IEC 61109-2008 Insulators for overhead lines - Composite suspension and tension insulators for a.c systems with a nominal voltage greater than 1000 V - Definiti.pdf

1、 IEC 61109Edition 2.0 2008-05INTERNATIONAL STANDARD NORME INTERNATIONALEInsulators 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

2、composites de suspension et dancrage destins aux systmes courant alternatif de tension nominale suprieure 1 000 V Dfinitions, mthodes dessai et critres dacceptation IEC61109:2008THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008 IEC, Geneva, Switzerland All rights reserved. Unless otherwise spec

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17、NAL STANDARD NORME INTERNATIONALEInsulators 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 suspension et dancrage de

18、stins aux systmes courant alternatif de tension nominale suprieure 1 000 V Dfinitions, mthodes dessai et critres dacceptation INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE UICS 29.080.10 PRICE CODECODE PRIXISBN 2-8318-9814-5 2 61109 IEC:2008 CONTENTS FOREWORD.4

19、INTRODUCTION.61 Scope and object72 Normative references73 Terms, definitions and abbreviations .83.1 Terms and definitions 83.2 Abbreviations.104 Identification.105 Environmental conditions 106 Transport, storage and installation 107 Hybrid insulators.108 Tolerances .109 Classification of tests119.1

20、 Design tests 119.2 Type tests .119.3 Sample tests .119.4 Routine tests .1110 Design tests .1210.1 General .1210.2 Test specimens for IEC 62217 .1310.2.1 Tests on interfaces and connections of end fittings.1310.2.2 Tracking and erosion test.1310.2.3 Tests on core material .1410.3 Product specific pr

21、e-stressing for IEC 622171410.3.1 Sudden load release 1410.3.2 Thermal-mechanical pre-stress1410.4 Assembled core load-time tests .1410.4.1 Test specimens .1410.4.2 Mechanical load test 1511 Type tests.1511.1 Electrical tests.1511.2 Damage limit proof test and test of the tightness of the interface

22、between end fittings and insulator housing .1611.2.1 Test specimens .1611.2.2 Performance of the test1611.2.3 Evaluation of the test .1712 Sample tests.1712.1 General rules.1712.2 Verification of dimensions (E1 + E2) 1812.3 Verification of the end fittings (E2) .1812.4 Verification of tightness of t

23、he interface between end fittings and insulator housing (E2) and of the specified mechanical load, SML (E1).1812.5 Galvanizing test (E2) .1912.6 Re-testing procedure .1913 Routine tests 1913.1 Mechanical routine test1961109 IEC:2008 3 13.2 Visual examination 19Annex A (informative) Principles of the

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

25、spension insulators.27Bibliography29Figure 1 Thermal-mechanical test.20Figure A.1 Load-time strength and damage limit of a core assembled with fittings22Figure A.2 Graphical representation of the relationship of the damage limit to the mechanical characteristics and service loads of an insulator wit

26、h a 16 mm diameter core 23Figure A.3 Test loads .24Figure B.1 Example of possible device 1 for sudden release of load25Figure B.2 Example of possible device 2 for sudden release of load26Table 1 Tests to be carried out after design changes 12Table 2 Design tests 13Table 3 Mounting arrangements for e

27、lectrical tests .16Table 4 Sample sizes .17 4 61109 IEC:2008 INTERNATIONAL ELECTROTECHNICAL COMMISSION _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 FOREWORD 1)

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37、ive 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 may be the subject of patent rights. IEC shall not be held respons

38、ible for identifying any or all such patent rights. International Standard IEC 61109 has been prepared by subcommittee 36B: Insulators for overhead lines, of IEC technical committee 36: Insulators. This second edition cancels and replaces the first edition, published in 1992 and amendment 1, publish

39、ed in 1995. This edition constitutes a technical revision. The main technical changes with respect to the previous edition are listed below: removal of tests procedures now given in IEC 62217; inclusion of clauses on tolerances, environmental conditions, transport, storage and installation; inclusio

40、n of hybrid insulators in the scope (see Clause 8); clarification and modification of the parameters determining the need to repeat design and type tests; 61109 IEC:2008 5 general improvement of the description of tests; modification of the specification of load application in bending tests to simpl

41、ify testing; mechanical tests adapted 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

42、documents: FDIS Report on voting 36B/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

43、 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, withdrawn, replaced by a revised edition, or

44、amended. 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 these common features, the materials used and the construction details employed by

45、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 composite suspension and tension insulators, the appropriate common clauses defined in IE

46、C 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 been considered in specifying the design tests to ensure a satisfactory life-time under

47、 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 power arc test as a mandatory test. The test parameters are manifold and can have very

48、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. Critical damage to the metal fittings resulting from the magnitude and duration of the

49、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 11gives 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,