Siemens SINAMICS SM150 - DV;Dt Filter (Option L10); Figure 3-10 Circuit Diagram Option L10

3.6.12 dv/dt filter (option L10)
Pulses at the drive output stress 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 2.5 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 3-10 Circuit diagram option L10
Restrictions when using the output filter
● The pulse frequency of the drive must not exceed 200 Hz.
● The drive may be operated only with following maximum currents:
– 4 kA drive: 1680 A (without filter 1750 A)
– 5 kA drive: 1780 A (without filter 1850 A)
● The power loss increases by approx. 30 kW.
● The following cable length up to 200 m:
● The re-cooling unit requires 10 liter more flow
Description
3.6 Description of options
SINAMICS SM150 6SL3845-2NN41-8AD2
52 Operating Instructions Rev.201910281310 EXAMPLE