Dimensioning Of The Converter Transformer - Siemens SINAMICS DCM Compact User Manual

4.2.3

Dimensioning of the converter transformer

Application with three-winding converter transformer
1) Transformer
4) SINAMICS DCM master
8) Parallel interface
U = rated voltage of the line supply connected at the converter input
N
I = direct current through both SINAMICS DCM devices and motor
d
Figure 4-5
Transformer: A separate three-winding converter transformer is used to connect to the
network of a higher voltage level.
Preferred vector groups for the transformer: Dd0Dy11, Dd6Dy5, Yy0Yd11, Yy6Yd5,, u
4 % to 6 %
It is important to ensure that the three-phase current system on the slave device lags behind
that of the master device by 30°.
Transformer type rating: S
12-pulse applications
Compact User Manual, 09/2015, A5E34871844H
2) Overvoltage protection
5) SINAMICS DCM slave
9) Symmetry resistor
Converter transformer dimensioning at higher voltage level
= U × 1,35 × 1,05 × I
T N
12-pulse series connection
3) Insulation monitoring
6) DC motor
× 2
d
4.2 Configuration
=
k
33