IEC_60424-5-2009.pdf

IEC 60424-5Edit ion 1.0 2009-02INTER NA TIONA L STA NDA R D Ferrite cores Guide on t he limit s of surface irregularit ies Part 5:Planar-cores IEC 60424-5:2009(E)THIS PUBLICA TION IS COPYRIGHT PROTECTED Copyright 2009 IEC,Geneva,Switzerland All r ights r eserved.Unless other wise 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 per mission in writing fr om either IEC or IECs member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquir y about obtaining additional rights to this publication,please contact the address below or your local IEC member National Committee f or f urther infor mation.IEC Central Of fice 3,rue de Varemb CH-1211 Geneva 20 Switzerland Email:inmailiec.ch Web:w ww.iec.ch A bout the IEC The International Electr otechnical Commission(IEC)is the leading global organization that prepar es and publishes International Standards for all electrical,electronic and related technologies.A bout 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 cor rigenda or an amendment 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to search by a variety of criteria(ref erence number,text,technical committee,).It also gives information on pr ojects,withdrawn and replaced publications.IEC Just Published:www.iec.ch/online_ news/justpub Stay up to date on all new IEC publications.Just Published details twice a month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 containing mor e than 20 000 terms and def initions 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 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 IEC 60424-5Edition 1.0 2009-02INTER NA TIONA L STA NDA R D Ferrit e cores Guide on t he limit s of surface irregularit ies Part 5:Planar-cores INTERNATIONA L ELECTROTECHNICA L COMMISSION NICS 29.100.10 PRICE CODEISBN 2-8318-1032-6 R egistered t r ademark of t he International Electrotechnic al Commission 2 60424-5 IEC:2009(E)CONTENTS FOREWORD.3 1 Scope.5 2 Normative references.5 3 Limits of surface irregularities.6 3.1 Chips and ragged edges.6 3.1.1 Chips and ragged edges on the mating surfaces(see Figures 1,2 and 3).6 3.1.2 Chips and ragged edges on other surfaces.7 3.2 Cracks.10 3.3 Flash.10 3.4 Pull-out.10 Figure 1 Chip location for planar EL-core.6 Figure 2 Chip location for low profile E-core.6 Figure 3 Chip location for low profile ER-core.6 Figure 4 Cracks and pull-out location for planar EL-core.10 Figure 5 Cracks and pull-out location for low profile E-core.11 Figure 6 Cracks and pull-out location for low profile ER-core.11 Figure 7 Reference dimensions for EL-core.11 Figure 8 Reference dimensions for E-core.12 Figure 9 Reference dimensions for ER-core.13 Table 1 Allowable areas of chips in mm2 for planar EL-core.7 Table 2 Allowable areas of chips in mm2 for low profile E-core.8 Table 3 Allowable areas of chips in mm2 for low profile ER-core.8 Table 4 Area and length reference for visual inspection.9 Table 5 Limits of cracks for planar EL-core.12 Table 6 Limits of cracks for low profile E-core.13 Table 7 Limits of cracks for low profile ER-core.14 60424-5 IEC:2009(E)3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FERRITE CORES GUIDE ON THE LIMITS OF SURFACE IRREGULARITIES Part 5:Planar-cores FOREWORD 1)The International Electrotechnical Commission(IEC)is a worldwide organization for standardization comprising all national electrotechnical committees(IEC National Committees).The object of the IEC is to promote international co-operation on all questions 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 Publication(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 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