Siemens 3RW4028-1TB05

Soft starter SIRIUS 3RW40

Siemens Sirius 3RW40 is intended for high power induction motors (up to 250 Kilowatt). The soft starter give light start-up, protects the motor against overload, lower the current expenditure, which makes the use of apparatus low-priced. The data devices are equipped with features unusual to this capacity range: solid-state engine overload defense and inbuilt protection devices, controllable current qualification and control the two-phase method. The soft starter Siemens 3RW40 are sections of the SIRIUS modular system. Consequently, they have identical dimensions and wiring schemes. Thanks to their special compact size, Siemens soft starters are half as much the size of star-delta starters, so they take up limited place in the switch cabinet. Together with the contactor, they are used as protective infinite combinations for starting motors.