Siemens SINAMICS S220

9.2.3 Supported operation conditions
The following two operation conditions are supported when using the SITOP PSU400M. The
precharging relay must be closed directly after the drive lineup has run up as the SITOP PSU400M
represents a load for the DC link precharging resistors (equipped with PTCs). The DC link voltage
collapses as a consequence.
First operation condition
t
off
on
T_delay
Disable
Enable
0 A
15 A
240 s
SITOP LOAD
AC Power On
Smart Line Module
Enable
T_delay
Figure9-3 Time diagram
Condition:
• Environment: 40°C line voltage: 400V
• Drive system capacitance: 10mF
• Module status: cold
Note
T_delay is the permitted system startup time, less than 45s.
Second constraint
DC link components
9.2SITOP PSU400M
Booksize power units
252 Equipment Manual, 09/2023, A5E53307519B AA