9-18
Technical Specifications
650G AC Drive
Supply Harmonic Analysis Frames 1 & 2 (230V unfiltered)
Assumptions:
(Short circuit fault to Neutral)
5kA short circuit supply capability at 230V 1
, equivalent to 146
H supply impedance
7.5kA short circuit supply capability at 230V 3
, equivalent to 56
H supply impedance
10
kA short circuit supply capability at 400V 3
, equivalent to 73
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)
0.25 0.37 0.55 0.75 1.1 1.5 2.2 3.0 4.0
Fundamental Voltage (V)
230 230 230 230 230 230 230 230 230
Typical Motor Efficiency %
85 85 85 85 85 85 85 85 85
Harmonic No.
RMS Current (A)
1
1.3 2.0 2.9 3.9 5.7 7.8 TBA TBA TBA
3
1.3 1.9 2.9 3.8 5.5 7.4
5
1.2 1.9 2.7 3.5 5.0 6.7
7
1.1 1.7 2.5 3.1 4.4 5.4
9
1.1 1.6 2.2 2.7 3.7 4.6
11
1.0 1.4 1.9 2.2 2.9 3.4
13
0.8 1.2 1.6 1.6 2.1 2.3
15
0.7 1.0 1.3 1.2 1.4 1.4
17
0.6 0.8 1.0 0.8 0.8 0.7
19
0.5 0.7 0.7 0.4 0.4 0.3
21
0.4 0.5 0.5 0.2 0.2 0.4
23
0.3 0.3 0.3 0.2 0.3 0.4
25
0.2 0.2 0.1 0.2 0.3 0.4
27
0.1 0.1 0.1 0.2 0.3 0.3
29
0.1 0.1 0.1 0.2 0.2 0.2
31
0.0 0.1 0.1 0.1 0.1 0.1
33
0.0 0.1 0.1 0.1 0.1 0.2
35
0.0 0.1 0.1 0.1 0.1 0.2
37
0.1 0.1 0.1 0.1 0.1 0.1
39
0.0 0.1 0.1 0.1 0.1 0.1
40
0.0 0.0 0.0 0.0 0.0 0.0
Total RMS Current (A)
3.2
4.8
6.7
8.3
11.7
15.3
THD (V) %
0.5633
0.8016
1.0340
1.0944
1.4611
1.7778
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