Siemens Midimaster Eco - Page 150

ECO REFERENCE MANUAL
15-19
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.
As indicated within the table the amplitude of
the harmonic currents can be reduced by fitting
2% or 4% input line reactors.
Inverter Type
& Supply Voltage
Harmonic
Number
Typical Harmonic Current
(% of fundamental current , i.e. 50 or 60Hz)
1% Mains Supply
Impedance
1% Mains Supply
Impedance with
a 2% Line
Reactor fitted
1% Mains Supply
Impedance with a
4% Line Reactor
fitted
208-240V 3ac Fundamental 100% 100% 100%
Type ECO1-2200/2 5
th
72.9 56.3 39.4
and below 7
th
48.4 31.3 14.7
11
th
10.6 6.6 6.9
13
th
5.5 6.6 3.4
208-240V 3ac Fundamental 100% 100% 100%
Type ECO1-3000/2 5
th
32 29.2 26.0
and above 7
th
9.6 7.9 6.9
11
th
7.8 7.0 5.9
13
th
3.7 3.6 3.4
380/500V 3ac Fundamental 100% 100% 100%
Type ECO1-4500/3 5
th
72.5 62.0 41.0
and below 7
th
52.6 36.7 16.5
11
th
17.0 7.4 7.3
13
th
7.2 6.2 3.2
380/500V 3ac Fundamental 100% 100% 100%
Type ECO1-5500/3 5
th
42.7 37.8 32.6
to ECO1- 9000/3 7
th
17.7 13.2 9.2
11
th
6.7 7.1 6.9
13
th
4.0 3.5 3.3