IEC TR 60092-370-2009 Electrical installations in ships - Part 370 Guidance on the selection of cables for telecommunication and data transfer including radio-f.pdf

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1、 IEC/TR 60092-370 Edition 1.0 2009-07 TECHNICAL REPORT Electrical installations in ships Part 370: Guidance on the selection of cables for telecommunication and data transfer including radio-frequency cables IEC/TR 60092-370:2009(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2009 IEC, Geneva,

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10、 11 Fax: +41 22 919 03 00 IEC/TR 60092-370 Edition 1.0 2009-07 TECHNICAL REPORT Electrical installations in ships Part 370: Guidance on the selection of cables for telecommunication and data transfer including radio-frequency cables INTERNATIONAL ELECTROTECHNICAL COMMISSION R ICS 29.060.20; 47.020.6

11、0 PRICE CODE ISBN 2-8318-1051-3 Registered trademark of the International Electrotechnical Commission 2 TR 60092-370 IEC:2009(E) CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Terms and definitions .6 3 Selection of cables .6 4 Fundamental considerations.6 5 Constructional considerations.7 5.1 Selec

12、tion of conductor.7 5.2 Selection of insulation .7 5.3 Cable elements .7 5.4 Selection of screen, core screen or shield .7 5.5 Selection of outer protection8 5.6 Selection of metallic sheath (covering), braid or armour 8 6 Marking 8 7 Guidance on the selection of appropriate tests .8 8 Guide to use.

13、9 8.1 Introduction .9 8.2 General .9 8.3 Voltage rating9 8.3.1 Data and telecommunication cables 9 8.3.2 High-frequency radio communications cables 10 8.4 Current ratings 10 8.5 Thermal considerations .10 8.6 Size of conductors.10 8.7 Radius of bend10 8.8 Tensile stress11 8.9 Compression .11 8.10 Me

14、chanical damage 11 8.11 Electromagnetic interference.11 8.12 Terminations .12 8.13 Joints 12 9 Performance in a fire12 Annex A (informative) Table of tests 14 Bibliography17 Table 1 Classification of cables by frequency range.9 TR 60092-370 IEC:2009(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ E

15、LECTRICAL INSTALLATIONS IN SHIPS Part 370: Guidance on the selection of cables for telecommunication and data transfer including radio-frequency cables FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechn

16、ical 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,

17、 Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter 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, gov

18、ernmental and non- governmental organizations liaising with the IEC also participate 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 decision

19、s or agreements of IEC on technical matters express, as nearly as possible, an international 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 internati

20、onal use and are accepted by IEC National Committees in that sense. While all reasonable 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

21、to promote international uniformity, IEC National Committees undertake to apply IEC 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 clearl

22、y indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall

23、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 for costs (including legal

24、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 correct application of this public

25、ation. 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. The main task of IEC technical committees is to prepare International Standards. How

26、ever, a technical committee may propose the publication of a technical report when it has collected data of a different kind from that which is normally published as an International Standard, for example “state of the art“. IEC 60092-370, which is a technical report, has been prepared by subcommitt

27、ee 18A: Electric cables for ships and mobile and fixed offshore units, of IEC technical committee 18: Electrical installations of ships and of mobile and fixed offshore units. 4 TR 60092-370 IEC:2009(E) The text of this technical report is based on the following documents: Enquiry draft Report on vo

28、ting 18A/289/DTR 18A/302/RVC Full information on the voting for the approval of this technical report can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 60092 series ca

29、n be found, under the general title Electrical installations in ships, on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the sp

30、ecific 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 at a later date. TR 60092-370 IEC:2009(E) 5 INTRODUCTION IEC 60092 series of International Standards concerns electrical

31、installations in sea-going ships, and fixed and mobile offshore units, incorporating good practice and co-ordinating as far as possible existing rules. These standards form a code of practical interpretation and amplification of the requirements of the International Convention on Safety of Life at S

32、ea, a guide for future regulations which may be prepared and a statement of practice for use by shipowners, shipbuilders, mobile and fixed offshore units owners and builders and appropriate organisations. This IEC/TR 60092-370 has been prepared by the maintenance team MT2 of the IEC subcommittee 18A

