Siemens SIRIUS 3RW44 User Manual page 208

Circuit Examples
9.1.13Parallel Starting of 3 Motors
Control circuit
1) For permissible main and control voltage values, refer to Technical Data, pages 10-12 to 10-16.
Notice
The rated output of the 3RW44 to be configured must be at least as high as the sum of the motor rated
outputs.
The loads should have similar mass moments of inertia and torque curves.
SIRIUS 3RW44 manual
9-14
GWA 4NEB 535 2195-02 DS 06