Here are some key features and specifications of the Siemens soft starter 3RW4074-6BB44:

Power Rating: The 3RW4074-6BB44 soft starter is designed for three-phase motors with a rated power between 200 and 440 kilowatts (kW). It can handle motors with voltages ranging from 200 to 480 volts (V).

Control Voltage: The control voltage of this soft starter is 24 volts DC (V DC). This voltage is typically provided by an external power supply or control circuit.

Current Rating: The 3RW4074-6BB44 soft starter has a rated operational current (AC-53a) of up to 430 amperes (A), allowing it to handle high starting currents.

Motor Protection: It includes built-in motor protection features such as overload protection.

Communication Interfaces: The soft starter supports various communication interfaces, such as PROFIBUS DP, Modbus RTU, and USS (Universal Serial Interface). These interfaces allow for easy integration into automation systems and enable monitoring and control of the soft starter remotely.

Diagnostic and Status Indicators: The device provides diagnostic and status information through LEDs (Light Emitting Diodes) on the front panel. These indicators help in troubleshooting and monitoring the operational status of the soft starter.

Control Modes: The soft starter offers different control modes, including voltage ramp control, current limit control, and torque control. These modes provide flexibility in selecting the appropriate start/stop characteristics for different applications.

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