Danfoss VLT Midi Drive FC 280, Руководство по конструкции

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Cable
length
[m (ft)] Mains
voltage
[V]
Rise time
[
μ
sec]
U
PEAK
[kV]
dU/dt
[kV/
μ
sec]
5 (16.4) 240 0.072 0.468 5.25
50 (164) 240 0.208 0.592 2.28
Table 7.12 dU/dt Data for FC 280, 2.2 kW (3.0 hp), 3x200–240 V
Cable
length
[m (ft)] Mains
voltage
[V]
Rise time
[
μ
sec]
U
PEAK
[kV]
dU/dt
[kV/
μ
sec]
5 (16.4) 240 0.092 0.526 4.56
50 (164) 240 0.28 0.6 1.72
Table 7.13 dU/dt Data for FC 280, 3.7 kW (5.0 hp), 3x200–240 V
Cable
length
[m (ft)] Mains
voltage
[V]
Rise time
[
μ
sec]
U
PEAK
[kV]
dU/dt
[kV/
μ
sec]
5 (16.4) 240 0.088 0.414 3.79
50 (164) 240 0.196 0.593 2.41
Table 7.14 dU/dt Data for FC 280, 1.5 kW (2.0 hp), 1x200–240 V
Cable
length
[m (ft)] Mains
voltage
[V]
Rise time
[
μ
sec]
U
PEAK
[kV]
dU/dt
[kV/
μ
sec]
5 (16.4) 240 0.112 0.368 2.64
50 (164) 240 0.116 0.362 2.51
Table 7.15 dU/dt Data for FC 280, 2.2 kW (3.0 hp), 1x200–240 V
7.12 Special Conditions
Under some special conditions, where the operation of the
frequency converter is challenged, consider derating. In
some conditions, derating must be done manually.
In other conditions, the frequency converter automatically
performs a degree of derating when necessary. Derating is
done to ensure the performance at critical stages where
the alternative could be a trip.
7.12.1 Manual Derating
Manual derating must be considered for:
•
Air pressure – for installation at altitudes above
1000 m (3281 ft).
•
Motor speed – at continuous operation at low
RPM in constant torque applications.
•
Ambient temperature – above 45
°
C (113
°
F), for
details, see Illustration 7.3 , Illustration 7.4 ,
Illustration 7.5 , Illustration 7.6 , and Illustration 7.7 .
0%
0 2 4 6 8 10 12 14 16
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
K1 Derating Curve
Switching Frequency [kHz]
O
utput
Cu
rr
en
t
45C
50C
55C
130BE889.10
Illustration 7.3 K1 Derating Curve
0%
0 2 4 6 8 10 12 14 16
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
K2 Derating Curve
Switching Frequency [kHz]
O
utput
Cu
rr
en
t
45C
50C
55C
130BE890.10
Illustration 7.4 K2 Derating Curve
0%
0 2 4 6 8 10 12 14 16
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
K3 Derating Curve
Switching Frequency [kHz]
O
utput
Cu
rr
en
t
45C
50C
55C
130BE891.10
Illustration 7.5 K3 Derating Curve
Specifications
VLT
®
Midi Drive FC 280
84 Danfoss A/S © 03/2016 All rights reserved. MG07B102
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