Danfoss iC7 Series

3
M
2
Control
unit, AFE
Star coupler
board, AFE
AFE
power
units
(1–6 PUs)
INU
power
units
(1–6 PUs)
Pre-charging
circuit
LCL
Filter
Mains
device
AC
fuses
DC
fuses
DC connection
AC grid
3
2 2 2
Control
unit, INU
Star coupler
board, INU
e30bk932.10
Figure 57: DC Connections of Parallel Power Units
3
M
2
Control
unit, AFE
Star coupler
board, AFE
AFE
power
units
(1–6 PUs)
INU1
power
units
(1–6 PUs)
Pre-charging
circuit
LCL
Filter
Mains
device
AC
fuses
DC
fuses
DC connection
AC grid
3
2
2 2
Control
unit, INU1
Star coupler
board, INU1
M
INU2
power
units
(1–6 PUs)
2 2
Control
unit, INU2
Star coupler
board, INU2
M
INU3
power
units
(1–6 PUs)
2 2
Control
unit, INU3
Star coupler
board, INU3
e30bk933.10
Figure 58: DC Connections of a Drive Lineup
66 | Danfoss Drives Oy © 2024.03 AJ475942178716en-000101 / 172K2848A
Design Guide | iC7 Series Liquid-cooled System Modules