As versatile as your application

3RW soft starters

Go for a

0 %

  • soft start! SIRIUS soft starters are the best solution when direct-on-line or star/delta starting are not suitable for three-phase motors, because mechanical impacts in the machine or voltage dips in the power supply system can often cause problems. A full and comprehensive range of soft starters with intelligent functions offers a softer alternative for almost every application.

Go directly to the technical data of all our 3RW soft starters here

Industry Mall

See how easy it is to solve your plant problems with soft starters

You're fed up with failures due to load fluctuations?

SIRIUS soft starters make it easier to start your conveyor system

You want to put an end to blocked wastewater pumps?

SIRIUS soft starters reduce maintenance costs and prevent pump blockages

Want to learn how to prevent damage to your pumps and pipes?

SIRIUS soft starters protect your pump from water hammer

You want to keep track of the state of your plant at all times?

SIRIUS soft starters provide intelligent diagnostic data about the state of your plant

Discover more applications

SIRIUS Media Center

Soft starter portfolio – Focus on highlights

High Performance

5,5-1.200 kW

SIRIUS 3RW55 soft starter High Performance

Due to its exceptional functionality, the intelligent SIRIUS 3RW55 soft starter can solve even the most difficult starting and stopping tasks simply and particularly gently. Integrated smart functions (for example, pump cleaning, pump stopping, automatic parameterization, condition monitoring) help operators to run their pumps smoothly. Thanks to the SIRIUS 3RW55 Failsafe soft starters with integrated Safe Torque Off (STO) functionality, safety-related applications can also be realized.

 

  • Three-phase controlled for optimal motor start
  • Integrated, safety-related shutdown for SIL 1/PL c and SIL 3/PL e (with STO)
  • ATEX/IECEx-certified for use in hazardous areas
  • Engineering in the TIA Portal
  • A wide range of communications interfaces (PROFINET, PROFIBUS, EtherNet/IP, Modbus)
  • Integrated HMI (Human-Machine-Interface) with colour display
  • Media redundancy for reliable network availability

General Performance

5,5-560 kW

SIRIUS 3RW52 soft starter General Performance

The SIRIUS 3RW52 soft starter is an ideal alternative to star-delta starters. As an all-rounder, it covers all drive types.

 

  • Three-phase controlled for optimal motor start
  • Parameterization with rotary potentiometer
  • A wide range of communications interfaces (PROFINET, PROFIBUS, EtherNet/IP, Modbus)
  • HMI (Human-Machine-Interface) with display optional 
  • Engineering in the TIA Portal

Basic Performance

1,5-315 kW

SIRIUS 3RW30/3RW40/3RW50 soft starter Basic Performance

Thanks to their compact design, SIRIUS 3RW30/40/50 soft starters are the ideal solution for all standard applications.

 

  • Two-phase controlled for standard applications
  • Parameterization with rotary potentiometer
  • Optional communications interface (PROFINET, PROFIBUS, EtherNet/IP, Modbus)
  • Visualization of motor data via optional HMI or analog output
  • Integrated motor overload and intrinsic device protection
  • Engineering in the TIA Portal
  • ATEX/IECEx-certified for use in hazardous areas

Starter Kit "High Performance"

Test it now

Plug and play: install the software and set the parameters!

Test the new generation of 3RW55 soft starters and simply experience how easy commissioning is. With the SIRIUS Soft Starter ES software, you can set parameters, monitor and perform diagnostics for service tasks quickly and easily. You can set the device parameters of the 3RW55 directly from your PC or laptop.

Simulation Tool (STS)

Select and simulate

Simulation Tool for Soft Starters (STS)

You can use the Simulation Tool for Soft Starters (STS) to select the right devices for your application – as a desktop application or optimized for your mobile device. Your selection is then automatically transferred to the Siemens Industry Mall ready for ordering via a link.

Overview of 3RW soft starters

Media redundancy

One considerable advantage of SIRIUS 3RW55 soft starters is their media redundancy thanks to the new Profinet High Feature communication module and its integrated Ethernet switch. It provides a ring topology in which communication can be maintained via a second port even if the power fails.

EtherNet/IP

SIRIUS 3RW55 soft starter communicates now addionally with EtherNet/IP. This means it is able to communicate with a wide range of process control systems.

Electrical ruggedness

All SIRIUS soft starter have a wide-range voltage versions, so that even if there is a voltage dip, the continued operation of the soft starter, the motor and the application is ensured. This level of electrical ruggedness means that operation is secured even in power supply systems with sporadic voltage dips.

Related Content

SIRIUS modular system

The SIRIUS modular system combines digital planning and a standard-compliant implementation of your requirements.

Integrated Control Panels

The easy way to optimized control panels

TIA Portal

Perfect access to automation in digital enterprises: complete access to the entire digitalized automation.

PROFINET

Strengthen your industrial communications network: PROFINET – the pulse of the digital enterprise