Technical Specifications
9-11
650G AC Drive
Supply Harmonic Analysis (400V unfiltered)
Assumptions:
(Short circuit fault to Neutral)
5kA short circuit supply capability at 230V 1
φ
, equivalent to 146
µ
H supply impedance
7.5kA short circuit supply capability at 230V 3
φ
, equivalent to 56
µ
H supply impedance
10
kA short circuit supply capability at 400V 3
φ
, equivalent to 73
µ
H supply impedance
THD(V) x 100
=
=
∑
Q
Q
h2
1n
h 40
=
h 2
%
where Q
1n
is the rated rms value of the fundamental voltage of the supply transformer.
The results conform to stage 1, stage 2 and stage 3 of the Engineering Recommendation G.5/3 September
1976, Classification ‘C’: Limits for Harmonics in the UK Electricity Industry
.
Drive Type
650G
Motor Power (kW)
0.37
0.55
0.75
1.1
1.5
2.2
3.0
4.0
5.5
7.5
Fundamental Voltage (V)
400
400
400
400
400
400
400
400
400
400
Typical Motor Efficiency %
85
85
85
85
85
85
85
85
85
85
Harmonic No.
RMS Current (A)
1
0.6
0.9
1.3
1.9
2.6
3.8
5.2
6.9
9.5
12.7
3
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
5
0.6
0.9
1.2
1.8
2.4
3.6
4.7
6.3
8.4
11.0
7
0.6
0.9
1.2
1.7
2.3
3.3
4.3
5.7
7.4
9.5
9
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
11
0.5
0.8
1.0
1.5
1.9
2.6
3.3
4.2
4.9
5.8
13
0.5
0.7
0.9
1.3
1.6
2.2
2.7
3.4
3.7
4.0
15
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
17
0.4
0.6
0.7
0.9
1.2
1.5
1.6
1.9
1.5
1.3
19
0.4
0.5
0.6
0.8
0.9
1.1
1.1
1.3
0.8
0.7
21
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
23
0.3
0.4
0.4
0.5
0.5
0.5
0.4
0.4
0.5
0.7
25
0.2
0.3
0.3
0.3
0.4
0.3
0.2
0.3
0.5
0.7
27
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
29
0.1
0.2
0.2
0.2
0.1
0.2
0.2
0.3
0.4
0.4
31
0.1
0.1
0.1
0.1
0.1
0.2
0.3
0.3
0.3
0.3
33
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
35
0.1
0.1
0.1
0.1
0.1
0.2
0.2
0.2
0.2
0.3
37
0.0
0.1
0.1
0.1
0.1
0.2
0.2
0.1
0.2
0.2
39
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
40
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Total RMS Current (A)
1.5
2.1
2.8
4.0
5.1
7.4
9.5
12.4
16.0
20.6
THD (V) %
0.1634 0.2209 0.2817 0.3569 0.4444 0.5886 0.7107 0.8896 1.0127 1.2138
