RD51.1-5B-055-L-LV-FW Bosch Rexroth Indramat
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MPN: R911201317
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The Bosch Rexroth Indramat RD51.1-5B-055-L-LV-FW is a drive controller from the RD 500 Drive Controllers series with a rated power of 55 kW. It features a built-in brake chopper and uses forced air cooling. This unit supports U/f curve control and operates on a 500 V, 3-phase AC supply.
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Product Description:
The RD51.1-5B-055-L-LV-FW is a drive controller manufactured by Bosch Rexroth Indramat and assigned to the RD 500 Drive Controllers series. Within an automation cell, the unit converts three-phase mains power into regulated motor voltage and frequency so that induction motors can follow programmed speed profiles. It is intended for cabinet installation and serves as the central power stage between the plant supply and the driven motor group. This arrangement allows the drive to manage motor operation with stable electrical conversion during routine production changes.
This model contains a built-in brake chopper that diverts excess DC-bus energy during deceleration, allowing short stopping intervals without a separate braking module. Thermal management relies on forced air cooling, with axial fans moving ambient air across the heat sink to protect the power semiconductors during sustained operation. Speed is controlled through U/f curve control, which maintains a stable voltage-to-frequency ratio for general-purpose induction motor applications. The controller can provide up to 55 kW of output and operates from a three-phase AC supply, making it suitable for standard industrial distribution systems. This operating method supports common variable-speed duties where simple motor control and reliable heat removal are required.
The unit has a nominal input of 500 V, allowing it to connect to industrial power systems at that voltage level. During idle periods, an external auxiliary source supplies 24 V standby power so the control electronics can remain active while the main power section is switched off. Diagnostic support includes cable damping feedback (C3, D3), which helps monitor behavior in long motor leads. The controller is part of design generation 1. That generation identifies the product version used for this model line.
Frequently Asked Questions about RD51.1-5B-055-L-LV-FW:
Q: Does the RD51.1-5B-055-L-LV-FW drive controller include a brake chopper?
A: This model is equipped with a built-in brake chopper for dynamic braking applications.
Q: What control type does the RD51.1-5B-055-L-LV-FW utilize?
A: The RD51.1-5B-055-L-LV-FW controller uses U/f curve control for motor regulation.
Q: How is the RD51.1-5B-055-L-LV-FW kept cool during operation?
A: Forced air cooling is used in this drive controller to maintain optimal operating temperatures.
Q: What is the rated power output of the RD51.1-5B-055-L-LV-FW drive controller?
A: This unit is rated for 55 kW, enabling it to handle substantial power requirements.
Q: What supply voltage and type does the RD51.1-5B-055-L-LV-FW require for operation?
A: The RD51.1-5B-055-L-LV-FW operates on a 3-phase AC supply with a voltage range of 500 V.
