SANS 61467-2009 Insulators for overhead lines - Insulator strings and sets for lines with a nominal voltage greater than 1 000 V - AC power arc tests《高架线路绝缘子 标称电压超过1000V的绝缘线缆及装置 交流.pdf

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. ISBN 978-0-626-22169-0 SANS 61467:2009 Edition 2 IEC 61467:2008 Edition 1 SOUTH AFRICAN NATIONAL STANDARD Insulators for overhead lines Insulator strings

4、 and sets for lines with a nominal voltage greater than 1 000 V AC power arc tests This national standard is the identical implementation of IEC 61467:2008 and is adopted with the permission of the International Electrotechnical Commission. Published by SABS Standards Division 1 Dr Lategan Road Groe

5、nkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 61467:2009 Edition 2 IEC 61467:2008 Edition 1 Table of changes Change No. Date Scope Nation

6、al foreword This South African standard was approved by National Committee SABS SC 67D, Electricity distribution systems and components Insulators, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in F

7、ebruary 2009. This SANS document supersedes SANS 61467:1997 (edition 1 as modified by IEC corr.:1997 and nat. amdt 1:2007), which was published by the IEC as a technical report. This SANS document constitutes a technical revision and it now has the status of an International Standard. This standard

8、may only be used and printed by approved subscription and freemailing clients of the SABS. IEC 61467 Edition 1.0 2008-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Insulators for overhead lines Insulator strings and sets for lines with a nominal voltage greater than 1 000 V AC power arc tests Isola

9、teurs pour lignes ariennes Chanes disolateurs et chanes disolateurs quipes pour lignes de tension nominale suprieure 1 000 V Essais darc de puissance en courant alternatif INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE X ICS 29.080.10; 29.240.20 PRICE CODE CODE

10、PRIX ISBN 2-8318-9953-2 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale SANS 61467:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 2 61467 IEC:2008 CONTENT

11、S FOREWORD.4 1 Scope and object6 2 Normative references .6 3 Terms and definitions .6 4 Symbols and abbreviations.7 5 Characteristics of the test current.8 6 Supply and return circuit conditions9 7 Tests on insulator sets .11 7.1 General remarks11 7.2 Test arrangement11 7.3 Test current.11 7.4 Suppl

12、y and return circuit conditions.11 7.5 Arc initiation 12 7.6 Ambient conditions14 7.7 Test series and characteristics of the power arcs 14 8 Tests on short strings .14 8.1 General remark .14 8.2 Test arrangement15 8.3 Test current.15 8.4 Supply and return circuit conditions.15 8.5 Arc initiation 15

13、8.6 Ambient conditions15 8.7 Test series and characteristics of the power arcs 16 9 Test report18 10 Evaluation of results.18 10.1 General remark .18 10.2 Visual examination 18 10.3 Porcelain or glass insulators18 10.4 Composite insulators.19 10.5 Acceptance criteria19 Annex A (normative) Examples o

14、f test arrangements and practical methods of tower simulation (return circuit) 20 Annex B (normative) Determination of the r.m.s. value of the current.25 Annex C (informative) No-load voltage of the power source .27 Annex D (informative) Power arcs on insulator sets and their true simulation by appr

15、opriate positioning of fusible wires .28 Annex E (informative) Wind velocity during power arc tests .30 Annex F (informative) Variation of the fault current magnitude and reasons for the choice of the prescribed test parameters 31 Annex G (informative) Recommendations for the test report 33 Annex H

16、informative) Sample of a power arc test report .37 Bibliography40 Figure 1 Illustration of supply and return currents 10 Figure 2 Arc initiation.13 SANS 61467:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS.61467 IEC:2008 3 Figure 3 Mounti

17、ng arrangement for short strings17 Figure A.1 Test arrangement of vertical insulator set .21 Figure A.2 Test arrangement of vertical insulator set using simplified tower steel structure .22 Figure A.3 Test arrangement of Vee insulator set located in the centre of the tower (for the simplified tower

18、steel structure and return circuit, see Figures A.1 and A.2)23 Figure A.4 Test arrangement of horizontal insulator (for the simplified tower steel structure and return circuit, see Figures A.1 and A.2) .24 Figure D.1 5 kA power arc test of a 145 kV string consisting of 7 cap and pin units.29 Figure

19、F.1 Distribution of arc current (I) and its supply circuit components (I S1 , I S2 ) along a 100 km long, 145 kV line connecting busbars of 28 kA short-circuit current 32 Table 1 Supply and return conditions .9 Table 2 Test series for insulator sets .14 Table 3 Test series for short insulator string

20、s.16 Table 4 Test assessment criteria .19 SANS 61467:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 4 61467 IEC:2008 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ INSULATORS FOR OVERHEAD LINES INSULATOR STRINGS AND SETS FOR LINES WITH A NOM

