Siemens SIRIUS 3RW44 Manual page 15

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