SIRIUS Soft Starters - Siemens

In the past, typical starter solutions forstandard applications were based ondirect and wye-delta* starting. Today,the advantages offered by soft startersolutions are increasingly utilized.SIRIUS soft starters, for example, notonly improve the start-up behavior ofescalators, elevators, conveyor belts andpumps, as they simply facilitate a softerstart-up than electromechanical starters.Above all, they protect the drive systemand the mains supply and thus contributeto reducing the system costs from manypoints of view.To allow for an optimum adjustment ofyour drive to the application, we offera complete portfolio of soft starters invarious sizes for almost any applicationarea. For example, the two-phasecontrolledSIRIUS 3RW30 is particularlysuitable for standard applications up to55 kW. SIRIUS 3RW40, which additionallyoffers motor overload, intrinsic deviceand thermistor motor protection, alsomasters demanding tasks in a softmanner within the power range from5.5 to 250 kW.* star-delta9