1 Scope
This part of IEC 60404
is applicable to grain-oriented and non-oriented electrical steel strip and sheet
for measurement of AC magnetic properties at power frequencies.
The object of this document is to define the general principles and the technical
details of the measurement of the magnetic properties of electrical steel strip and
sheet by means of a single sheet tester (SST).
The single sheet tester is applicable to test specimens obtained from electrical steel
strips and sheets of any grade. The AC magnetic characteristics are determined for
sinusoidal induced voltages, for specified peak values of the magnetic polarization,
for specific peak values of the magnetic field strength and for a specified frequency.
The measurements are made at an ambient temperature of (23±5)°C on test specimens
which have first been demagnetized.
NOTE Throughout this document, the quantity "magnetic polarization" is used as defined
in IEC 60050‑221. In some standards of the IEC 60404 series, the quantity "magnetic flux density" was used.
In order to support the long-term reliability of the performance of this set up and
to understand better the relationship between the Epstein method and the SST method,
the informative Annexes B and C, respectively, have been included.
Open preview (PDF)Magnetic materials - Methods of measurement of the magnetic properties of electrical steel strip and sheet by means of a single sheet tester
