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Technical Specifications
9-21
650G AC Drive
Supply Harmonic Analysis (Frame C Heavy Duty)
Assumptions: 10000A short circuit supply capability
, equivalent
to 73
H supply impedance at 400V
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.
THD(V) x 100
Q
Q
h2
1n
h 40
h 2
%
Fundamental
Voltage (V)
230 400
500
Inverter Type
Three Phase
Motor Power
(kW)
5.5 7.5 5.5 7.5 11.0 15.0 5.5 7.5 11.0 15.0
Typical
Motor
Efficiency %
90 90 90 90 90 90 90 90 90 90
Harmonic
No.
RMS Current (A)
1
18.5 23.8 10.1 13.0 18.6 25.1 9.7 17.8 18.6 19.5
3
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
5
13.0 18.0 7.9 10.3 14.2 19.9 7.7 13.9 14.4 15.9
7
8.9 13.3 6.1 8.1 10.8 15.6 6.0 10.7 11.0 12.8
9
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
11
2.2 4.6 2.4 3.6 4.0 6.8 2.6 4.3 4.3 6.2
13
1.2 2.0 1.2 1.9 1.8 3.5 1.4 2.1 2.1 3.5
15
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
17
1.0 1.5 0.6 0.8 1.2 1.5 0.6 1.2 1.2 1.2
19
0.6 1.3 0.6 0.9 1.1 1.5 0.6 1.1 1.1 1.3
21
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
23
0.5 0.6 0.3 0.5 0.5 0.9 0.3 0.6 0.6 0.9
25
0.4 0.6 0.3 0.3 0.5 0.6 0.3 0.5 0.5 0.6
27
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
29
0.3 0.4 0.2 0.3 0.4 0.6 0.2 0.4 0.4 0.5
31
0.3 0.3 0.2 0.3 0.3 0.5 0.2 0.3 0.3 0.5
33
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
35
0.2 0.3 0.1 0.2 0.2 0.3 0.1 0.2 0.3 0.3
37
0.2 0.3 0.1 0.2 0.2 0.3 0.1 0.2 0.2 0.3
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
41
0.1 0.2 0.1 0.1 0.2 0.2 0.1 0.2 0.2 0.2
42
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
43
0.1 0.2 0.1 0.1 0.1 0.2 0.1 0.1 0.2 0.2
44
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
45
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
46
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
47
0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.2
48
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
49
0.1 0.1 0.1 0.1 0.1 0.2 0.1 0.1 0.1 0.2
50
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Total RMS
Current (A)
24.5 33.2 14.5 18.9 26.2 36.5 14.2 25.5 26.5 29.2
THD (V) %
0.57 0.86 0.40 0.54 0.70 1.03 0.40 0.70 0.72 0.87
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