SN EN 60404-2 : 1998

Committees responsible
National foreword
EN foreword
1 Scope and object
2 Normative references
3 General principles of a.c. measurements
4 Procedure for the measurement of the specific total
    loss
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
6 General principles of d.c. measurements
7 Procedure for the d.c. measurement of the magnetic
    polarization
8 Test report
Annex ZA (normative) Normative references to international
publications with their corresponding European publications
Figures
1 Double-lapped joints
2 The 25 cm Epstein frame
3 Circuit for the wattmeter method
4 Circuit for measuring the r.m.s value of the magnetizing
    current
5 Circuit for measuring the peak value of magnetic field
    strength using a peak voltmeter
6 Circuit for measuring the peak value of magnetic field
    strength using a mutual inductor MD
7 Circuit for d.c. testing: to obtain discrete values of
    magnetic polarization
8 Circuit for d.c. testing: continuous recording method

Applies to grain oriented and non-oriented electrical sheet and strip for a.c. measurements of magnetic properties at frequencies not in excess of 400 Hz and for d.c. magnetic measurements. Specifies the general principles and technical details of the measurement of the magnetic properties of electrical steel sheet and strip using an Epstein frame.