SANS 61109-2008 Insulators for overhead lines - Composite suspension and tension insulators for a c systems with a nominal voltage greater than 1 000 V - Definitions test methods a.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 978-0-626-21795-2 SANS 61109:2008 Edition 2 IEC 61109:2008 Edition 2SOUTH AFRICAN NATIONAL STANDARD Insulators for overhead lines Composite suspensi

4、on and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V Definitions, test methods and acceptance criteria This national standard is the identical implementation of IEC 61109:2008 and is adopted with the permission of the International Electrotechnical Commission. Publi

5、shed by SABS Standards Division 1 Dr Lategan Road Groenkloof 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 61109:2008 Edition 2 IEC 61109:2008 E

6、dition 2 Table of changes Change No. Date Scope National 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 WT

7、O/TBT agreement. This SANS document was published in September 2008. This SANS document supersedes SANS 61109:1992 (edition 1 as modified by IEC amdt 1:1995 and nat. amdt 1:2007). This standard may only be used and printed by approved subscription and freemailing clients of the SABS. IEC 61109 Editi

8、on 2.0 2008-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Insulators for overhead lines Composite suspension and tension insulators for a.c. systems with a nominal voltage greater than 1 000 V Definitions, test methods and acceptance criteria Isolateurs pour lignes ariennes Isolateurs composites de

9、 suspension et dancrage destins aux systmes courant alternatif de tension nominale suprieure 1 000 V Dfinitions, mthodes dessai et critres dacceptation INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE U ICS 29.080.10 PRICE CODE CODE PRIX ISBN 2-8318-9814-5SANS 611

10、09:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 2 61109 IEC:2008 CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope and object7 2 Normative references7 3 Terms, definitions and abbreviations.8 3.1 Terms and definitions 8 3.2 Abbreviations.10 4

11、Identification.10 5 Environmental conditions 10 6 Transport, storage and installation 10 7 Hybrid insulators.10 8 Tolerances .10 9 Classification of tests11 9.1 Design tests 11 9.2 Type tests .11 9.3 Sample tests .11 9.4 Routine tests .11 10 Design tests .12 10.1 General .12 10.2 Test specimens for

12、IEC 62217.13 10.2.1 Tests on interfaces and connections of end fittings.13 10.2.2 Tracking and erosion test.13 10.2.3 Tests on core material .14 10.3 Product specific pre-stressing for IEC 6221714 10.3.1 Sudden load release 14 10.3.2 Thermal-mechanical pre-stress14 10.4 Assembled core load-time test

13、s .14 10.4.1 Test specimens .14 10.4.2 Mechanical load test 15 11 Type tests.15 11.1 Electrical tests.15 11.2 Damage limit proof test and test of the tightness of the interface between end fittings and insulator housing .16 11.2.1 Test specimens .16 11.2.2 Performance of the test16 11.2.3 Evaluation

14、 of the test .17 12 Sample tests.17 12.1 General rules.17 12.2 Verification of dimensions (E1 + E2) 18 12.3 Verification of the end fittings (E2) .18 12.4 Verification of tightness of the interface between end fittings and insulator housing (E2) and of the specified mechanical load, SML (E1).18 12.5

15、 Galvanizing test (E2) .19 12.6 Re-testing procedure .19 13 Routine tests 19 13.1 Mechanical routine test19 SANS 61109:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.61109 IEC:2008 3 13.2 Visual examination 19 Annex A (informative) Princip

16、les of the damage limit, load coordination and testing for composite suspension and tension insulators 21 Annex B (informative) Example of two possible devices for sudden release of load .25 Annex C (informative) Guidance on non-standard mechanical stresses and dynamic mechanical loading of composit

17、e tension/suspension insulators.27 Bibliography29 Figure 1 Thermal-mechanical test.20 Figure A.1 Load-time strength and damage limit of a core assembled with fittings22 Figure A.2 Graphical representation of the relationship of the damage limit to the mechanical characteristics and service loads of

18、an insulator with a 16 mm diameter core 23 Figure A.3 Test loads .24 Figure B.1 Example of possible device 1 for sudden release of load25 Figure B.2 Example of possible device 2 for sudden release of load26 Table 1 Tests to be carried out after design changes 12 Table 2 Design tests 13 Table 3 Mount

19、ing arrangements for electrical tests .16 Table 4 Sample sizes .17 SANS 61109:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 4 61109 IEC:2008 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ INSULATORS FOR OVERHEAD LINES COMPOSITE SUSPENSION A

20、ND TENSION INSULATORS FOR A.C. SYSTEMS WITH A NOMINAL VOLTAGE GREATER THAN 1 000 V DEFINITIONS, TEST METHODS AND ACCEPTANCE CRITERIA FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IE

