Siemens 3RW4073-2BB44 Soft starter SIRIUS 3RW40

SIRIUS soft starter S12 230 A

Soft starters up to 250 kW are suitable for standard 3-phase use and are allotted for soft start/stop of 3-phase asynchronous motors. It's avoid the inrush current and torque that happen when utilization "star-delta" starters. The Sirius 3RW40 is organized with optimum serviceability. Fitted bypass contact system reduces energy losses in operation, so the constituent element does not super heat. With the four-step rotary switch, the overload trip time can be install. Thanks to the adjustable amperage limitation, the motor is reliably defended even from an unexpected increase in current strength. The 3 LEDs are used to mapping the operating mode, ineffective trip times (trip class), phase failure, overheating. The main typical applications: construction machines, presses, escalators, compressors and coolers, working mechanisms, agitators.