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. ICS 33.180.10 ISBN 0-626-15528-2 SANS 60794-4:2004 Edition 1 IEC 60794-4:2003 Edition 1 SOUTH AFRICAN NATIONAL STANDARD Optical fibre cables Part 4: Sect
4、ional specification Aerial optical cables along electrical power lines This national standard is the identical implementation of IEC 60794-4:2003 and is adopted with the permission of the International Electrotechnical Commission. Published by Standards South Africa 1 dr lategan road groenkloof priv
5、ate bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 60794-4:2004 Edition 1 IEC 60794-4:2003 Edition 1 Table of changes Change No. Date Scope Abstract Specifies the electrical, mechanical and optical requirements and t
6、est 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). Keywords ADSS, aerial cables, MASS, OPAC, OPGW, OPPC, optical cables
7、. National foreword This South African standard was approved by National Committee StanSA SC 74A, Communication technology Fibre optics, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. NORMEINTERNATIONALECEIIECINTERNATIONALSTANDARD60794-4
8、Premire ditionFirst edition2003-06Cbles fibres optiques Partie 4:Spcification intermdiaire Cbles optiques ariens le longdes lignes lectriques de puissanceOptical fibre cables Part 4:Sectional specification Aerial optical cables alongelectrical power linesPour prix, voir catalogue en vigueurFor price
9、, see current catalogue IEC 2003 Droits de reproduction rservs Copyright - all rights reservedAucune partie de cette publication ne peut tre reproduite niutilise sous quelque forme que ce soit et par aucun procd,lectronique ou mcanique, y compris la photocopie et lesmicrofilms, sans laccord crit de
10、lditeur.No part of this publication may be reproduced or utilized in anyform or by any means, electronic or mechanical, includingphotocopying and microfilm, without permission in writing fromthe publisher.International Electrotechnical Commission, 3, rue de Varemb, PO Box 131, CH-1211 Geneva 20, Swi
11、tzerlandTelephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.chCODE PRIXPRICE CODE RCommission Electrotechnique InternationaleInternational Electrotechnical Commission 60794-4 IEC:2003 3 CONTENTSFOREWORD 71 Scope 112 Normative references. 113 Definitions and abbrev
12、iations of cables 133.1 Definitions 133.2 Abbreviations of cables. 134 Optical fibre. 154.1 General 154.2 Attenuation . 154.2.1 Attenuation coefficient 154.2.2 Attenuation uniformity . 154.3 Cut-off wavelength of cabled fibre. 154.4 Fibre colouring 154.5 Polarization mode dispersion (PMD) . 155 Cabl
13、e element . 175.1 Slotted core 175.2 Plastic tube. 175.3 Ribbon 195.4 Metallic tube . 195.4.1 Metallic tube on the optical core 195.4.2 Fibres directly located in a metallic tube . 196 Optical fibre cable construction 196.1 General 196.2 Lay-up of the cable elements 216.3 Cable core filling. 216.4 S
14、trength members 216.4.1 OPGW, OPPC and MASS . 216.4.2 ADSS and OPAC 236.5 Inner sheath . 236.6 Outer sheath. 236.7 Sheath marking 237 Main requirements for installation and operating conditions . 237.1 General 237.2 Characterization of optical units for splicing purpose 238 Design characteristics 23
15、9 Optical fibre cable tests . 259.1 Classification of tests 279.1.1 Type tests. 279.1.2 Sample tests. 279.1.3 Routine tests 279.2 Tensile performance . 279.3 Stress-strain test on metallic cables 2760794-4 IEC:2003 5 9.4 Installation capability 299.4.1 Sheave test 299.4.2 Repeated bending. 299.4.3 I
16、mpact 299.4.4 Crush 299.4.5 Kink 299.4.6 Torsion . 299.5 Temperature cycling . 299.6 Short circuit 299.7 Lightning test 319.8 Ageing 319.8.1 Fibre coating compatibility 319.8.2 Finished cable 319.9 Hydrogen gas . 319.10 Aeolian vibration. 319.11 Creep . 319.12 Fitting compatibility. 319.13 Water pen
17、etration (for filled cables only). 319.14 Bleeding (for filled cables only). 339.15 Grease . 339.16 Attenuation . 339.17 Tracking and erosion resistance test on ADSS and OPAC 339.18 Weathering resistance test on ADSS and OPAC. 339.19 Shotgun resistance test on ADSS and OPAC 339.20 Conductor access t
18、rolley for OPAC. 3310 Quality assurance 3311 Packaging 33Annex A (informative) Recommended methods of calculating rated tensile strength,cross-section of a layer of trapezoidal shaped wires, modulus of elasticity, linearexpansion and d.c. resistance 35Table 1 Design characteristics .2560794-4 IEC:20
