RD52.1-4B-037-L-NN-NN-NN-FW Bosch Rexroth Indramat
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MPN: R911289511
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The Bosch Rexroth Indramat RD52.1-4B-037-L-NN-NN-NN-FW is a drive controller from the RD 500 Drive Controllers series. It has a rated motor output of 37 kW and operates on a supply voltage range of 380 to 480 V with forced air cooling. The built-in brake chopper delivers a continuous power of 23 kW and the controller weighs 36 kg.
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Product Description:
The RD52.1-4B-037-L-NN-NN-NN-FW belongs to the RD 500 Drive Controllers series from Bosch Rexroth Indramat. It is a three-phase AC converter drive controller used to regulate induction or synchronous machines in industrial automation. The controller uses field-oriented vector control, providing closed-loop torque and speed response for production equipment that must accelerate, decelerate, and hold loads precisely. The compact housing combines power electronics, integrated mains filtering, and a built-in brake section in an IP-rated module intended for cabinet installation.
The unit accepts a three-phase AC input of 380 to 480 V with a supply tolerance of ±10 %. Under these conditions, it supplies 45 kVA of apparent power and supports a rated motor output of 37 kW while delivering a steady current of 68 A. Overload capacity includes a 60-second peak current of 88 A and a matching peak apparent power of 58 kVA, and these limits also apply at the 4 kHz carrier frequency. Generation 1 hardware is shipped without optional application functions, yet an integrated mains filter curbs conducted noise, and the internal brake circuitry requires at least 7 Ω of external resistance. The enclosure is rated IP20, and thermal management depends on 0.2 m³/s of forced airflow across the heat sink.
A built-in brake chopper dissipates regenerating energy with a continuous capacity of 23 kW and a one-second peak of 93 kW, preventing DC-link overvoltage during rapid deceleration. The inverter itself releases 1 kW of heat at both nominal and 4 kHz switching frequencies, which the forced-air system removes to maintain silicon junction limits. The assembly, complete with its blower and heat sink, weighs 36 kg, giving the unit a single enclosure that integrates braking, filtering, and vector-based motor control without additional external modules.
Frequently Asked Questions about RD52.1-4B-037-L-NN-NN-NN-FW:
Q: Does the RD52.1-4B-037-L-NN-NN-NN-FW drive controller include a brake chopper?
A: The RD52.1-4B-037-L-NN-NN-NN-FW features a built-in brake chopper for dynamic braking applications.
Q: What is the rated motor output of the RD52.1-4B-037-L-NN-NN-NN-FW?
A: This drive controller delivers a rated motor output of 37 kW for continuous operation.
Q: What cooling method does the RD52.1-4B-037-L-NN-NN-NN-FW use?
A: The RD52.1-4B-037-L-NN-NN-NN-FW is cooled using forced air cooling, with an air requirement of 0.2 m³/s.
Q: What is the peak current capability of the RD52.1-4B-037-L-NN-NN-NN-FW drive controller?
A: It provides a peak current of 88 A for up to 60 seconds at 4 kHz switching frequency.
Q: What supply voltage range does the RD52.1-4B-037-L-NN-NN-NN-FW support?
A: The voltage input range for this model is 380 to 480 V AC with a ±10% tolerance.
