IEC 61857-31-2017 Electrical insulation systems - Procedures for thermal evaluation - Part 31 Applications with a designed life of 5000 h or less《电气绝缘系统 热评估规程 第31部分 5000个小时及以下设计寿命应用》.pdf

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1、 IEC 61857-31 Edition 1.0 2017-01 INTERNATIONAL STANDARD Electrical insulation systems Procedures for thermal evaluation Part 31: Applications with a designed life of 5 000 h or less IEC 61857-31:2017-01(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2017 IEC, Geneva, Switzerland All rights r

2、eserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IECs member National Committee in the country of the requester.

3、 If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. IEC Central Office Tel.: +41 22 919 02 11 3, rue de Varemb Fax: +41 22 919 03

4、 00 CH-1211 Geneva 20 infoiec.ch Switzerland www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technic

5、al content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published. IEC Catalogue - webstore.iec.ch/catalogue The stand-alone application for consulting the entire bibliographical informat

6、ion on IEC International Standards, Technical Specifications, Technical Reports and other documents. Available for PC, Mac OS, Android Tablets and iPad. IEC publications search - www.iec.ch/searchpub The advanced search enables to find IEC publications by a variety of criteria (reference number, tex

7、t, technical committee,). It also gives information on projects, replaced and withdrawn publications. IEC Just Published - webstore.iec.ch/justpublished Stay up to date on all new IEC publications. Just Published details all new publications released. Available online and also once a month by email.

8、 Electropedia - www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containing 20 000 terms and definitions in English and French, with equivalent terms in 16 additional languages. Also known as the International Electrotechnical Vocabulary (IEV) online. IEC

9、Glossary - std.iec.ch/glossary 65 000 electrotechnical terminology entries in English and French extracted from the Terms and Definitions clause of IEC publications issued since 2002. Some entries have been collected from earlier publications of IEC TC 37, 77, 86 and CISPR. IEC Customer Service Cent

10、re - webstore.iec.ch/csc If you wish to give us your feedback on this publication or need further assistance, please contact the Customer Service Centre: csciec.ch. IEC 61857-31 Edition 1.0 2017-01 INTERNATIONAL STANDARD Electrical insulation systems Procedures for thermal evaluation Part 31: Applic

11、ations with a designed life of 5 000 h or less INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 29.080.30 ISBN 978-2-8322-3843-1 Registered trademark of the International Electrotechnical Commission Warning! Make sure that you obtained this publication from an authorized distributor. 2 IEC 61857-31:201

12、7 IEC 2017 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normative references 6 3 Terms and definitions 6 4 EIS evaluation . 7 5 Test objects . 7 6 Test procedures 7 6.1 Procedure A: Establishing a TE for applications with a designed life of 1 500 h or less: one-temperature ageing . 7 6.2 Proce

13、dure B: Establishing a TE rating for applications with a designed life of 5 000 h or less: one-temperature ageing . 8 6.3 Procedure C: Establishing a TE rating for applications with a designed life of 5 000 h or less: two-temperature ageing . 8 7 Data analysis . 8 7.1 Analysis Test Procedures A and

14、B (See 6.1 and 6.2) . 8 7.2 Analysis Test Procedure C (See 6.3) . 9 8 Test report . 9 Bibliography 10 IEC 61857-31:2017 IEC 2017 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICAL INSULATION SYSTEMS PROCEDURES FOR THERMAL EVALUATION Part 31: Applications with a designed life of 5 000 h or less

15、 FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in th

16、e electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted

17、to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the Internation

18、al Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each t

19、echnical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC P

20、ublications 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 international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their

21、national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment

22、 services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees,

23、 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 arising out of the publ

24、ication, 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 is drawn to the possib

25、ility 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 61857-31 has been prepared by IEC technical committee 112: Evaluation and qualification of electric

26、al insulating materials and systems. The text of this International Standard is based on the following documents: CDV Report on voting 112/356/CDV 112/375/RVC Full information on the voting for the approval of this International Standard can be found in the report on voting indicated in the above ta

27、ble. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. 4 IEC 61857-31:2017 IEC 2017 A list of all parts in the IEC 61857 series, published under the general title Electrical insulation systems Procedures for thermal evaluation, can be found on the IEC website. The com

28、mittee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific document. At this date, the document will be reconfirmed, withdrawn, replaced by a revised edition, or a

29、mended. A bilingual version of this publication may be issued at a later date. IEC 61857-31:2017 IEC 2017 5 INTRODUCTION IEC 61857-1 provides the general structure to be followed for an electrical insulation system (EIS) evaluation and classification. IEC TR 61857-2 provides guidelines to identify t

30、he application and to select the preferred test method based on the application. This part of IEC 61857 provides a test method for EIS applications, such as the automotive industry, when the designed life is 5 000 h or less. The selection of this test method can be decided by the end product applica

