《BS-EN-61858-2005.pdf》由会员分享，可在线阅读，更多相关《BS-EN-61858-2005.pdf（20页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 61858:2005 Electrical insulation systems Thermal evaluation of modifications to an established wire-wound EIS The European Standard EN 61858:2005 has the status of a British Standard ICS 29.080.30 ? Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:30:55 GMT+00:00 2006
2、, Uncontrolled Copy, (c) BSI BS EN 61858:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 11 April 2005 BSI 11 April 2005 ISBN 0 580 45815 6 National foreword This British Standard is the official English language version of EN 61858:2005
3、. It is identical with IEC 61858 Ed.2:2004. It supersedes BS EN 61858:2000 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GEL/98, Electrical insulation systems, which has the responsibility to: A list of organizations represented on this committee ca
4、n be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search”
5、facility of the BSI Electronic Catalogue or of British Standards Online. 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 does not of itself confer immunity from legal obliga
6、tions. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of
7、 pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 17 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldu
8、n sheffieldun, na, Fri Nov 10 07:30:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 61858 NORME EUROPENNE EUROPISCHE NORM March 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechni
9、sche Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61858:2005 E ICS 29.080.30 Supersedes EN 61858:2000 English version Electrical insulation systems Thermal
10、 evaluation of modifications to an established wire-wound EIS (IEC 61858:2004) Systmes disolation lectrique - Evaluation thermique des modifications apportes un systme disolation lectrique prouv enroulements fil (CEI 61858:2004) Elektrische Isoliersysteme Thermische Bewertung von Vernderungen an ein
11、em erprobten, drahtgewickelten EIS (IEC 61858:2004) This European Standard was approved by CENELEC on 2005-02-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without a
12、ny 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 version in any other language ma
13、de 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, Czech Republic, Denmark, Estonia, Finla
14、nd, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:30:55 GMT+00:00 2006, Uncontrolled
15、Copy, (c) BSI EN 65812:8500 - - 2 Foreword The text of document 98/221/FDIS, future edition 2 of IEC 61858, prepared by IEC TC 98, Electrical insulation systems (EIS), was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61858 on 2005-02-01. This European Standard superse
16、des EN 61858:2000. It constitutes a technical revision that incorporates test procedures referenced in EN 60034-18-22. 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) 2005-11-
17、01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2008-02-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61858:2004 was approved by CENELEC as a European Standard without any modification. _ Page
18、2 EN 61858:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:30:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6581 8 EI:C0024 3 CONTENTS INTRODUCTION.4 1 Scope.5 2 Normative references .5 3 Terms and definitions .6 4 General considerations.6 5 Evaluation of the change of thickness of an
19、 EIM.8 5.1 Samples8 5.2 Acceptance .8 6 Substitution of winding wire 8 6.1 General.8 6.2 Substitution of enamel.8 6.3 Substitution of conductor material .8 6.4 Alternate winding wire .9 7 Substitution of impregnating resin/varnish 9 7.1 Thermal class determination9 7.2 Evaluation .9 8 Substitution w
20、ith other EIM.10 8.1 Technically equivalent materials10 8.2 Previous evaluation.10 8.3 Other.10 9 Evaluation of additions .10 9.1 Addition of an impregnating resin/varnish10 9.2 Addition of other components 11 10 Single-point thermal ageing test .11 10.1 Test objects.11 10.2 Establishing the relativ
21、e thermal endurance index (RTE).11 10.3 Interpretation of results .12 Annex A (normative) Classes of winding wire.13 Annex B (normative) Compatibility test procedure14 Annex ZA (normative) Normative references to international publications with their corresponding European publications17 Figure 1 Ov
22、erview of evaluation methods.7 Table 1 Thermal ageing test methods for resin/varnishes.9 Table A.1 Winding wire types.13 Page 3 EN 61858:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:30:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6581 8 EI:C0024 4 INTRODUCTION This International S
23、tandard describes procedures for the evaluation of changes to an established electrical insulation system (EIS) for wire-wound electrotechnical devices and the effect of these changes on the thermal classification of the established EIS. General principles for evaluation and qualification of EIS can
24、 be found in IEC 60505. Unless the procedures of this standard indicate otherwise, the principles of IEC 60505 should be followed. The thermal classification of an EIS is established either by known service life, in accordance with IEC 60791, or evaluated in accordance with IEC 61857 (all parts). Pa
25、ge 4 EN 61858:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:30:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6581 8 EI:C0024 5 ELECTRICAL INSULATION SYSTEMS THERMAL EVALUATION OF MODIFICATIONS TO AN ESTABLISHED WIRE-WOUND EIS 1 Scope This International Standard lists the required te
26、st procedures for qualification of modifications of an established electrical insulation system (EIS) with respect to its thermal classification. This standard is applicable to EIS used in wire-wound electrotechnical devices. The test procedures are comparative in that the performance of a candidate
27、 EIS is compared to that of a reference EIS, which has proven service experience in accordance with IEC 60791 or has been evaluated by one of the procedures given in the IEC 61857 series. 2 Normative references The following referenced documents are indispensable for the application of this document
28、. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60172, Test procedure for the determination of the temperature index of enamelled winding wires IEC 60216-5, Electrical insulating mat
