1. The 3RW3028-1BB14 is a Siemens soft starter type SIRIUS 3RW30. It is a device used in electrical motor starting applications to reduce the surge voltage and current when the motor is switched on.
2. The device has a rated control supply voltage of 208 to 240V, with a maximum current of 28A. It is suitable for use with asynchronous and synchronous motors rated up to 30kW (40HP) of 3-phase 415V 400Hz.
3. It features a built-in bypass contactor, which allows switching on the motor directly from mains supply and provides protections against overload, short circuit and motor stall. The motor can also be restarted after an emergency stop or restart after power failure. It also has a fieldbus interface for connection to a PLC, and a display for information viewing.