Product Description:

The RS51.1-4G-024-D-NN-FW/S150 is a basic drive produced by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It operates as the core power converter for three-phase AC motors, supplying controlled voltage and frequency so motion sequences in automated machinery can be matched to process requirements. By housing the power electronics, protection circuits, and the communications gateway in one assembly, the drive reduces panel space and supports coordinated multi-axis systems used in material handling and manufacturing cells. This arrangement also suits equipment that needs repeatable motor control without a separate external converter stage.

A continuous rating of 24 kVA indicates the apparent power the inverter can deliver without thermal derating. The input network may range from 380 to 480 V three-phase, allowing installation on common plant mains in many facilities. Power enters through a three-phase AC converter rectifier stage and is then modulated by IGBT devices that use U/f curve control, which maintains a fixed volts-per-hertz ratio so motor flux stays stable across the speed range. This control method is well suited to applications that need dependable speed regulation without closed-loop feedback hardware. Heat generated by switching losses is carried outside the cabinet through a plug-through cooler for units up to 110 kW, which helps limit internal air temperature.

During dynamic cycles, the protection features are equally important. A built-in brake chopper and resistor dissipates regenerative energy during rapid deceleration, preventing DC-bus overvoltage without external hardware. This helps the DC bus remain within its operating window when the load changes abruptly. Input harmonics are reduced by the integrated mains filter, which also helps reduce conducted noise back to the supply. The converter tolerates voltage deviations of up to ±10 % of the nominal range for stable operation on weak or fluctuating grids. The drive is design generation 1.