Softstarters

SIRIUS 3RW soft starters – as versatile as your application

Constraints

The 3RW soft starters should always be designed on the basis of the required rated operational current of the motor. The motor ratings listed in the selection and ordering data are rough guide values and designed for basic starting conditions (CLASS 10). For other starting conditions we recommend the Simulation Tool for Soft Starters (STS).

Motor rating data in kW and hp is based on IEC 60947‑4‑1.

At an installation altitude above 2 000 m, max. permissible operational voltage is reduced to 480 V.

Installation altitude for SIRIUS 3RW soft starters

The selection and ordering data were determined for the following constraints (stand-alone installation without additional fan)

Applications

High Performance

General Performance

Basic Performance

SIRIUS soft starters

3RW55 / 3RW55-F

3RW52

3RW50

3RW40

3RW30

Constraints

Maximum starting time

s

20

10

3

Maximum starting current in % of motor current

Ie

300

Maximum number of starts per hour

1/h

5

20

Simulation Tool for Soft Starters (STS)

The Simulation Tool for Soft Starters (STS) provides a convenient means of designing soft starters using a simple, quick and easy-to-use interface. Entering the motor and load data will simulate the application and prompt suggestions for suitable soft starters.

Link to a free download of the Simulation Tool for Soft Starters (STS), see https://support.industry.siemens.com/cs/ww/en/view/101494917.

  • Simple, quick and user-friendly operator interface
  • Detailed and up-to-date Siemens motor database, including IE3/IE4 motors.
  • Simulation of heavy starting up to CLASS 30
  • Update-capable (e.g. motors, load types, functions)
  • Fast simulations with minimum input data
  • Immediate, graphical curve charts of start operations with limit values
  • View in table form of suitable soft starters for the application

Discover Softstarter

Basic - 3RW30 - without overload
Basic - 3RW30 - without overload
Basic - 3RW40 - with overload
Basic - 3RW40 - with overload
General - 3RW52 - 200-480V
General - 3RW52 - 200-480V
General - 3RW52 - 200-600V
General - 3RW52 - 200-600V
High - 3RW55 - 200-480V
High - 3RW55 - 200-480V
High - 3RW55 - 200-600/690V
High - 3RW55 - 200-600/690V
3RW44 - with comms option
3RW44 - with comms option

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