1、Insulators for overhead lines Composite suspension and tension insulators for a.c. systemswith a nominal voltage greaterthan 1 000 V Definitions, testmethods and acceptance criteriaBS EN 61109:2008raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Br
2、itish StandardsNational forewordThis British Standard is the UK implementation of EN 61109:2008. It is identical to IEC 61109:2008.The UK participation in its preparation was entrusted to Technical CommitteePEL/36, Insulators for power systems.A list of organizations represented on this committee ca
3、n be obtained onrequest to its secretary.The attention of users is drawn to the flammability test in Tables 1 and 2 ofBS EN 61109:2008, which references BS EN 62217:2005, and is used as anindicator of power arc ignition and extinction performance. The UKCommittee is of the opinion that work carried
4、out before and after BS EN62217:2005 was published shows that the flammability test is not suitablefor assessing the power arc performance of insulators. The correlationbetween performance in different flammability tests, laboratory power arctests and behaviour in service is currently under investig
5、ation by theInternational Council on Large Electric Systems study committee on Materialsand Emerging Technologies (CIGRE SC D1). When applying this standard,users are recommended to consult the power arc tests in ANSI C29.18 or IEC60099-4 surge arrestor specifications in addition to the test in Tabl
6、es 1 and 2.The ANSI test also usefully includes an end fitting seal test after power arcdamage.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2009ISBN 978 0 580 67052 7ICS 29.080.10BRITISH STANDARDBS EN 6
7、1109:2008Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on Amendments issued since publicationAmd. No. Date Text affectedMarch 200931EUROPEAN STANDARD EN 61109 NORME
8、 EUROPENNE EUROPISCHE NORM October 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitatio
9、n in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61109:2008 E ICS 29.080.10 English version 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 accep
10、tance criteria (IEC 61109:2008) Isolateurs pour lignes ariennes - Isolateurs composites de suspension et dancrage destins aux systmes courant alternatif de tension nominale suprieure 1 000 V - Dfinitions, mthodes dessai et critres dacceptation (CEI 61109:2008) Isolatoren fr Freileitungen - Verbund-H
11、nge- und -Abspannisolatoren fr Wechselstromsysteme mit einer Nennspannung ber 1 000 V - Begriffe, Prfverfahren und Annahmekriterien (IEC 61109:2008) This European Standard was approved by CENELEC on 2008-09-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipu
12、late the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standar
13、d exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national
14、 electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, S
15、witzerland and the United Kingdom. EN 61109:2008 - 2 - Foreword The text of document 36B/274/FDIS, future edition 2 of IEC 61109, prepared by SC 36B, Insulators for overhead lines, of IEC TC 36, Insulators, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61109 on 200
16、8-09-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2009-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-09-01 A
17、nnex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61109:2008 was approved by CENELEC as a European Standard without any modification. _ BS EN 61109:2008- 3 - EN 61109:2008 Annex ZA (normative) Normative references to international publications with th
18、eir corresponding European publications 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. NOTE When
19、 an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60383-1 - 1)Insulators for overhead lines with a nominal voltage above 1 kV - Part 1: Ceramic or glass insulator units for a.c. systems - Def
20、initions, test methods and acceptance criteria EN 60383-1 + A11 1996 2)1999 IEC 60383-2 - 1)Insulators for overhead lines with a nominal voltage above 1 kV - Part 2: Insulator strings and insulator sets for a.c. systems - Definitions, test methods and acceptance criteria EN 60383-2 1995 2)IEC 61466-
21、1 - 1)Composite string insulator units for overhead lines with a nominal voltage greater than 1 kV - Part 1: Standard strength classes and end fittings EN 61466-1 1997 2)IEC 62217 2005 Polymeric insulators for indoor and outdoor use with a nominal voltage 1 000 V - General definitions, test methods
22、and acceptance criteria EN 62217 + corr. December 2006 2006 ISO 3452 Series Non-destructive testing - Penetrant inspection EN ISO 3452 Series 1)Undated reference. 2)Valid edition at date of issue. BS EN 61109:2008 2 61109 IEC:2008 CONTENTS INTRODUCTION.61 Scope and object72 Normative references73 Te
