Power And Direction Flow Analysis - AEMC PowerPad 3945 User Manual

5.2.3 Power and Direction Flow Analysis

VAh03
%
100
0
-100
V
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 nega-
tive 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
lighted by the cursor. This harmonic is generated by the load.
40
59.98Hz
-63
%
min - 22 %
1 3 5 7
A
07/25/02
- 122 °
max - 22 %
9 11 13 15 17 19 21 23 25
VA U
Figure 5-10
Power Quality Analyzer Model 3945
10:26 100%
G
.+
3L
L1
L2
L3
rd
harmonic high-