188.8.131.52 MAGI Test
The accuracy for the test voltage is given by:
A(VTEST ) = 1%
The accuracy for measuring magnetizing current is given as:
AT = AR +AC+AI
AT is the total accuracy (%)
AR is the basic relative accuracy (%)
AC is the calibration accuracy (%)
AI is the correction for current level (%)
The value of AR is given in the table in section 1.1 of this chapter.
The values of the other factors are given below.
AC = 0.03% + (0.001% x FM )
AI = 0.03% + (0.0001% /IM ) + (2% x IM )
FM is the measurement frequency (Hz)
IM is the measured current (A)