Power Quality Analyzer Model 3945-B
45
5.1.7 Phasor Diagram Display (Fresnel Diagram)
V1
V2
V3
12
23
31
UNBALANCE
V3
V1
V2
RMS
202.8 v
1.5
%
198.7 v
203.2 v
+122 °
+118 °
+120 °
3U
3V
4A
L1
L2
L3
THD
CF
max
min
07/25/02
59.99Hz
10:26
100%
4
1
2
3
Figure 5-7
Absolute value of voltage or current, depending on display selection.
Φ
12 corresponds to phase angle between channel 1 and channel 2
Φ
23 corresponds to phase angle between channel 2 and channel 3
Φ
31 corresponds to phase angle between channel 3 and channel 1
NOTE:
This is valid for currents (4A and 3A) and for single voltage (3V).
When the user chooses to look at a specific phase (L1, L2 or L3)
Φ
VA is the
phase angle of V in relation to A.
Current or voltage unbalanced ratio.
Phasor diagram displays selection by voltage, current or phase.
It is advised to look at the phasor diagram prior to recording to check if the
probes are installed correctly. I1, I2 and I3 should be shown, when installed
on a live circuit, in a clockwise fashion.
The leading (inductive) or lagging (capacitive) effects of the load can be seen
at this time and a snapshot of this screen may be appropriate.