Siemens SINAMICS SM150

3.6.13 dv/dt filter (option L11)
The input filter is used to limit the voltage gradient to max. 1 kV/µs. At the same time, the input
filter is used to limit the capacitive recharging currents of the line cables and so protects the
transformer insulation system. The input filter is integrated into the power unit.
① Transformer
② Drive
R1,R2,R3 6 Ω Filter resistor
L1,L2,L3 20 μH Filter reactor
C1,C2,C3 1 μF Filter capacitor
M Center of the drive
N Center point of the dv/dt filter
Figure 3-20 Circuit diagram option L11
Usage restrictions for the input filter
● The drive may be operated only with following maximum currents:
– 4 kA drive: 1680 A (without filter 1770 A)
– 5 kA drive: 1780 A (without filter 1870 A)
● The following line length between the filter output and the transformer is permitted with
shielded cables (cable cross-section 185 mm
2
):
– 200 m when six parallel cables are used
– 400 m when three parallel cables are used
● The re-cooling unit requires 10 liter more flow
Description
3.6 Description of options
SINAMICS SM150 6SL3845-7NN46-7AA0
76 Operating Instructions 04/2017