New Sirius 3RW5 soft starter generation for the soft starting of three-phase asynchronous motors from 5.5 to 1,200 kW
Modern hybrid switching technology for efficient switching, saving energy and ensuring a long service life
Variety of applications including pumping, ventilating and compressing as well as moving and processing
Comprehensive device range with matching hardware and individual expansions for all requirements
The new Sirius 3RW5 soft starters can be used in a host of applications thanks to specific functions – from pumping, ventilating and compressing, to moving and processing. In addition, they feature special functions such as starting time monitoring, automatic parameterization depending on motor startup, pump stop to avoid pressure peaks in piping systems, and condition monitoring with warning and alarm limits. They are also designed to be electrically rugged to fluctuations in line voltages. The new Sirius 3RW5 soft starter generation is fitted with modern hybrid switching technology to ensure efficient switching and energy-saving operation. This enables low-wear switching, extends the service life of the devices and provides mechanical protection for the drive train. The soft starting ensures that the devices avoid current peaks in the power supply system. All in all, using the new Sirius 3RW5 devices enhances the reliability of the application and increases the cost efficiency of the system. A further advantage when using the new 3RW5 generation of soft starters is the provision of data, for CAx tools like Eplan, for example. In addition, the Simulation Tool for Soft Starters (STS) helps the user to make a simple product selection. The new 3RW5 soft starters can be configured and commissioned easily and in a standardized manner in the TIA Portal using the Soft Starter ES engineering software. They are simply linked up to the automation system by means of the various communication options.
Soft starters limit the starting current and starting torque of drives and electric motors. In this way, mechanical loads and voltage dips in the line can be reduced. The motor voltage is then reduced using phase control and is increased from an adjustable starting voltage up to the desired line voltage within a specific ramp time. The motor is adjusted to the load characteristic of the driven machine by means of stepless control of the voltage supply. Soft starting and stopping reduces the load on connected equipment, and this supports smooth production. Mechanical components are accelerated gently, thus positively influencing operating characteristics, and extending service life.
For further information, go to www.siemens.com/softstarter3rw5