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1、BRITISH STANDARD BS EN 60794-3:2002 IEC 60794-3:2001 Optical fibre cables Part 3: Sectional specification Outdoor cables The European Standard EN 60794-3:2002 has the status of a British Standard ICS 33.180.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: shef
2、fieldun sheffieldun, na, Mon Nov 13 03:02:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60794-3:2002 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strat
3、egy Committee on 9 May 2002 BSI 9 May 2002 ISBN 0 580 39596 0 National foreword This British Standard is the official English language version of EN 60794-3:2002. It is identical with IEC 60794-3:2001. It supersedes BS EN 60794-3:1998 which is withdrawn. The UK participation in its preparation was e
4、ntrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/1, Optical fibres and cables, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number
5、60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international o
6、r European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all th
7、e necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquir
8、ies on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 31, an inside ba
9、ck cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 03:02:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STAN
10、DARDEN 60794-3 NORME EUROPENNE EUROPISCHE NORMMarch 2002 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC -All right
11、s of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60794-3:2002 E ICS 33.180.10Supersedes EN 60794-3:1998 English version Optical fibre cables Part 3: Sectional specification Outdoor cables (IEC 60794-3:2001) Cbles fibres optiques Partie 3: Spcificatio
12、n intermdiaire - Cbles extrieurs (CEI 60794-3:2001) Lichtwellenleiterkabel Teil 3: Rahmenspezifikation Auenkabel (IEC 60794-3:2001) This European Standard was approved by CENELEC on 2002-03-05. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditio
13、ns for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three
14、 official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical
15、 committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 03:02:19 GMT+00:00 2006, Uncont
16、rolled Copy, (c) BSI Foreword The text of document 86A/684/FDIS, future edition 3 of IEC 60794-3, prepared by SC 86A, Fibres and cables, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60794-3 on 2002-03-05. This European Standard supersed
17、es EN 60794-3:1998. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 2002-12-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow) 200
18、5-03-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annex ZA is normative and annex A is informative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Sta
19、ndard IEC 60794-3:2001 was approved by CENELEC as a European Standard without any modification. _ Page 2 EN 607943:2002 BSI 9 May 2002 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 03:02:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CONTENTS 1Scope.5 2Normative references .5 3Terms and defi
20、nitions .6 4Symbols and abbreviations.7 5Optical fibre7 5.1General.7 5.2Attenuation7 5.2.1Attenuation coefficient .7 5.2.2Attenuation uniformity Attenuation discontinuities .7 5.3Cut-off wavelength 7 5.4Fibre colouring 7 5.5Polarisation mode dispersion (PMD)7 5.6Jumper cable cut-off wavelength .8 6C
21、able element 8 6.1Tight secondary coating or buffer 9 6.2Ruggedized fibre .9 6.3Slotted core.9 6.4Tube9 6.5Ribbon 9 7Optical fibre cable construction.10 7.1General.10 7.2Lay-up of the cable elements.11 7.3Cable core filling .11 7.4Strength member.12 7.5Moisture barrier.12 7.6Cable sheath and armouri
22、ng12 7.6.1Inner sheath 12 7.6.2Armouring13 7.6.3Outer sheath .13 7.6.4Outer protection of cables for lake and river crossings.13 7.7Sheath marking .13 7.8Hydrogen gas13 8Installation and operating conditions.13 8.1General.13 8.2Characterisation of cable elements for splicing purposes.14 8.2.1General
23、 purpose tests .14 8.2.2Tests applicable to tubes.14 8.2.3Tests applicable to ribbons14 Page 3 EN 607943:2002 BSI 9 May 2002 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 03:02:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 9Optical fibre cable tests17 9.1Tensile performance17 9.2Installatio
24、n capability.17 9.2.1Bending under tension.17 9.2.2Repeated bending .17 9.2.3Impact .17 9.2.4Kink.17 9.2.5Torsion17 9.2.6Hydrostatic pressure17 9.2.7Coiling performance 18 9.2.8Sheath abrasion resistance .18 9.3Cable bend18 9.4Crush 18 9.5Temperature cycling18 9.6Ageing.18 9.6.1Fibre coating compati
25、bility .18 9.6.2Finished cable .18 9.7Water penetration (for filled cables only) .18 9.8Pneumatic resistance (for unfilled cables only)19 9.9Lightning (for cables containing metallic elements)19 9.10 Special aerial installation conditions19 9.10.1 Aeolian vibration19 9.10.2 Shotgun resistance19 10Qu
26、ality assurance.19 Annex A (informative) Guide to the statistical specification of polarisation mode dispersion of optical fibre cables.20 A.1Introductory remarks20 A.2Apparatus21 A.3Test sample.21 A.4Test procedure 21 A.5Calculations.21 A.5.1Concatenation of individual cable sections .21 A.5.2Metho
27、d 1: PMD design value22 A.5.3Method 2: Maximum DGD.25 A.5.4Relation between method 1 link PMD and digital system performance27 A.6Results 28 A.6.1Information to be provided with each test .28 A.6.2Information to be provided upon request.28 A.7Reference documents29 Annex ZA (normative) Normative refe
28、rneces to international publications with their corresponding European publications 30 Figure 1 Cross-section of a typical edge-bonded ribbon.10 Figure 2 Cross-section of a typical encapsulated ribbon.10 Figure 3 Cross-sectional drawing illustrating fibre ribbon geometry15 Figure A.1 Equivalence env
29、elopes using gamma .27 Table 1 Maximum dimensions of optical fibre ribbons.15 Page 4 EN 607943:2002 BSI 9 May 2002 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 03:02:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 60794-3 IEC:2001 5 OPTICAL FIBRE CABLES Part 3: Sectional specification Outdoo
