1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationOptical fibre cablesPart 4-20: Aerial optical cables along electrical power lines Family specification for ADSS (All Dielectric Self Supported) optical cablesBS EN 60794-4-20:201
2、2National forewordThis British Standard is the UK implementation of EN 60794-4-20:2012. It is identical to IEC 60794-4-20:2012.The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/1, Optical fibres and cables.A list of organization
3、s represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013.Published by BSI Standards Limited 2013.ISBN
4、978 0 580 70839 8 ICS 33.180.10 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2013.Amendments issued since publicationAmd. No. Date Text affectedBRI
5、TISH STANDARDBS EN 60794-4-20:2012EUROPEAN STANDARD EN 60794-4-20 NORME EUROPENNE EUROPISCHE NORM December 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue M
6、arnix 17, B - 1000 Brussels 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60794-4-20:2012 E ICS 33.180.10 English version Optical fibre cables - Part 4-20: Aerial optical cables along electrical power lines - Family specifi
7、cation for ADSS (All Dielectric Self Supported) optical cables (IEC 60794-4-20:2012) Cbles fibres optiques - Partie 4-20: Cbles optiques ariens installs le long des lignes dnergie lectrique - Spcification de famille pour les cbles optiques autoports par le dilectrique (ADSS) (CEI 60794-4-20:2012) Li
8、chtwellenleiterkabel - Teil 4-20: Lichtwellenleiter-Luftkabel auf Starkstrom-Freileitungen - Familienspezifikation fr ADSS-LWL-Kabel (dielektrische, selbsttragende LWL-Kabel) (IEC 60794-4-20:2012) This European Standard was approved by CENELEC on 2012-11-29. CENELEC members are bound to comply with
9、the CEN/CENELEC Internal Regulations which stipulate the conditions 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 CEN-CENELEC Managem
10、ent Centre or to any CENELEC member. This European Standard exists in three 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 CEN-CENELEC Management Centre has the sa
11、me status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Li
12、thuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 60794-4-20:2012EN 60794-4-20:2012 Foreword The text of document 86A/1467/FDIS, future edition 1 of IEC 60794-4-20, prepared by SC 86A “
13、Fibresand cables“ of IEC/TC 86 “Fibre optics“ was submitted to the IEC-CENELEC parallel vote andapproved by CENELEC as EN 60794-4-20:2012. The following dates are fixed: latest date by which the document has to be implemented at national level bypublication of an identical nationalstandard or by end
14、orsement (dop) 2013-08-29 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2015-11-29 Attention is drawn to the possibility that some of the elements of this document may be the subject ofpatent rights. CENELEC and/or CEN shall not be held responsi
15、ble for identifying any or all suchpatent rights. Endorsement notice The text of the International Standard IEC 60794-4-20:2012 was approved by CENELEC as aEuropean Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards in
16、dicated: IEC 60060-1:2010 NOTE Harmonised as EN 60060-1:2010 (not modified). IEC 60794 Series NOTE Harmonised as 60794 Series (not modified). IEC 60794-1-2X Series NOTE Harmonised as EN 60794-1-2X Series (not modified).IEC 60794-3 NOTE Harmonised as EN 60794-3. ISO 9001 NOTE Harmonised as EN ISO 900
17、1. BS EN 60794-4-20:2012EN 60794-4-20:2012 Annex ZA (normative) Normative references to international publicationswith their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and areindispensable for its application. For dat
18、ed references, only the edition cited applies. For undatedreferences, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HDapplies. Publication Year Ti
19、tle EN/HD Year IEC 60304 - Standard colours for insulation for low-frequency cables and wires HD 402 S2 - IEC 60793-1-40 - Optical fibres - Part 1-40: Measurement methods and test procedures - Attenuation EN 60793-1-40 - IEC 60793-1-44 - Optical fibres - Part 1-44: Measurement methods and test proce
20、dures - Cut-off wavelength EN 60793-1-44 - IEC 60793-1-48 - Optical fibres - Part 1-48: Measurement methods and test procedures - Polarization mode dispersion EN 60793-1-48 - IEC 60793-2-50 - Optical fibres - Part 2-50: Product specifications - Sectional specification for class B single-mode fibres
