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Power Quality Analyzer Model 3945-B
37
Themeasurementtypeisselectedusingoneofthesixvariablefunctionbut-
tons. All of these measurements are valid in 3U, 3V, 3A, L1, L2 and L3.
The waveforms are selected by pressing the buttons:
- 3U displays the three phase-phase voltages of a three-phase system
- 3V displays the three voltages of a three-phase system
- 3A displays the three phase currents of a
three phase-3 wire
system
NOTE: The neutral current is not a direct measurement, but the resulting total of
the 3 currents measured.
- L1, L2 or L3 displays the current and voltage, on phase one, two or three,
respectively.
IMPORTANT NOTE: The choice of waveforms to be displayed, in any dis-
playmode,dependsonthetypeofconnection(see§4.1.5).
• Single-phase:Nochoice(L1) • Threephase-3wire:3U,3V,3A,L1,L2,L3
• Two-phase:2V,2A,L1,L2
• Threephase-4wire:3U,3V,4A,L1,L2,L3
5.1.2
RMS Voltage Measurement on 3 Phases
300V
RMS
0
-300
<t= 5.0ms V1= +2783 V2= -144 V3= -147 >
207.6 v 204.4 v 204.9 v
1 2 3
3U
3V
3A
L1
L2
L3
THD CF
max
min
07/25/0259.99Hz 10:26 100
%
Figure 5-2