MI 2792 PowerQ4 Plus
Operating the instrument
39
Table 3.30: Instrument screen symbols and abbreviations
Current recorder status:
RECORDER is active
RECORDER is busy (retrieving data from memory)
RECORDER is not active
Current instrument time
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
-
symU-
symI-
Negative sequence voltage ratio u
-
Negative sequence current ratio i
-
symU+
symI-
Zero sequence voltage ratio u
0
Zero sequence current ratio i
0
Indicate current and voltage scaling. Value represents current or voltage
value at the top of the graph (top horizontal line).
Table 3.31: Keys function
Waveform snapshoot:
Hold measurement on display
Save held measurement into memory
Toggle u
-
/u
0
voltages and select voltage for scaling (with
cursors)
Toggle i
-
/i
0
currents and select currents for scaling (with
cursors)
Switch to phase diagram
Switch to symmetry diagram
Switch to TREND view (available only during recording)
Scale displayed diagram by amplitude.
Back to the “MEASUREMENTS” menu.
3.7.3 Symmetry trend
During active
recording
SYMETRY TREND view is available (see section 3.9 for
instructions how to start RECORDER).
