12
SANTERNO
USER MANUAL
Rated Voltage (kV)
Cells Per Phase
Input Voltage Per
Cell (V)
Phase Voltage (V)
Line Voltage (kV)
Levels of Voltage
3.3
3
640
1900
3.3
7
4.16
4
600
2400
4.16
9
6
5
690
3460
6
11
6
6
640
3460
6
13
6.6
6
640
3810
6.6
13
10
9
640
5770
10
19
11
9
700
6350
11
19
3.1.1 Main Circuit
Figure 3-2
SINUS MV
6kV topology diagram
The isolated transformer is dry-type transformer and forced air cooling. The primary loop is Y-connection, directly
connects with MV cables. The secondary windings use extended delta connection. There is a certain degree of
phase difference between secondary windings.
Phase-shift angle = , n = number of cells in each phase
The secondary windings supply power for power cells, the phase difference between windings is determined by
the number of power cells and the voltage level of the VFD (see Table 3-1).
Table 3-1: The Power Cell Configuration
60°
n
