IEC 60404-3:1992

IEC 60404-3 ®
Edition 2.2 2010-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Magnetic materials –
Part 3: Methods of measurement of the magnetic properties of electrical steel
strip and sheet by means of a single sheet tester

Matériaux magnétiques –
Partie 3: Méthodes de mesure des caractéristiques magnétiques des bandes et
tôles magnétiques en acier à l'aide de l'essai sur tôle unique

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IEC 60404-3 ®
Edition 2.2 2010-04
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Magnetic materials –
Part 3: Methods of measurement of the magnetic properties of electrical steel

strip and sheet by means of a single sheet tester

Matériaux magnétiques –
Partie 3: Méthodes de mesure des caractéristiques magnétiques des bandes et

tôles magnétiques en acier à l'aide de l'essai sur tôle unique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20; 29.030 ISBN 978-2-8891-0186-3

– 2 – 60404-3 © IEC:1992+A1:2002+A2:2009

CONTENTS
FOREWORD.3

1 Object and field of application .5

2 Normative references .6

3 General principles .6

3.1 Principle of the method.6

3.2 Test apparatus .6

3.3 Air flux compensation .7
3.4 Test specimen.8
3.5 Power supply.8
4 Determination of the specific total loss .8
4.1 Principle of measurement .8
4.2 Apparatus.8
4.3 Measurement procedure of the specific total loss .9
5 Determination of magnetic field strength, excitation current and specific apparent
power .11
5.1 Principle of measurement .12
5.2 Apparatus.12
5.3 Measuring procedure.13
5.4 Determination of characteristics .14
5.5 Reproducibility .16

Annex A (normative) Requirements concerning the manufacture of yokes .19
Annex B (informative) Calibration of the test apparatus with respect to the Epstein
frame .20
Annex C (informative) Epstein to SST relationship for grain-oriented sheet steel .21
Annex D (informative) Digital sampling methods for the determination of the magnetic
properties .24

Bibliography.27

Figure 1 – Diagram of the test apparatus .17

Figure 2 – Yoke dimensions.17
Figure 3 – Diagram of the connections of the five coils of the primary winding .17
Figure 4 – Circuit for the determination of the specific total loss .18
Figure 5 – Circuit for measuring the r.m.s. value of the excitation current .18
Figure 6 – Circuit for measuring the peak value of the magnetic field strength .18
Figure C.1 – Epstein-SST conversion factor δP for grain-oriented material versus
magnetic polarization J .23
Figure C.2 – Epstein-SST conversion factor δHS for grain-oriented material versus
magnetic polarization J .23

Table C.1 – Epstein-SST conversion factors δP and δHS for grain-oriented material in
the polarization range 1,0 T to 1,8 T .22

60404-3 © IEC:1992+A1:2002+A2:2009 – 3 –

INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
MAGNETIC MATERIALS –
Part 3: Methods of measurement of the magnetic properties

of electrical steel strip and sheet by means

of a single sheet tester
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