normative references The following referenced documents are indispensable for the application of this document. For dated referen

38、ces, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC Guide 104, The preparation of safety publications and the use of basic safety publications and group safety publications IEC 60304, Standard colours for

39、insulation for low-frequency cables and wires IEC 60708, Low-frequency cables with polyolefin insulation and moisture barrier polyolefin sheath IEC 60793-1-22, Optical fibres Part 1-22: Measurement methods and test procedures Length measurement IEC 60793-1-40, Optical fibres Part 1-40: Measurement m

40、ethods and test procedures Attenuation _ 1)IEC 60794-3-12, Optical fibre cables - Part 3-12: Outdoor cables - Detailed specification for duct and directly buried optical telecommunication cables for use in premises cabling SANS 60794-3-11:2008This standard may only be used and printed by approved su

41、bscription and freemailing clients of the SABS.60794-3-11 IEC:2007 7 IEC 60793-1-44, Optical fibres Part 1-44: Measurement methods and test procedures Cut- off wavelength IEC 60793-1-48, Optical fibres Part 1-48: Measurement methods and test procedures Polarization mode dispersion IEC 60793-2-50, Op

42、tical fibres Part 2-50: Product specifications Sectional specification for single-mode class B fibres IEC 60794 (all parts), Optical fibre cables IEC 60794-1-1, Optical fibre cables Part 1-1: Generic specification General IEC 60794-1-2, Optical fibre cables Part 1-2: Generic specification Basic opti

43、cal cable test procedures IEC 60794-3, Optical fibre cables Part 3: Sectional specification Outdoor cables IEC 60794-3-10, Optical fibre cables Part 3-10: Outdoor cables Family specification for duct and directly buried optical telecommunication cables IEC 60811-1-1, Common test methods for insulati

44、ng and sheathing materials of electric cables and optical cables Part 1-1: Methods for general application Measurement of thickness and overall dimensions Tests for determining the mechanical properties IEC 62305 (all parts), Protection against lightning IEC/TR 61931, Fibre optic Terminology IEC/TR

45、62000, Single-mode fibre compatibility guidelines ITU-T G.652, Characteristics of a single-mode optical fibre and cable 3 Terms and definitions For the purposes of this document, unless otherwise specified, the terms and definitions given in IEC/TR 61931 apply. 4 Symbols The following symbols are us

46、ed in this document. cc cable cut-off wavelength d outer cable diameter SZ technique in which the lay reverses direction periodically SANS 60794-3-11:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 8 60794-3-11 IEC:2007 5 General informati

47、on 5.1 Overview Single-mode optical fibres are widely used for telecommunication purposes and are cabled to satisfy the functional requirements of the installation environment. Further, cables placed into ducts and sub-ducts may be installed using solely, or a combination of, pushing, pulling, and a

48、ir-assisted installation techniques. For duct installations, the environment and infrastructure can be varied and may also involve the use of single and multiple sub-ducts. Directly buried cables may be installed by a variety of methods such as ploughing and trenching with different environments and

49、 infrastructure. This may require specific cable design solutions based on multiple layers of armours and sheaths. It is recognised that certain designs of cable for direct buried applications involving such solutions may also be suitable for duct installation. The functional requirements and test methods featured in this specification are based upon adherence to established and recognised installation techniques suc