They must opposite Ici the first and fourth Quadrant of
the vector diagram.
Measurement channels with polarity that has clearly been reversed can reconnected
and the polarity test repeated.
The field stands for the signals the fundamental frequency (50 Hz), and frequencies f1
and for the signals with which the current injection performs the calculations.
If current injected, the corresponding pointers will visible the lower area.
The view shown the section WinEDC's service screen for frequencies and for the
voltage indicators correct.Page 209
Commissioning current injection
The automatic test consists checking the plausibility the measurement channels' po-
larity.
If the polarities are not plausible, 'Phase Usync' used synchronize both the Une
phases and correct the measured values while reversing the polarity few inputs as
possible.
