Siemens standard soft starters

are used wherever the application of the motor-driven machine calls for soft starting and/or stopping.

SIEMENS offers a range of devices for this purpose:

• SIRIUS 3RW30/31 – the low-cost solution
  • For motor ratings up to 55 kW
  • Can be combined with SIRIUS components
• SIRIUS 3RW40 – with a particularly compact design
  • For motor ratings up to 250 kW
  • Can be combined with SIRIUS components

http://www.siemens.de/sanftstarter