SIST EN 60424-4:2002

SLOVENSKI STANDARD
SIST EN 60424-4:2002
01-september-2002
Ferrite cores - Guide on the limits of surface irregularities - Part 4: Ring cores (IEC
60424-4:2001)
Ferrite cores - Guide on the limits of surface irregularities -- Part 4: Ring cores
Ferritkerne - Leitfaden für Grenzwerte von sichtbaren Beschädigungen der
Kernoberfläche -- Teil 4: Ringkerne
Noyaux ferrites - Guide relatif aux limites des irrégularités de surface -- Partie 4: Noyaux
toriques
Ta slovenski standard je istoveten z: EN 60424-4:2001
ICS:
29.100.10 Magnetne komponente Magnetic components
SIST EN 60424-4:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60424-4:2002

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SIST EN 60424-4:2002
EUROPEAN STANDARD EN 60424-4
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2001
ICS 29.100.10
English version
Ferrite cores -
Guide on the limits of surface irregularities
Part 4: Ring cores
(IEC 60424-4:2001)
Noyaux ferrites - Ferritkerne -
Guide relatif aux limites Leitfaden für Grenzwerte
des irrégularités de surface von sichtbaren Beschädigungen
Partie 4: Noyaux toriques der Kernoberfläche
(CEI 60424-4:2001) Teil 4: Ringkerne
(IEC 60424-4:2001)
This European Standard was approved by CENELEC on 2001-03-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60424-4:2001 E

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SIST EN 60424-4:2002
EN 60424-4:2001 - 2 -
Foreword
The text of document 51/579/FDIS, future edition 1 of IEC 60424-4, prepared by IEC TC 51, Magnetic
components and ferrite materials, was submitted to the IEC-CENELEC parallel vote and was
approved by CENELEC as EN 60424-4 on 2001-03-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2001-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2004-03-01
Annexes designated "normative" are part of the body of the standard.
In this standard, annex ZA is normative.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60424-4:2001 was approved by CENELEC as a European
Standard without any modification.
__________

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SIST EN 60424-4:2002
- 3 - EN 60424-4:2001
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
Publication Year Title EN/HD Year
IEC 60424-1 1999 Ferrite cores - Guide on the limits of EN 60424-1 1999
surface irregularities
Part 1: General specification

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SIST EN 60424-4:2002

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SIST EN 60424-4:2002
NORME CEI
INTERNATIONALE IEC
60424-4
INTERNATIONAL
Première édition
STANDARD
First edition
2001-02
Noyaux ferrites –
Guide relatif aux limites des irrégularités
de surface –
Partie 4:
Noyaux toriques
Ferrite cores –
Guide on the limits of surface irregularities –
Part 4:
Ring-cores
 IEC 2001 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun procédé, any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission in
microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http://www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
F
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

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SIST EN 60424-4:2002
60424-4 © IEC:2001 – 3 –
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references. 7
3 Limits of surface irregularities . 7
3.1 Uncoated ring-cores. 7
3.1.1 Chips and ragged edges (see figure 1). 7
3.1.2 Cracks and pull-out (see figure 2) . 9
3.2 Coated ring-cores . 9
3.3 Area and length reference (see table 1) . 11
Figure 1 – Chips and ragged edges location on ring-cores .
...