
Adequate fuse protection for the drive configuration must be provided on the line side and on the DC side. The power cables and
busbars must be dimensioned with sufficient thermal and mechanical strength to handle short circuits in the system. See the fuse ratings
in
10.5.1 List of Fuse Size Information
.
3
M
2
Control
unit, AFE
Control
unit, INU
AFE
power
unit
INU
power
unit
Pre-charging
circuit
LCL
Filter
Mains
device
AC
fuses
DC
fuses
DC connection
AC grid
e3
0b
k9
31
.1
0
Figure 27: DC Connections of Single Power Units
42
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Design Guide | iC7 Series Air-cooled System Modules