Siemens Sinamics G120P Operating Instructions Manual page 14

General
Limiting the rate of voltage rise and the voltage peaks using an output reactor and du/dt filter plus
Voltage Peak Limiter
Fast-switching IGBTs in the converter result in high voltage gradients du/dt at the converter
output. If long motor cables are used, this leads to an additional current load on the
converter due to capacitive charge/discharge currents. The high voltage gradients, and the
resulting transients at the motor terminals, cause the motors' electrical winding load to
increase as compared with direct on-line operation.
The du/dt filter plus Voltage Peak Limiter limits the rate of voltage rise to values < 500 V/µs
and the typical voltage peaks Û
150 m)
Figure 2-1
14
to < 1000 V at U
LL
Limiting the rate of voltage rise and the voltage peaks using an output reactor and du/dt
filter plus Voltage Peak Limiter
≤ 575 V (for motor cable lengths of ≤
line
dV/dt filter plus Voltage Peak Limiter
Operating Instructions, 11/2013, A5E32847105B AA