IEC 60404-2:1996+AMD1:2008 CSV

FOREWORD
1 Scope and object
2 Normative references
3 General principles of a.c. measurements
  3.1 Principle of the 25 cm Epstein frame method
  3.2 Test specimen
  3.3 The 25 cm Epstein frame
  3.4 Air flux compensation
  3.5 Power supply
  3.6 Voltage measurement
  3.7 Frequency measurement
  3.8 Power measurement
4 Procedure for the measurement of the specific total loss
  4.1 Preparation for measurement
  4.2 Adjustment of power supply
  4.3 Measurement of power
  4.4 Determination of the specific total loss
  4.5 Reproducibility of the specific total loss measurement
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
  5.1 Test specimen
  5.2 Principle of measurement
  5.3 Reproducibility
6 General principles of d.c. measurements
  6.1 Principle of the 25 cm Epstein frame method
  6.2 Test specimen
  6.3 The 25 cm Epstein frame
  6.4 Air flux compensation
  6.5 Power supply
  6.6 Apparatus accuracy
7 Procedure for the d.c. measurement of the magnetic
  polarization
  7.1 Preparation for measurement
  7.2 Determination of the magnetic polarization
  7.3 Determination of the magnetic hysteresis loop
  7.4 Reproducibility of the measurement of the magnetic
      polarization
8 Test report
Annex A (informative) Digital sampling methods for
        the determination of the magnetic properties
Bibliography

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.