BS EN 60794-4-2003 光缆 第四部分：沿电力线的架空光缆.pdf

BRITISH STANDARD BS EN 60794-4:2003 Optical fibre cables Part 4: Sectional specification Aerial optical cables along electrical power lines The European Standard EN 60794-4:2003 has the status of a British Standard ICS 33.180.10 ? BS EN 60794-4:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 1 December 2003 BSI 1 December 2003 ISBN 0 580 42986 5 National foreword This British Standard is the official English language version of EN 60794-4:2003. It is identical with IEC 60794-4:2003. It supersedes BS EN 187200:2001 which is withdrawn. The UK participation in its preparation was entrusted 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. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its 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 international/European committee any enquiries 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 20, an inside back 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 EUROPEAN STANDARD EN 60794-4 NORME EUROPENNE EUROPISCHE NORM November 2003 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 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60794-4:2003 E ICS 33.180.10 Supersedes EN 187200:2001 English version Optical fibre cables Part 4: Sectional specification Aerial optical cables along electrical power lines (IEC 60794-4:2003) Cbles fibres optiques Partie 4: Spcification intermdiaire - Cbles optiques ariens le long des lignes lectriques de puissance (CEI 60794-4:2003) Lichtwellenleiterkabel Teil 4: Rahmenspezifikation - Lichtwellenleiter-Luftkabel auf Starkstrom-Freileitungen (IEC 60794-4:2003) This European Standard was approved by CENELEC on 2003-11-01. CENELEC members are bound to comply with 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 Central Secretariat 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 Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 86A/851/FDIS, future edition 1 of IEC 60794-4, 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 60794-4 on 2003-11-01. This European Standard supersedes EN 187200:2001. 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) 2004-08-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2006-11-01 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 Standard IEC 60794-4:2003 was approved by CENELEC as a European Standard without any modification. _ Page 2 EN 607944:2003 w w w . b z f x w . c o m 067-494 IE:C002 3 3 CONTENTS 1 Scope.5 2 Normative references .5 3 Definitions and abbreviations of cables.6 3.1 Definitions.6 3.2 Abbreviations of cables .6 4 Optical fibre.7 4.1 General.7 4.2 Attenuation.7 4.2.1 Attenuation coefficient .7 4.2.2 Attenuation uniformity.7 4.3 Cut-off wavelength of cabled fibre .7 4.4 Fibre colouring .7 4.5 Polarization mode dispersion (PMD).7 5 Cable element .8 5.1 Slotted core.8 5.2 Plastic tube .8 5.3 Ribbon .9 5.4 Metallic tube.9 5.4.1 Metallic tube on the optical core .9 5.4.2 Fibres directly located in a metallic tube .9 6 Optical fibre cable construction .9 6.1 General.9 6.2 Lay-up of the cable elements.10 6.3 Cable core filling .10 6.4 Strength members.10 6.4.1 OPGW, OPPC and MASS.10 6.4.2 ADSS and OPAC.11 6.5 Inner sheath.11 6.6 Outer sheath .11 6.7 Sheath marking .11 7 Main requirements for installation and operating conditions.11 7.1 General.11 7.2 Characterization of optical units for splicing purpose.11 8 Design characteristics .11 9 Optical fibre cable tests.12 9.1 Classification of tests .13 9.1.1 Type tests .13 9.1.2 Sample tests .13 9.1.3 Routine tests .13 9.2 Tensile performance.13 9.3 Stress-strain test on metallic cables .13 Page 3 EN 607944:2003 w w w . b z f x w . c o m 067-494 IE:C002 3 4 9.4 Installation capability.14 9.4.1 Sheave test .14 9.4.2 Repeated bending .14 9.4.3 Impact .14 9.4.4 Crush .14 9.4.5 Kink.14 9.4.6 Torsion.14 9.5 Temperature cycling.14 9.6 Short circuit.14 9.7 Lightning test .15 9.8 Ageing.15 9.8.1 Fibre coating compatibility.15 9.8.2 Finished cable .15 9.9 Hydrogen gas.15 9.10 Aeolian vibration .15 9.11 Creep.15 9.12 Fitting compatibility .15 9.13 Water penetration (for filled cables only) .15 9.14 Bleeding (for filled cables only) .16 9.15 Grease .16 9.16 Attenuation.16 9.17 Tracking and erosion resistance test on ADSS and OPAC.16 9.18 Weathering resistance test on ADSS and OPAC.16 9.19 Shotgun resistance test on ADSS and OPAC .16 9.20 Conductor access trolley for OPAC .16 10 Quality assurance.16 11 Packaging .16 Annex A (informative) Recommended methods of calculating rated tensile strength, cross-section of a layer of trapezoidal shaped wires, modulus of elasticity, linear expansion and d.c. resistance.17 Annex ZA (normative) Normative references to international publications with their corresponding European publications .19 Table 1 Design characteristics .12 Page 4 EN 607944:2003 w w w . b z f x w . c o m 067-494 IE:C002 3 5 OPTICAL FIBRE CABLES Part 4: Sectional specification Aerial optical cables along electrical power lines 1 Scope This part of IEC 60794 specifies the electrical, mechanical and optical requirements and test methods for aerial optical cables including OPGW (optical ground wire), OPPC (optical phase conductor), MASS (metallic aerial self-supported cable), ADSS (all-dielectric self-supporting cable) and OPAC (optical attached cable). 