1、 IEC 60794-1-24 Edition 1.0 2014-05 INTERNATIONAL STANDARD Optical fibre cables Part 1-24: Generic specification Basic optical cable test procedures Electrical test methods IEC 60794-1-24:2014-05(en) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2014 IEC, Geneva, Switzerland All ri
2、ghts reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IECs member National Committee in the country of the requ
3、ester. If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varemb Fax: +41 22
4、919 03 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The t
5、echnical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published. IEC Catalogue - webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical in
6、formation on IEC International Standards, Technical Specifications, Technical Reports and other documents. Available for PC, Mac OS, Android Tablets and iPad. IEC publications search - www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criteria (reference numbe
7、r, text, technical committee,). It also gives information on projects, replaced and withdrawn publications. IEC Just Published - webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published details all new publications released. Available online and also once a month by
8、email. Electropedia - www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing more than 30 000 terms and definitions in English and French, with equivalent terms in 14 additional languages. Also known as the International Electrotechnical Vocabulary (I
9、EV) online. IEC Glossary - std.iec.ch/glossary More than 55 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002. Some entries have been collected from earlier publications of IEC TC 37, 77, 86 and CISPR.
10、 IEC Customer Service Centre - webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 60794-1-24 Edition 1.0 2014-05 INTERNATIONAL STANDARD Optical fibre cables Part 1-24: Generic specificati
11、on Basic optical cable test procedures Electrical test methods INTERNATIONAL ELECTROTECHNICAL COMMISSION M ICS 33.180.10 PRICE CODE ISBN 978-2-8322-1576-0 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized di
12、stributor. colour inside 2 IEC 60794-1-24:2014 IEC 2014 CONTENTS FOREWORD . 3 1 Scope 5 2 Normative references 5 3 Method H1: Short-circuit test (for OPGW and OPAC) . 5 3.1 Object . 5 3.2 Sample . 5 OPGW testing 5 3.2.1OPAC testing . 6 3.2.2 3.3 Apparatus . 6 3.4 Procedure . 7 OPGW testing 7 3.4.1OP
13、AC testing . 7 3.4.2Common procedure for OPGW and OPAC . 8 3.4.3 3.5 Requirements . 8 3.6 Details to be specified . 8 OPGW testing 8 3.6.1OPAC testing . 8 3.6.2 4 Method H2: Lightning test method for optical aerial cables along electric power lines (OPGW and OPAC) . 8 4.1 Object . 8 4.2 General . 9
14、4.3 Sample . 9 4.4 Apparatus . 9 4.5 Procedure . 10 4.6 Requirements . 10 4.7 Details to be specified . 10 5 Method H3 Electrical continuity test of cable metallic elements . 10 5.1 Object . 10 5.2 Sample . 10 5.3 Apparatus . 10 5.4 Procedure . 11 5.5 Requirements . 11 5.6 Details to be specified .
15、11 Bibliography 12 Figure 1 OPGW short-circuit test arrangement . 6 Figure 2 OPAC short-circuit test arrangement 7 Figure 3 Lightning test arrangement . 9 Table 1 Test parameters 10 IEC 60794-1-24:2014 IEC 2014 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRE CABLES Part 1-24: Generic spe
16、cification Basic optical cable test procedures Electrical test methods 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 promote intern
17、ational 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 Guides (hereafter
18、 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 also particip
19、ate 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 possible, an in
20、ternational 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. While all rea
21、sonable 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 undertake to apply I
22、EC 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 itself does not provide any attestation of conf
23、ormity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publica
24、tion. 7) No liability shall attach to IEC or its directors, employees, servants or agents including 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
25、 for costs (including legal fees) and expenses arising out of the publication, use of, or reliance 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 correc
26、t application of this publication. 9) Attention is drawn to the possibility that some of the elements 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 60794-1-24 has been prepared
27、by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This edition of IEC 60794-1-24 cancels and replaces the electrical tests methods section of the second edition of IEC 60794-1-2, published in 2003 (and subsequently replaced by the third edition). It constitutes a t
28、echnical revision. It has been decided to split the second edition of IEC 60794-1-2 into six new documents: IEC 60794-1-2 : Cross reference table IEC 60794-1-20 : General and definitions IEC 60794-1-21 : Mechanical tests IEC 60794-1-22 : Environmental tests 4 IEC 60794-1-24:2014 IEC 2014 IEC 60794-1
29、23 : Cable elements IEC 60794-1-24 : Electrical tests The text of this standard is based on the following documents: FDIS Report on voting 86A/1591/FDIS 86A/1606/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. T
30、his publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all the parts in the IEC 60794 series, published under the general title Optical fibre cables, can be found on the IEC website. The committee has decided that the contents of this publication will remain un
31、changed until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued
32、 at a later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. IEC 60794-1-24:2014 IEC 2014
33、 5 OPTICAL FIBRE CABLES Part 1-24: Generic specification Basic optical cable test procedures Electrical test methods 1 Scope This part of IEC 60794 applies to optical fibre cables for use with telecommunication equipment and devices employing similar techniques, and to cables having a combination of
34、 both optical fibres and electrical conductors. The object of this standard is to define test procedures to be used in establishing uniform requirements for electrical requirements. Throughout the standard the wording “optical cable” may also include optical fibre units, microduct fibre units, etc.
