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Rexroth HVR03.2-W045N – DIAX04 HVR Power Supply Unit
Product Overview
The Rexroth HVR03.2-W045N is a Bosch Rexroth Indramat DIAX04 HVR second-generation power supply unit designed to generate a regulated DC bus for compatible servo drives and inverters. The unit accepts three-phase 380–480 VAC input at 50–60 Hz and provides a nominal 750 VDC intermediate-circuit voltage. Its rated continuous DC-bus power is 45 kW, while short-duration output capability reaches 135 kW for 0.3 seconds. The power supply also supports regenerative-energy handling within the DIAX04 architecture. Bosch Rexroth documentation specifies internal air cooling and a built-in blower, making cabinet ventilation and clearance important during installation. This is a high-energy drive component, so DC-bus discharge time, grounding, and system protection must be verified before service.
Technical Specifications — HVR03.2-W045N
| Parameter | Value |
|---|---|
| Product Model | HVR03.2-W045N |
| Manufacturer | Bosch Rexroth / Indramat |
| Product Type | DIAX04 HVR Power Supply Unit |
| Input Voltage | 3 × 380–480 VAC ±10% |
| Input Frequency | 50–60 Hz ±2 Hz |
| DC Bus Voltage | 750 VDC |
| Continuous DC-Bus Power | 45 kW at 400 VAC input |
| Peak DC-Bus Power | 135 kW for 0.3 s |
| Short-Time Power | 105 kW for 3 s |
| Continuous Regenerative Power | 45 kW |
| Peak Regenerative Power | 90 kW |
| Maximum Regenerated Energy | Approx. 80 kWs |
| Cooling | Internal air cooling with built-in blower |
| Communication / Protocol | DIAX04 drive-system interface |
| Mounting | Vertical cabinet mounting |
| Protection | Verify exact hardware revision |
| Weight | Approx. 31 kg |
| Dimensions (HxWxD) | Verify against the applicable DIAX04 mechanical drawing |
The 45 kW continuous and 135 kW peak figures are documented by Bosch Rexroth technical material.
Rexroth HVR03.2-W045N
Key Features and Benefits — HVR03.2-W045N
- Three-phase high-voltage AC input for industrial drive systems.
- Regulated 750 VDC intermediate circuit for compatible DIAX04 drives.
- 45 kW continuous DC-bus power.
- 135 kW peak output for short acceleration events.
- Supports regenerative energy from connected motor drives.
- Internal blower-assisted air cooling for sustained operation.
- Designed for integration with high-power servo and inverter applications.
The short-time ratings should be considered during system engineering; they are not continuous operating ratings. Bosch Rexroth documentation specifically distinguishes continuous, 0.3-second peak, and 3-second short-time loading.
Related Models
HVR02.2-W025N — DIAX04 HVR power supply rated for 25 kW continuous DC-bus output.
HVR02.2-W010N — Lower-capacity HVR power supply providing 10 kW continuous DC-bus output.
HVE Series — Related DIAX04 supply family used for applications requiring alternative power-supply configurations.
R911190005 — Material-number reference associated with the HVR03.2-W045N configuration in industrial spare-parts listings.
Installation and Maintenance — HVR03.2-W045N
Before replacement, disconnect and lock out the three-phase AC supply, then follow the Rexroth procedure for DC-bus discharge. A 750 VDC intermediate circuit presents a serious electrical hazard even after incoming power has been removed.
Verify grounding, mains voltage, connected drive modules, DC-bus capacitance, cooling airflow, and cabinet clearance before energizing the unit. Inspect the blower, power terminals, bus connections, and protective devices for overheating or contamination. Personally, I would verify the exact hardware revision and complete drive-system configuration rather than treating another 45 kW supply as an automatic substitute.
Product Warranty — HVR03.2-W045N
Warranty terms depend on supplier, condition, testing status, and purchase agreement. For refurbished or surplus units, request a functional inspection and confirm the exact material number before shipment. The Rexroth HVR03.2-W045N should be matched to the connected DIAX04 drive architecture, mains supply, regenerative requirements, and cabinet cooling design before commissioning.
