Power Quality Analyzer Model 3945
41
5.2.4 Harmonic Analysis in Expert Mode
Press on the
button to select
“-.+”
and then either the
“V”
or
“A”
variable
function button
“V”
or
“A”
.
Example of a typical display:
07/25/02
02
05
08
11
14
17
20
23
03
06
09
12
15
18
21
24
04
07
10
13
16
19
22
25
59.98Hz
10:26
100%
.+
3L
L1
L2
L3
7.3
%
0
15.5
%
4.8
%
V
A
Figure 5-11
•
First column:
The harmonics inducing a negative sequence are displayed.
•
Second column:
Those inducing a zero sequence (triplens added into the neu-
tral) are displayed.
•
Third column:
Those inducing a positive sequence are displayed.
Harmonic contest is useful to evaluate the infl uence of harmonics causing heating
of the neutral or on rotating machines can be analyzed.
