Siemens 3RW4046-1BB04

Soft starter SIRIUS 3RW40

The Soft starter Sirius up to 250 kW are suitable for standard three-phase use and are allotted for soft start/stop of three-phase induction engines. They prevent the inrush current and torque caused by the utilize of "star-delta" starters. Soft starters are organized with optimum operating. The built-in bypass contact system decreases the power losses within working, whereby the components do not warm-up. On-off time can be set overload using four-step rotary switch. Thanks to the managed current limit, the engine is surely covered even from an unexpected growth in current strength. Three LEDs are utilized to display the possible errors, ineffective trip times, phase failure, device failure. Main typical applications: pumps, air conditioning systems, conveyors, compressors and coolers, centrifuges, mixers.