Product Description:

The RD52.1-4N-055-W-V1-FW is a drive controller from the RD 500 Drive Controllers series. This generation 1 unit acts as the power and control interface between three-phase utility lines and industrial motors, using vector-based regulation to manage torque and speed in automated equipment. It is suited for closed-loop motor applications in packaging, printing, and material handling systems where stable speed control and repeatable motor response are required. The drive serves as the central power stage for machinery that depends on controlled acceleration, steady operation, and responsive load handling.

The unit accepts a 3 x AC converter supply and operates across an input range of 380 to 480 V, so it can be connected to common factory mains in either 400 V or 460 V systems. Its rated output is 55 kW, which suits medium-power motors used on pumps, presses, extruders, and similar process equipment. Control remains stable with line variation of ±10%, helping the drive continue operating through normal utility fluctuations. Motion control is based on field-oriented vector control, which supports accurate torque production at low speed and consistent speed regulation across a broad operating range.

Heat is removed by liquid cooling, which helps limit heat buildup inside the enclosure and reduces the need for high cabinet airflow. The drive is supplied without a built-in brake chopper, so returned braking energy must be handled by external hardware such as a resistor arrangement or a shared DC bus. An integrated mains filter reduces conducted interference on the supply connection and helps simplify the incoming power layout. The control section can remain active from an external 24 V standby power supply, which helps preserve communication and stored parameters when the main power stage is switched off.