21、INAL VOLTAGE GREATER THAN 1 000 V AC POWER ARC TESTS 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-operati

22、on 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 “I

23、EC 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, governmental and non- governmental organizations liaising with the IEC also participate in this prepar

24、ation. 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 consen

25、sus 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 international use and are accepted by IEC National Committees in that sense. While all reasonable efforts ar

26、e 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 to promote international uniformity, IEC National Committees undertake to apply IEC Publications tr

27、ansparently 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 clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot

28、 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 attach to IEC or its directors, employees, servants or agents including individual experts and memb

29、ers 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 fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication o

30、r 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 publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication m

31、ay be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61467 has been prepared by subcommittee 36B: Insulators for overhead lines, of IEC technical committee 36: Insulators. This first edition cancels and replac

32、es IEC/TR 61467, which was published as a technical report in 1997. It constitutes a technical revision and now has the status of an International Standard. The text of this standard is based on the following documents: FDIS Report on voting 36B/277/FDIS 36B/280/RVD Full information on the voting fo

33、r the approval of this standard 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. SANS 61467:2009This standard may only be used and printed by approved subscription and freemailing clients of the SA

34、BS.61467 IEC:2008 5 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 specific publication. At this date, the publication will be reconfirmed,

35、withdrawn, replaced by a revised edition, or amended. SANS 61467:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 6 61467 IEC:2008 INSULATORS FOR OVERHEAD LINES INSULATOR STRINGS AND SETS FOR LINES WITH A NOMINAL VOLTAGE GREATER THAN 1 000

36、V AC POWER ARC TESTS 1 Scope and object This International Standard applies to insulator strings and sets comprising string insulator units of ceramic material, glass or composite material for use on a.c. overhead lines and traction lines with a nominal voltage above 1 000 V and a frequency between

37、15 Hz and 100 Hz. This standard also applies to insulator strings or sets of similar design used in substations. This standard establishes a standard test procedure for power arc tests on insulator sets. It also establishes a standard test procedure for power arc tests on short strings. This standar

38、d does not apply to insulator sets mounted on non-metallic poles or towers. This standard cannot be directly applied to line post insulators or sets, or to insulating structures such as braced line-posts, since their mounting arrangement cannot be reproduced by the standard arrangements as described

39、 herein. However, this standard can be used as a basis for agreement for tests on such insulators and arrangements. The object of this standard is to define the terms used, to prescribe a standard test procedure, to prescribe criteria to evaluate the results of the tests. Power arc tests are not an

40、obligatory element of line insulator specifications. The standard test procedures and the evaluation criteria described in this standard are intended to provide testing guidance when power arc tests are felt to be necessary. It is not the object of this standard to introduce a general obligation to

41、execute these tests. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 6

42、0797, Residual strength of string insulator units of glass or ceramic material for overhead lines after mechanical damage of the dielectric IEC 60826, Design criteria of overhead transmission lines 3 Terms and definitions For the purposes of this document, the following terms and definitions apply.

43、NOTE Definitions of other terms used in this standard can be found in IEC 60050-471, IEC 60383-1 and IEC 60383-2. SANS 61467:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS.61467 IEC:2008 7 3.1 test one application of the specified test cur

44、rent for the specified duration to the insulator string or set 3.2 test sequence three successive tests on the same insulator string or set 3.3 test series a group of test sequences used to characterize the power arc performance of an insulator string or set 3.4 per cent initial asymmetry of current

45、 deviation of the current from a symmetrical wave during the first cycle of a power arc NOTE Per cent initial asymmetry is expressed as a function of the absolute peak value of the current of the first cycle (I m ) divided by the r.m.s. value of the current (I) as follows: 100 1 2 m I I3.5 supply ci

46、rcuit electrical connection through which the current of a power arc flows to the line side of the test object from the power source 3.6 return circuit electrical connection through which the current of power arc flows from the earth side of the test object to the power source 3.7 balanced circuit s

47、upply or return circuit in which the current flow is in two diametrically opposed directions 3.8 unbalanced circuit supply or return circuit in which the current flow is principally in one direction 3.9 short string (cap and pin units) string of three to six insulator units having a minimum arcing d

48、istance of 400 mm 3.10 short string (long rod and composite units) string of one or more insulator units having an arcing distance between 400 mm and 1 000 mm 4 Symbols and abbreviations The following symbols and abbreviations are principally used in the tables and figures hereafter. Unless otherwis

49、e stated currents and voltages are expressed as r.m.s values. SANS 61467:2009This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 8 61467 IEC:2008 I Arc current I nSpecified arc current t Arc time t nSpecified arc time I mPeak current value I R1,2Currents in the return circuit I S1,2Currents in the supply circuit I sysRated short-circuit current of the network system L ALength of the insu