PSR45A-250 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
The Kollmorgen PSR45A-250 is part of the PSR Servo Power Supplies series and features a three-phase input with a voltage class of 230 VAC. This power supply delivers a continuous current output of 50 Amps per phase and provides up to 15 kW output power. It also operates with a DC bus voltage of 310 VDC and supports peak currents up to 100 Amps for short durations.
Internal Product Review
The PSR45A-250 is a Kollmorgen servo power supply designed for 230 VAC 3-phase input. Continuous 50 A rms/phase capacity and 15 kW output power give the unit strong headroom for servo systems, making PSR45A-250 a dependable choice for higher-demand motion applications.
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Product Description:
The PSR45A-250 belongs to Kollmorgen’s PSR Servo Power Supplies series and functions as the front-end power module for the company’s servo amplifiers in automation cells. It rectifies a three-phase mains supply and delivers DC bus energy for coordinated multi-axis motion. The module also regulates auxiliary logic rails, supporting stable power delivery for repeatable positioning and velocity control in packaging, printing, and material-handling equipment.
This supply furnishes a continuous phase current of 50 A, which is the maximum RMS output it can deliver to connected drives during steady loading. The DC link operates at 310 VDC, giving the amplifiers a stable bus from which to synthesize motor waveforms. The unit accepts a 230 VAC input through a three-phase topology, allowing direct connection to compatible industrial feeders. For short acceleration periods, it can source 75 A for two seconds. Very brief surges can reach 100 A for 50 milliseconds, supporting sudden current demand when high-inertia loads begin moving. These short-duration current capabilities help the connected drives maintain motor torque without unnecessary overcurrent interruptions.
A single-phase control input draws 3.0 A RMS to energize the internal circuitry that sequences the main power stage. The available output capacity reaches 15 kW, making the supply suitable for medium-to-large servo groups. An auxiliary rail provides 6.5 VDC at 4 A for compatible encoder or logic cards. A separate bipolar source supplies ±14.5 VDC at 2 A for analog interfaces and other supported control electronics. Under no-load conditions, the bipolar rail can rise to 26 VDC, which must be considered when selecting downstream regulators and connected components. The dedicated control input allows the sequencing circuitry to operate independently from the main three-phase power path, while the auxiliary rails provide low-voltage power within the same module.