19、03 7 INTERNATIONAL ELECTROTECHNICAL COMMISSION_OPTICAL FIBRE CABLES Part 4: Sectional specification Aerial optical cables along electrical power linesFOREWORD1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprisingall national electrotechnical
20、 committees (IEC National Committees). The object of the IEC is to promoteinternational co-operation on all questions concerning standardization in the electrical and electronic fields. Tothis end and in addition to other activities, the IEC publishes International Standards. Their preparation isent
21、rusted to technical committees; any IEC National Committee interested in the subject dealt with mayparticipate in this preparatory work. International, governmental and non-governmental organizations liaisingwith the IEC also participate in this preparation. The IEC collaborates closely with the Int
22、ernationalOrganization for Standardization (ISO) in accordance with conditions determined by agreement between thetwo organizations.2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, aninternational consensus of opinion on the relevant subjects sinc
23、e each technical committee has representationfrom all interested National Committees.3) The documents produced have the form of recommendations for international use and are published in the formof standards, technical specifications, technical reports or guides and they are accepted by the National
24、Committees in that sense.4) In order to promote international unification, IEC National Committees undertake to apply IEC InternationalStandards transparently to the maximum extent possible in their national and regional standards. Anydivergence between the IEC Standard and the corresponding nationa
25、l or regional standard shall be clearlyindicated in the latter.5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for anyequipment declared to be in conformity with one of its standards.6) Attention is drawn to the possibility that some of the elemen
26、ts of this International Standard may be the subjectof patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.International Standard IEC 60794-4 has been prepared by subcommittee 86A: Fibres andcables, of IEC technical committee 86: Fibre optics.The text o
27、f this standard is based on the following documents:FDIS Report on voting86A/851/FDIS 86A/859/RVDFull information on the voting for the approval of this standard can be found in the report onvoting indicated in the above table.This publication has been drafted in accordance with the ISO/IEC Directiv
28、es, Part 2.60794-4 IEC:2003 9 IEC 60794 consists of the following parts under the general title Optical fibre cables Part 1-1: Generic specification General Part 1-2: Generic specification Basic optical cable test procedures Part 2: Sectional specification Indoor cables Part 3: Sectional specificati
29、on Outdoor cables Part 4: Sectional specification Aerial optical cables along electrical power lineThe committee has decided that the contents of this publication will remain unchanged untilApril 2007. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or am
30、ended.60794-4 IEC:2003 11 OPTICAL FIBRE CABLES Part 4: Sectional specification Aerial optical cables along electrical power lines1 ScopeThis part of IEC 60794 specifies the electrical, mechanical and optical requirements and testmethods for aerial optical cables including OPGW (optical ground wire),
31、 OPPC (optical phaseconductor), MASS (metallic aerial self-supported cable), ADSS (all-dielectric self-supportingcable) and OPAC (optical attached cable).2 Normative referencesThe following referenced documents are indispensable for the application of this document.For dated references, only the edi
32、tion cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.They complete the normative references already listed in the generic specification (IEC60794-1-1, Clause 2, and IEC 60794-1-2, Clause 2) and in the sectional specification (IEC
33、60794-3, Clause 2).IEC 60104:1987, Aluminium-magnesium-silicon alloy wire for overhead line conductorsIEC 60304:1982, Standard colours for insulation for low-frequency cables and wiresIEC 60708-1:1981, Low-frequency cables with polyolefin insulation and moisture barrierpolyolefin sheath Part 1: Gene
34、ral design details and requirementsIEC 60794-3:2001, Optical fibre cables Part 3: Sectional specification Outdoor cablesIEC 60811-4-2:1990, Common test methods for insulating and sheathing materials of electriccables Part 4: Methods specific to polyethylene and polypropylene compounds SectionTwo: El
