
Design Guide | iC7 Series Air-cooled System Modules
e3
0b
j3
10
.1
1
1
2 3 4
Figure 21: Fan Supply Connector of the LCL Filter
1
Fan supply (X121)
2
465–740 V DC (+)
3
Empty
4
0 V DC (-)
DC-
DC+
L3
L2
L1
L2
L1
L3
PE
DC-
DC+
+
X121
-
1
2
3
4
e3
0b
j3
06
.1
1
Figure 22: Diagram of the LCL Filter Fan Supply
1
AC fuses
2
LCL Filter
3
AFE module
4
DC fuses
6.8
Installation in an Impedance-grounded (IT) System
If the mains is impedance-grounded (IT), the AC drive must have the EMC protection level C4. If the drive has the EMC protection level
C3, it is necessary to change it to C4. To change the EMC protection level of the AC drive from C3 to C4, disconnect the LCL Filter ground
capacitor.
Danfoss Drives Oy © 2024.03 AJ389643111587en-000101 / 172F6361A |
37