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Power Testing That Accurately Simulates Realistic Server Loads

Validating power supply units (PSUs) and rectifiers isn’t just about checking power delivery. It’s replicating dynamic server loads, catching rare transients, and proving hardware can survive real-world conditions. Legacy test benches fall short, wasting energy, bottlenecking throughput, and missing faults that only show up under load edge cases.

High Power ATE System Power Supplies NPI

Accelerate Testing Under Real Server Load Conditions

Our latest programmable power supplies and regenerative electronic loads simulate fast transients, startup surges, and high-current profiles seen in modern server architectures. No need for live racks, static loads, or manual rewiring during test.

The result? Faster PSU and rectifier validation, lower lab overhead, and more reliable infrastructure rollouts.

Use Case 1: Validating Server Power Supply Units

Ensuring Performance, Stability, and Efficiency Under Realistic Conditions

Validating power supply units under real server conditions demands more than static loads. With programmable sources and regenerative eloads, you can simulate dynamic transients, startup surges, and failover events without tying up racks or burning excess energy.

Start with 1.5 to 3.4 kW units for single-supply validation, or scale to 6 kW+ for redundant and efficiency testing. You’ll get repeatable load profiles, faster cycles, and lower power and cooling overhead.

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Keysight Engineer working on server PSU validation
Simulating a DC rectifier with RP5900 regenerative power supplies and EL4900 electronic loads

Use Case 2: Simulating a Direct Current Rectifier

Replicate Real-World Loads to Validate Rectifier Performance

Traditional load banks fall short when simulating the dynamic behavior of modern server loads. With regenerative electronic loads, you can replicate steep ramp-ups, high crest factors, and bursty transients to see how rectifiers respond under real conditions.

Start with a 4 or 6 kW unit for midrange rectifiers, or scale up to 12 kW or paralleled units for full rack-level emulation — all with consistent control and synchronized automation. You’ll get faster validation, clean transitions, and energy recovery for extended test cycles.

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Webinar: Avoiding Pitfalls in High-Power Test

Discover the five most common mistakes in high-power validation and proven strategies to avoid them.

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  • Customer Quote Icon

    "We get designs failing in the field that passed our legacy tests. The missing link? We’re not simulating real load profiles. ... We’re just doing static loads and basic ripple checks. That’s not enough anymore.”

    TEST ENGINEER, SERVER PSU VENDOR

  • Customer Quote Icon

    "I need to validate a mix of 2 kW, 3.4 kW, and now even 6 kW supplies. If I have to rewire the lab for every test, I’m losing half a day per unit. I need flexibility and automation — not manual rework."

    SENIOR ENGINEER, POWER SYSTEMS R&D

  • Customer Quote Icon

    "The old test benches were like running space heaters 24/7. Since switching to regenerative sources, our cooling and power bills have dropped by half.”

    FACILITIES MANAGER, POWER SYSTEMS VALIDATION LAB

Quick Model Selection Guide

Not Sure Where to Start?

Quickly find the right test hardware for your workflow — whether you're validating standalone PSUs, simulating rectifiers, or scaling up to rack-level loads in a power-constrained lab.

Use Case Recommended Models Why
Server PSU (1 to 3 kW) DP5700 Series Power Supplies:
1.5 kW or 3.4 kW models		 Compact, cost-effective, high current
PSU efficiency testing with regeneration RP5900 Series Power Supplies and
EL4900 Series Electronic Loads:
2 kW to 6 kW models		 Regenerative, eload + source pairing, automated test flow
Rectifier validation with transient loads EL4900 Series Electronic Loads
6 kW to 12 kW models		 Fast dynamic response, scalable
Rack-level or high-voltage simulation RP5900 Series Power Supplies:
paralleled units up to 192 kW		 Covers entire power path, up to 800 V
Load sinking and fault injection EL4900 Series Electronic Loads:
2 kW to 6 kW models		 Programmable electronic loads, regenerative, ideal for PSU output testing
Lab-constrained space DP5700 Series Power Supplies:
1.5 kW models		 Fits narrow racks, carts, or shared benches

Explore Products

Keysight’s new high-power ATE system supplies deliver sub-millisecond accuracy, regenerative efficiency, and seamless automation.

DP5700 High-Density DC Power Supply

DP5700 Series High-Density Power Supplies

  • 1.5 kW, 3.4 kW, 5 kW
  • Max voltage: 600 V
  • Max current: 500 A
  • Available in half-rack width and 1U sizes
  • Removable SD memory ensures data remains classified
RP5900 Series Regenerative Power Supply

RP5900 Series Regenerative Power Supplies

  • 2 kW, 4 kW, 6 kW, 12 kW
  • Max voltage: 800 V
  • Max current: 240 A
  • Available in 1U and 2U sizes
  • Bidirectional power sourcing with up to 95% of energy returned to the grid
EL4900 Series DC Electronic Loads

EL4900 Series Regenerative Electronic Loads

  • 2 kW, 4 kW, 6 kW, 12 kW
  • Max voltage: 800 V
  • Max current: 240 A
  • Available in 1U and 2U sizes
  • Bidirectional power sinking with up to 95% of energy returned to the grid

Power Without Compromise

Validate multi-kilowatt devices faster in less space — without sacrificing performance or programmability.

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High Power ATE System Power Supplies NPI

Ready to Speed Up PSU and Rectifier Validation?

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