PSR4/5A-250 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen PSR4/5A-250 is a power supply with regen designed for BDS and ACS systems. Part of the PSR Servo Power Supplies series, it delivers an output power of 15 kW with a current rating of 50 Amps per phase and operates at a voltage rating of 230 VAC. The unit features a main input phase of 3 phase and has an internal dissipation of 175 W.
Internal Product Review
The PSR4/5A-250 is a Kollmorgen power supply with regen for BDS and ACS systems, engineered for 230 VAC service. A 3-phase input and 15 kW output support stable servo power delivery, making this unit a strong choice for demanding motion applications.
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Product Description:
The PSR4/5A-250 belongs to the PSR Servo Power Supplies series manufactured by Kollmorgen. This unit is a power supply with regenerative capability for BDS and ACS motion systems, providing the DC bus energy needed to operate multiple servo amplifiers in coordinated industrial automation cells. By converting a three-phase mains source into a regulated high-energy bus, the device supports rapid motor acceleration and deceleration while maintaining consistent voltage for precise axis control. Its role within a multi-axis system is to distribute stable electrical power as connected drives respond to changing speed and torque commands.
The supply delivers up to 15 kW of continuous output, indicating how much electrical power can be provided to connected servo drives under normal operating conditions. It is designed for a nominal line voltage of 230 VAC, so the cabinet must include breakers and wiring appropriate for that voltage class. Each input phase can conduct up to 50 A per phase, which must be considered when selecting conductors and managing heat inside the enclosure. The DC link has a bus capacitance of 0.00300 F, which smooths voltage ripple caused by load transients. To limit inrush current, the internal charging network brings the capacitors to their working potential within 0.5 s, reducing mechanical stress on upstream contactors during each power-up sequence.
Total heat generated by conversion losses is 175 W, and this value can be used to determine suitable panel ventilation or heat-sink capacity so that electronic components remain within their temperature limits. The unit accepts a three-phase mains feed, enabling balanced loading across the plant’s distribution transformers. When external dynamic braking hardware is used, the shunt circuit requires a minimum resistance of 4.3 ohms to absorb regenerated energy without exceeding the device limits. The unit has no built-in regeneration components, so an external resistor or another energy-handling method is required when braking large inertial loads. The selected braking equipment must be compatible with the supply and capable of dissipating the returned energy produced during motor deceleration.