23、rms, 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 Design tests 119.2 Type tests .119.3 Sample tests .119.4 Ro
24、utine 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 pre-stressing for IEC 622171410.3.1 Sudden load release 1410.3
25、.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 between end fittings and insulator housing .1611.2.1 Test sp
26、ecimens .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 the interface between end fittings and insulator housing (E2)
27、 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 test19BS EN 61109:200861109 IEC:2008 3 13.2 Visual examination 19Annex A (informative) Principles of the damage limit, load coordination and testing
28、 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/suspension insulators.27Bibliography29Figure 1
29、 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 with a 16 mm diameter core 23Figure A.3 Test lo
30、ads .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 electrical tests .16Table 4 Sample sizes .17B
31、S EN 61109:2008 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 emplo
32、yed 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 composite suspension and tension insulators, the appropriate common clauses define
33、d 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 been considered in specifying the design tests to ensure a satisfactory life-tim
34、e 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 power arc test as a mandatory test. The test parameters are manifold and can hav
35、e 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. Critical damage to the metal fittings resulting from the magnitude and duration
36、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 11gives details of a.c. power arc testing of insulator sets. Composite insul
37、ators 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. tracking and erosion test of IEC 62217 is used to establish a minimum requirement fo
38、r the tracking resistance of the housing material. The mechanism of brittle fracture has been investigated by CIGRE B2.032and conclusions are published in 2, 3. Brittle fracture is a result of stress corrosion induced by internal or external acid attack on the resin bonded glass fibre core. CIGRE D1
39、.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 TC36WG 12 is studying preventive and predictive measures. Composite suspension/tensi
40、on 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. _1Figures in square brackets refer to the bibliography. 2International Council o
41、n Large High Voltage Electric Systems: Working Group B2.03. BS EN 61109:200861109 IEC:2008 7 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 1 Scope and object Thi
42、s International Standard applies to composite suspension/tension insulators consisting of a load-bearing cylindrical 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 attac
43、hed 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 when used as phase-spacers. This standard can be app
44、lied in part to hybrid composite insulators where the core is made of a homogeneous material (porcelain, resin), see Clause 8. The object of this standard is to define the terms used, prescribe test methods, prescribe acceptance criteria. This standard does not include requirements dealing with the
45、choice of insulators for specific operating conditions. 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 (inclu
46、ding any amendments) applies. IEC 60383-1, Insulators for overhead lines with a nominal voltage above 1 000 V Part 1: Ceramic or glass insulator units for a.c. systems Definitions, test methods and acceptance criteria IEC 60383-2, Insulators for overhead lines with a nominal voltage above 1 000 V Pa
47、rt 2: Insulator strings and insulator sets for a.c. systems Definitions, test methods and acceptance criteria. IEC 61466-1, Composite string insulator units for overhead lines with a nominal voltage greater than 1 000 V Part 1: Standard strength classes and end fittingsIEC 62217:2005, Polymeric insu
48、lators for indoor and outdoor use with a nominal voltage 1 000 V General definitions, test methods and acceptance criteria ISO 3452 (all parts), Non-destructive testing Penetrant testing BS EN 61109:2008 8 61109 IEC:2008 3 Terms, definitions and abbreviations For the purposes of this document, the f
49、ollowing terms, definitions and abbreviations apply. NOTE Certain terms from IEC 62217 are reproduced here for ease of reference. Additional definitions applicable to insulators can be found in IEC 60050-471 6. 3.1 Terms and definitions 3.1.1polymeric insulator insulator whose insulating body consists of at least one organic based material NOTE Polymeric insulators are also known as non-ceramic insulators. NOTE 2 Coupli