30、r cables 1 Scope This part of IEC 60794 specifies the requirements of single-mode optical fibre cables and cable elements which are intended to be used primarily in public telecommunications networks. Other types of applications requiring similar types of cables can be considered. Requirements for c
31、ables to be used in ducts, for directly buried application, aerial cables and cables for lake and river crossings are included in this standard. For aerial application, this standard does not cover all functional aspects of cables installed in the vicinity of overhead power lines. In the case of suc
32、h application, additional requirements and test methods may be necessary. Moreover, this standard excludes optical ground wires and cables attached to the phase or earth conductors of overhead power lines. For cables for lake and river crossings, this standard does not cover methods of cable repair,
33、 nor repair capability, nor does it cover cables for use with underwater line amplifiers. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition
34、 of the referenced document (including any amendments) applies. IEC 60189 (all parts), Low-frequency cables and wires with PVC insulation and PVC sheath IEC 60304:1982, Standard colours for insulation for low-frequency cables and wires IEC 60708-1:1981, Low-frequency cables with polyolefin insulatio
35、n and moisture barrier polyolefin sheath Part 1: General design details and requirements IEC 60793 (all parts), Optical fibres IEC 60793-1-21:2001, Optical fibres Part 1-21: Measurement and test procedures Coating geometry measuring methods IEC 60793-1-32:2001, Optical fibres Part 1-32: Measurement
36、and test procedures Coating strippability IEC 60793-1-40:2001, Optical fibres Part 1-40: Attenuation measurement methods IEC 60793-1-44:2001, Optical fibres Part 1-44: Cut-off wavelength measurement methods Page 5 EN 607943:2002 BSI 9 May 2002 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 0
37、3:02:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 60794-3 IEC:2001 6 IEC 60793-2:1998, Optical fibres Part 2: Product specifications IEC 60794-1-1:1999, Optical fibre cables Part 1-1: Generic specification General IEC 60794-1-2:1999, Optical fibre cables Part 1-2: Generic specification Basic optica
38、l cable test procedures IEC 60811-5-1:1990, Common test methods for insulating and sheathing materials of electric cables Part 5: Methods specific to filling compounds Section 1: Drop point Separation of oil Lower temperature brittleness Total acid number Absence of corrosive components Permittivity
39、 at 23 C DC resistivity at 23 C and 100 C IEC/TR 61282-3:2001, Guidelines for the calculation of PMD in fibre optic systems IEC/TS 61941:2000, Optical fibres Polarization mode dispersion measurement techniques for single-mode optical fibres ITU-T Recommendation K.25:2000, Protection of optical fibre
40、 cables 3 Terms and definitions For the purpose of this part of IEC 60794, the following terms and definitions apply. 3.1 differential group delay, ps DGD relative time delay between the two fundamental polarisation modes (principal states of polarisation) at the end of an optical fibre cable, at a
41、particular time and wavelength 3.2 polarisation mode dispersion value, ps PMD value average of DGD values across wavelengths 3.3 polarisation mode dispersion coefficient, ps/?km PMD coefficient PMD value of an optical fibre cable divided by the square root of its length (km) 3.4 cable section indivi
42、dual reel of cable, as produced 3.5 link length of cable composed of a number of individual cable sections NOTE Link PMD values are generally calculated according to the formulas in this standard but may be measured. Page 6 EN 607943:2002 BSI 9 May 2002 Licensed Copy: sheffieldun sheffieldun, na, Mo
43、n Nov 13 03:02:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 60794-3 IEC:2001 7 4 Symbols and abbreviations ?ccCabled fibre cut-off wavelength SZTechnique in which the lay reverses direction periodically 5 Optical fibre 5.1 General Single-mode optical fibre which meets the requirements of IEC 60793-
44、2 shall be used. 5.2 Attenuation 5.2.1 Attenuation coefficient The typical maximum attenuation coefficient of a cable is dependent on the fibre type(s) used. Typical values are shown in 5.1 of IEC 60794-1-1. Particular values shall be agreed between the user and the manufacturer. The attenuation coe
45、fficient shall be measured in accordance with method A, B or C of IEC 60793-1-40. 5.2.2 Attenuation uniformity Attenuation discontinuities The local attenuation shall not have point discontinuities in excess of 0,10 dB. The test method best suited to provide the functional requirements is under cons
46、ideration. 5.3 Cut-off wavelength The cabled fibre cut-off wavelength, ?cc, shall be less than the operational wavelength. 5.4 Fibre colouring If the primary coated fibres are coloured for identification, the coloured coating shall be readily identifiable throughout the lifetime of the cable and sha
47、ll be a reasonable match to IEC 60304. If required, the colouring shall permit sufficient light to be transmitted through the primary coating to allow local light injection and detection. Alternatively, the colour may be removed for this application. 5.5 Polarisation mode dispersion (PMD) Cabled fib
48、re PMD shall be specified/characterised on a statistical basis, not on an individual fibre basis, as described in annex A. Measurements on individual cabled fibres may be performed by any of the PMD measurement methods recognised by the IEC. Measurements on uncabled fibre can be used to generate cab
49、led fibre statistics when the design and processes are stable and the relationship between the PMD coefficients of uncabled and cabled fibre are known. The following requirements pertain only to the aspect of the link calculated from cable information. To combine this information with other parts of the link, such as components and optical amplifiers, reference should be made to IEC 61282-3. Page 7 EN 607943:2002 BSI 9 May 2002 Licensed Copy: sheffie