SANS 60840-2006 Power cables with extruded insulation and their accessories for rated voltages above 30 kV (Um = 36 kV) up to 150 kV (Um = 170 kV) - Test methods and requirements《额.pdf

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1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 29.060.20 ISBN 0-626-17955-6 SANS 60840:2006Edition 1IEC 60840:2004Edition 3SOUTH AFRICAN NATIONAL STANDARD Power cables with extruded insulation and

4、 their accessories for rated voltages above 30 kV (Um= 36 kV) up to 150 kV (Um= 170 kV) Test methods and requirements This national standard is the identical implementation of IEC 60840:2004 and is adopted with the permission of the International Electrotechnical Commission. Published by Standards S

5、outh Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 60840:2006 Edition 1 IEC 60840:2004 Edition 3 Table of changes Change No. Date Scope Abstract Covers test methods and re

6、quirements for power cable systems for fixed installations, for rated voltages above 30 kV (Um= 36 kV) up to and including 150 kV (Um= 170 kV). Also covers cables and accessories for usual conditions of installation and operation. Keywords electrical accessories, installations, power cables. Nationa

7、l foreword This South African standard was approved by National Committee StanSA TC 66, Electric cables, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. NORME INTERNATIONALECEIIECINTERNATIONAL STANDARD 60840Troisime ditionThird edition200

8、4-04Cbles dnergie isolation extrude et leurs accessoires pour des tensions assignes suprieures 30 kV (Um= 36 kV) et jusqu 150 kV (Um= 170 kV) Mthodes et exigences dessai Power cables with extruded insulation and their accessories for rated voltages above 30 kV (Um= 36 kV) up to 150 kV (Um= 170 kV) T

9、est methods and requirements Pour prix, voir catalogue en vigueur For price, see current catalogue IEC 2004 Droits de reproduction rservs Copyright - all rights reserved Aucune partie de cette publication ne peut tre reproduite ni utilise sous quelque forme que ce soit et par aucun procd, lectroniqu

10、e ou mcanique, y compris la photocopie et les microfilms, sans laccord crit de lditeur. 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. Internation

11、al 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 CODE PRIX PRICE CODE XA Commission Electrotechnique InternationaleInternational Electrotechnical Commission 60840 IEC

12、:2004 3 CONTENTS FOREWORD.9 INTRODUCTION.13 1 Scope.15 2 Normative references15 3 Definitions 17 3.1 Definitions of dimensional values (thicknesses, cross-sections, etc.)17 3.2 Definitions concerning the tests .17 4 Voltage designations and materials.19 4.1 Rated voltages 19 4.2 Cable insulating mat

13、erials19 4.3 Cable oversheathing materials.19 5 Precautions against water penetration in cables 21 6 Cable characteristics 21 7 Accessory characteristics21 8 Test conditions .23 8.1 Ambient temperature .23 8.2 Frequency and waveform of power frequency test voltages 23 8.3 Waveform of lightning impul

14、se test voltages.23 8.4 Relationship of test voltages to rated voltages23 8.5 Determination of the cable conductor temperature .23 9 Routine tests on cables and on the main insulation of prefabricated accessories .25 9.1 General .25 9.2 Partial discharge test .25 9.3 Voltage test .25 9.4 Electrical

15、test on oversheath of the cable .27 10 Sample tests on cables.27 10.1 General .27 10.2 Frequency of tests .27 10.3 Repetition of tests27 10.4 Conductor examination 27 10.5 Measurement of electrical resistance of conductor and metallic screen 27 10.6 Measurement of thickness of cable insulation and o

16、versheath29 10.7 Measurement of thickness of metallic sheath .31 10.8 Measurement of diameter 33 10.9 Hot set test for XLPE, EPR and HEPR insulations33 10.10 Measurement of capacitance .33 10.11 Measurement of density of HDPE insulation.33 11 Sample tests on accessories.33 11.1 Tests on components 3

17、3 11.2 Tests on complete accessory.33 12 Type tests on cable systems .35 12.1 Range of type approval35 12.2 Summary of type tests .37 12.3 Electrical type tests on complete cable systems .37 12.4 Non-electrical type tests on cable components and on completed cable .45 60840 IEC:2004 5 13 Type tests

18、on cables.55 13.1 Range of type approval55 13.2 Summary of type tests .57 13.3 Electrical type tests on completed cables .57 14 Type tests on accessories.59 14.1 Range of type approval59 14.2 Summary of type tests .59 14.3 Electrical type tests on accessories61 15 Electrical tests after installation

19、.63 15.1 DC voltage test of the oversheath 63 15.2 AC voltage test of the insulation.63 Annex A (informative) Determination of the cable conductor temperature77 Annex B (normative) Rounding of numbers.85 Annex C (informative) Summary of type tests of cable systems, of cables and of accessories.87 An

20、nex D (normative) Method of measuring resistivity of semi-conducting screens.89 Annex E (normative) Determination of hardness of HEPR insulations93 Annex F (normative) Water penetration test97 Annex G (normative) Tests on components of cables with a longitudinally applied metal foil 101 Annex H (nor

21、mative) Tests of outer protection for buried joints .107 Bibliography111 Figure A.1 Typical test set-up for the reference loop and the main test loop 79 Figure A.2 Arrangement of the thermocouples on the conductor of the reference loop.79 Figure D.1 Preparation of samples for measurement of resistiv

