Ferrite cores - Guidelines on the limits of surface irregularities - Part 1: General Specification

This part of IEC 60424 gives guidelines on the allowable limits of surface irregularities of ferrite
cores.
This standard should be considered as a general specification useful in the dialogue between
ferrite core manufacturers and customers about surface irregularities.

Ferritkerne - Leitfaden für Grenzwerte von sichtbaren Beschädigungen der Kernoberfläche - Teil 1: Fachgrundspezifikation

Noyaux ferrites - Lignes directrices relatives aux limites des irrégularités de surface - Partie 1: Spécification générale

L'IEC 60424-1:2015 fournit des lignes directrices relatives aux limites admissibles des irrégularités de surface des noyaux ferrites. Il convient de considérer la présente norme comme une spécification générale utile au dialogue 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 pores en 3.5 et de cristallites en 3.6.

Feritna jedra - Smernice o mejnih vrednostih površinskih nepravilnosti - 1. del: Splošna specifikacija

Ta del standarda IEC 60424 podaja smernice o dovoljenih mejnih vrednostih površinskih nepravilnosti feritnih jeder.
Ta standard naj bi se obravnaval kot splošna specifikacija, uporabna za izmenjavo mnenj glede površinskih nepravilnosti med proizvajalci feritnih jeder in strankami.

General Information

Status
Published
Publication Date
16-May-2016
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Apr-2016
Due Date
06-Jun-2016
Completion Date
17-May-2016

RELATIONS

Buy Standard

Standard
SIST EN 60424-1:2016
English language
15 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 60424-1:2016
01-junij-2016
1DGRPHãþD
SIST EN 60424-1:2002
Feritna jedra - Smernice o mejnih vrednostih površinskih nepravilnosti - 1. del:
Splošna specifikacija

Ferrite cores - Guidelines on the limits of surface irregularities - Part 1: General

Specification
Ta slovenski standard je istoveten z: EN 60424-1:2016
ICS:
29.100.10 Magnetne komponente Magnetic components
SIST EN 60424-1:2016 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 60424-1:2016
---------------------- Page: 2 ----------------------
SIST EN 60424-1:2016
EUROPEAN STANDARD EN 60424-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2016
ICS 29.100.10 Supersedes EN 60424-1:1999
English Version
Ferrite cores - Guidelines on the limits of surface irregularities -
Part 1: General specification
(IEC 60424-1:2015)

Noyaux ferrites - Lignes directrices relatives aux limites des Ferritkerne - Leitfaden für Grenzwerte von sichtbaren

irrégularités de surface - Beschädigungen der Kernoberfläche -
Partie 1: Spécification générale Teil 1: Fachgrundspezifikation
(IEC 60424-1:2015) (IEC 60424-1:2015)

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 60424-1:2016 E
---------------------- Page: 3 ----------------------
SIST EN 60424-1:2016
EN 60424-1:2016
European foreword
The text of document 51/1107/FDIS, future edition 2 of IEC 60424-1, prepared by

IEC/TC 51 "Magnetic components and ferrite materials" was submitted to the IEC-CENELEC parallel

vote and approved by CENELEC as EN 60424-1:2016.
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 60424-1:1999.

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 60424-1:2015 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 60401-3 NOTE Harmonized as EN 60401-3.
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 60424-8 NOTE Harmonized as EN 60424-8.
---------------------- Page: 4 ----------------------
SIST EN 60424-1:2016
IEC 60424-1
Edition 2.0 2015-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on the limits of surface irregularities –
Part 1: General specification
Noyaux ferrites – Lignes directrices relatives aux limites des irrégularités de
surface –
Partie 1: Spécification générale
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-3028-2

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
---------------------- Page: 5 ----------------------
SIST EN 60424-1:2016
– 2 – IEC 60424-1:2015 © IEC 2015
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative reference ........................................................................................................ 6

3 Terms and definitions....................................................................................................... 6

4 Examples of irregularities ................................................................................................. 7

5 Locations and functions of core parts and surfaces .......................................................... 7

5.1 General ................................................................................................................... 7

5.2 Mating surfaces ....................................................................................................... 7

5.3 Centre post ............................................................................................................. 8

5.4 Outer walls or legs .................................................................................................. 8

5.5 Back wall, bottom and back surfaces ....................................................................... 8

5.6 Wire-slot area ......................................................................................................... 8

5.7 Wire-way area ......................................................................................................... 8

5.8 Clamping recess area ............................................................................................. 8

6 Area and length reference for visual inspection ................................................................ 8

7 Limits of surface irregularities ........................................................................................ 11

7.1 General ................................................................................................................. 11

7.2 Chips and ragged edges ........................................................................................ 11

7.3 Cracks .................................................................................................................. 11

7.4 Flash..................................................................................................................... 11

7.5 Pull-outs ............................................................................................................... 11

7.6 Pores .................................................................................................................... 11

7.7 Crystallites ............................................................................................................ 11

8 Sectional specifications .................................................................................................. 11

Bibliography .......................................................................................................................... 13

Figure 1 – Examples of surface irregularities ........................................................................... 7

Figure 2 – Location of main core parts and surfaces – Example of RM-core type ..................... 7

Table 1 – Area and length reference for visual inspection ...................................................... 10

Table 2 – IEC 60424 sectional specifications ......................................................................... 12

---------------------- Page: 6 ----------------------
SIST EN 60424-1:2016
IEC 60424-1:2015 © IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FERRITE CORES –
GUIDELINES ON THE LIMITS OF SURFACE IRREGULARITIES –
Part 1: General specification
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.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

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 6042
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.