38
Power Quality Analyzer Model 3945
5.2 Harmonics
Mode
Press the harmonic display mode button -
Use the function buttons to select the type of harmonic analysis:
V
- Single phase voltage analysis
A
- Current analysis
VA
- Power and direction fl ow analysis
U
- Phase-to-phase voltage analysis
The
and
buttons allow the user to zoom in or
out, in increments of 2%, 5%, 10%, 20%, 50% and 100%.
5.2.1 Single Phase and Phase-to-Phase Voltage Analysis
07/25/02
59.95Hz
10:26
100%
.+
3L
L1
L2
L3
3
1
2
31.5
%
Vh 03
1.3
%
0.6
%
31.4
v
2.7
v
1.2
v
+003 °
+113 °
-094 °
1
2
3
V
A
VA
U
50
%
25
1
3
5
7
9 11 13 15 17 19 21 23 25
Figure 5-8
Values measured for each phase, at cursor position (in the example shown
above, the 3
rd
harmonic is selected and displayed)
The information displayed is:
- Harmonic order
- Percentage relative to the fundamental
- RMS value
- Phase angle in relation to the fundamental, according to the measurement
type chosen (in this example V) with the variable function buttons just
below the screen.
