Siemens 3RW4458-2BC45 SIRIUS soft starter Values at 500 V, 40 °C standard: 970 A, 710 kW Inside-delta: 1680 A, 1200 kW 400-600 V AC, 230 V AC spring-type terminals !!! Phased-out product !!! Successor is SIRIUS 3RW5, Preferred successor type is >>3RW5556-2HA16<<. Siemens 3RW4458-2BC45 3RW44 soft starters, Siemens SIRIUS 3RW soft starters.

SIRIUS 3RW44 soft starter High Performance
The SIRIUS 3RW44 High Performance soft starters are suitable for the torque-controlled soft starting and stopping as well as braking of three-phase asynchronous motors. In addition to soft starting and stopping, the SIRIUS 3RW44 soft starters provide numerous functions for higher-level requirements. Soft starters are available in a performance range up to 710 kW (at 400 V) in the inline circuit and up to 1 200 kW (at 400 V) in the inside-delta circuit. Combinations of various starting, operating and stopping possibilities ensure optimum adaptation to the application-specific requirements.


Siemens 3RW4458-2BC45 3RW44 soft starters
Siemens SIRIUS 3RW44 soft starter features
● Soft starting with breakaway pulse, torque control or adjustable current limiting
● Keypad with a menu-prompted, multi-line graphic display with background lighting
● Various setting options for the starting parameters such as starting torque, starting voltage, ramp-up and ramp-down time, and much more in three separate parameter sets
● Communication interface to the PC
● More accurate setting of the parameters as well as control and monitoring
● Connection to PROFIBUS and PROFINET with optional PROFIBUS DP or PROFINET module

Siemens 3RW soft starters Highlights

Siemens 3RW4458-2BC45 3RW44 soft starters