EN 60424-3:2016
(Main)Ferrite cores - Guidelines on the limits of surface irregularities - Part 3: ETD-cores, EER-cores, EC-cores and E-cores
Ferrite cores - Guidelines on the limits of surface irregularities - Part 3: ETD-cores, EER-cores, EC-cores and E-cores
IEC 60424-3:2015 gives guidelines on allowable limits of surface irregularities applicable to ETD-cores, EER-cores, EC-cores and E-cores in accordance with the relevant general specification. This standard is a specification useful in the negotiations between ferrite core manufacturers and customers about surface irregularities. This edition includes the following significant technical changes with respect to the previous edition: a) addition of allowable areas of chips for EC-cores in Table 3, b) addition of crystallites in 4.5 and pores in 4.6.
Ferritkerne - Leitfaden für Grenzwerte von sichtbaren Beschädigungen der Kernoberfläche - Teil 3: ETD-Kerne, EER-Kerne, EC-Kerne und E-Kerne
Noyaux ferrites - Lignes directrices relatives aux limites des irrégularités de surface - Partie 3: Noyaux ETD, EER, EC et E
L'IEC 60424-3:2015 donne des lignes directrices relatives aux limites admissibles des irrégularités de surface applicables aux noyaux ETD, EER, EC et E, conformément à la spécification générale applicable. La présente norme est une spécification utile aux négociations entre les fabricants de noyaux en ferrite et leurs clients à propos d'irrégularités de surface. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) ajout d'aires admissibles d'éclats pour les noyaux EC dans le Tableau 3, b) ajout de cristallites en 4.5 et de pores en 4.6.
Feritna jedra - Smernica o mejnih vrednostih površinskih nepravilnosti - 3. del: ETD-jedra, EER-jedra, EC-jedra in E-jedra
Ta del standarda IEC 60424 podaja smernice o omejitvah površinskih nepravilnosti, ki veljajo za jedra ETD, EER, EC in E v skladu z ustrezno splošno specifikacijo.
Ta standard je specifikacija, uporabna za sklepanje dogovorov glede površinskih nepravilnosti med proizvajalci feritnih jeder in strankami.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2016
1DGRPHãþD
SIST EN 60424-3:2002
Feritna jedra - Smernica o mejnih vrednostih površinskih nepravilnosti - 3. del:
ETD-jedra, EER-jedra, EC-jedra in E-jedra
Ferrite cores - Guideline on the limits of surface irregularities - Part 3: ETD-cores, EER-
cores, EC-cores and E-cores
Noyaux ferrites - Lignes directrices relatives aux limites des irrégularités de surface -
Partie 3: Noyaux ETD, EER, EC et E
Ta slovenski standard je istoveten z: EN 60424-3:2016
ICS:
29.100.10 Magnetne komponente Magnetic components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 60424-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2016
ICS 29.100.10 Supersedes EN 60424-3:1999
English Version
Ferrite cores - Guidelines on the limits of surface irregularities -
Part 3: ETD-cores, EER-cores, EC-cores and E-cores
(IEC 60424-3:2015)
Noyaux ferrites - Lignes directrices relatives aux limites des Ferritkerne - Leitfaden für Grenzwerte von sichtbaren
irrégularités de surface - Partie 3: Noyaux ETD, EER, Beschädigungen der Kernoberfläche - Teil 3: ETD-Kerne,
EC et E EER-Kerne, EC-Kerne und E-Kerne
(IEC 60424-3:2015) (IEC 60424-3:2015)
This European Standard was approved by CENELEC on 2015-11-26. 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 any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60424-3:2016 E
European foreword
The text of document 51/1099/FDIS, future edition 2 of IEC 60424-3, prepared by
IEC/TC 51 “Magnetic components and ferrite materials" was submitted to the IEC-CENELEC parallel
vote and approved by CENELEC as EN 60424-3:2016.
The following dates are fixed:
(dop) 2016-08-26
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2018-11-26
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60424-3:1999.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 60424-3:2015 was approved by CENELEC as a European
Standard without any modification.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu
Publication Year Title EN/HD Year
1)
IEC 60424-1 2015 Ferrite cores - Guidelines on the limits EN 60424-1 -
of surface irregularities -
Part 1: General Specification
IEC 60647 - Dimensions for magnetic oxide cores - -
intended for use in power supplies
(EC-cores)
IEC 61185 - Ferrite cores (ETD-cores) intended EN 61185 -
for use in power supply applications -
Dimensions
IEC 62317-7 - Ferrite cores - Dimensions - EN 62317-7 -
Part 7: EER-cores
IEC 62317-8 - Ferrite cores - Dimensions - EN 62317-8 -
Part 8: E-cores
1)
To be published.
IEC 60424-3 ®
Edition 2.0 2015-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on the limits of surface irregularities –
Part 3: ETD-cores, EER-cores, EC-cores and E-cores
Noyaux ferrites – Lignes directrices relatives aux limites des irrégularités de
surface –
Partie 3: Noyaux ETD, EER, EC et E
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-2936-1
– 2 – IEC 60424-3:2015 © IEC 2015
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Limits of surface irregularities . 6
4.1 Chips and ragged edges . 6
4.1.1 General . 6
4.1.2 Chips and ragged edges on the mating surfaces . 6
4.1.3 Chips and ragged edges on other surfaces . 6
4.2 Cracks . 11
4.3 Flash . 11
4.4 Pull-outs . 11
4.5 Crystallites . 14
4.6 Pores . 14
Figure 1 – Chip location for ETD-cores, EER-cores and EC-cores . 9
Figure 2 – Chip location for E-cores . 9
Figure 3 – Cracks and pull-out location for ETD-cores, EER-cores and EC-cores . 12
Figure 4 – Cracks and pull-out location for E-cores . 13
Figure 5 – Crystallites location for ETD-cores, EER-cores and EC-cores . 14
Figure 6 – Crystallites location for E-cores . 14
Figure 7 – Pores location for ETD-cores, EER-cores and EC-cores . 15
Figure 8 – Pores location for E-cores . 15
Table 1 – Allowable areas of chips for ETD-cores in mm . 6
Table 2 – Allowable areas of chips for EER-cores in mm . 7
Table 3 – Allowable areas of chips for EC-cores in mm . 7
Table 4 – Allowable areas of chips for E-cores in mm . 8
Table 5 – Area and length reference for visual inspection . 10
Table 6 – Limits for cracks . 13
IEC 60424-3:2015 © IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FERRITE CORES – GUIDELINES ON
THE LIMITS OF SURFACE IRREGULARITIES –
Part 3: ETD-cores, EER-cores, EC-cores and E-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 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 nearly as possible, an international
consensus of opinion 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 ensure 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 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 itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment 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.
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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 publication, 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 possibility 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 60424-3 has been prepared IEC technical committee 51: Magnetic
components and ferrite materials.
This second edition cancels and replaces the first edition published in 1999. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of allowable areas of chips for EC-cores in Table 3,
b) addition of crystallites in 4.5 and pores in 4.6.
– 4 – IEC 60424-3:2015 © IEC 2015
The text of this standard is based on the following documents:
FDIS Report on voting
51/1099/FDIS 51/1114/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 60424 series, published under the general title Ferrite cores –
Guidelines on the limits of surface irregularities, can be found on the IEC website.
Future standards in this series will carry the new general title as cited above. Titles of existing
standards in this series will be updated at the time of the next edition.
The committee has decided that the contents of t
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