35、2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amend
36、ments) applies. Void. 3 Method H1: Short-circuit test (for OPGW and OPAC) 3.1 Object The short-circuit test is intended to assess the performance of the OPGW (optical ground wire) under typical short-circuit, or the impact on the performance of OPAC (optical attached cable) under short-circuit curre
37、nt on the messenger wire. 3.2 Sample OPGW testing 3.2.1 3.2.1.1 Two samples test method A typical arrangement using two test samples is shown in Figure 1. Two samples, each being at least 10 m long, shall be terminated at each end with suitable fittings. In sample A, one or more thermocouples shall
38、be inserted into holes drilled into the optical unit to monitor the optical unit temperature. In sample B, one or more thermocouples shall be attached to the wires of the OPGW to monitor the OPGW temperature. Fibre optical attenuation shall be measured using a light source and power meter connected
39、to each end of the test fibre of sample B. The test length of the optical fibre shall be a minimum of 100 m (when the sample is shorter than 100 m, concatenation shall be used) . 6 IEC 60794-1-24:2014 IEC 2014 3.2.1.2 One sample test method The sample, at least 10 m long, shall be terminated at each
40、 end with suitable fittings. One or more thermocouples shall be inserted through the strands of the OPGW onto the surface of the optical unit to monitor the optical unit temperature. One or more thermocouples shall be attached to the wires of the OPGW to monitor the OPGW temperature. Fibre optical a
41、ttenuation shall be measured using a light source and power meter connected to each end of the test fibre. The test length of the optical fibre shall be a minimum of 100 m. (when the sample is shorter than 100 m, concatenation shall be used). OPAC testing 3.2.2 A typical arrangement for testing OPAC
42、 is shown in Figure 2. The OPAC test sample, at least 10 m long, is attached to the agreed messenger wire with suitable fittings. Thermocouples shall be attached to the messenger wire to record the temperature achieved during the test. In addition, a light source and power meter shall be connected t
43、o each end of the test fibre in the OPAC to measure the relative attenuation level. The test length of optical fibre shall be a minimum of 100 m (when the sample is shorter than 100 m, concatenation shall be used). 3.3 Apparatus Key 1 thermocouples - armour temperature is measured - optical core tem
44、perature is measured 2 thermocouple recorder 3 light source 4 power meter 5 recorder 6 fibre looped A, B test samples Figure 1 OPGW short-circuit test arrangement IEC 1563/14 A B 1 2 3 4 6 5 IEC 60794-1-24:2014 IEC 2014 7 Key 1 thermocouple - messenger temperature is measured 2 thermocouple recorder
45、 3 light source 4 power meter 5 recorder 6 fibre looped A attached cable B messenger Figure 2 OPAC short-circuit test arrangement 3.4 Procedure OPGW testing 3.4.1 The general test conditions are as follows: Tensile load: 15 % 5 % of RTS (rated tensile strength) Sample length: 10 m Fibre test length:
46、 100 m Initial sample temperature: as agreed between customer and supplier Fault current intensity: as agreed between customer and supplier Fault current duration: as agreed between customer and supplier Number of pulses: 3 minimum Waveform: to be symmetrical after the 3 rdcycle The current pulses s
47、hall be applied with the metallic cables being allowed to cool down to within 5 C of the initial temperature between each pulse. Optical attenuation of the test fibres shall be monitored continuously for at least 2 min before, until at least 5 min after each current pulse. The temperature of the OPG
48、W and the optical unit shall be monitored. OPAC testing 3.4.2 The general test conditions are as follows: Tensile load: agreed between customer and supplier Sample length: 10 m Fibre test length: 100 m Initial sample temperature: as agreed between customer and supplier Messenger maximum temperature:
49、 refer to the detail specification IEC 1564/14 B 1 2 3 4 5 6 A 8 IEC 60794-1-24:2014 IEC 2014 Fault current duration: refer to customer specification Number of pulses: 3 minimum Waveform: to be symmetrical after the 3 rdcycle The initial messenger wire temperature shall be mutually agreed between the customer and the supplier. The current pulses shall be applied with the messenger wire being allowed to cool down to within 5 C of t