21、EN 60793-2-50 - IEC 60794-1-1 - Optical fibre cables - Part 1-1: Generic specification - General EN 60794-1-1 - IEC 60794-1-2 - Optical fibre cables - Part 1-2: Generic specification - Basic optical cable test procedures EN 60794-1-2 - IEC 60794-1-22 - Optical fibre cables - Part 1-22: Generic speci
22、fication - Basic optical cable test procedures - Environmental test methods EN 60794-1-22 - IEC 60794-1-23 - Optical fibre cables - Part 1-23: Generic specification - Basic optical cable test procedures - Cable element test methods EN 60794-1-23 - IEC 60794-4 - Optical fibre cables - Part 4: Section
23、al specification - Aerial opticalcables along electrical power lines EN 60794-4 - IEC 61395 - Overhead electrical conductors - Creep testprocedures for stranded conductors EN 61395 - BS EN 60794-4-20:201260794-4-20 IEC:2012(E) CONTENTS 1 Scope . . 6 2 Normative references . 6 3 Terms, definitions an
24、d abbreviations . 7 4 Optical fibres 9 General . 9 4.1Attenuation . 9 4.2Attenuation coefficient . . 9 4.2.1Attenuation discontinuities 9 4.2.2 Cut-off wavelength of cabled fibre 9 4.3Fibre colouring . . 9 4.4Polarisation mode dispersion (PMD) . . 9 4.55 Cable elements . 9 6 Optical fibre cable cons
25、tructions . 10 General . . 10 6.1Optical unit . 10 6.2Cable protection elements . 10 6.37 Main requirements for installation and operating conditions . 11 8 Cable design considerations 11 9 Cable tests . 12 General . . 12 9.1Classification of tests . 12 9.2Type tests . 12 9.2.1Factory acceptance tes
26、ts 13 9.2.2Routine tests 13 9.2.3 Tensile performance . 13 9.3General . 13 9.3.1Maximum allowed tension (MAT) . . 13 9.3.2 Installation capability 13 9.4General . 13 9.4.1Sheave test . . 13 9.4.2Repeated bending . 14 9.4.3Impact . 14 9.4.4Crush . . 15 9.4.5Kink 15 9.4.6Torsion 15 9.4.7 Vibration tes
27、ting 16 9.5Aeolian vibration test . . 16 9.5.1Low frequency vibration test (galloping test) . 16 9.5.2 Temperature cycling . 17 9.6Water penetration 18 9.7Weathering resistance 18 9.8BS EN 60794-4-20:201260794-4-20 IEC:2012(E) Tracking and erosion resistance test . 18 9.9Creep behaviour 19 9.10Fitti
28、ng compatibility . . 19 9.11 10 Factory acceptance tests . 19 11 Routine tests 19 12 Quality assurance 20 Annex A (informative) Packaging and marking . 21 Annex B (informative) Installation considerations for ADSS cables. 22 Annex C (informative) Electrical test (TRACKING) . . 23 Annex D (informativ
29、e) All Dielectric Self-Supported (ADSS) cables to be used in overhead power lines (Blank detail specification) 31 Bibliography . 33 Figure C.1 Draft of test equipment . 25 Figure C.2 Test chamber . 25 Figure C.3 Electric scheme for the test . 27 Figure C.4 Details of the sample . . 27 Figure C.5 Noz
30、zle . 28 Figure C.6 Details for the spraying . 29 Figure C.7 Pollution model . 30 Figure C.8 Basic circuit for arcing test. 30 Table 1 Cable design characteristics 11 Table 2 Optional parameters (if required by customer) . 12 Table C.1 Reqand Ceqvalues for different pollution index values 29 Table D
31、.1 Blank detail specification . 31 BS EN 60794-4-20:2012 6 60794-4-20 IEC:2012(E) OPTICAL FIBRE CABLES Part 4-20: Aerial optical cables along electrical power lines Family specification for ADSS (All Dielectric Self Supported) optical cables 1 Scope This part of IEC 60794, which is a family specific
32、ation, covers optical telecommunication cables, commonly with single-mode fibres to be used primarily in overhead power lines applications. The cable may also be used in other overhead utility networks, such as for telephony or TV services. Requirements of the sectional specification IEC 60794-4 for
33、 aerial optical cables along electrical power lines are applicable to cables covered by this standard. NOTE In some particular situations in the electrical industry, short overhead links can be also designed with multimode fibres. The ADSS cable consists of single-mode optical fibres contained in on
34、e or more protective dielectric fibre optic units surrounded by or attached to suitable dielectric strength members and sheaths. The cable does not contain metallic components. An ADSS cable is designed to meet the optical and mechanical requirements under different types of installation, operating
