Siemens SIRIUS 3RW44 - Introduction; 1.1 Physical Basics of the 3-phase Asynchronous Motor and Mode of Operation of the Soft Starter; 1.2 Application and Use; 1.3 Marginal Conditions for Storage and Operation

Introduction
SIRIUS 3RW44 manual
GWA 4NEB 535 2195-02 DS 02
1-3
Fig. 1-2: Typical starting torque behavior of a 3-phase asynchronous motor
Solution The current and torque behavior during start-up can be optimally adapted to the
requirement of the application using the SIRIUS 3RW44 electronic soft starter.
Motor
torque
M
Motor speed
n
M
Direct start
M
Nom
n
Nom
M
Load
e.g . pump
M
Acceleration
Motor
M
stall
002_Drehmomentkurven ohne Softstarter.wmf