22、ity of conductor and insulation screens .91 Figure E.1 Test on surfaces of large radius of curvature .95 Figure E.2 Test on surfaces of small radius of curvature.95 Figure F.1 Schematic diagram of apparatus for water penetration test 99 Figure G.1 Adhesion of metal foil101 Figure G.2 Example of over

23、lapped metal foil.103 Figure G.3 Peel strength of overlapped metal foil103 Table 1 Insulating compounds for cables 63 Table 2 Oversheathing compounds for cables.65 Table 3 Tan requirements for insulating compounds for cables65 Table 4 Test voltages.65 Table 5 Non-electrical type tests for insulating

24、 and oversheathing compounds for cables.67 Table 6 Test requirements for mechanical characteristics of insulating compounds for cables (before and after ageing)69 60840 IEC:2004 7 Table 7 Test requirements for mechanical characteristics of oversheathing compounds for cables (before and after ageing)

25、 71 Table 8 Test requirements for particular characteristics of insulating compounds for cables.73 Table 9 Test requirements for particular characteristics of PVC oversheathing compounds for cables .75 Table C.1 Type tests on cable systems, on cables and on accessories .87 Table H.1 Impulse voltage

26、tests109 60840 IEC:2004 9 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ POWER CABLES WITH EXTRUDED INSULATION AND THEIR ACCESSORIES FOR RATED VOLTAGES ABOVE 30 kV (Um= 36 kV) UP TO 150 kV (Um= 170 kV) TEST METHODS AND REQUIREMENTS FOREWORD 1) The International Electrotechnical Commission (IEC) is a wo

27、rldwide organization for standardization 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

28、 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 committees; any IEC National Committee interested in the su

29、bject dealt with may participate in this preparatory work. International, governmental 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 d

30、etermined 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 opinion on the relevant subjects since each technical committee has representation from all interested IEC National Co

31、mmittees. 3) IEC Publications have the form of recommendations for international 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 wh

32、ich they are used or for any misinterpretation by any end user. 4) In order 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 Public

33、ation and the corresponding national or regional publication shall be clearly 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 t

34、hat they have the latest edition of this publication. 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 n

35、ature whatsoever, whether direct or indirect, or 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 referen

36、ced publications is indispensable for the correct 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. Internat

37、ional Standard IEC 60840 has been prepared by IEC technical committee 20: Electric cables. This third edition cancels and replaces the second edition published in 1999 and constitutes a technical revision. The significant technical changes with respect to the previous edition are described in the in

38、troduction of this edition. The text of this standard is based on the following documents: FDIS Report on voting 20/684/FDIS 20/692/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. 60840 IEC:2004 11 This publicati

39、on has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the content of this publication will remain unchanged until 2008. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. 60840 IEC:2004 13 INTRODUCT

40、ION This document is a major revision of IEC 60840, second edition, published in February 1999. During the preparation of the second edition, a number of comments of principle were made on the CD and CDV and, at its meeting in February 1998, the former SC20A of TC20 agreed that these comments should

41、 be the basis of a major revision of IEC 60840 under the maintenance cycle. In addition, during the preparation of the new IEC 62067 covering cable systems above 150 kV up to 500 kV, it appeared that a number of comments were also applicable to IEC 60840. Therefore, all these comments were considere

42、d in the preparation of this third edition. In addition, the following other aspects have been considered. The first edition of IEC 60840, published in 1988, dealt only with cables. Accessories were added to the second edition, published in February 1999, which separately covered test methods and te

43、st requirements for a) cables alone; b) cables together with accessories (a cable system). Some countries have suggested that a better discrimination be made between systems, cables and accessories, particularly for the lower voltages of the scope, e.g. 45 kV. This has been taken into account in thi

44、s revision, which gives the type approval requirements and the range of approvals for a) cable systems; b) cables alone; c) accessories alone. Manufacturers and users may choose the most appropriate option for type approval. During the meeting of TC20 held in Stockholm in September 2000, it was agre

45、ed that WG16 consider the guidelines made by CIGRE for cables having a longitudinally applied metal foil, published in Electra n141 in April 1992. WG16 carried out this task and, further to a survey on the experience with such cables, have concluded that only a part of these guidelines should be int

46、roduced in this standard as a normative annex. Consideration has also been given to the recent work carried out by CIGRE on tests after installation on high voltage extruded insulation cables, the recommendations of which were published in Electra n173 in August 1997. These recommendations state, am

47、ong others, that d.c. tests should be avoided on the main insulation, as they are both ineffective and dangerous. On the other hand, d.c. tests are recommended on the oversheath. A list of relevant CIGRE references is given in the bibliography. 60840 IEC:2004 15 POWER CABLES WITH EXTRUDED INSULATION

48、 AND THEIR ACCESSORIES FOR RATED VOLTAGES ABOVE 30 kV (Um= 36 kV) UP TO 150 kV (Um= 170 kV) TEST METHODS AND REQUIREMENTS 1 Scope This International Standard specifies test methods and requirements for power cable systems for fixed installations, for rated voltages above 30 kV (Um= 36 kV) up to and

49、including 150 kV (Um= 170 kV). It also separately covers cables and accessories. The requirements apply to single-core cables and to individually screened three-core cables and to their accessories for usual conditions of installation and operation, but not to special cables and their accessories, such as submarine cables, for which modifications to the standard tests may be necessary or special test conditi