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Power Quality Analyzer Model 3945-B
5.2.3 Power and Direction Flow Analysis
07/25/0259.98Hz 10:26 100
%
.+
3L
L1
L2
L3
-63
%
G
VAh03
min
-
22 %
-
122 °
max
-
22 %
V A VA U
100
-100
%
0
1 3 5 7 9 11 13 15 17 19 21 23 25
Figure 5-10
Harmonics on this screen are shown with either a positive or negative orientation.
Sincethebarselectedinthisexampleisnegative,itindicatesthatitisaharmonic
from load to source.
NOTE: By convention, positive harmonics are from supply to load, and negative
harmonics are from load to supply.
The signs are only available in harmonic power measurement.
The example above shows a power harmonic display with the 3
rd
harmonic high-
lighted by the cursor. This harmonic is generated by the load.
NOTE: Harmonic direction is influenced by probe installation on the proper phase
and arrow on probe facing the load.
W
VA