Product Description:

The RS51.1-4G-024-T-NN-FW is a basic AC drive manufactured by Bosch Rexroth Indramat and placed within the RD 500 Drive Controllers series. As a converter module, it interfaces between a three-phase mains supply and an induction motor, adjusting frequency and voltage so automated machinery can run at the commanded speed and torque. By varying the motor supply in this way, the unit supports controlled operation on standard industrial equipment without requiring a mechanically fixed speed. This operating method allows the drive to match motor speed to process demand while keeping the electrical interface compact.

This unit is rated for a continuous output of 24 kVA, meaning it can deliver that apparent power to connected motors without derating. It accepts line voltages from 380 to 480 V and remains stable within a line fluctuation of ±10 %, so it suits common industrial power systems. The supply topology is a three-phase AC converter, which feeds the intermediate DC link from three alternating phases. A factory-installed built-in brake chopper and resistor dissipates regenerated energy during rapid deceleration, helping protect the DC bus against overvoltage. During braking, the internal hardware absorbs returned energy without requiring a separate external resistor in typical applications. An integrated mains filter also reduces conducted emissions on the input side.

The drive belongs to Design Generation 1, which identifies its product generation and cabinet-related layout. Control is performed through U/f curve control, so the output follows a preset voltage-to-frequency relationship for open-loop speed regulation on standard squirrel-cage motors. This control method is suitable where simple speed adjustment is needed without closed-loop motor feedback. Line-side interference is further reduced by the integrated mains filter, which helps limit conducted noise on the supply connection. As a basic drive, the device is configured without optional technology functions.