Siemens SINAMICS S120 Combi - Operation of the Line Connection Components Via a Transformer; Safety Information; Line Connection Conditions

Line-side power components
3.8 Line connection versions
SINAMICS S120 Combi
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5
57
3.8.3
Operation of the line connection components via a transformer
3.8.3.1
Safety information
Note
If the system fault level is too low, this can result in faults at the integrated infeed of the
SINAMICS S120 Combi Power Modules. It can also cause faults and damage to other
equipment and devices that are conn
ected to the same line connection point as the S120
Combi Power Module.
Note
Using a transformer with the S120 Combi Power Module does not replace the external line
reactor.
3.8.3.2
Line connection conditions
The S120 Combi is approved for operation on line supplies from S
K line
/P
n
≥ 70.
If a TN line supply is specified on the secondary side, a transformer with grounded neutral
point must be used. On the other hand, to trigger the fuse within the specified time, the loop
resistance must be low enough.
Vector group
Any vector group with the neutral point brought out on the secondary side