IEC-TS-61251-2008.pdf
《IEC-TS-61251-2008.pdf》由会员分享,可在线阅读,更多相关《IEC-TS-61251-2008.pdf(24页珍藏版)》请在三一文库上搜索。
1、 IEC/TS 61251 Edition 2.0 2008-05 TECHNICAL SPECIFICATION Electrical insulating materials A.C. voltage endurance evaluation Introduction IEC/TS 61251:2008(E) Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Boeing Co/5910770001 Not for Resale, 07/25/
2、2008 01:57:37 MDTNo reproduction or networking permitted without license from IHS -,-,- THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any mea
3、ns, 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. If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
4、 please contact the address below or your local IEC member National Committee for further information. IEC Central Office 3, rue de Varemb CH-1211 Geneva 20 Switzerland Email: inmailiec.ch Web: www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organiz
5、ation that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical 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 amendmen
6、t might have been published. ? Catalogue of IEC publications: www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,). It also gives information on projects, withdrawn and replaced publications. ? IEC Just Published
7、: www.iec.ch/online_news/justpub Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available on-line and also by email. ? Electropedia: www.electropedia.org The worlds leading online dictionary of electronic and electrical terms containi
8、ng more than 20 000 terms and definitions in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical Vocabulary online. ? Customer Service Centre: www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need
9、 further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csciec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Boeing Co/5910770001 Not for Resale, 07/25/2008 01:57:37 M
10、DTNo reproduction or networking permitted without license from IHS -,-,- IEC/TS 61251 Edition 2.0 2008-05 TECHNICAL SPECIFICATION Electrical insulating materials A.C. voltage endurance evaluation Introduction INTERNATIONAL ELECTROTECHNICAL COMMISSION R ICS 29.035.01; 17.220.99 PRICE CODE ISBN 2-8318
11、-9777-7 Copyright International Electrotechnical Commission Provided by IHS under license with IECLicensee=Boeing Co/5910770001 Not for Resale, 07/25/2008 01:57:37 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 TS 61251 IEC:2008(E) CONTENTS FOREWORD.3 1 Scope and object5
12、 2 Normative references .5 3 Terms and definitions .5 4 Voltage endurance .7 4.1 Voltage endurance testing.7 4.2 Electrical stress.7 4.3 Voltage endurance (VE) graph 7 4.4 Short-time electric strength .8 4.5 Voltage endurance coefficient (VEC) n .8 4.6 Differential VEC (nd) .8 4.7 Electrical thresho
13、ld stress (Et).9 4.8 Voltage endurance relationship .9 5 Test methods .10 5.1 Introductory remark .10 5.2 Tests at constant stress 11 5.2.1 Conventional VE test .11 5.2.2 Diagnostic measurements11 5.2.3 Detection of an electrical threshold12 5.3 Tests at higher frequency12 5.4 Progressive stress tes
14、ts 13 5.5 Preliminary tests to determine the initial part of the VE line .14 5.6 Suggested test method14 6 Evaluation of voltage endurance.15 6.1 Significance of the VEC.15 6.2 Significance of the electrical threshold stress 15 6.3 Dispersion of data and precision requirements 15 6.4 Presentation of
15、 the results.16 Annex A (informative) The Weibull distribution.17 Bibliography19 Figure 1 General voltage endurance line8 Figure 2 Determination of the differential VEC nd at a generic point P of the VE line 9 Figure 3 Plotting the VE line with progressive stress13 Copyright International Electrotec
16、hnical Commission Provided by IHS under license with IECLicensee=Boeing Co/5910770001 Not for Resale, 07/25/2008 01:57:37 MDTNo reproduction or networking permitted without license from IHS -,-,- TS 61251 IEC:2008(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICAL INSULATING MATERIALS A.C.
17、VOLTAGE ENDURANCE EVALUATION INTRODUCTION 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 q
18、uestions concerning standardization in the 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 Publicat
19、ion(s)”). Their preparation is entrusted 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
20、collaborates closely with the International 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 opin
21、ion on the relevant subjects since each technical 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 e
22、nsure that the technical content of IEC Publications 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
23、 to the maximum extent possible in their 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 provides no marking procedure to indicate its approval and cannot be rendere
24、d responsible for any equipment declared to be in conformity with an IEC Publication. 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, servants or agents including individual experts and members of its
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- IEC TS 61251 2008
链接地址:https://www.31doc.com/p-3771624.html