As versatile as your application
The right soft starter for every application
SIRIUS soft starters are the best solution when direct or star-delta starting doesn’t apply to three-phase motors, because problems can often arise due to mechanical impact in the machine or voltage drops in the line supply.
Our range of soft starters with intelligent functions offers a soft alternative for almost any application, from simple to sophisticated drive requirements such as heavy-duty starting. They enable you to start three-phase motors smoothly, easily, and efficiently and implement reliable machine concepts.
In which soft starter technology do I need to invest in the next 6 months?
To create reliable machines, our new SIRIUS 3RW5 soft starters offer you intelligent functions such as automatic parameterization, pump cleaning, and condition monitoring. So if you’re designing a new machine in the near future, we’ll support you with sophisticated solutions for pumps, compressors, fans, and conveyor belts, or with process development; regardless of whether your machine is intended for the automotive, wastewater, or the food and beverage industry.
A portfolio for all requirements
From two-phase soft starters for standard applications to high-performance three-phase soft starters, our complete portfolio encompasses all performance classes from 1.5 to 1,200 kW, making it ideal for virtually any application.
Smart functionalities at a glance
Thanks to comprehensive and specific functions, our powerful, coordinated portfolio of soft starters is suitable for a wide range of applications.
No matter which industry you work in, take advantage of intelligent functions such as condition monitoring, automatic parameterization, pump cleaning, and integrated brake functions.
Your application in mind
The best of two technological worlds
Hybrid switching technology combines the advantages of electronic control via power semiconductor with the low-loss conducting properties of mechanical switching contacts. In each case, the strengths of the particular technology are exploited during the appropriate operating phase.
During the motor’s startup process, the soft starter is operated via the power semiconductor, which permits a fine and targeted control of the starting current. Once the motor has been soft-started by means of the semiconductor, the low-loss switching contacts supply the current for the rest of the operating phase until shutdown.
Because hybrid switching technology reduces wear at startup, it extends the switching service life of switching devices beyond that of conventional switching technology.
Differences between the switching technologies
Benefit along the entire value chain
The digital transformation of industry continues to advance. Data plays a significant role and also simplifies planning and engineering. The Simulation Tool for Soft Starters (STS) helps users easily select the necessary devices specific to their application.
With the TIA Selection Tool, we offer you a configurator for selecting products for your project. The SIRIUS Soft Starter ES engineering tool based on the TIA Portal lets you quickly and easily parameterize, monitor, and diagnose SIRIUS general and high performance soft starters. The device parameters can be set directly on a PC and transferred to the soft starter via Ethernet cable or a PROFINET connection.
Connecting our soft starters to MindSphere, our cloud-based, open IoT operating system, gives you further options; cross-plant diagnostics, convenient process optimization, plant-wide access to control data, as well as process and measured values, predictive maintenance, energy data management, and resource optimization.
Simulation Tool for Soft Starters (STS)
With the Simulation Tool for Soft Starters (STS), we provide a convenient way to design soft starters using a simple, quick, and user-friendly interface. You just need to enter the motor and load data to simulate the application. The tool then suggests suitable soft starters.
- Detailed, up-to-date Siemens motor database, including IE3 motors
- Fast simulations with a minimum of input data
- Immediate, graphical curve charts of start operations with limit values
- Table view of soft starters suitable for the application
SIRIUS Soft Starter ES engineering tool based on the TIA Portal
SIRIUS Soft Starter ES is the central software for project planning, commissioning, operation, and diagnosis of the SIRIUS 3RW5 General and High Performance soft starter series.
SIRIUS Soft Starter ES is seamlessly integrated into the central Totally Integrated Automation Portal (TIA Portal) Engineering Framework, thus providing users with a consistent, efficient, and intuitive solution for all their automation tasks.
- Parameterization and diagnosis directly on the device via PROFINET.
- Display of all operational, service, and diagnostics data
- Important information for preventing failures or for quickly locating and correcting errors.
Download & Support
Here you’ll find documents and videos on our offerings as well as additional information.