RD52.1-4B-400-R-V1-FW

RD52.1-4B-400-R-V1-FW, Bosch Rexroth Indramat, RD 500 Drive Controllers is a high-performance AC drive converter designed for heavy industrial applications. It accepts a Nominal Connecting Voltage of 3 x AC 380-480 V and delivers a Rated Power output of 400 kW. This Unit Type converter features a built-in brake chopper for dynamic braking and rapid deceleration. The drive’s Cooling Mode is liquid cooling with internal pump, ensuring stable thermal management under continuous heavy loads.

Bosch Rexroth Indramat’s RD52.1-4B-400-R-V1-FW offers a Stand-by Power input of 24 V DC, enabling control electronics to remain active even when the main supply is off. Operating on 4 kHz pulse frequency, it provides a Rated Motor Output Frequency range of 0–150 Hz with a Rated Current of 680 A and a Rated Apparent Power of 448 kVA. At 8 kHz pulse frequency, the unit extends the output frequency up to 250 Hz with a Rated Current of 540 A and Apparent Power of 355 kVA. The robust Protection Class of IP20 shields internal components from dust and debris, and firmware updates are supported via a separately ordered upgrade kit.

Seamless integration into existing REFUdrive RD50 Drive Control Series architectures is achieved through standard control interfaces and a compact footprint, reducing panel space and wiring complexity. The RD52.1-4B-400-R-V1-FW’s liquid-cooling loop with internal pump enhances reliability in high-duty-cycle environments, while the 24 V DC standby feature allows parameterization and diagnostics even during power interruptions. Ideal for large motors in pump, fan, and compressor installations, this drive controller delivers precise speed regulation, extended uptime, and simplified maintenance for critical processes.