Siemens 3RW4027-1BB05

Soft starter SIRIUS 3RW40

The Sirius 3RW40 soft starter is intended for high power induction motors (up to 250 Kilowatt). The soft starter provides easy start, protects the motor against overload, reduces the current rate, inexpensive than use of the facilities. The data models are equipped with features unique to this capacity range: semiconductor motor overburden protection and inbuilt arrangement protection, controllable current limitative and control the two-phase method (polarity balance). The soft starter Siemens 3RW40 are the portion of the SIRIUS modular system. As a result, they have identical sizes and wiring diagrams. Due to its especially compact size, Siemens soft starters are half the size of star-delta starters, so they take at minimal space in the switch cabinet. At the contactor, they are applied as safety-free starting union for electric motors.