Cable
length [m]
Mains
voltage
Rise time
[
μ
sec]
Vpeak
[kV]
dU/dt
[kV/
μ
sec]
5
480
0.270
1.276
3.781
50
480
0.435
1.184
2.177
100
480
0.840
1.188
1.131
150
480
0.940
1.212
1.031
Table 9.28 Frequency converter, P37K, T4
Cable
length [m]
Mains
voltage [V]
Rise time
[
μ
sec]
Vpeak
[kV]
dU/dt
[kV/
μ
sec]
36
400
0.254
1.056
3.326
50
400
0.465
1.048
1.803
100
400
0.815
1.032
1.013
150
400
0.890
1.016
0.913
Table 9.29 Frequency converter, P45K, T4
Cable
length [m]
Mains
voltage [V]
Rise time
[
μ
sec]
Vpeak
[kV]
dU/dt
[kV/
μ
sec]
10
400
0.350
0.932
2.130
Table 9.30 Frequency converter, P55K, T4
Cable
length [m]
Mains
voltage [V]
Rise time
[
μ
sec]
Vpeak
[kV]
dU/dt
[kV/
μ
sec]
5
480
0.371
1.170
2.466
Table 9.31 Frequency converter, P75K, T4
Cable
length [m]
Mains
voltage [V]
Rise time
[
μ
sec]
Vpeak
[kV]
dU/dt
[kV/
μ
sec]
5
400
0.364
1.030
2.264
Table 9.32 Frequency converter, P90K, T4
9.6 Special Conditions
9.6.1 Purpose of Derating
Take derating into account when using the frequency
converter at low air pressure (high altitudes), at low
speeds, with long motor cables, cables with a large cross
section or at high ambient temperature. This section
describes the actions required.
9.6.2 Derating for Ambient Temperature
90% frequency converter output current can be
maintained up to max. 50
°
C ambient temperature.
With a typical full load current of IE2 motors, full output
shaft power can be maintained up to 50
°
C.
For more specific data and/or derating information for
other motors or conditions, contact Danfoss.
9.6.3 Derating for Ambient Temperature,
Enclosure Type A
60
°
AVM - Pulse Width Modulation
2
20%
4
6
8
10
12
14
16
40%
60%
80%
100%
110%
Iout (%)
fsw (kHz)
A1-A3 45°C, A4-A5 40°C
A1-A3 50°C, A4-A5 45°C
A1-A3 55°C, A4-A5 50°C
130BA393.10
0
0
Illustration 9.3 Derating of I
out
for Different T
AMB, MAX
for
Enclosure Type A, using 60
°
AVM
General Specifications and ...
Design Guide
164
Danfoss A/S © Rev. 06/2014 All rights reserved.
MG11BC02
9
9