Siemens Soft starter 3RW4046-2BB04 (3RW40462BB04)

SIRIUS Soft Starter S3 80 A, 45 kW/400 V, 40 °C AC 200-480 V, AC/DC 24 V spring terminals. The SIRIUS 3RW40 soft starter is designed for standard applications to provide a smooth start and stop for three-phase asynchronous motors. It allows for stepless starting, reduces current peaks, avoids voltage fluctuations in the supply 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 compact design and ensures lower heating in the control cabinet. Intelligent monitoring functions protect the soft starter from overheating and the motor from overload. You can also limit the current during startup to an adjustable maximum value. With the integrated remote reset, faults can be quickly and easily resolved from a distance.

Worldwide approvals (e.g., IEC and UL/CSA) are also available for explosive environments (ATEX or IEC Ex). The 3RW soft starters are available for networks up to 690 V in a wide power range with different control supply voltages and are consistently equipped with screw and spring terminals. For 3RW30/40, there are additional variants with a 24 V control supply voltage. Some of the 3RW40 up to size S3, as well as all 3RW44, also offer thermistor motor protection.

With the optional connection module, the soft starters can be mounted on circuit breakers, even for the variants with spring terminals. The optional fan allows for an even more compact design in the control cabinet. Simple, efficient, always up to date - the SIRIUS system modular concept.