35、and environmental conditions and loading, as described in Annex B. This standard covers the construction, mechanical, electrical, and optical performance, installation guidelines, acceptance criteria, test requirements, environmental considerations, and accessories compatibility for an all dielectri
36、c, self-supporting fibre optic (ADSS) cable. The standard provides both construction and performance requirements that ensure, within the guidelines of this standard, that the mechanical capabilities of the cable components and maintenance of optical fibre integrity and optical transmissions are pro
37、per. This standard excludes any “lashed” or “wrapped” OPAC cables. Cables intended for installation in conformity with ISO/IEC 24702 and related standards may require the specification of additional tests to ensure their suitability in the applicable environments defined by the mechanical, ingress,
38、climatic and chemical, and electromagnetic (MICE) classification. These tests are outside of the scope of IEC 60794 cable specifications, and MICE criteria are not part of the requirements for IEC 60794 specifications. The MICE tests may be the same as, similar to, or substantially different from, t
39、he tests required by IEC 60794 specifications. Cables manufactured per IEC 60794 specifications may or may not meet the MICE criteria. For supplemental discussion, see IEC/TR 62362. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and a
40、re indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60304, Standard colours for insulation for low-frequency cables and wires IEC 60793-1-40, Optical
41、fibres Part 1-40: Measurement methods and test procedures Attenuation BS EN 60794-4-20:201260794-4-20 IEC:2012(E) 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 P
42、olarization mode dispersion IEC 60793-2-50, Optical fibres Part 2-50: Product specifications Sectional specification for class B single-mode fibres IEC 60794-1-1, Optical fibre cables Part 1: Generic specification General IEC 60794-1-2, Optical fibre cables Part 1-2: Generic specification Basic opti
43、cal cable test procedures 1, 2IEC 60794-1-22, Optical fibre cables Part 1-22: Generic specification Basic optical cable test procedures Environmental test methods IEC 60794-1-23, Optical fibre cables Part 1-23: Generic specification Basic optical cable test procedures Cable element test methods IEC
44、60794-4, Optical fibre cables Part 4: Sectional Specification Aerial optical cables along electrical power lines IEC 61395, Overhead electrical conductors Creep test procedures for stranded conductors 3 Terms, definitions and abbreviations For the purposes of this document, the terms and definitions
45、 given in IEC 60794-1-1 and IEC 60794-4, as well as the following, apply. 3.1maximum allowable tension MAT maximum tensile load that may be applied to the cable without detriment to the performance requirements (optical performance, fibre durability) due to fibre strain Note 1 to entry: Due to insta
46、llation codes the MAT value is sometimes restricted to be less than 60 % of the breaking tension of the cable. 3.2maximum operation tension MOT tensile load that can be applied to the cable either permanently or for a long term without producing any strain to the fibres Note 1 to entry: This conditi
47、on should correspond to the tension with no ice and no gale wind at average mean temperatures throughout the year, assumed to be between 16 C and 20 C. 3.3zero strain margin tensile load that the cable can sustain without strain on fibres due to cable elongation _ 1This document has been withdrawn,
48、but can still be purchased, if necessary. Until IEC 60794-1-21 will be available, the tests stated in Clause 9 have to be taken from IEC 60794-1-2. 2This standard will be replaced by IEC 60794-1-21, Optical fibre cables Part 1-21: Generic specification Basic optical cable test procedures Mechanical
49、test methods (see also Bibliography), as soon as it will be available. BS EN 60794-4-20:2012 8 60794-4-20 IEC:2012(E) 3.4breaking tension tensile load that will produce physical rupture of the cable Note 1 to entry: There is no optical consideration related to this parameter. Note 2 to entry: The breaking tension should be calculated. The design model shall be validated; the cables do not need to be tested. 3.5maximum installation tensio
