AC Electronic Load – 4600 Series

AC Load for UUT Reliability Testing, UPS Testing, Vehicle to Grid (V2G) Testing, & More!


  • 6 sizes – 3 to 36kW, 30 – 360A, 50 – 350V
  • Single and 3-phase configurations
  • 12 high-accuracy internal measurements
  • 100-step macro for per cycle loading changes
  • User-defined waveforms
  • CC, CR, CV, CP, SC, UPF and CNL emulation modes
  • PC control using Lab VIEW and IVI drivers
  • LAN, RS232, USB communication interface
  • PC softpanel GUI with current, voltage & power waveform display
programmable ac electronic load 4600 series


This AC Load (4600 Series) is designed for test applications that require linear and non-linear AC loading in several emulation modes with Power and Crest Factor control. This programmable versatility allows testing with a wide variety of potential field operating conditions to assure unit-under-test (UUT) reliability. Products tested include uninterruptible power supplies (UPS), AC sources, inverters, switches, circuit breakers, fuses and connectors.

Advantages and Benefits


  • Field-proven reliability
  • Simplifies automated test stand development
    - Triggerable set & measurement
    - True short circuit mode
    - Built-in SW watchdog
  • Software tools to shorten test development time
    - PC-based Softpanel GUI with scope display
    - Supplied LabVIEW & IVI-C/IVI-COM drivers
    - Optional: AC Load or emPower® test sequencers


  • Field upgradeable (3kW/ф steps)
  • Built in features reduce cost & simplifies setup
    - Requires fewer additional test devices
    - Fewer devices simplifies test stand wiring
  • Sizable for 1ф & 3ф configurations

AC Load - 4600

Chart: Unity Power Factor Wave 4600 Series - NH Research (NHR)
Utility Power Factor Wave
Chart: High Crest Factor Wave 4600 Series - NH Research (NHR)
High Crest Factor Wave
Chart: Leading Power Factor Wave 4600 Series - NH Research (NHR)
Leading Power Factor Wave
Chart: Lagging Power Factor Wave 4600 Series - NH Research (NHR)
Lagging Power Factor Wave

Wide Range of Power Levels

The 4600 Series AC Electronic Load is now offered in 6 power levels between 3 and 36kW. Any unit can be field expandable in 3kW increments to address future higher power needs. Contact NHR for any loads higher than 36kW.

Testing Applications


  • UUT Reliability Testing, UPS Testing, V2G
  • Grid Utility Test, Inverter Test
  • Linear & Non-linear Loading, Inductive & Capacitive Loading Requirements
  • True Short Circuit Test

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