1、BRITISH STANDARDBS EN 62231:2006Composite station post insulators for substations with a.c. voltages greater than 1 000 V up to 245 kV Definitions, test methods and acceptance criteriaThe European Standard EN 62231:2006 has the status of a British StandardICS 29.080.10g49g50g3g38g50g51g60g44g49g42g3
2、g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 62231:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 20
3、07 BSI 2007ISBN 978 0 580 50841 7National forewordThis British Standard was published by BSI. It is the UK implementation of EN 62231:2006. It is identical with IEC 62231:2006.The UK participation in its preparation was entrusted to Technical Committee PEL/36, Insulators for power systems.A list of
4、organizations represented on this committee can be obtained on request to its secretary.The attention of users is drawn to the flammability test clause 8.4 in BS EN 62231:2007, which references BS EN 62217:2006 and is used as an indicator of power arc ignition and extinction performance. The UK Comm
5、ittee is of the opinion that work carried out before and after BS EN 62217:2005 was published shows that the flammability test is not suitable for assessing the power arc performance of insulators. The correlation between performance in different flammability tests, laboratory power arc tests and be
6、haviour in service is currently under investigation by CIGRE SC D1. When applying this standard, users are recommended to consult the power arc tests in ANSI C29.18 or IEC 99-4 surge arrestor specifications in addition to the test in BS EN 62217:2006. The ANSI test also usefully includes an end fitt
7、ing seal test after power arc damage.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publicationAmd. No
8、. Date CommentsEUROPEAN STANDARD EN 62231 NORME EUROPENNE EUROPISCHE NORM December 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 B
9、russels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62231:2006 E ICS 29.080.10 English version Composite station post insulators for substations with a.c. voltages greater than 1 000 V up to 245 kV - Definitions, test met
10、hods and acceptance criteria (IEC 62231:2006) Isolateurs supports composites rigides socle destins aux postes courant alternatif de tensions suprieures 1 000 V jusqu 245 kV - Dfinitions, mthodes dessai et critres dacceptation (CEI 62231:2006) Verbundsttzisolatoren fr Unterwerke fr Wechselspannung gr
11、er 1 kV bis 245 kV - Definitionen, Prfmethoden und Annahmekriterien (IEC 62231:2006) This European Standard was approved by CENELEC on 2006-09-12. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
12、 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 Standard exists in three official versions (English, French, German). A
13、 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 electrotechnical committees of Austria, Belgium, Cyprus, the Cz
14、ech 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, Switzerland and the United Kingdom. EN 62231:2006 2 Foreword The text of do
15、cument 36C/159/FDIS, future edition 1 of IEC 62231, prepared by SC 36C, Insulators for substations, of IEC TC 36, Insulators, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 62231 on 2006-09-12. This standard is to be used in conjunction with EN 62217:2006, Polymeric
16、 insulators for indoor and outdoor use with a nominal voltage 1 000 V - General definitions, test methods and acceptance criteria. 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 (d
17、op) 2007-07-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-10-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 62231:2006 was approved by CENELEC as a European Standard without any modificat
18、ion. _ 3 EN 62231:2006 CONTENTS INTRODUCTION.5 1 Scope and object7 2 Normative references .7 3 Terms and definitions .8 4 Identification.11 5 Environmental conditions12 6 Information on transport, storage and installation 12 7 Classification of tests12 7.1 Design tests 12 7.2 Type tests .14 7.3 Samp
19、le tests .14 7.4 Routine tests .14 8 Design tests .14 8.1 General .14 8.2 Tests on interfaces and connections of end fittings.15 8.3 Assembled core load tests .15 8.4 Tests on shed and housing material.18 8.5 Tests on the core material .18 9 Type tests 18 9.1 Verification of dimensions 18 9.2 Electr
20、ical tests.18 9.3 Mechanical tests20 10 Sample tests 22 10.1 General rules.22 10.2 Verification of dimensions (E1 + E2) 22 10.3 Galvanizing test (E1 + E2) .22 10.4 Verification of the specified mechanical loads (E1) .23 10.5 Re-testing procedure .23 11 Routine tests 24 11.1 Identification of the sta
21、tion post insulator .24 11.2 Visual examination 24 11.3 Tensile load test 24 Annex A (informative) Notes on the mechanical loads and tests26 Annex B (informative) Determination of the equivalent bending moment caused by combined cantilever and compression (tension) loads28 Annex C (informative) Exam
22、ple of torsion load test arrangement.30 Annex D (normative) Tolerances of form and position .31 Annex E (informative) Notes on the compression and buckling test .34 Annex ZA (normative) Normative references to international publications with their corresponding European publications36 Bibliography .