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 of the referenced document (including any amendments) applies. They complete the normative references already listed in the generic specification (IEC 60794-1-1, Clause 2, and IEC 60794-1-2, Clause 2) and in the sectional specification (IEC 60794-3, Clause 2). IEC 60104:1987, Aluminium-magnesium-silicon alloy wire for overhead line conductors IEC 60304:1982, Standard colours for insulation for low-frequency cables and wires IEC 60708-1:1981, Low-frequency cables with polyolefin insulation and moisture barrier polyolefin sheath Part 1: General design details and requirements IEC 60794-3:2001, Optical fibre cables Part 3: Sectional specification Outdoor cables IEC 60811-4-2:1990, Common test methods for insulating and sheathing materials of electric cables Part 4: Methods specific to polyethylene and polypropylene compounds Section Two: Elongation at break after pre-conditioning Wrapping test after pre-conditioning Wrapping test after thermal ageing in air Measurement of mass increase Long-term stability test (Appendix A) Test method for copper-catalysed oxidative degradation (Appendix B) IEC 60811-5-1:1990, Common test methods for insulating and sheathing materials of electric cables Part 5: Methods specific to filling compounds Section one: Drop point Separation of oil Lower temperature brittleness Total acid number Absence of corrosive components Permittivity at 23 C DC resistivity at 23 C and 100 C IEC 60888:1987, Zinc-coated steel wires for stranded conductors Page 5 EN 607944:2003 w w w . b z f x w . c o m 067-494 IE:C002 3 6 IEC 60889:1987, Hard-drawn aluminium wire for overhead line conductors IEC 61089:1991, Round wire concentric lay overhead electrical stranded conductors IEC 61232:1993, Aluminium-clad steel wires for electrical purposes IEC 61394:1997, Overhead lines Characteristics of greases for aluminium, aluminium alloy and steel bare conductors IEC 61395:1998, Overhead electrical conductors Creep test procedures for stranded conductors 3 Definitions and abbreviations of cables 3.1 Definitions For the purposes of this document, the following definitions and abbreviations of cables apply. 3.1.1 MAT maximum allowable tension maximum tensile load that may be applied to the cable without detriment to the tensile performance requirement (optical performance, fibre strain) 3.1.2 RTS rated tensile strength summation of the product of nominal cross-sectional area, minimum tensile strength and stranding factor for each load bearing material in the cable construction (refer to Annex A in the case of OPGW) 3.1.3 strain margin amount of strain the OCEPL can sustain without strain on the fibres due to the OCEPLs elongation 3.2 Abbreviations of cables ADSS all-dielectric self-supporting cable MASS metallic aerial self-supported cable which is not designed to have ground or phase capability OCEPL optical cable to be used along electrical power lines OPAC optical attached cable consisting of the following three attachment methods: wrapped: all-dielectric (wrap). Using special machinery, a lightweight flexible non-metallic cable can be wrapped helically around either the earth wire or the phase conductor. lashed: non-metallic cables that are installed longitudinally alongside the earth wire, the phase conductor or on a separate catenary (on a pole route) and are held in position with a binder or adhesive cord. Page 6 EN 607944:2003 w w w . b z f x w . c o m 067-494 IE:C002 3 7 preform attached: similar to the lashed cables except that the method of attachment involves the use of special preformed spiral attachment clips. OPGW optical ground wire. An OPGW has the dual performance functions of a conven- tional ground wire with telecommunication capabilities. OPPC optical phase conductor. An OPPC has the dual performance functions of a phase conductor with telecommunication capabilities. 4 Optical fibre 4.1 General Single-mode optical fibre which meets the requirements of IEC 60793-2 shall be used. Fibres other than those specified above can be used, if mutually agreed between the customer and the supplier. 4.2 Attenuation 4.2.1 Attenuation coefficient The typical maximum attenuation coefficient of a cable at 1 310 nm is 0,45 dB/km and/or at 1 550 nm it is 0,30 dB/km. Particular values shall be agreed between the customer and the supplier. The attenuation coefficient shall be measured in accordance with IEC 60793-1-40. 4.2.2 Attenuation uniformity 4.2.2.1 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 in accordance with IEC 60793-1-40. 4.2.2.2 Attenuation linearity The functional requirements are under consideration. 4.3 Cut-off wavelength of cabled fibre The cabled fibre cut-off wavelength cc shall be less than the operational wavelength. 4.4 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 shall 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 removable. 4.5 Polarization mode dispersion (PMD) Refer to 5.5 of IEC 60794-3. Page 7 EN 607944:2003 w w w . b z f x w . c o m 067-494 IE:C002 3 8 5 Cable element Generally, optical cables comprise several elements or individual constituents, depending on the cable design, which take into account the cable application, operating environment and manufacturing processes, and the need to protect the fibre during handling and cabling. The material(s) used for a cable element shall be selected to be compatible with the other elements in contact with it. An appropriate compatibility test method shall be defined in the family or product specification. Optical elements (cable elements containing optical fibres) and each fibre within a cable element shall be uniquely identified, for example, by colours, by a positional scheme, by markings or as specified in the product specification. Different types of optical elements are described below. 5.1 Slotted core The slotted core is either a metallic (for example, aluminium alloy) or non-metallic (for example, polyethylene or polypropylene) material with a defined number of slots, with longitudinal, helical or SZ configuration along the core. One or more primary coated fibres or optical element is located in each slot which shall be filled, if necessary, with a suitable water blocking system. If metallic, it shall be electrically bonded with the other metallic elements of the cable. If non- metallic, the slotted core usually contains a central element which shall be non-metallic. In this case, there shall be adequate adhesion between the central element and the extruded core in order to obtain the required temperature stability and