21、C 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, Technical Reports,

22、 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, governmental and non-

23、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 decisions or agreements of

24、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 international use and are ac

25、cepted 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 to promote internat

26、ional 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 clearly indicated in the

27、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 attach to IEC or it

28、s 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 fees) and expenses

29、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 publication. 9) Attention

30、 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. International Standard IEC 61109 has been prepared by subcommittee 36B: Insulators for overhead lines,

31、of IEC technical committee 36: Insulators. This second edition cancels and replaces the first edition, published in 1992 and amendment 1, published in 1995. This edition constitutes a technical revision. The main technical changes with respect to the previous edition are listed below: removal of tes

32、ts procedures now given in IEC 62217; inclusion of clauses on tolerances, environmental conditions, transport, storage and installation; inclusion of hybrid insulators in the scope (see Clause 8); clarification and modification of the parameters determining the need to repeat design and type tests;

33、SANS 61109:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.61109 IEC:2008 5 general improvement of the description of tests; modification of the specification of load application in bending tests to simplify testing; mechanical tests adapte

34、d to improved knowledge of failure mechanisms; additional requirements for visual examination; Annex A simplified and adapted to include the damage limit concept; addition of a new Annex C on non-standard loads. The text of this standard is based on the following documents: FDIS Report on voting 36B

35、/274/FDIS 36B/276/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. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publicati

36、on 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, withdrawn, replaced by a revised edition, or amended. SANS 61109:2008This standar

37、d may only be used and printed by approved subscription and freemailing clients of the SABS. 6 61109 IEC:2008 INTRODUCTION Composite insulators consist of an insulating core, bearing the mechanical load protected by a polymeric housing, the load being transmitted to the core by end fittings. Despite

38、 these common features, the materials used and the construction details employed by different manufacturers may be quite different. Some tests have been grouped together as “Design tests“, to be performed only once on insulators which satisfy the same design conditions. For all design tests of compo

39、site suspension and tension insulators, the appropriate common clauses defined in IEC 62217 are applied. As far as practical, the influence of time on the electrical and mechanical properties of the components (core material, housing, interfaces etc.) and of the complete composite insulators has bee

40、n considered in specifying the design tests to ensure a satisfactory life-time under normally known stress conditions of transmission lines. An explanation of the principles of the damage limit, load coordination and testing is presented in Annex A. It has not been considered useful to specify a pow

41、er arc test as a mandatory test. The test parameters are manifold and can have very different values depending on the configurations of the network and the supports and on the design of arc-protection devices. The heating effect of power arcs should be considered in the design of metal fittings. Cri

42、tical damage to the metal fittings resulting from the magnitude and duration of the short-circuit current can be avoided by properly designed arc-protection devices. This standard, however, does not exclude the possibility of a power arc test by agreement between the user and manufacturer. IEC 61467

43、 1 1gives details of a.c. power arc testing of insulator sets. Composite insulators are used in both a.c. and d.c. applications. In spite of this fact, a specific tracking and erosion test procedure for d.c. applications as a design test has not yet been defined and accepted. The 1 000 h a.c. tracki

44、ng and erosion test of IEC 62217 is used to establish a minimum requirement for the tracking resistance of the housing material. The mechanism of brittle fracture has been investigated by CIGRE B2.03 2and conclusions are published in 2, 3. Brittle fracture is a result of stress corrosion induced by

45、internal or external acid attack on the resin bonded glass fibre core. CIGRE D1.14 has developed a test procedure for core materials based on time-load tests on assembled cores exposed to acid, along with chemical analysis methods to verify the resistance against acid attack 4. In parallel IEC TC36W

46、G 12 is studying preventive and predictive measures. Composite suspension/tension insulators are not normally intended for torsion or other non- tensile loads. Guidance on non-standard loads is given in Annex C. Wherever possible, IEC Guide 111 5 has been followed for the drafting of this standard.

47、_ 1Figures in square brackets refer to the bibliography. 2International Council on Large High Voltage Electric Systems: Working Group B2.03. SANS 61109:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.61109 IEC:2008 7 INSULATORS FOR OVERHEAD

48、 LINES COMPOSITE SUSPENSION AND TENSION INSULATORS FOR A.C. SYSTEMS WITH A NOMINAL VOLTAGE GREATER THAN 1 000 V DEFINITIONS, TEST METHODS AND ACCEPTANCE CRITERIA 1 Scope and object This International Standard applies to composite suspension/tension insulators consisting of a load-bearing cylindrical

49、 insulating solid core consisting of fibres usually glass in a resin- based matrix, a housing (outside the insulating core) made of polymeric material and end fittings permanently attached to the insulating core. Composite insulators covered by this standard are intended for use as suspension/tension line insulators, but it should be noted that these insulators can occasionally be subjected to compression or bending, for example wh