IEC 60404-2:1996+AMD1:2008 CSV

Magnetic materials - Part 2: Methods of measurement of the magnetic properties of electrical steel strip and sheet by means of an Epstein frame

Applies to grain oriented and non-oriented electrical sheet and strip for a.c. measurements of magnetic properities at frequencies up to 400 Hz and for d.c. magnetic measurements. Defines the general principles and the technical details of the measurement of the magnetic properties of electrical steel sheet and strip by means of an Epstein frame. The a.c. magnetic characteristics are determined for sinusoidal induced voltages, for specified peak values of magnetic polarization and for a specified frequency. This consolidated version consists of the third edition (2000) and its amendment 1 (2008). Therefore, no need to order amendment in addition to this publication.
The contents of the corrigendum of March 2018 have been included in this copy.

Matériaux magnétiques - Partie 2: Méthodes de mesure des propriétés magnétiques des bandes et tôles magnétiques en acier au moyen d'un cadre Epstein

S'applique aux tôles et bandes magnétiques à grains orientés et non orientés, pour le mesurage des propriétés magnétiques en courant alternatif jusqu'à la fréquence de 400 Hz, et pour les mesures magnétiques en courant continu. Définit les principes généraux et les détails techniques du mesurage des propriétés magnétiques des tôles et bandes magnétiques au moyen d'un cadre Epstein. Les caractéristiques magnétiques en courant alternatif sont déterminées pour des tensions induites sinusoïdales, pour des valeurs crêtes particulières de la polarisation magnétique et pour une fréquence spécifiée.  Cette version consolidée comprend la troisième édition (2000) et son amendement 1 (2008). Il n'est donc pas nécessaire de commander l'amendement avec cette publication. Le contenu du corrigendum de mars 2018 a été pris en considération dans cet exemplaire.

General Information

• Status: Published
• Publication Date: 24-Jun-2008
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 29.030 - Magnetic materials
• Technical Committee: TC 68 - Magnetic alloys and steels
• Current Stage: PPUB - Publication issued
• Start Date: 25-Jun-2008
• Completion Date: 25-Jun-2008

Standards Content (Sample)

IEC 60404-2
Edition 3.1 2008-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic materials –
Part 2: Methods of measurement of the magnetic properties of electrical steel
strip and sheet by means of an Epstein frame

Matériaux magnétiques –
Partie 2: Méthodes de mesure des propriétés magnétiques des bandes et tôles
magnétiques en acier au moyen d'un cadre Epstein
IEC 60404-2:1996+A1:2008
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IEC 60404-2
Edition 3.1 2008-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Magnetic materials –
Part 2: Methods of measurement of the magnetic properties of electrical steel
strip and sheet by means of an Epstein frame

Matériaux magnétiques –
Partie 2: Méthodes de mesure des propriétés magnétiques des bandes et tôles
magnétiques en acier au moyen d'un cadre Epstein

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CH
CODE PRIX
ICS 29.030; 17.220.20 ISBN 2-8318-9835-8

− 2 − 60404-2 © IEC:1996+A1:2008
CONTENTS
FOREWORD.4
1 Scope and object .6
2 Normative references.6
3 General principles of a.c. measurements .7
3.1 Principle of the 25 cm Epstein frame method .7
3.2 Test specimen .7
3.3 The 25 cm Epstein frame.7
3.4 Air flux compensation .9
3.5 Power supply.9
3.6 Voltage measurement.9
3.7 Frequency measurement .10
3.8 Power measurement.10
4 Procedure for the measurement of the specific total loss.10
4.1 Preparation for measurement.10
4.2 Adjustment of power supply .10
4.3 Measurement of power .11
4.4 Determination of the specific total loss .11
4.5 Reproducibility of the specific total loss measurement.12
5 Procedure for the determination of the peak value of magnetic polarization, r.m.s.
value of magnetic field strength, peak value of magnetic field strength
and specific apparent power .12
5.1 Test specimen .12
5.2 Principle of measurement .12
5.3 Reproducibility.14
6 General principles of d.c. measurements .14
6.1 Principle of the 25 cm Epstein frame method .14
6.2 Test specimen .14
6.3 The 25 cm Epstein frame.14
6.4 Air flux compensation .15
6.5 Power supply.15
6.6 Apparatus accuracy .15
7 Procedure for the d.c. measurement of the magnetic polarization .15
7.1 Preparation for measurement.15
7.2 Determination of the magnetic polarization.15
7.3 Determination of the magnetic hysteresis loop .16
7.4 Reproducibility of the measurement of the magnetic polarization .16
8 Test report.16

Annex A (informative) Digital sampling methods for the determination of the magnetic
properties .21

Bibliography .24

60404-2 © IEC:1996+A1:2008 − 3 −
Figure 1 – Double-lapped joints .17
Figure 2 – The 25 cm Epstein frame.17
Figure 3 – Circuit for the wattmeter method .18
Figure 4 – Circuit for measuring the r.m.s. value of the magnetizing current.18
Figure 5 – Circuit for measuring the peak value of the magnetic field strength
using a peak voltmeter .19
Figure 6 – Circuit for measuring the peak value of magnetic field strength
using a mutual inductor M .19
D
Figure 7 – Circuit for d.c. testing: to obtain discrete values of magnetic polarization.20
Figure 8 – Circuit for d.c. testing: continuous recording method .20

− 4 − 60404-2 © IEC:1996+A1:2008
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MAGNETIC MATERIALS –
Part 2: Methods of measurement of the magnetic properties
of electrical steel strip and sheet by means of an Epstein frame

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International Standard IEC 60404-2 has been prepared by I
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