3 Operating the instrument
45
Select an alarm.
Back to the “EVENTS & ALARMS” menu screen.
3.9 Phase
Diagram
Phase diagram graphically represent fundamental voltages, currents and phase angles
of the network. This view is strongly recommended for checking instrument connection
before measurement. Note that most measurement issues arise from wrongly
connected instrument (see 4.1 for recommended measuring practice). On phase
diagram instrument shows:
•
Graphical
presentation
of voltage and current phase vectors of the measured
system,
•
Unbalance of the measured system.
3.9.1 Phase diagram
By entering PHASE DIAGRAM menu from MAIN MENU following screen is shown
(see
figure below)
.
Figure 3.32: Phase diagram screen.
Table 3.41: 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
U1, U2, U3
Fundamental voltages
U
1Fnd
, U
2Fnd
, U
3Fnd
I1, I2, I3
Fundamental currents
I
1Fnd
, I
2Fnd
, I
3Fnd
DPF
Displacement factor (cos
φ
) for particular phase:
DPF
1,
DPF
2
,
DPF
3
Indicate current and voltage scaling.
Value represents current or voltage value at the top of the graph (top
horizontal line).
