Siemens SINAMICS S220

7.9 Frequency with which the DC link is precharged
Description
The permissible precharging frequency of the DC link capacitance by the Line Module is obtained
using the following formula:
1FSNJTTJCMFOVNCFSPGQSFDIBSHJOHPQFSBUJPOT
XJUIJO`NJO
.BYQFSNJTTJCMF%$MJOLDBQBDJUBODF
-JOF.PEVMFJOȈ'
࢔%$MJOLDBQBDJUBODFPGUIF
DPOGJHVSFEESJWFMJOFVQJOȈ'

Figure7-5 Frequency with which the DC link is precharged
The DC link capacitances of the individual components are indicated in the relevant technical
speci󹪝cations.
7.10 Duty cycles
7.10.1 Rated duty cycle for Smart Line Modules
Duty cycle overview
1
U
1
O
1
O
1
O
T
T
Figure7-6 S6 duty cycle with initial load for a duty cycle duration of 600s
U
1
T
1
O
T
1
O
1
O
Figure7-7 Duty cycle with low overload for a duty cycle duration of 300s
Smart Line Modules
7.10Duty cycles
Booksize power units
126 Equipment Manual, 09/2023, A5E53307519B AA