1、 INTERNATIONAL STANDARD IEC60068-2-21 Sixth edition2006-06 Environmental testing Part 2-21:Tests Test U:Robustness of terminations and integral mounting devices Reference number IEC 60068-2-21:2006(E)LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK S
2、UPPLY BUREAU.Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series.For example,IEC 34-1 is now referred to as IEC 60034-1.Consolidated editions The IEC is now publishing consolidated versions of its publications.For example,edition number
3、s 1.0,1.1 and 1.2 refer,respectively,to the base publication,the base publication incorporating amendment 1 and the base publication incorporating amendments 1 and 2.Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC,thus ensuri
4、ng that the content reflects current technology.Information relating to this publication,including its validity,is available in the IEC Catalogue of publications(see below)in addition to new editions,amendments and corrigenda.Information on the subjects under consideration and work in progress under
5、taken by the technical committee which has prepared this publication,as well as the list of publications issued,is also available from the following:IEC Web Site(www.iec.ch)Catalogue of IEC publications The on-line catalogue on the IEC web site(www.iec.ch/searchpub)enables you to search by a variety
6、 of criteria including text searches,technical committees and date of publication.On-line information is also available on recently issued publications,withdrawn and replaced publications,as well as corrigenda.IEC Just Published This summary of recently issued publications(www.iec.ch/online_news/jus
7、tpub)is also available by email.Please contact the Customer Service Centre(see below)for further information.Customer Service Centre If you have any questions regarding this publication or need further assistance,please contact the Customer Service Centre:Email:custserviec.ch Tel:+41 22 919 02 11 Fa
8、x:+41 22 919 03 00 LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.INTERNATIONAL STANDARD IEC60068-2-21 Sixth edition2006-06 Environmental testing Part 2-21:Tests Test U:Robustness of terminations and integral mounting devices IEC 2006
9、 Copyright-all rights reserved 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 the publisher.International Electrotechnical Commission,3,rue de Varemb,PO Box 131,CH-
10、1211 Geneva 20,SwitzerlandTelephone:+41 22 919 02 11 Telefax:+41 22 919 03 00 E-mail:inmailiec.ch Web:www.iec.ch U For price,see current cataloguePRICE CODE Commission Electrotechnique InternationaleInternational Electrotechnical Commission LICENSED TO MECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE
11、 AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.2 60068-2-21 IEC:2006(E)CONTENTS FOREWORD.4 1 Scope.6 2 Normative references.6 3 Test Ua1:tensile.7 3.1 Object.7 3.2 General description.7 3.3 Preconditioning.7 3.4 Initial measurements.7 3.5 Test method.7 3.6 Final measurements.8 3.7 Information
12、 to be given in the relevant specification.8 4 Test Ua2:thrust.9 4.1 Object.9 4.2 General description.9 4.3 Preconditioning.9 4.4 Initial measurements.9 4.5 Test method.9 4.6 Final measurements.10 4.7 Information to be given in the relevant specification.10 5 Test Ub:bending.10 5.1 Object.10 5.2 Gen
13、eral description.11 5.3 Preconditioning.11 5.4 Initial measurements.11 5.5 Test method.11 5.6 Final measurements.13 5.7 Information to be given in the relevant specification.14 6 Test Uc:torsion.14 6.1 Object.14 6.2 Preconditioning.14 6.3 Initial measurements.14 6.4 Test method.14 6.5 Final measurem
14、ents.15 6.6 Information to be given in the relevant specification.15 7 Test Ud:torque.15 7.1 Object.15 7.2 General description.15 7.3 Preconditioning.15 7.4 Initial measurements.15 7.5 Test method.16 7.6 Final measurements.16 7.7 Information to be given in the relevant specification.16 LICENSED TO M
15、ECON Limited.-RANCHI/BANGALOREFOR INTERNAL USE AT THIS LOCATION ONLY,SUPPLIED BY BOOK SUPPLY BUREAU.60068-2-21 IEC:2006(E)3 8 Test Ue:robustness of terminations for SMD in the mounted state.17 8.1 Object.17 8.2 General description.17 8.3 Mounting.18 8.4 Initial measurements.19 8.5 Test methods.19 8.
16、6 Final measurements.21 8.7 Information to be given in the relevant specification.22 Figure 1 Clamp for the testing of short terminations.13 Figure 2 Sketches showing direction by arrow heads of application of forces Test Ua1:tensile and test Ua2:thrust.23 Figure 3 Sketches showing test procedure for test Ub:bending(see 5.5.2.1 and 5.5.2.3).24 Figure 4 Diagrams showing test procedure for test Uc:torsion test for wire terminations.25 Figure 5 Example of substrate for test method Ue1(also suitable
