They must opposite Ici the first and fourth Quadrant of
the vector diagram.
.
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.
If current injected, the corresponding pointers will visible the lower area.
Measurement channels with polarity that has clearly been reversed can reconnected
and the polarity test repeated.Page 243
Commissioning the HPCI
The automatic test consists checking the plausibility the measurement channels' po-
larity.
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.
The view shown the section WinEDC's service screen for frequencies and for the
voltage indicators correct
