EN IEC 61631:2020

SLOVENSKI STANDARD
01-oktober-2020
Nadomešča:
SIST EN 61631:2002
Metode za preskušanje mehanske trdnosti jeder iz magnetnih oksidov
Test method for the mechanical strength of cores made of magnetic oxides
Prüfverfahren zur Bestimmung der mechanischen Festigkeit von magnetischen
Oxidkernen
Méthode d'essai pour la résistance mécanique des noyaux en oxydes magnétiques
Ta slovenski standard je istoveten z: EN IEC 61631:2020
ICS:
29.100.10 Magnetne komponente Magnetic components
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61631

NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2020
ICS 29.100.10 Supersedes EN 61631:2001 and all of its amendments
and corrigenda (if any)
English Version
Test method for the mechanical strength of cores made of
magnetic oxides
(IEC 61631:2020)
Méthode d'essai pour la résistance mécanique des noyaux Prüfverfahren zur Bestimmung der mechanischen Festigkeit
en oxydes magnétiques von magnetischen Oxidkernen
(IEC 61631:2020) (IEC 61631:2020)
This European Standard was approved by CENELEC on 2020-06-11. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61631:2020 E
European foreword
The text of document 51/1312/CDV, future edition 2 of IEC 61631, prepared by IEC/TC 51 "Magnetic
components, ferrite and magnetic powder materials" was submitted to the IEC-CENELEC parallel vote
and approved by CENELEC as EN IEC 61631:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-03-11
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-06-11
document have to be withdrawn
This document supersedes EN 61631:2001 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 61631:2020 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 63093-6 NOTE Harmonized as EN IEC 63093-6
IEC 63093-8 NOTE Harmonized as EN IEC 63093-8
IEC 63093-12 NOTE Harmonized as EN IEC 63093-12

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
ISO 7500-2 -  Metallic materials - Verification of static EN ISO 7500-2 -
uniaxial testing machines – Part 2: Tension
creep testing machines - Verification of the
applied force
IEC 61631 ®
Edition 2.0 2020-05
INTERNATIONAL
STANDARD
Test method for the mechanical strength of cores made of magnetic oxides

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.100.10 ISBN 978-2-8322-8266-3

– 2 – IEC 61631:2020 © IEC 2020
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Apparatus . 6
4.1 Test core support and loading wedge . 6
4.2 Testing device . 7
4.3 Humidity measuring device . 7
5 Test cores . 7
5.1 General . 7
5.2 Number of test cores . 7
5.3 Precautions . 7
6 Testing . 7
6.1 Test conditions . 7
6.2 Test procedures . 7
6.2.1 General . 7
6.2.2 Test of E-cores . 8
6.2.3 Test of I-cores . 10
6.2.4 Test of ring-cores . 10
Annex A (normative) Standard dimensions of E-cores and their support
for strength test . 13
A.1 General . 13
A.2 Designation . 13
A.3 Test core support . 13
Annex B (normative) Standard dimensions of ring-cores and methods for strength test . 15
B.1 General . 15
B.2 Selection of mechanical strength test method for ring-core . 15
Bibliography . 16

Figure 1 – E test . 8
Figure 2 – W test . 9
Figure 3 – T test . 9
Figure 4 – M test . 10
Figure 5 – I test . 10
Figure 6 – Stretching method . 11
Figure 7 –Shearing method . 12
Figure 8 – Pressure method . 12
Figure A.1 – Designation of E-core . 13
Figure B.1 – Dimensions of ring-core . 15

Table A.1 – Test core support . 14
Table B.1 – Ring-core dimension designations . 15

IEC 61631:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TEST METHOD FOR THE MECHANICAL STRENGTH
OF CORES MADE OF MAGNETIC OXIDES

FOREWORD
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International Standard IEC 61631 has been prepared by IEC technical committee 51:
Magnetic components, ferrite and magnetic powder materials.
This second edition cancels and replaces the first edition published in 2001.
...