Operating The Converter On An It System; Converter Operated On An It System; Removing Functional Grounding Of The Converter - Siemens SINAMICS G120XA Operating Instructions Manual

Wiring
4.1 Line supply and motor

Operating the converter on an IT system

Table 4-3
Converter
Frame size
Without line filter
Integrated line filter C3
✓ = Operation permissible
✓ Operation permissible once grounding screw has been removed
1)
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:
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:
Precondition
Switch off the converter power supply before removing the functional grounding.
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
60

Converter operated on an IT system

A
✓
-
Removing functional grounding of the converter (Page 60)
TN system (Page 57)
TT system (Page 58)
IT system (Page 59)
WARNING
grounding.
Line supply with grounded neutral
B C D
✓ ✓ ✓
- - -
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
E F G
✓ ✓ ○
- - ✓ ✓
1)
SINAMICS G120XA converter
H J
○ ○
✓
1) 1)