EN 60404-11:2013

SLOVENSKI STANDARD
01-marec-2013
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Magnetic materials - Part 11: Method of test for the determination of surface insulation
resistance of magnetic sheet and strip
Magnetische Werkstoffe - Teil 11: Meßverfahren zur Bestimmung des
Oberflächenisolationswiderstandes von Elektroblech und -band
Matériaux magnétiques - Partie 11: Méthode d'essai pour la détermination de la
résistance d'isolement superficiel des tôles et feuillards magnétiques
Ta slovenski standard je istoveten z: EN 60404-11:2013
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
29.030 Magnetni materiali Magnetic materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60404-11
NORME EUROPÉENNE
February 2013
EUROPÄISCHE NORM
ICS 17.220.01; 29.030 Supersedes EN 10282:2001

English version
Magnetic materials -
Part 11: Method of test for the determination of surface insulation
resistance of magnetic sheet and strip
(IEC 60404-11:1991 + A1:1998 + A2:2012)

Matériaux magnétiques -  Magnetische Werkstoffe -
Partie 11: Méthode d'essai pour la Teil 11: Messverfahren für die
détermination de la résistance d'isolement Bestimmung des
superficiel des tôles et feuillards Oberflächenisolationswiderstandes von
magnétiques Elektroblech und –band
(CEI 60404-11:1991 + A1:1998 + (IEC 60404-11:1991 + A1:1998 +
A2:2012) A2:2012)
This European Standard was approved by CENELEC on 2012-12-31. 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.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60404-11:2013 E
Foreword
This document (EN 60404-11:2013) consists of the text of IEC 60404-11:1991 + A1:1998 + A2:2012
prepared by IEC TC 68 "Magnetic alloys and steels".

The following dates are fixed:
• latest date by which the document has (dop) 2013-12-31
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2015-12-31
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 10282:2001.
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 60404-11:1991 + A1:1998 + A2:2012 was approved by
CENELEC as a European Standard without any modification.

IEC 60404-11 ®
Edition 1.2 2012-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic materials –
Part 11: Method of test for the determination of surface insulation resistance of

magnetic sheet and strip
Matériaux magnétiques –
Partie 11: Méthode d'essai pour la détermination de la résistance d'isolement

superficiel des tôles et feuillards magnétiques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX CD
ICS 17.220.01; 29.030 ISBN 978-2-88912-053-6

– 2 – 60404-11 © IEC:1991+A1:1998
+A2:2012
CONTENTS
FOREWORD . 3
1 Scope and field of application . 5
2 Principle of measurement . 5
3 Test specimen . 6
4 Apparatus . 6
4.1 Contact assembly . 6
4.2 Power supply . 7
4.3 Current measurement . 7
4.4 Determination of applied force . 8
5 Calibration . 9
6 Measuring procedure . 9
7 Evaluation of surface insulation resistance . 9
8 Test report . 10

Figure 1 – Arrangement of apparatus for the measurement of surface insulation resistance . 5
Figure 2 – Arrangement of stabilizing circuit: mode A . 8
Figure 3 – Arrangement of stabilizing circuit: mode B . 8

60404-11 © IEC:1991+A1:1998 – 3 –
+A2:2012
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––
MAGNETIC MATERIALS –
Part 11: Method of test for the determination
of surface insulation resistance of
magnetic sheet and strip
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.

This International Standard has been prepared by IEC technical committee 68: Magnetic alloys
and steels.
This consolidated version of IEC 60404-11 consists of the first edition (1991) [documents
68(CO)69 and 68(CO)76], its amendment 1 (1998) [documents 68/181/FDIS and 68/186/RVD]
and its amendment 2 (2012) [documents 68/434/FDIS and 68/435/RVD].
The technical content is therefore identical to the base edition and its amendments and has
been prepared for user convenience.

– 4 – 60404-11 © IEC:1991+A1:1998
+A2:2012
It bears the edition number 1.2.
A vertical line in the margin shows where the base publication has been modified by
amendments 1 and 2.
60404-11 © IEC:1991+A1:1998 – 5 –
+A2:2012
MAGNETIC MATERIALS –
Part 11: Method of test for the determination
of surface insulation resistance of
magnetic sheet and strip
1 Scope and field of application
This International Standard is intended to define a measurement method for the determination
of the characteristics of surface insulation resistance of magnetic sheet and strip.
This method is applicable to magnetic sheet and strip insulated on one or both surfaces and is
suitable for manufacturing control in the application of insulation coatings.
2 Principle of measurement
The principle of the measurement is based on, and includes, the method originally described by
*
Franklin which characterizes only one coated surface at a time.
The arrangement of the apparatus is shown in figure 1. Ten metallic contacts of fixed area are
applied to one coated surface of the sheet, under specified conditions of voltage and pressure.
The effectiveness of the surface insulation is assessed by the measurement of the currents
through the 10 contacts.
Micro-
Power supply
processor
Display
Contact buttons
Twist drill
(a total of 10)
for contact
Insulation
coating
Test specimen
IEC  1 595/98
Figure 1 – Arrangement of apparatus for the measurement of
surface insulation resistance
–––––––––
*
Franklin, R.F., "Measurement and control of interlaminar resistance of laminated magnetic cores", ASTM
Bulletin, no. 144, January 1947, p. 57.

– 6 – 60404-11 © IEC:1991+A1:1998
+A2:2012
Each contact button is individually fed from a d.c. power supply in one of the two ways which
constitute the two modes of measurement used in this standard, namely:
a) Mode A The voltage between the supply side of the 5 Ω ± 1 % resistors (see figure 2) and
the drill contacts is stabilized at 500 mV ± 0,5 % over a current range of 0 to 1 A. The two
twist drills perform the function of current return contacts with the substrate.
b) Mode B The voltage between each contact button and the drill contacts is stabilized at
250 mV ± 0,5 % over a current range from 0 to 2,5 A for the analysis of individual electrode
currents. The two twist drills perform different functions. One drill provides the current
return contact with the substrate. The other drill serves as a potential sensor for the voltage
feedback control. This method removes the influence of the variable contact resistance
between the current return drill and the substrate.
The voltage across subsidiary current sensing resistors of low-value, connected in series with
each electrode, but not included within the stabilized voltage, serves to indicate the value of the
current, as shown in figures 2 and 3.
Because the current path is between the contacts and the metallic substrate, this is not a true
measurement of interlaminar resistance. However, this test provides a useful indication of
surface in
...