Siemens SIRIUS 3RW52 - Soft Stopping

Functions
7.3 Soft stopping
SIRIUS 3RW52 Soft Starter
98 Manual, 01/2019, A5E35630451002A/RS-AD/004
7.3 Soft stopping
Operating principle
A voltage ramp is used to implement soft stopping. With the ramp-based stopping function,
the motor voltage is decreased along a linear, negative voltage ramp.
t
1
... t
2
Ramp-down time
U
rated
Line voltage
Parameters
Parameter
Description
Ramp-down time The length of the ramp-down time defines the time within which the motor
voltage is reduced from line voltage to 0 V.
It may take longer for the motor to actually coast down to a standstill.