35、ongation at break after pre-conditioning Wrapping test after pre-conditioning Wrapping test after thermal ageing in air Measurement of mass increase Long-termstability test (Appendix A) Test method for copper-catalysed oxidative degradation(Appendix B)IEC 60811-5-1:1990, Common test methods for insu
36、lating and sheathing materials of electriccables Part 5: Methods specific to filling compounds Section one: Drop point Separationof oil Lower temperature brittleness Total acid number Absence of corrosivecomponents Permittivity at 23 C DC resistivity at 23 C and 100 CIEC 60888:1987, Zinc-coated stee
37、l wires for stranded conductors60794-4 IEC:2003 13 IEC 60889:1987, Hard-drawn aluminium wire for overhead line conductorsIEC 61089:1991, Round wire concentric lay overhead electrical stranded conductorsIEC 61232:1993, Aluminium-clad steel wires for electrical purposesIEC 61394:1997, Overhead lines C
38、haracteristics of greases for aluminium, aluminium alloyand steel bare conductorsIEC 61395:1998, Overhead electrical conductors Creep test procedures for strandedconductors3 Definitions and abbreviations of cables3.1 DefinitionsFor the purposes of this document, the following definitions and abbrevi
39、ations of cables apply.3.1.1MATmaximum allowable tensionmaximum tensile load that may be applied to the cable without detriment to the tensileperformance requirement (optical performance, fibre strain)3.1.2RTSrated tensile strengthsummation of the product of nominal cross-sectional area, minimum ten
40、sile strength andstranding factor for each load bearing material in the cable construction (refer to Annex A inthe case of OPGW)3.1.3strain marginamount of strain the OCEPL can sustain without strain on the fibres due to the OCEPLselongation3.2 Abbreviations of cablesADSS all-dielectric self-support
41、ing cableMASS metallic aerial self-supported cable which is not designed to have ground or phasecapabilityOCEPL optical cable to be used along electrical power linesOPAC optical attached cable consisting of the following three attachment methods: wrapped: all-dielectric (wrap). Using special machine
42、ry, a lightweight flexiblenon-metallic cable can be wrapped helically around either the earth wire or thephase conductor. lashed: non-metallic cables that are installed longitudinally alongside the earthwire, the phase conductor or on a separate catenary (on a pole route) and areheld in position wit
43、h a binder or adhesive cord.60794-4 IEC:2003 15 preform attached: similar to the lashed cables except that the method ofattachment 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 te
44、lecommunication capabilities.OPPC optical phase conductor. An OPPC has the dual performance functions of a phaseconductor with telecommunication capabilities.4 Optical fibre4.1 GeneralSingle-mode optical fibre which meets the requirements of IEC 60793-2 shall be used. Fibresother than those specifie
45、d above can be used, if mutually agreed between the customer andthe supplier.4.2 Attenuation4.2.1 Attenuation coefficientThe typical maximum attenuation coefficient of a cable at 1 310 nm is 0,45 dB/km and/or at1 550 nm it is 0,30 dB/km. Particular values shall be agreed between the customer and the
46、supplier.The attenuation coefficient shall be measured in accordance with IEC 60793-1-40.4.2.2 Attenuation uniformity4.2.2.1 Attenuation discontinuitiesThe local attenuation shall not have point discontinuities in excess of 0,10 dB.The test method best suited to provide the functional requirements i
47、s in accordance withIEC 60793-1-40.4.2.2.2 Attenuation linearityThe functional requirements are under consideration.4.3 Cut-off wavelength of cabled fibreThe cabled fibre cut-off wavelength cc shall be less than the operational wavelength.4.4 Fibre colouringIf the primary coated fibres are coloured
48、for identification, the coloured coating shall bereadily identifiable throughout the lifetime of the cable and shall be a reasonable match toIEC 60304. If required, the colouring shall permit sufficient light to be transmitted throughthe primary coating to allow local light injection and detection.
49、Alternatively, the colour maybe removable.4.5 Polarization mode dispersion (PMD)Refer to 5.5 of IEC 60794-3.60794-4 IEC:2003 17 5 Cable elementGenerally, optical cables comprise several elements or individual constituents, depending onthe cable design, which take into account the cable application, operating environment andmanufacturing processes, and the need to protect the fibre during handli
