SIRIUS 3RW40 for standard applications

Siemens

SIRIUS 3RW40 is the star among our standard soft starters. Thanks to its innovative control method, it is not just the only 2-phase-controlled soft starter in the world for use in the power range up to 250 kW (at 400V) – respectively 300 hp (at 460V) – because of its especially compact design, it ensures a space-saving, clear layout in the control cabinet. It is therefore more than a mere functionally expanded addition to our 2-phase-controlled series of SIRIUS 3RW30/31 soft starters.


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The new 3RW40 soft starters in the lower power range from 5.5 - 55 kW (with 400 V) in sizes S0 to S3 expand the performance spectrum of the 3RW40 soft starters. They represent the compact and price-attractive alternative to start-delta starters.

Advantages at a glance

  • Uniform connecting system with screw or spring-loaded terminals

  • Space-saving, clear layout in the control cabinet thanks to small, compact design

  • Integrated bridging (bypass)

  • Inherent protection and protection against motor overload without additional wiring

  • Optional thermistor motor protection

  • Avoidance of peak inrush current thanks to adjustable current limitation

  • Simple and fast commissioning

  • Certified according to ATEX standards with sizes S0 - S12