IEC-61156-6-2007.pdf
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1、 INTERNATIONAL STANDARD IEC 61156-6 Second edition 2007-06 Multicore and symmetrical pair/quad cables for digital communications Part 6: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Work area wiring Sectional specification Reference number IEC 61156-6:2007(E) -,-,-
2、THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC, Geneva, Switzerland All rights 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 i
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4、r information. IEC Central Office 3, rue de Varemb CH-1211 Geneva 20 Switzerland Email: inmailiec.ch Web: 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
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8、l: csciec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 INTERNATIONAL STANDARD IEC 61156-6 Second edition 2007-06 Multicore and symmetrical pair/quad cables for digital communications Part 6: Symmetrical pair/quad cables with transmission characteristics up to 1 000 MHz Work area wiring Sectional
9、specification R For price, see current catalogue PRICE CODE Commission Electrotechnique Internationale International Electrotechnical Commission 2 61156-6 IEC:2007(E) CONTENTS FOREWORD.4 1 Scope.6 2 Normative references .6 3 Terms and definitions .7 4 Installation considerations 7 4.1 General.7 4.2
10、Climatic conditions 7 5 Materials and cable construction 7 5.1 General remarks7 5.2 Cable construction 7 5.2.1 Conductor7 5.2.2 Insulation.7 5.2.3 Cable element .7 5.2.4 Cable make-up 8 5.2.5 Screening of the cable core .8 5.2.6 Sheath.8 5.2.7 Identification8 5.2.8 Finished cable .8 6 Characteristic
11、s and requirements .8 6.1 General remarks8 6.2 Electrical characteristics and tests 9 6.2.1 Conductor resistance.9 6.2.2 Resistance unbalance .9 6.2.3 Dielectric strength .9 6.2.4 Insulation resistance9 6.2.5 Mutual capacitance9 6.2.6 Capacitance unbalance .9 6.2.7 Transfer impedance.9 6.2.8 Couplin
12、g attenuation10 6.2.9 Ampacity .10 6.3 Transmission characteristics .10 6.3.1 Velocity of propagation (phase velocity) 10 6.3.2 Phase delay and differential delay (delay skew) 10 6.3.3 Attenuation11 6.3.4 Unbalance attenuation.11 6.3.5 Near-end crosstalk (NEXT).12 6.3.6 Far-end crosstalk (FEXT) .12
13、6.3.7 Alien (exogenous) near-end crosstalk13 6.3.8 Alien (exogenous) far-end crosstalk.13 6.3.9 Alien (exogenous) crosstalk of bundled cables 14 6.3.10 Mean characteristic impedance .14 6.3.11 Return loss (RL) 14 6.4 Mechanical and dimensional characteristics and requirements 14 6.4.1 Dimensional re
14、quirements .14 6.4.2 Elongation at break of the conductors14 6.4.3 Tensile strength of the insulation .14 -,-,- 61156-6 IEC:2007(E) 3 6.4.4 Elongation at break of the insulation15 6.4.5 Adhesion of the insulation to the conductor .15 6.4.6 Elongation at break of the sheath 15 6.4.7 Tensile strength
15、of the sheath .15 6.4.8 Crush test of the cable 15 6.4.9 Impact test of the cable .15 6.4.10 Bending under tension.15 6.4.11 Repeated bending of the cable 15 6.4.12 Tensile performance of the cable.15 6.4.13 Shock-test requirements of the cable.15 6.4.14 Bump-test requirements of the cable .15 6.4.1
16、5 Vibration-test requirements of a cable .15 6.5 Environmental characteristics15 6.5.1 Shrinkage of insulation 15 6.5.2 Wrapping test of insulation after thermal ageing 16 6.5.3 Bending test of insulation at low temperature 16 6.5.4 Elongation at break of the sheath after ageing.16 6.5.5 Tensile str
17、ength of the sheath after ageing16 6.5.6 Sheath pressure test at high temperature 16 6.5.7 Cold bend test of the cable16 6.5.8 Heat shock test16 6.5.9 Damp heat steady state.16 6.5.10 Solar radiation.16 6.5.11 Solvents and contaminating fluids16 6.5.12 Salt mist and sulphur dioxide.16 6.5.13 Water i
18、mmersion .16 6.5.14 Hygroscopicity.16 6.5.15 Wicking .16 6.5.16 Flame propagation characteristics of a single cable.17 6.5.17 Flame propagation characteristics of bunched cables17 6.5.18 Halogen gas evolution .17 6.5.19 Smoke generation .17 6.5.20 Toxic gas emission17 6.5.21 Integrated fire test .17
19、 7 Introduction to the blank detail specification .17 Bibliography18 Table 1 Cable categories .6 Table 2 Transfer impedance 10 Table 3 Coupling attenuation .10 Table 4 Attenuation, constant values .11 Table 5 Near-end unbalance attenuation12 Table 6 Worst-pair PS NEXT values 12 Table 7 Worst-pair PS
20、 EL FEXT 13 Table 8 PS ANEXT 13 Table 9 PS AELFEXT 14 Table 10 Return loss14 -,-,- 4 61156-6 IEC:2007(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MULTICORE AND SYMMETRICAL PAIR/QUAD CABLES FOR DIGITAL COMMUNICATIONS Part 6: Symmetrical pair/quad cables with transmission characteristics up to 1 00
21、0 MHz Work area wiring Sectional specification 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 international co-operation on
22、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 Pub
23、lication(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 participate in this preparation.
24、 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 international consensus of
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