SIRIUS Soft Starter 200-480 V 143 A, AC 110-250 V screw terminals. The SIRIUS 3RW55 High Performance Soft Starter is designed for demanding applications requiring smooth start-up and shut-down of three-phase asynchronous motors. It offers stepless starting, reduces current peaks, avoids voltage fluctuations during start-up, relieves the power supply network, decreases mechanical stress on the drive, and provides significant space and wiring savings compared to star-delta starters and frequency converters, all while being maintenance-free and easy to handle. The integrated bypass allows for a very compact design, saves energy, and reduces heating in the control cabinet. Intelligent monitoring functions protect the soft starter from overheating and the motor from overload. Additionally, you can limit the current during the start-up phase to a set maximum value. With three-phase control, it is particularly suitable for large motor power and square root of 3 circuits. The innovative torque control ensures optimal motor acceleration. Easy and quick commissioning is facilitated by auto-parameterization or an application assistant. Predictive maintenance planning is supported through condition monitoring. A detachable HMI with a color display provides clear measurement and diagnostic information. Worldwide approvals (e.g., IEC and UL/CSA) are available. The High Performance Soft Starters 3RW55 are offered for networks up to 690 V in a power range up to 560 kW with 24 V or 110-250 V control supply voltages, featuring both screw and spring-loaded connections. An analog output and thermistor motor protection are standard features 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. The 3RW55 soft starters replace the proven 3RW44 series. SIRIUS 3RW5 Soft Starters - as flexible as your application.