Regenerative 4-Quadrant AC Load – Model 9430

Regenerative AC Load that Simulates any Inductive, Capacitive, or Resistive Load.


  • 8 Sizes – 4 to 96kW
  • Single, Split or Three-Phase programmable
  • 10 to 350VAC
  • 30 to 880Hz
  • DC operation to 10 to 400VDC
  • Reactive power capability 2.6 x Real Power
  • Sink power regenerated back to facility with >90% efficiency
  • Power factor range: -1 to +1
  • Crest factor range: 1.414 to 4.000
  • High-resolution waveform digitizer
  • 9” Touch-Panel user interface
  • High power density/minimum rack space
Regenerative AC Load Model 9430 - NH Research (NHR)


The 9430 is a 4-quadrant, regenerative AC load that is current-regulated with selectable phase inputs/outputs and a built-in waveform digitizing measurement system. In the sink mode, it sends power back to the facility mains rather than dissipated as heat. The 9430 can simulate almost any linear or non-linear load. Applications include testing of Vehicle to Grid (V2G), solar and grid-tied inverters, UPSs, AC sources, rectifiers, circuit breakers and fuses.

AC Load 4-Quadrant Operation

The most unique feature of the 9430 AC Load is the ability to operate in all 4-quadrants. This bi-directional capability significantly expands AC load simulation relative to 2-quadrant AC loads. More specifically, the 9430 AC load allows creating the reverse current caused by inductive or capacitive loads (low power factors); namely sending power back to the UUT (source) during part of the AC cycle. In this manner, the 9430 accurately duplicates real-world reactive electrical power flows.

HIVAR design provides reactive loading without derating True Power

This advanced design feature allows for testing high reactive load input power without the customary reduction of true power (Watts) normally required with conventional loads.

Several Emulation Modes

To provide testing under the broadest range of loading conditions, the 9430 AC Load will operate in several emulation modes including Constant Current (CC), Constant Resistance (CR), Constant Power (CP) and Constant Apparent Power (CS).

User-defined Waveforms

In addition to programmable power and crest factors, the 9430 AC Load is capable of creating non-linear waveforms using a unique graphics editor. This editor allows starting with a straight line or modifying a generated waveform based on current, power and crest factor.


  • Worlds 1st full-featured 4-quadrant AC Electronic Load
  • 100% Si-C based design with hi reactive current capabilities (HiVAR®)
  • 350VAC l-n up to 880Hz & 400VDC
  • Multiple Loading Modes including:
    – Constant Current (CC) / Power (CP) / VA (CS)
    – Constant Resistance (CR)
    – Constant Series RL (CRL)
    – User definable current waveforms
  • Simplifies automated test stand development
  • Built in measurement system:
    – Triggerable set &ammp; measurement
    – 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


  • Regenerative, returns greater than 90% of power to the facility, which provides significant electrical savings.
  • Field upgradeable to higher power
  • Fully emulate any power usage profile
  • Simulate non-ideal & transient phase currents

Model 9430 Regenerative AC Load Specifications

Model # 9430-4 9430-8 9430-12 9430-24 9430-36 9430-48 9430-72 9430-96
AC Loading Programmability
Phases/Output Channels Single Single, Split-Phase Single, Split or 3-Phase
Input Voltage (LR,HR) 10 - 175, 350VRMS L-N (30Hz - 880Hz)
Current Limit Set Ranges (per ф) 6, 30A (1ф) 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 load) 6, 30A (1ф) 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) 4kW 8, 8kW 12, 8, 12kW 24, 16, 24kW 36, 24, 36kW 48, 36, 48kW 72, 48, 72kW 96, 64, 96kW
Maximum Apparent Power 10.5kVA 21kVA 31.5kVA 63kVA 94.5kVA 126kVA 189kVA 252kVA
DC Loading Programmability
Input Voltage 10-200, 400VDC
DC Loading Modes Constant Voltage (CV), Constant Current (CC), Constant Power (CP), Constant Resistance (CR) in any combination
Current Limit Set Ranges 0-6, 30A 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 0-4kW 0-8kW 0-12kW 0-24kW 0-36kW 0-48kW 0-72kW 0-96kW
Forms Chassis Chassis Chassis Single Cabinet Single Cabinet Single Cabinet Double Cabinet Double Cabinet
Dimensions (HxWxD) 15 3/4 x 19 x 24"/
400 x 483 x 610mm
15 3/4 x 19 x 24"/
400 x 483 x 610mm
15 3/4 x 19 x 24"/
400 x 483 x 610mm
49 x 23 x 30"/
1245 x 584 x 762mm
61 x 23 x 30"/
1549 x 584 x 762mm
78 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 145lbs/
* The above specifications show typical configurations & subject to change. Contact NH Research, Inc. for further information.



Data Sheet
Guide: Renewable Energy & Micro-grid Test Solutions
App Note: Regenerative Loads & Sources - Removing the Cost of Heat
Webinar: Microgrid & Electric Vehicle Test Solutions
Webinar: AC Load Testing Fundamentals
Utility Grid Testing - NH Research (NHR)

Testing Applications


  • Full Line Disturbances at Any Power Factor
  • Grid Utility Test, Inverter Test, UPS Test
  • EV Load Testing
  • Switch, Fuse Test
  • Linear & Non-linear Loading, Inductive & Capacitive Loading Requirements.

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