BS 6404-2(1996) : 1996 AMD 10038

Committees responsible
National 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
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 the 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 to 400 Hz and d.c. magnetic measurements. Specifies general principles and technical details of measurement of magnetic properties of electrical steel sheet and strip using an Epstein frame. Applies to test specimens which have been obtained from electrical steel sheets and strips. Measurements should be made at an ambient temperature of (23 plus or minus 5) deg C on demagnetized test specimens. BS AMD 10038 RENUMBERS STANDARD