Product Description:

The RD52.1-4B-315-F-W1-FW is a drive controller manufactured by Bosch Rexroth Indramat and belongs to the RD 500 Drive Controllers series. The unit coordinates three-phase AC motor operation in automated machinery by converting fixed mains power into adjustable voltage and frequency outputs. This allows motor speed and torque to be matched to process demand in large production systems. It is suited to heavy-duty applications where stable regulation is needed for equipment such as conveying, pumping, and continuous-process machinery.

Its continuous output reaches 315 kW, providing sustained power for conveyors, extruders, and process pumps. The input section accepts line voltages from 380 to 480 V, and the supply uses a 3 x AC converter topology that rectifies and inverts three-phase mains power without external transformers. Motor regulation is handled through field-oriented vector control, which helps maintain stable response during load changes and supports accurate speed behavior at varying operating points. A built-in brake chopper dissipates regenerated energy into a connected resistor bank to help prevent DC-bus overvoltage during rapid deceleration. This is useful in applications with high rotating inertia or frequent braking cycles. The controller also maintains output accuracy within a ten percent tolerance band.

Thermal management uses forced-air cooling with integrated liquid circulation, helping keep internal temperatures stable when the device operates near maximum current. This cooling arrangement supports high thermal loads in demanding cabinet installations without relying on passive heat removal alone. For power terminations, the unit provides 95 mm² terminals C and F for ratings of 132 kW or higher, which support low-loss wiring with large conductors. Line harmonics are reduced by an integrated mains filter, lowering the need for additional cabinet hardware. Voltage deviations of ±10 % are tolerated without derating, allowing continued operation in facilities with seasonal or load-induced supply fluctuations.