29、erials Thermal endurance properties Part 5: Determination of relative thermal endurance index (RTE) of an insulating material IEC 60317, Specifications for particular types of winding wires NOTE Annex A cites several parts relating to the IEC 60317 series. IEC 60505, Evaluation and qualification of
30、electrical insulation systems IEC 60791, Performance evaluation of insulation systems based on service experience and functional tests IEC 61033, Test methods for the determination of bond strength of impregnating agents to an enamelled wire substrate IEC 61857 (all parts), Electrical insulation sys
31、tems Procedures for thermal evaluation IEC 61857-1, Electrical insulation systems Procedures for thermal evaluation Part 1: General requirements Low voltage IEC 62114, Electrical insulation systems (EIS) Thermal classification Page 5 EN 61858:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov
32、10 07:30:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6581 8 EI:C0024 6 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 electrical insulation system (EIS) insulating structure containing one or more electrical insulating materials (EIM) toge
33、ther with associated conducting parts employed in an electrotechnical device 3.2 electrical insulating material (EIM) material with negligibly low electric conductivity, used to separate conducting parts at different electrical potentials 4 General considerations This standard provides relatively lo
34、w cost and short-time methods by which the user can make modifications to an established EIS by evaluating a) the impact on the thermal life of the EIS if the thickness of an EIM is changed, b) the compatibility, under thermal stress, of a substituted EIM, c) the compatibility, under thermal stress,
35、 of other components used in intimate contact with an established EIS. EIM having different temperature indices (ATE/RTE) according to IEC 60216-5 may be combined to form an EIS having a thermal class that may be higher or lower than that of any of the individual components according to IEC 60505. T
36、here may be more than one EIS in a particular apparatus. These EIS may have different thermal classes. The following overview (Figure 1) is a flow chart for guidance in selecting the proper clauses for evaluation. Page 6 EN 61858:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:30:55 G
37、MT+00:00 2006, Uncontrolled Copy, (c) BSI 6581 8 EI:C0024 7 Established EIS per IEC 60791 or IEC 61857-1 EIM modification of established EISEvaluation of additions to established EIS Change of thickness (5) Substitution of EIM component Impregnating resin/varnish (7) Other EIM(8) Winding Wire (6) Co
38、mpare thermal classes (7.1) Substitution allowed? (8.2) Substitution allowed? (8.1) Substitution allowed? (6.1) Equal or greater than? Test per Annex B Acceptable results? Single temperature aging test (10) Acceptable results? Modified EIS is acceptable Test as new EIS according to IEC 61857-1 Addit
39、ion of impregnating resin/ varnish (9.1) Addition of other components (9.2) Acceptable? per IEC 60172 Test per Annex B Acceptable results? Can use in EIS Can not use in EIS Yes Yes No Yes No Yes No No Yes No Yes No No Yes No Yes IEC 1473/04 Figure 1 Overview of evaluation methods Page 7 EN 61858:200
40、5 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:30:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6581 8 EI:C0024 8 5 Evaluation of the change of thickness of an EIM 5.1 Samples Representative samples of the established EIS (the reference EIS) and of the EIS with reduced EIM thickness(es)
41、 (the candidate EIS) shall be evaluated in accordance with Clause 10. 5.2 Acceptance A candidate EIS that meets the acceptance criteria according to Clause 10 shall be assigned the same thermal class as the established EIS. If the results of the candidate EIS testing are outside the acceptance crite
42、ria according to Clause 10, then full thermal ageing in accordance with IEC 61857-1 shall be conducted in order to establish its thermal class. NOTE Full thermal ageing may be accomplished by testing at additional temperatures, according to IEC 61857-1. 6 Substitution of winding wire 6.1 General Sub
43、stitution of a winding wire evaluated in the established EIS can be made without additional testing when one or more of the following conditions have been met: a) the winding wire conforms to an IEC 60317 specification having the same chemical composition, according to the Annex A groupings, as the
44、winding wire evaluated in the established EIS but is of a different size or shape; b) the winding wire conforms to an IEC 60317 specification having the same chemical composition, according to the Annex A groupings, as the winding wire evaluated in the established EIS and has an equal or higher ther
45、mal class; c) the winding wire is a bare conductor insulated with one of the EIM evaluated as part of the established EIS in accordance with IEC 61857-1. The thickness to be used shall be such that the electrical stress per unit thickness is not greater than the stress to which the EIM was subjected
46、 during the ageing test. NOTE For substitution of an alternate EIM, refer to Clause 8. 6.2 Substitution of enamel For chemical composition substitution criteria, refer to Annex A. 6.3 Substitution of conductor material An established EIS, which has been evaluated with copper as the conductor, may us
47、e either copper or aluminium conductor. Page 8 EN 61858:2005 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 10 07:30:55 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6581 8 EI:C0024 9 An established EIS, which has been evaluated with aluminium as the conductor, may use either aluminium or copper c
48、onductor, provided the thermal performance of the substitute winding wire has been established to be equal to or better than the winding wire evaluated. 6.4 Alternate winding wire Winding wires that do not meet the criteria in 6.1 or 6.2 shall be evaluated in accordance with IEC 61857-1. Examples wo
49、uld include either bondable winding wire, conductor insulated with an EIM not included in the established EIS, or lead wire used as an alternate winding wire. 7 Substitution of impregnating resin/varnish 7.1 Thermal class determination The thermal classes of both the candidate resin/varnish and the resin/varnish used in the established EIS shall be determined by comparison of the manufacturers t