Siemens 3RW4027-1TB05

Soft starter SIRIUS 3RW40

The Sirius 3RW40 soft starter is designed for high power 250 kW asynchronous engines. The device give light start-up, allows you to protect the motor from overloads, lower power rate, which do the utilize of apparatus low-priced. The data devices use features unusual to this power diapason: semiconductor motor overburden defense and built-in protection devices, adjustable current limiting and 2-phase monitoring method. Siemens 3RW40 soft starters are sections of the SIRIUS modular system. Consequently, they have pinpoint dimensions and wiring diagrams. Thanks to their special dense size, Siemens soft starters are half as much the dimension of star-delta starters, thus they take at minimal space in the control cabinet. Together with the contactor, they are used as protective infinite union for electric motors.