ABB ACQ800 Series, Hardware Manual

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34 ACQ800-37 Hardware Manual
The ACQ800-37
Typical line current ( i
U
) and phase voltage ( u
U
) waveforms are shown below.
An example spectrum and THD value of the current at the input of the drive are
shown below. Each harmonic is presented in percent of nominal current.
n denotes
the ordinal number of the harmonic.
I , U
u
U
i
U
t [ms]
0
1
2
3
4
5
6
7
8
9
10
THD 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49
I [%]
n