IEC 60404-11:2021
(Main)Magnetic materials - Part 11: Methods of measurement of the surface insulation resistance of electrical steel strip and sheet
Magnetic materials - Part 11: Methods of measurement of the surface insulation resistance of electrical steel strip and sheet
IEC 60404-11:2021 is applicable to electrical steel strip and sheet insulated by coating on one or both sides.
The object of this document is to define the general principles and technical details of the measurement of the surface insulation resistance of electrical steel strip and sheet.
NOTE This test is suitable for manufacturing and quality control in the application of insulation coatings.
This edition includes the following significant technical changes with respect to the previous edition:
Method B has been deleted and the measurement of individual currents through each contact button is enabled by Method A;
an improved arrangement of the test apparatus and the voltage stabilizing circuit for Method A, “Arrangement B”, is introduced.
an alternative layout using two pairs of contact assemblies in opposing position of the test specimen is introduced;
the restriction: “The same area of the test specimen shall not be used to test both sides.” has been deleted.
Matériaux magnétiques - Partie 11: Méthodes de mesurage de la résistance d'isolement superficiel des bandes et tôles en acier électrique
L'IEC 60404-11:2021 s'applique aux bandes et tôles en acier électrique isolées par un revêtement sur une seule face ou sur les deux faces.
Le présent document a pour objet de définir les principes généraux et les éléments techniques pour le mesurage de la résistance d'isolement superficiel des bandes et tôles en acier électrique.
NOTE Cet essai convient à la fabrication et au contrôle de la qualité dans l'application des revêtements isolants.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
la Méthode B a été supprimée, et la Méthode A permet de mesurer les courants qui traversent chaque touche de contact;
un montage amélioré, "Montage B", a été ajouté pour l'appareillage d'essai et le circuit de stabilisation de tension de la Méthode A;
une variante de montage, qui utilise deux paires d'ensembles de contacts situés en position opposée à l'éprouvette, a été introduite;
la restriction "Une même portion de l'éprouvette ne doit pas être utilisée pour caractériser les deux faces" a été supprimée.
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Standards Content (Sample)
IEC 60404-11 ®
Edition 2.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic materials –
Part 11: Methods of measurement of the surface insulation resistance of
electrical steel strip and sheet
Matériaux magnétiques –
Partie 11: Méthodes de mesurage de la résistance d'isolement superficiel des
bandes et tôles en acier électrique
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IEC 60404-11 ®
Edition 2.0 2021-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic materials –
Part 11: Methods of measurement of the surface insulation resistance of
electrical steel strip and sheet
Matériaux magnétiques –
Partie 11: Méthodes de mesurage de la résistance d'isolement superficiel des
bandes et tôles en acier électrique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.01; 29.030 ISBN 978-2-8322-9942-5
– 2 – IEC 60404-11:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle of measurement . 5
5 Test specimen . 7
6 Test apparatus . 8
6.1 Contact assembly . 8
6.2 Power supply . 8
6.3 Current measurement . 8
6.4 Applied force. 8
7 Verification . 9
8 Measurement procedure . 9
9 Evaluation of surface insulation resistance . 10
10 Uncertainty . 10
11 Test report . 11
Bibliography . 12
Figure 1 – Fundamental arrangement of the test apparatus (schematic) . 6
Figure 2 – Schematic arrangements of the test apparatus and the voltage stabilizing
circuit . 6
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MAGNETIC MATERIALS –
Part 11: Methods of measurement of the surface
insulation resistance of electrical steel strip and sheet
FOREWORD
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IEC 60404-11 has been prepared by IEC technical committee 68: Magnetic alloys and steels.
It is an International Standard.
This second edition cancels and replaces the first edition published in 1991, Amendment 1:1998
and Amendment 2:2012. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Method B has been deleted and the measurement of individual currents through each
contact button is enabled by Method A;
b) an improved arrangement of the test apparatus and the voltage stabilizing circuit for
Method A, “Arrangement B”, is introduced.
c) an alternative layout using two pairs of contact assemblies in opposing position of the test
specimen is introduced;
– 4 – IEC 60404-11:2021 © IEC 2021
d) the restriction: “The same area of the test specimen shall not be used to test both sides.”
has been deleted.
The text of this International Standard is based on the following documents:
CDV Report on voting
68/665/CDV 68/681/RVC
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 60404 series, published under the general title Magnetic materials,
can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
MAGNETIC MATERIALS –
Part 11: Methods of measurement of the surface
insulation resistance of electrical steel strip and sheet
1 Scope
This part of IEC 60404 is applicable to electrical steel strip and sheet insulated by coating on
one or both sides.
The object of this document is to define the general principles and technical details of the
measurement of the surface insulation resistance of electrical steel strip and sheet.
NOTE This test is suitable for manufacturing and quali
...
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