Siemens SINAMICS G120XA, Operating Instructions Manual, Page: 34 / 918

Requirements for line reactors
Rated power of converter (kW) Line reactor can be omitted for
R
SC
Line reactor is required for R
SC
315 ... 500 ≤ 33 > 33
≥ 500 ≤ 20 > 20
It is recommended that a line reactor is always connected on the line side of the converter, as
in practice, it is often not known on which supply configuration individual converters are to be
operated, i.e. which supply short-circuit power is present at the converter connection point.
A line reactor can only be dispensed with when the value for R
SC
is less than that in the above
table. This is the case, when the converter, as shown in the following figure, is connected to the
line through a transformer with the appropriate rating.
0DLQVXSSO\FDEOH
LQGXFWDQFH
&RQQHFWLRQSRLQWRI
WKHWUDQVIRUPHU
&RQQHFWLRQSRLQWRI
WKHFRQYHUWHU
/LQH
&RQYHUWHU
6
NOLQH
6
N
6
WUDQVI
8
NWUDQVI
In this case, the line short-circuit power S
k1
at the connection point of the converter is
approximately:
S
k1
= S
transf
/ (U
k transf
+ S
transf
/ S
k2 line
)
S
transf
= Transformer rated power
S
k2 line
= Short-circuit power of the higher-level voltage level
U
k transf
= Relative short-circuit voltage
Article number
Converter frame size Rated power (kW) Line reactor
FSH 315 6SL3000-0CE36-3AA0
355 ... 400 6SL3000-0CE37-7AA0
FSJ 450 6SL3000-0CE38-7AA0
500 ... 560 6SL3000-0CE41-0AA0
2.6.2 Output reactor
The output reactor reduces the voltage rate of rise and dampens transient voltage peak at the
converter output, and enable longer motor cables to be connected.
Description
2.6 Optional components
SINAMICS G120XA converter
32
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB