IEC_60502-2ed2.0en-d.pdf

Power cables with extruded insulation and their accessories for rated voltages from 1 kV(Um=1,2 kV)up to 30 kV(Um=36 kV)Part 2:Cables for rated voltages from 6 kV(Um=7,2 kV)up to 30 kV(Um=36 kV)Reference number IEC 60502-2:2005(E)INTERNATIONAL STANDARD IEC60502-2 Second edition2005-03 This English-language version is derived from the original bilingual publication by leaving out all French-language pages.Missing page numbers correspond to the French-language pages.Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editions The IEC is now publishing consolidated versions of its publications.For example,edition numbers 1.0,1.1 and 1.2 refer,respectively,to the base publication,the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2.Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC,thus ensuring that the content reflects current technology.Information relating to this publication,including its validity,is available in the IEC Catalogue of publications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress undertaken by the technical committee which has prepared this publication,as well as the list of publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publications The on-line catalogue on the IEC web site(www.iec.ch/searchpub)enables you to search by a variety of criteria including text searches,technical committees and date of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/justpub)is also available by email.Please contact the Customer Service Centre(see below)for further information.Customer Service Centre If you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.ch Tel:+41 22 919 02 11 Fax:+41 22 919 03 00 Power cables with extruded insulation and their accessories for rated voltages from 1 kV(Um=1,2 kV)up to 30 kV(Um=36 kV)Part 2:Cables for rated voltages from 6 kV(Um=7,2 kV)up to 30 kV(Um=36 kV)For price,see current catalogue IEC 2005 Copyright-all rights reserved 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 the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch INTERNATIONAL STANDARD IEC60502-2 Second edition2005-03 XC Commission Electrotechnique InternationaleInternational Electrotechnical Commission PRICE CODE 60502-2 IEC:2005 3 CONTENTS FOREWORD.13 1 Scope.17 2 Normative references.17 3 Terms and definitions.19 3.1 Definitions of dimensional values(thicknesses,cross-sections,etc.).19 3.2 Definitions concerning the tests.21 4 Voltage designations and materials.21 4.1 Rated voltages.21 4.2 Insulating compounds.23 4.3 Sheathing compounds.25 5 Conductors.27 6 Insulation.27 6.1 Material.27 6.2 Insulation thickness.27 7 Screening.29 7.1 Conductor screen.31 7.2 Insulation screen.31 8 Assembly of three-core cables,inner coverings and fillers.31 8.1 Inner coverings and fillers.31 8.2 Cables having a collective metallic layer(see Clause 9).33 8.3 Cables having a metallic layer over each individual core (see Clause 10).33 9 Metallic layers for single-core and three-core cables.35 10 Metallic screen.35 10.1 Construction.35 10.2 Requirements.35 10.3 Metallic screens not associated with semi-conducting layers.35 11 Concentric conductor.35 11.1 Construction.35 11.2 Requirements.37 11.3 Application.37 12 Metallic sheath.37 12.1 Lead sheath.37 12.2 Other metallic sheaths.37 13 Metallic armour.37 13.1 Types of metallic armour.37 13.2 Materials.39 13.3 Application of armour.39 13.4 Dimensions of the armour wires and armour tapes.41 13.5 Correlation between cable diameters and armour dimensions.41 13.6 Round or flat wire armour.43 13.7 Double tape armour.43 60502-2 IEC:2005 5 14 Oversheath.43 14.1 General.43 14.2 Material.45 14.3 Thickness.45 15 Test conditions.45 15.1 Ambient temperature.45 15.2 Frequency and waveform of power frequency test voltages.45 15.3 Waveform of impulse test voltages.45 16 Routine tests.47 16.1 General.47 16.2 Electrical resistance of conductors.47 16.3 Partial discharge test.47 16.4 Voltage test.47 17 Sample tests.49 17.1 General.49 17.2 Frequency of sample tests.51 17.3 Repetition of tests.51 17.4 Conductor examination.51 17.5 Measurement of thickness of insulation and of non-metallic sh