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Operating the converter on an IT system
Table 4-3
Converter operated on an IT system
Converter
Line supply with grounded neutral
Frame size
A
B
C
D
E
F
G
H
J
Without line filter
✓
✓
✓
✓
✓
✓
○
○
○
Integrated line filter C3
-
-
-
-
-
-
✓
1)
✓
1)
✓
1)
✓ = Operation permissible
✓
1)
Operation permissible once grounding screw has been removed
If the grounding screw has been removed, the converter no longer fulfills the requirements of class C3.
- Operation not permissible
○ Converter not available
More information on removing the grounding connection in the converter:
Removing functional grounding of the converter (Page 60)
4.1.1.4
Removing functional grounding of the converter
If you wish to use the converters with C3 line filter, note the information in the following sections:
TN system (Page 57)
TT system (Page 58)
IT system (Page 59)
Precondition
Switch off the converter power supply before removing the functional grounding.
WARNING
Electric shock as a result of a residual charge in power components
After the power supply has been switched off, it takes up to 5 minutes until the capacitors in
the converter have discharged so that the residual charge is at a non-hazardous level.
Therefore, touching the converter immediately after powering off can result in electric shock
due to residual charge in the power components.
● Check the voltage at the converter connections before you remove the functional
grounding.
Wiring
4.1 Line supply and motor
SINAMICS G120XA converter
60
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
Summary of Contents for SINAMICS G120XA
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