MI 2883 Energy Master
Operating the instrument
56
Figure 3.37: Unbalance diagram screen
Table 3.36: Instrument screen symbols and abbreviations
U0
I0
Zero sequence voltage component U
0
Zero sequence current component I
0
U+
I+
Positive sequence voltage component U
+
Positive sequence current component I
+
U-
I-
Negative sequence voltage component U
-
Negative sequence current component I
-
u-
i-
Negative sequence voltage ratio u
-
Negative sequence current ratio i
-
u0
i0
Zero sequence voltage ratio u
0
Zero sequence current ratio i
0
Table 3.37: Keys in Unbalance diagram screens
HOLD
Holds measurement on display. Hold clock time will be
displayed in the right top corner.
RUN
Runs held measurement.
U
I
I
U
Shows voltage unbalance measurement and selects voltage
for scaling (with cursors)
Shows current unbalance measurement and selects current
for scaling (with cursors)
METER
Switches to PHASE DIAGRAM view.
UNBAL.
Switches to UNBALANCE DIAGRAM view.
TREND
Switches to TREND view (available only during recording).
Scales voltage or current phasors.
Triggers Waveform snapshot.
Returns
to the “MEASUREMENTS” submenu.
F1
F2
F4
