Siemens SINAMICS SM150 - DV;Dt Filter (Option L10)

3.6.12 dv/dt filter (option L10)
The drive generates pulses at the drive output which have a negative impact on the motor
insulation. The dv/dt filter is used to limit the voltage gradient to max. 1 kV/µs. At the same
time, the dv/dt filter is used to limit the capacitive recharging currents of the motor cables, and
therefore protects the motor insulation system. The dv/dt filter is integrated in the power unit.
① Drive
② Motor
R1,R2,R3 6 Ω dv/dt filter resistance
L1, L2,L3 20 μH dv/dt filter reactor
C1,C2,C3 1 μF dv/dt filter capacitor
M Center of the drive
N Center point of the dv/dt filter
Figure 3-18 Circuit diagram option L10
Description
3.6 Description of options
SINAMICS SM150 6SL3845-7NN46-7AA0
74 Operating Instructions 04/2017