Siemens SIRIUS 3RW44 - Page 15

Introduction
SIRIUS 3RW44 manual
GWA 4NEB 535 2195-02 DS 02
1-5
Fig. 1-4: Reduced torque behavior of the 3-phase asynchronous motor during start-up
with the SIRIUS soft starter 3RW44
Motor
torque
M
Motor speed
n
M
Direct
on-line
starting
M
Soft start
voltage ramp
M
Soft start
torque-controlled
M
Load ( e.g. pump).
1
2
3
1
2
3
M
Nom
n
Nom
005_Drehmomentkurven mit Sanftstarter.wmf