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
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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
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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