31、tion. 6 IEC 61857-31:2017 IEC 2017 ELECTRICAL INSULATION SYSTEMS PROCEDURES FOR THERMAL EVALUATION Part 31: Applications with a designed life of 5 000 h or less 1 Scope This part of IEC 61857 establishes an EIS evaluation for applications with a designed life of 5 000 h or less. This test method fol

32、lows the procedures of IEC 60505 and is modified based on the range of designed life. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited app

33、lies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60505, Evaluation and qualification of electrical insulation systems IEC 61857-1, Electrical insulation systems Procedures for thermal evaluation Part 1: General requirements Low-volta

34、ge IEC TR 61857-2, Electrical insulation systems Procedures for thermal evaluation Part 2: Selection of the appropriate test method for evaluation and classification of electrical insulation systems IEC 61857-21, Electrical insulation systems Procedures for thermal evaluation Part 21: Specific requi

35、rements for general-purpose models Wire-wound applications IEC 61857-22, Electrical insulation systems Procedures for thermal evaluation Part 22: Specific requirements for encapsulated-coil model Wire-wound electrical insulation system (EIS) 3 Terms and definitions For the purposes of this document,

36、 the terms and definitions given in IEC 61857-1 and the following apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp 3.

37、1 designed life expected application time which is proposed or decided by an end user, an industrial manufacturer, etc., regardless of the duty cycle, continual or intermittent IEC 61857-31:2017 IEC 2017 7 3.2 thermal endurance TE maximum designed temperature for the selected time coordinate 3.3 ave

38、rage life AL mean value of life 4 EIS evaluation Procedure A (see Clause 6) is intended for EIS with a designed life of 1 500 h or less, subjecting one set of test objects to one-temperature ageing at 10 K above the maximum design temperature. The average life of the set under evaluation shall be at

39、 least 1 500 h. Procedure B (see Clause 6) is intended for EIS with a designed life of 5 000 h or less, subjecting one set of test objects to one-temperature ageing at 10 K above the maximum design temperature. The ageing time in Procedure A may be increased up to 5 000 h to correspond to the design

40、ed life of the EIS. The average life of the set under evaluation shall be at least 1 500 h. Procedure C (see Clause 6) is intended for EIS with a designed life of 5 000 h or less, subjecting two sets of test objects to two-temperature ageing at 20 K to 30 K and 30 K to 35 K above the maximum design

41、temperature. The test results determined by either Procedure A, Procedure B or Procedure C described in Clause 6 can be expanded to larger full thermal evaluations in accordance with IEC 61857 (all parts), if the additional thermal ageing is started prior to the completion of the thermal ageing acco

42、rding to this document. When expanded to a full thermal ageing, the work undertaken according to this document is referred to as a screening test portion of the full thermal ageing. Also, IEC 61857-1 and IEC TR 61857-2 may require a reference EIS to be included in the evaluation for establishing a r

43、elative thermal endurance (RTE) rating. When expansion is needed, an evaluation with regard to other applications shall require the addition of a reference EIS in accordance with an EIS method selected from IEC TR 61857-2. 5 Test objects The test objects and test equipment shall be in accordance wit

44、h the appropriate test method selected from IEC TR 61857-2. 6 Test procedures 6.1 Procedure A: Establishing a TE for applications with a designed life of 1 500 h or less: one-temperature ageing Follow the procedures of the selected test method. For the selected test method, one test cycle consists o

45、f: thermal ageing subcycle according to IEC 60505, conditioning subcycle according to IEC TR 61857-2, for example IEC 61857-21 or IEC 61857-22, and diagnostic testing in accordance with the procedures of the test method selected from IEC TR 61857-2. The selected ageing temperature shall be 10 K abov

46、e the maximum design temperature. 8 IEC 61857-31:2017 IEC 2017 The average life of the set under evaluation shall be at least 1 500 h. To accumulate at least 1 500 h prior to the breakdown of the EIS the ageing cycle shall be 168 h. NOTE 168 hours (one week) is used for accumulating more than 1 500

47、ageing hours in nine ageing cycles. If the set of test objects exceeds the original test time of 1 500 h the test may be terminated as the target was achieved or the thermal ageing may be continued to achieve an expanded goal. 6.2 Procedure B: Establishing a TE rating for applications with a designe

48、d life of 5 000 h or less: one-temperature ageing The one-temperature ageing described in Procedure A can be extended to accumulate additional hours. The set undergoing thermal evaluation under Procedure A can be extended to a time coordinate of up to 5 000 h. 6.3 Procedure C: Establishing a TE rati

49、ng for applications with a designed life of 5 000 h or less: two-temperature ageing For these two-temperature ageing applications, the recommendation is for two sets of the candidate EIS test objects to undergo test cycles at each of two elevated ageing temperatures. One test cycle consists of thermal ageing subcycle according to IEC 60505, conditioning subcycle, and diagnostic testing in accordance with the procedures of the test method selected from IEC TR

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