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Signal
Description
Time base
I02FFT
The magnitudes (RMS) of residual I0
2
current components:
- Fundamental
- 2
nd
harmonic
- 3
rd
harmonic
- 4
th
harmonic
- 5
th
harmonic
- 6
th
harmonic
- 7
th
harmonic
- 9
th
harmonic
- 11
th
harmonic
- 13
th
harmonic
- 15
th
harmonic
- 17
th
harmonic
- 19
th
harmonic.
5 ms
The selection of the used AI channel, the monitored harmonic, and the monitoring type (per-unit or
percentage of fundamental frequency) is made with setting parameters. In all possible input channel
variations the pre-fault condition is presented with a 20 ms averaged history value from -20 ms
from START or TRIP event.
General settings
The function can be set to monitor the ratio between the measured harmonic and either the measured
fundamental component or the per unit value of the harmonic current. The user must select the correct
measurement input.
Table. 5.3.5 - 49. Operating mode selection settings.
Name
Range
Step Default
Description
Harmonic
selection
0: 2
nd
harmonic
1: 3
rd
harmonic
2: 4
th
harmonic
3: 5
th
harmonic
4: 6
th
harmonic
5: 7
th
harmonic
6: 9
th
harmonic
7: 11
th
harmonic
8: 13
th
harmonic
9: 15
th
harmonic
10: 17
th
harmonic
11: 19
th
harmonic
-
0: 2
nd
harmonic
Selects the monitored harmonic component.
Per unit or
relative
0: × I
n
1: Ih/IL
-
0: × I
n
Selects the monitored harmonic mode. Either directly per unit ×
I
n
or in
relation to the fundamental frequency magnitude.
A
AQ
Q-F201
-F201
Instruction manual
Version: 2.04
93