Siemens SINAMICS DCM - Configuration

12-pulse parallel connection
3.2 Configuration
12-pulse applications
Compact User Manual, 09/2015, A5E34871844H
13
side, and would therefore consequentially go into saturation.
The parameterization: the same as for a pure 12-pulse parallel connection
3.2
Configuration
Not permitted: Operation of several 12-pulse systems on a common 12-pulse transformer
The operation of several 12-pulse systems on a common 12-pulse transformer (see figure
below) is not permitted. This can cause balance currents, which can result in a blown fuse or
even damage (e.g., thyristor damage).
See the FAQ for 6RA70, SIMOREG DC MASTER and SIMOREG DC MASTER Control
Module. More than one 12-pulse system on a transformer
(https://support.industry.siemens.com/cs/ww/en/view/26041969)
Figure 3-3 Non-permissible parallel connection
However, you can connect devices in parallel according to Figure 3-4 Parallel connection of
additional SINAMICS DCM devices in 6-pulse operation (Page 14) or Figure 3-5 Parallel
connection of additional SINAMICS DCM units in 12-pulse operation (Page 15).