33、. Cables selected for installation onboard ships and on offshore installations are usually installed and are expected to operate in much harsher environments than equivalent land based types. The risk of mechanical abuse during installation, physical dislocation due to tension and bending allied wit

34、h extremes of temperature are examples of the conditions to which these cables may be subject. If faults occur unlike onshore installations, trained experienced technicians may not always be readily available to affect a repair or replacement. 6 TR 60092-370 IEC:2009(E) ELECTRICAL INSTALLATIONS IN S

35、HIPS Part 370: Guidance on the selection of cables for telecommunication and data transfer including radio-frequency cables 1 Scope This Technical Report gives guidance and lays down the basic recommendations for the selection and installation of shipboard and offshore unit cables intended for elect

36、rical systems used in both essential and non-essential analogue or digital signal communication, transmission and control networks, including types suitable for high-frequency signals (i.e. signals with a frequency of more than 10 5Hz). These cables are not suitable for direct connection to low impe

37、dance supplies. Where such cables are required, attention is drawn to IEC 60092-353. Cables intended to have limited circuit integrity (fire resistance) when affected by fire are not covered by this technical report. Fibre optical cables are not included. Sub-sea or umbilical cables are not included

38、. 2 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60092-350 apply. 3 Selection of cables Cables with physical and electrical characteristics in accordance with the IEC 60092 series of international standards are recommended for use in the marine envi

39、ronment. Cables constructed in accordance with the following standards are acceptable provided that due consideration has been given to their use in a marine environment: IEC 60189-1, IEC 60189-2, IEC 60189-3, and IEC 60096-0-1. 4 Fundamental considerations The choice of materials and cable construc

40、tion should be suitable for the intended application and installation of the cable. The high level of electrical performance associated with many modern cables is only achieved by the accurate, consistent positioning of the various components within the cable. Careless or excess tension, compression

41、 or bending can alter this relationship. This may then have significant detrimental effects upon the fundamental performance of the cable at high data rates. Similarly these high levels of electrical performance can usually only be achieved by the use of polymers and insulation systems that may not

42、have the same reaction to fire characteristics as the more traditional materials used in other marine cables. In recognition of this, careful consideration should be given to the method of installation to select that most appropriate to the particular application (see also Clause 8). TR 60092-370 IE

43、C:2009(E) 7 5 Constructional considerations 5.1 Selection of conductor Only circular copper conductors, either plain or metal coated, or copper covered steel are recommended for use in a marine environment. Stranded conductors are recommended for general use. Where the applicable product standard sp

44、ecifies solid conductors, consideration should be given to the possible effects of vibration (due to the movement of the ship or installation) or movement (due to motion of the ship or installation). The properties of copper conductors should be in accordance with IEC 60228. Joints in solid conducto

45、rs or complete stranded conductors are not permitted, however joints in individual strands are allowed. NOTE When cables are subject to continuous flexing the advice of the manufacture should be sought. 5.2 Selection of insulation The range of materials for use as conductor insulation should, where

46、possible, be selected from those listed in the IEC 60092-351 or as given in IEC 60096-0-1 and IEC 61156-5-1. For cables operating at the higher frequencies the insulation may be solid, cellular or a foam skin composite. The rated operating temperature of the insulating material should be at least 10

47、 C higher than the maximum ambient temperature likely to exist, or to be produced, in the space where the cable is installed. The insulation should be continuous having a thickness as uniform as possible. The insulation should be applied to fit closely to the conductor. NOTE The user should carefull

48、y select the insulation material regarding its electrical characteristics and intended use in the marine environment. 5.3 Cable elements The cores within each pair, triple, or quad should be clearly identified by colour or number as given in the applicable cable standard. The identification used sho

49、uld be durable and legible. The choice of the maximum average length of lay in the finished cable should be selected with respect to the specified crosstalk requirements, handling performance and the pair or quad integrity. 5.4 Selection of screen, core screen or shield If a screen is required, it may consist of the following: a) a metallic laminated tape bonded to polyester and a drain wire in direct contact with the metallic side of the tape, b) plain or metal coated copper braid, c)