Ferrite cores - Guidelines on the limits of surface irregularities - Part 4: Ring-cores

This part of IEC 60424 gives guidance on allowable limits of surface irregularities applicable
to ring-cores in accordance with the relevant generic specification defined in IEC 60424-1.
This standard is considered as a sectional specification useful in the negotiations between
ferrite core manufacturers and customers about surface irregularities.

Ferritkerne - Leitfaden für Grenzwerte von sichtbaren Beschädigungen der Kernoberfläche - Teil 4: Ringkerne

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

L'IEC 60424-4:2015 constitue un guide relatif aux limites admissibles d'irrégularités de surface applicables aux noyaux toriques conformément à la spécification générique applicable définie dans l'IEC 60424-1. La présente norme est considérée comme une spécification intermédiaire utile dans les négociations entre les fabricants et les clients de noyaux ferrites au sujet des irrégularités de surface. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - ajout de cristallites en 3.1.3 et de pores en 3.1.4.

Feritna jedra - Smernice o mejnih vrednostih površinskih nepravilnosti - 4. del: Obročkasta jedra

Ta del standarda IEC 60424 podaja navodila o dovoljenih mejnih vrednostih površinskih nepravilnosti, ki se uporabljajo za obročkasta jedra v skladu z ustrezno splošno specifikacijo, opredeljeno v standardu IEC 60424-1. Ta standard je področna specifikacija, uporabna za sklepanje dogovorov 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

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SLOVENSKI STANDARD
SIST EN 60424-4:2016
01-junij-2016
1DGRPHãþD
SIST EN 60424-4:2002
)HULWQDMHGUD6PHUQLFHRPHMQLKYUHGQRVWLKSRYUãLQVNLKQHSUDYLOQRVWLGHO
2EURþNDVWDMHGUD

Ferrite cores - Guidelines on the limits of surface irregularities - Part 4: Ring-cores

Noyaux ferrites - Lignes directrices relatives aux limites des irrégularités de surface -

Partie 2: Noyaux toriques
Ta slovenski standard je istoveten z: EN 60424-4:2016
ICS:
29.100.10 Magnetne komponente Magnetic components
SIST EN 60424-4:2016 en

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

---------------------- Page: 1 ----------------------
SIST EN 60424-4:2016
---------------------- Page: 2 ----------------------
SIST EN 60424-4:2016
EUROPEAN STANDARD EN 60424-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2016
ICS 29.100.10 Supersedes EN 60424-4:2001
English Version
Ferrite cores - Guidelines on the limits of surface irregularities -
Part 4: Ring-cores
(IEC 60424-4:2015)

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

irrégularités de surface - Beschädigungen der Kernoberfläche -
Partie 4: Noyaux toriques Teil 4: Ringkerne
(IEC 60424-4:2015) (IEC 60424-4:2015)

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 60424-4:2016 E
---------------------- Page: 3 ----------------------
SIST EN 60424-4:2016
EN 60424-4:2016
European foreword
The text of document 51/1109/FDIS, future edition 2 of IEC 60424-4, prepared by

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

vote and approved by CENELEC as EN 60424-4:2016.
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 60424-4:2001.

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 60424-4:2015 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.
---------------------- Page: 4 ----------------------
SIST EN 60424-4:2016
IEC 60424-4
Edition 2.0 2015-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Ferrite cores – Guidelines on the limits of surface irregularities –
Part 4: Ring-cores
Noyaux ferrites – Lignes directrices relatives aux limites des irrégularités de
surface –
Partie 4: Noyaux toriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.100.10 ISBN 978-2-8322-3027-5

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 60424-4:2016
– 2 – IEC 60424-4:2015 © IEC 2015
CONTENTS

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

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Limits of surface irregularities .......................................................................................... 5

3.1 Uncoated ring-cores ................................................................................................ 5

3.1.1 General ........................................................................................................... 5

3.1.2 Chips and ragged edges .................................................................................. 5

3.1.3 Cracks and pull-out .......................................................................................... 6

3.1.4 Crystallites ...................................................................................................... 6

3.1.5 Pores ............................................................................................................... 7

3.2 Coated ring-cores ................................................................................................... 7

3.2.1 General ........................................................................................................... 7

3.2.2 Coating features .............................................................................................. 7

3.2.3 Coating performance ....................................................................................... 8

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

Bibliography .......................................................................................................................... 10

Figure 1 – Chips and ragged edges location on ring-cores ...................................................... 6

Figure 2 – Cracks and pull-out location on ring-cores.............................................................. 6

Figure 3 – Crystallites location for ring-cores .......................................................................... 7

Figure 4 – Pores location for ring-cores .................................................................................. 7

Table 1 – Area and length reference for visual inspection ....................................................... 9

---------------------- Page: 6 ----------------------
SIST EN 60424-4:2016
IEC 60424-4:2015 © IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FERRITE CORES – GUIDELINES ON THE LIMITS
OF SURFACE IRREGULARITIES –
Part 4: Ring-cores
FOREWORD

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