1、 IEC 61156-1-4 Edition 1.0 2018-10 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 1-4:Assessment of conductor heating in bundled cables due to the deployment of remote powering IEC 61156-1-4:2018-10(en)colourinside THIS PUBLICATION IS COPYRIGHT PROT
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10、ore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance,please contact the Customer Service Centre:salesiec.ch.IEC 61156-1-4 Edition 1.0 2018-10 INTERNATIONAL STANDARD Multicore and symmetrical pair/quad cables for digital communications Part 1-4:Assessment
11、 of conductor heating in bundled cables due to the deployment of remote powering INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 33.120.20 ISBN 978-2-8322-5968-9 Registered trademark of the International Electrotechnical Commission Warning!Make sure that you obtained this publication from an authorize
12、d distributor.colourinside 2 IEC 61156-1-4:2018 IEC 2018 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references.6 3 Terms,definitions and symbols.6 3.1 Terms and definitions.6 3.2 Symbols.7 4 Testing procedure.8 4.1 General.8 4.2 Bundling of cables.8 4.3 Testing current and measurement
13、accuracy.10 4.4 Test conditions.10 4.5 Environmental conditions.10 4.6 Assessment of the concatenated loop resistance of all pairs.13 4.7 Data submission.13 4.8 Expression of results.14 Annex A(informative)Modelling of cable bundle heating 3.15 A.1 Cable heating model.15 A.2 Evaluation of recorded d
14、ata.18 Bibliography.19 Figure 1 Bundle of cables under test.9 Figure 2 Thermocouple placement.9 Figure 3 Free air.11 Figure 4 Open conduit(Tray).11 Figure 5 Conduit.12 Figure 6 Sealed conduit.13 Table 1 Supporting information.14 Table 2 Test data format.14 IEC 61156-1-4:2018 IEC 2018 3 INTERNATIONAL
15、 ELECTROTECHNICAL COMMISSION _ MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 1-4:Assessment of conductor heating in bundled cables due to the deployment of remote powering FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standa
16、rdization comprising all national electrotechnical committees(IEC National Committees).The object of IEC is to promote international 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 referred to as“IEC Publication(s)”).Their preparation is entrusted to technical co
