SIST EN 60424-2:2016

Ferrite cores - Guidelines on the limits of surface irregularities - Part 2: RM-cores

This part of IEC 60424 provides guidelines on the allowable limits of surface irregularities
applicable to RM-cores in accordance with the relevant generic specification.
This standard should be considered as a sectional specification useful in the negotiations
between ferrite core manufacturers and customers about surface irregularities. Normative
reference

Ferritkerne - Leitfaden für Grenzwerte von sichtbaren Beschädigungen der Kernoberfläche - Teil 2: RM-Kerne

Noyaux ferrites - Lignes directrices relatives aux limites des irrégularités de surface - Partie 2: Noyaux RM

L'IEC 60424-2:2015 fournit des lignes directrices sur les limites admissibles des irrégularités de surface applicables aux noyaux RM conformément à la spécification générique applicable. Il convient de considérer la présente norme comme une spécification intermédiaire utile dans les négociations entre les fabricants de noyaux en ferrite et leurs clients sur les irrégularités de surface. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajout de cristallites en 3.6 et de pores en 3.7.

Feritna jedra - Smernice o mejnih vrednostih površinskih nepravilnosti - 2. del: RM-jedra

Ta del standarda IEC 60424 podaja smernice o dovoljenih mejnih vrednostih površinskih nepravilnosti, ki se uporabljajo za RM-jedra v skladu z ustrezno splošno specifikacijo. Ta standard naj bi se obravnaval kot področna specifikacija, uporabna za sklepanje dogovorov glede površinskih nepravilnosti med proizvajalci feritnih jeder in strankami. Zveza z drugim standardom.

General Information

• Status: Withdrawn
• Publication Date: 16-May-2016
• Withdrawal Date: 15-May-2022
• ICS: 29.100.10 - Magnetic components
• Technical Committee: IMKF - Magnetic components and ferrite materials
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 16-May-2022
• Due Date: 08-Jun-2022
• Completion Date: 16-May-2022
• Ref Project: EN 60424-2:2016 - Ferrite cores - Guidelines on the limits of surface irregularities - Part 2: RM-cores

Relations

• Replaced By: SIST EN IEC 63093-4:2019 - Ferrite cores - Guidelines on dimensions and the limits of surface irregularities - Part 4: RM-cores (IEC 63093-4:2019)
• Effective Date: 07-Jun-2022
• Replaces: SIST EN 60424-2:2002 - Guidance of the limits of surface irregularities of ferrite cores -- Part 2: RM-cores
• Effective Date: 01-Jun-2016

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60424-2:2016
01-junij-2016
1DGRPHãþD
SIST EN 60424-2:2002
Feritna jedra - Smernice o mejnih vrednostih površinskih nepravilnosti - 2. del: RM
-jedra
Ferrite cores - Guidelines on the limits of surface irregularities - Part 2: RM-cores
Noyaux ferrites - Lignes directrices relatives aux limites des irrégularités de surface -
Partie 2: Noyaux RM
Ta slovenski standard je istoveten z: EN 60424-2:2016
ICS:
29.100.10 Magnetne komponente Magnetic components
SIST EN 60424-2:2016 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60424-2:2016

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SIST EN 60424-2:2016


EUROPEAN STANDARD EN 60424-2

NORME EUROPÉENNE

EUROPÄISCHE NORM
March 2016
ICS 29.100.10 Supersedes EN 60424-2:1997
English Version
Ferrite cores - Guidelines on the limits of surface irregularities -
Part 2: RM-cores
(IEC 60424-2:2015)
Noyaux ferrites - Lignes directrices relatives aux limites des Ferritkerne - Leitfaden für Grenzwerte von sichtbaren
irrégularités de surface - Beschädigungen der Kernoberfläche -
Partie 2: Noyaux RM Teil 2: RM-Kerne
(IEC 60424-2:2015) (IEC 60424-2:2015)
This European Standard was approved by CENELEC on 2016-01-08. 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 60424-2:2016 E

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SIST EN 60424-2:2016
EN 60424-2:2016
European foreword
The text of document 51/1108/FDIS, future edition 2 of IEC 60424-2, prepared by
IEC/TC 51 "Magnetic components and ferrite materials" was submitted to the IEC-CENELEC parallel
vote and approved by CENELEC as EN 60424-2:2016.

The following dates are fixed:
(dop) 2016-10-08
• 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) 2019-01-08
standards conflicting with the
document have to be withdrawn

This document supersedes EN 60424-2:1997.

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 60424-2:2015 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60424-1 NOTE Harmonized as EN 60424-1.
IEC 60424-2 NOTE Harmonized as EN 60424-2.
IEC 60424-3 NOTE Harmonized as EN 60424-3.
IEC 60424-4 NOTE Harmonized as EN 60424-4.
IEC 60424-5 NOTE Harmonized as EN 60424-5.
2

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SIST EN 60424-2:2016



IEC 60424-2

®


Edition 2.0 2012




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Ferrite cores – Guidelines on the limits of surface irregularities –

Part 2: RM-cores




Noyaux ferrites – Lignes directrices relatives aux limites des irrégularités de

surface –

Partie 2: Noyaux RM
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.100.10 ISBN 978-2-8322-3031-2



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60424-2:2016
– 2 – IEC 60424-2:2015 © IEC 2015
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Limits of surface irregularities . 5
3.1 Visual inspection and recommended limits . 5
3.2 Chips and ragged edges . 6
3.2.1 Chips and ragged edges on mating surfaces . 6
3.2.2 Chips and ragged edges on other surfaces . 6
3.3 Cracks . 9
3.4 Flash. 10
3.5 Pull-outs . 10
3.6 Crystallites . 11
3.7 Pores . 12
Bibliography . 13

Figure 1 – Chips and ragged edges on mating surfaces . 6
Figure 2 – Cracks location – Top view . 9
Figure 3 – Cracks location – Bottom view . 9
Figure 4 – Dimension W . 10
Figure 5 – Flash and pull-out location . 11
Figure 6 – Pull-out in clamping recess area . 11
Figure 7 – Crystallites location for RM-core . 11
Figure 8 – Pores location for RM-core . 12

Table 1 – Relevant subclauses for given irregularity versus location . 5
Table 2 – Allowable chipping areas . 6
Table 3 – Area and length references for visual inspection . 8
Table 4 – Limits for cracks . 10
Table 5 – W dimensions . 10

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SIST EN 60424-2:2016
IEC 60424-2:2015 © IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

FERRITE CORES – GUIDELINES ON THE LIMITS
OF SURFACE IRREGULARITIES –

Part 2: RM-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
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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
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misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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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
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