Siemens Midimaster Eco Reference Manual page 150

ECO REFERENCE MANUAL
Inverter Harmonics
The table below shows the approximate
harmonic currents as a percentage of the
fundamental current, based on a 1% typical
mains supply impedance.
Inverter Type Harmonic
& Supply Voltage Number
208-240V 3ac Fundamental
Type ECO1-2200/2
and below
208-240V 3ac Fundamental
Type ECO1-3000/2
and above
380/500V 3ac Fundamental
Type ECO1-4500/3
and below
380/500V 3ac Fundamental
Type ECO1-5500/3
to ECO1- 9000/3
Typical Harmonic Current
(% of fundamental current , i.e. 50 or 60Hz)
1% Mains Supply
Impedance
100%
th
5 72.9
th
7 48.4
th
11 10.6
th
13 5.5
100%
th
5 32
th
7 9.6
th
11 7.8
th
13 3.7
100%
th
5 72.5
th
7 52.6
th
11 17.0
th
13 7.2
100%
th
5 42.7
th
7 17.7
th
11 6.7
th
13 4.0
As indicated within the table the amplitude of
the harmonic currents can be reduced by fitting
2% or 4% input line reactors.
1% Mains Supply
Impedance with
a 2% Line
Reactor fitted
100%
56.3
31.3
6.6
6.6
100%
29.2
7.9
7.0
3.6
100%
62.0
36.7
7.4
6.2
100%
37.8
13.2
7.1
3.5
1% Mains Supply
Impedance with a
4% Line Reactor
fitted
100%
39.4
14.7
6.9
3.4
100%
26.0
6.9
5.9
3.4
100%
41.0
16.5
7.3
3.2
100%
32.6
9.2
6.9
3.3
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