AC Power Source – Model 9420

AC Source with HiVAR® Technology Ideal for ATE use in Aviation, Aerospace, Defense, Military/Mission Critical Testing, Manufacturing Test, Research & Development & More!


  • Voltage Range – 175/350VRMS, 200/400VDC
  • 7 models – 8kW/21kVA to 96kW/252kVA
  • Unique configuration flexibility provides for single, split, three-phase operation plus full-power DC
  • HiVAR design eliminates derating nominal power due to reactive loads
  • Frequency – 30 to 880Hz
  • High-resolution waveform digitizer & scope display
  • Precision ultra-low current measurements
  • Seamless, constant-power operating envelope
  • Built-in 9” touch-panel user interface for manual control & measurement display
  • Graphical waveform editor for user-defined waveforms
  • High-level line disturbance programming Macros
  • External PC option to host NHR emPower® Test Sequencer
  • Alternate programming in LabVIEW, native SCPI, & other IVI-compliant languages
  • Improved power density results in half the panel height of a traditional AC source


The Model 9420 AC Power Source redefines selection of an AC Source by addressing how to compensate for reactive power from capacitive or inductive elements in the load. Often overlooked when sizing an ac source, reactive power negates some portion of nominal VA power in order to arrive at true power (Watts) that does the real work. Traditional AC sources list only their VA rating leaving it up to the user to figure out how much true power remains after reactive power reductions. In many cases that reduction is substantial and then requires selecting a much larger VA-rated source than originally anticipated. The increased cost and size penalties are often considerable.


  • Operating envelope of 9420 significantly extends the envelope of similarly sized & priced traditional AC sources.
  • HiVAR: more reactive power per kW<
  • Simplifies automated test stand development
    - Software selectable 1, 2, or 3 Phase operation
    - Isolated digital inputs & outputs
    - Built-in SW watchdog & safety limits
  • Software tools to shorten test development time
    - PC-based tools & NI certified drivers
    - NI certified LabVIEW & IVI-C/IVI-COM drivers
    - Optional: Enerchron test sequencer


  • Field upgradeable to higher power
  • Fully emulate any utility/grid condition
  • Simulate non-ideal Phase phase angles (A-B & A-C)

Model 9420 AC Power Source Specifications

Model # 9420-8 9420-12 9420-24 9420-36 9420-48 9420-72 9420-96
AC Output Programmability
Phases/Output Channels Single, Split-Phase Single, Split or 3-Phase
Voltage (LR,HR) 10-175, 350VRMS L-N (split-phase limited to 250V max)
Current Limit Set Ranges (per ф) 6, 30A (2ф) 6, 30A (3ф) 12, 60A (3ф) 18, 90A (3ф) 24, 120A (3ф) 36, 180A (3ф) 48, 240A (3ф)
Current Limit Set Max (per Source) 12, 60A (1ф) 18, 90A (1ф) 36, 180A (1ф) 54, 270A (1ф) 72, 360A (1ф) 108, 540A (1ф) 144, 720A (1ф)
Power Limit Set Max (1, Split, 3ф) 8, 8kW 12, 8, 12kW 24, 16, 24kW 36, 24, 36kW 48, 36, 48kW 72, 48, 72kW 96, 64, 96kW
Maximum Apparent Power 21kVA 31.5kVA 63kVA 94.5kVA 126kVA 189kVA 252kVA
DC Output Programmability
Voltage Ranges (LR,HR) 10-200, 400VDC (< 800mV RMS Ripple)
Current Limit Set Max (per Source) 0-12, 60A 0-18, 90A 0-36, 180A 0-54, 270A 0-72, 360A 0-108, 540A 0-144, 720A
Power Limit Set Max (per Source) 0-8kW 0-12kW 0-24kW 0-36kW 0-48kW 0-72kW 0-96kW
Form Single Chassis Single Chassis Single Cabinet Single Cabinet Single Cabinet Double Cabinet Double Cabinet
Size (HxWxD) 15 3/4 x 19 x 28"/
400 x 483 x 711mm
15 3/4 x 19 x 28"/
400 x 483 x 711mm
46 x 23 x 30"/
1168 x 584 x 762mm
49 x 23 x 30"/
1981 x 584 x 762mm
61 x 23 x 30"/
1981 x 584 x 762mm
78 x 46 x 30"/
1981 x 1168 x 762mm
78 x 46 x 30"/
1981 x 1168 x 762mm
Weight 150lbs/
* The above specifications show typical configurations & subject to change. Contact NH Research, Inc. for further information.



Data Sheet
App Note: Microgrid Test Solutions Across the Distributed Energy Network
App Note: Regenerative Loads & Sources - Removing the Cost of Heat
Guide: Renewable Energy & Micro-grid Test Solutions
Webinar: Microgrid & Electric Vehicle Test Solutions
Power Lines Field

Testing Applications


  • ATE Applications: Regulatory Test
  • Power-line Disturbance
  • Power Conversion: AC/DC Converter Test
  • Charger, UPS, Power Distribution Unit Test
  • Data Center/Service
  • Energy Star - Low Current Range
Compliant with UL1741, IEEE1547 and similar grid-tied standards world-wide.

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