EN 60424-3:1999

SLOVENSKI STANDARD
01-september-2002
Ferrite cores - Guide on the limits of surface irregularities - Part 3: ETD-cores and
E-cores (IEC 60424-3:1999)
Ferrite cores - Guide on the limits of surface irregularities -- Part 3: ETD-cores and E-
cores
Ferritkernen - Leitfaden für Grenzwerte von sichtbaren Beschädigungen der
Kernoberfläche -- Teil 3: ETD-Kerne und E-Kerne
Noyaux ferrites - Guide relatif aux limites des irrégularités de surface -- Partie 3: Noyaux
ETD et E
Ta slovenski standard je istoveten z: EN 60424-3:1999
ICS:
29.100.10 Magnetne komponente Magnetic components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
60424-3
INTERNATIONAL
Première édition
STANDARD
First edition
1999-06
Noyaux ferrites –
Guide relatif aux limites des irrégularités
de surface –
Partie 3:
Noyaux ETD et E
Ferrite cores –
Guide on the limits of surface irregularities –
Part 3:
ETD-cores and E-cores
 IEC 1999 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 photo-copie 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
K
PRICE CODE
International Electrotechnical Commission
Pour prix, voir catalogue en vigueur
For price, see current catalogue

60424-3 © IEC:1999 – 3 –
CONTENTS
Page
FOREWORD . 5
Clause
1 Scope.7
2 Normative references.7
3 Limits of surface irregularities. 7
3.1 Chips and ragged edges. 7
3.2 Cracks.15
3.3 Flash.15
3.4 Pull-outs.15

60424-3 © IEC:1999 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
___________
FERRITE CORES –
GUIDE ON THE LIMITS OF SURFACE IRREGULARITIES –
Part 3: ETD-cores and E-cores
FOREWORD
1) The IEC (International Electrotechnical Commission) 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, the IEC publishes International Standards. 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. The 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 the 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 National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60424-3 has been prepared by IEC technical committee 51:
Magnetic components and ferrite materials.
The text of this standard is based on the following documents:
FDIS Report on voting
51/530/FDIS 51/544/RVD
Full information on the voting
...