Siemens Sirius

Sirius soft starter 200-480 V 77 A, AC/DC 24 V spring clamp failsafe. The failsafe Sirius 3RW55 high performance is designed for demanding safety applications for the smooth start and stop of three-phase asynchronous motors. It allows for stepless starting, reduces current peaks, avoids voltage fluctuations during startup, relieves the power supply network, and decreases mechanical stress on the drive. Additionally, it offers significant space and wiring savings compared to star-delta starters and frequency converters, maintenance-free switching, and easy handling.

The integrated bypass enables a very compact design, saves energy, and ensures lower heating in the control cabinet. Intelligent monitoring functions protect the soft starter from overheating and the motor from overload. Furthermore, you can limit the current during startup to an adjustable maximum value. Thanks to the three-phase control, it is particularly suitable for large motor outputs. The innovative torque control ensures optimal motor startup.

Commissioning is simple and quick through auto-parameterization or application assistant. Predictive maintenance planning is possible through condition monitoring. The detachable HMI with color display provides clear measurement and diagnostic displays. The soft starter has worldwide approvals, including for explosion-hazardous applications.

The high performance failsafe 3RW55 soft starters are available for networks up to 600 V in a power range up to 315 kW with 24 V or 110-250 V control supply voltages and consistently feature screw and spring clamp connections. An analog output and thermistor motor protection are integral components of the high performance soft starters. Optional plug-in communication modules allow connection via PROFINET, PROFIBUS, and Modbus TCP. The built-in HMI module can also be mounted on the control cabinet door. Soft starter Sirius 3RW5 - as flexible as your task.