23、35 EN 62231:2006 4 Figure 1 Thermal-mechanical pre-stressing test Typical cycles 25 Figure B.1 Combined loads applied to station post insulators29 Figure D.1 Parallelism, coaxiality and concentricity.31 Figure D.2 Angular deviation of fixing holes: Example 132 Figure D.3 Angular deviation of fixing
24、holes: Example 232 Figure D.4 Tolerances according to standard drawing practice33 Table 1 Tests to be carried out after design changes 13 Table 2 Number of samples for sample tests 22 5 EN 62231:2006 INTRODUCTION Composite station post insulators consist of a cylindrical solid insulating core made o
25、f resin impregnated fibres, bearing the mechanical load, protected by an elastomer housing, the loads being transmitted to the core by metal fittings. Despite these common features, the materials used and the construction details employed by different manufacturers may be different. Some tests have
26、been grouped together as “design tests“ to be performed only once for insulators of the same design. The design tests are performed in order to eliminate insulator designs, materials and manufacturing technologies not suitable for high-voltage applications. The influence of time on the electrical an
27、d mechanical properties of the complete composite station post insulator and its components (core material, housing material, interfaces, etc.) has been considered in specifying the design tests in order to ensure a satisfactory lifetime under normal service conditions. The approach for mechanical t
28、esting under bending loads used in this Standard is based on IEC 61952. This approach uses the concept of a damage limit that is the maximum stress that can be developed in the insulator before damage begins to occur. Work is underway to validate the acoustic emission technique to determine the ince
29、ption of damage. In some cases, station post insulators can be subjected to a combination of loads. In order to give some guidance, Annex B explains how to calculate the equivalent bending moment in the insulators resulting from the combination of bending, tensile and compression loads. Pollution te
30、sts, as specified in IEC 60507 and IEC 61245, are not included in this document, their applicability to composite station post insulators having not been proven. Such pollution tests performed on composite insulators do not correlate with experience obtained from service. Specific pollution tests fo
31、r composite insulators are under consideration. 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 different values depending on the configurations of the network and the supports and on the design of arc-protection d
32、evices. 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 short-circuit current can be avoided by properly designed arc-protection devices. This standard, however, does not ex
33、clude the possibility of a power arc test by agreement between the user and the manu-facturer. IEC 61467 gives details of a.c. power arc testing of insulator sets. Impulse (mechanical) loads in substation are typically caused by short-circuits. Post insulators are affected by forces due to the inter
34、action of the currents circulating in conductors/busbars supported by insulators. The impulse load or peak load may be evaluated using guidance found in the IEC 60865 series. EN 62231:2006 6 Work is in progress in CIGRE ESCC (Effects of Short-Circuit Currents) task force to review impulse loads caus
35、ed by short-circuit currents in substations. The aim of this work is to introduce a new concept: the ESL factor (Equivalent Static Load factor) which is frequency dependent. The actual peak load may be replaced, in a first approximation, by the peak load times the ESL factor. This new value may be u
36、sed as the MDCL in this document for the determination of the cantilever strength. Radio interference and corona tests are not specified in this standard since the radio interference and corona performances are not characteristics of the insulator alone. Composite hollow core station post insulators
37、 are currently not dealt with in this standard. IEC 61462 gives details of tests on hollow core composite insulators, many of which can be applied to such station post insulators. 7 EN 62231:2006 COMPOSITE STATION POST INSULATORS FOR SUBSTATIONS WITH AC VOLTAGES GREATER THAN 1 000 V UP TO 245 kV DEF
38、INITIONS, TEST METHODS AND ACCEPTANCE CRITERIA 1 Scope and object This International Standard applies to composite station post insulators consisting of a load bearing cylindrical insulating solid core made of resin impregnated fibres, a housing (outside the insulating solid core) made of elastomer
39、material (e.g. silicone or ethylene-propylene) and end fittings attached to the insulating core. Composite station post insulators covered by this standard are subjected to cantilever, torsion, tension and compression loads. They are intended for substations with a.c. voltages greater than 1 000 V u
40、p to 245 kV. The object of this standard is to define the terms used, to prescribe test methods, to prescribe acceptance or failure criteria. This standard does not include requirements dealing with the choice of insulators for specific operating conditions. 2 Normative references The following refe
41、renced 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 60050-471, International Electrotechnical Vocabulary (IEV) Chap
42、ter 471: Insulators IEC 60060-1, High-voltage test techniques Part 1: General definitions and test requirements IEC 60168:1994, Tests on indoor and outdoor post insulators of ceramic material or glass for systems with nominal voltages greater than 1 000 V IEC 62217, Polymeric insulators for indoor a
43、nd outdoor use with a nominal voltage greater than 1000 V General definitions, test methods and acceptance criteria ISO 1101, Technical drawings Geometrical tolerancing Tolerancing of form, orientation, location and run-out Generalities, definitions, symbols, indications on drawings ISO 3452, Non-de
44、structive testing Penetrant inspection General principles EN 62231:2006 8 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 composite station post insulator post insulator consisting of a solid load bearing cylindrical insulating core, a housin
45、g and end fittings attached to the insulating core 3.2 core (of an insulator) central insulating part of an insulator which provides the mechanical characteristics NOTE The housing and sheds are not part of the core. IEV 471-01-03 3.3 housing external insulating part of composite insulator providing
46、 necessary creepage distance and protecting core from environment NOTE An intermediate sheath made of insulating material may be part of the housing. IEV 471-01-09 3.4 housing profile shape and dimensions of the housing of the composite station post insulator which include the following: shed overha
47、ng(s) shed thickness at the base and at the tip shed spacing shed repetition shed inclination(s) 3.5 shed (of an insulator) insulating part, projecting from the insulator trunk, intended to increase the creepage distance. The shed can be with or without ribs IEV 471-01-15 3.6 insulator trunk central
48、 insulating part of an insulator from which the sheds project NOTE Also known as shank on smaller insulators. IEV 471-01-11 3.7 creepage distance shortest distance or the sum of the shortest distances along the surface on an insulator between two conductive parts which normally have the operating vo
49、ltage between them NOTE 1 The surface of cement or of any other non-insulating jointing material is not considered as forming part of the creepage distance. 9 EN 62231:2006 NOTE 2 If a high resistance coating is applied to parts of the insulating part of an insulator, such parts are considered to be effective insulating surfaces and the distance over them is included in the creepage distance. IEV 471-01-04 3.8 arcing distance shortest distance in
