l
For INU modules, derating is required when the switching frequency is higher than 3 kHz. The default switching frequency for AFE/
GC modules is 4 kHz.
100
[%]
A
95
90
85
80
[°C]
B
20
25
30
35
40
45
50
55
e3
0b
i2
49
.1
1
Figure 103: Output Current Derating vs. Ambient Temperature
A
Allowed output current
B
Ambient temperature
60
0
500 1000 1500 2000 2500 3000 3500 4000
70
80
90
100
A
[%]
B
[m]
e3
0b
i2
47
.1
0
Figure 104: Output Current Derating vs. Installation Altitude
A
Allowed output current
B
Installation altitude, above sea level
100
[%]
A
[kHz]
B
90
80
60
70
50
1
2
3
4
5
6
7
9
8
10
e3
0b
i2
48
.1
1
Figure 105: Output Current Derating vs. Switching Frequency (INU)
A
Allowed output current
B
Switching frequency
10.8
Power Losses
10.8.1
Power Losses of AFE Modules without Options, 380–440 V
The specifications for the values in the table
l
Active front-end module
138
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Design Guide | iC7 Series Air-cooled System Modules