Programmable AC Power Sources 3kVA ~ 67kVA (DC+0.01Hz ~ 1kHz)

N4A source_User Manual_1. 09 The N4A range of Programmable AC Power Sources provide breakthrough low distortion performance previously unseen from a “Switched Topology” Source, the implementation of a proprietary “6 legged output stage” effectively creates a very high switching frequency for waveform construction – thus providing lower distortion. The N4A offers the unique ability to generate both high frequency power waveforms up to 1kHz as well as low frequency power waveforms down to 0.01Hz. This feature enables the engineer to simulate low frequency power devices such as wind turbines with very low fundamental frequencies. Up until now, switching topologies have suffered from higher distortion levels than that of the more established Linear approach. The introduction of the N4A power sources signifies a new chapter in low distortion AC Power Source technology.

The N4A AC power source range offers compliance to a range of international EMC standards including IEC61000-3-2, IEC61000-3-3, IEC61000-3-11, IEC61000-3-12, IEC61000-4-11 and IEC61000-4-13. For further information regarding these standards, please see our EMC Test Systems product page.



Output Power


Output THD %

Output Phases

Maximum Output Current (Continuous)

Maximum Output Current (3 second inrush)

N4A03 3kVA 1kHz Full Signal, 15kHz Small Signal Better than 0.3% 1 Phase 10Arms 20Arms
N4A06 6kVA 1kHz Full Signal, 15kHz Small Signal Better than 0.3% 1 Phase 20Arms 40Arms
N4A18 18kVA 1kHz Full Signal, 15kHz Small Signal Better than 0.3% 3 Phase (Optional 1 phase output) 20Arms/phase 40Arms/phase
N4A30 30kVA 1kHz Full Signal, 15kHz Small Signal Better than 0.3% 3 Phase (Optional 1 phase output) 32Arms/phase 64Arms/phase
N4A67 67kVA 1kHz Full Signal, 15kHz Small Signal Better than 0.3% 3 Phase 75Arms/phase 100Arms/phase

Product Images

Features & Benefits

N4A AC Power Source Product Overview
Very Low Distortion 0.1% Typical
Fully Compliant to IEC61000-3-2, IEC61000-3-3, IEC61000-3-11, IEC61000-3-12, IEC61000-4-11, IEC61000-4-13 (Depending upon model) Satisfies all IEC requirements
Intuitive User Interface “Quick Keys” and alpha numerical keypad
Very wide frequency range covering 6 orders of magnitude (0.01Hz ~ 1kHz) DC & 0.01Hz to 1kHz
Colour Display Real time monitoring and waveform display
200% Current Overload Capability (N4A67 133%) 3 Second 200% Overload Capability
Power Output up to 67kVA Contact us for further information
Short Circuit Output Protection Standard safety circuit
Custom Waveform Generator, Mathematical Harmonic Computation Capability Add Harmonics Mathematically
Upload waveforms from RAW data Load waveforms via RS232, LAN or USB

The N4A AC power sources feature an extremely flexible waveform generator capable of mathematical waveform generation, data point waveform upload and many sequencing functions. Traditionally, switching topologies have struggled to provide total harmonic distortion (THD) figures below 2%. The N4A “6 legged topology” provides less than 0.3% THD and typically 0.1%, the N4A range of AC Power Sources should be considered the best value power generator on the market. Ranging from the N4A06 6kVA model (300Vrms, 20A) to the N4A67 67kVA model (67kVA, 75A /phase) – the N4A will suit a wide range of applications including;

  • Aerospace
  • Renewable Energy
  • Compliant to IEC61000-3-2/12 and IEC61000-3-3/11 Harmonics and Flicker Testing
  • Compliant to IEC61000-4-11 Voltage Dips and Interrupts immunity test standard
  • IEC61000-4-13 harmonic and inter-harmonic susceptibility test standard
  • PWM Inverter Drive Development
  • Automotive
  • Standby Power
  • Battery Development


N4A_AC_Power_Source_Brochure High res PDF, 1,000kb
N4ASoft_Brochure PDF 815kb
EMC_IEC61000_Test_System_Brochure PDF, 3,334kb



N4A source_User Manual_1. 11 PDF,  3,104kb
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Note: User manual and Comms manual provided in combined document
 Single phase start-up guide  PDF,  117kb

N4A Programmable AC Power Source Options, Software and Accessories

COMMS_ICON Communications Interfaces:
  • Standard: LAN, USB and RS232 Communication Ports
PROBE_ICON Associated Options:
EXTENSION_ICON Extension Port and Accessory Options:
  • RS232-USB Converter
CONNECTOR_ICON Leads, Connection and Interface Options:
  • Universal Breakout Box - Single Phase 10Arms Universal Breakout box
  • RS232 Cable (Supplied as Standard) - 9 Pin null modem cable
  • USB Cable (Supplied as standard) - 2m long A Male to B Male USB Cable
CALIBRATION_ICON Calibration and Documentation:
  • Standard Recalibration (Utilizing ISO17025 traceable instrumentation) - N4A06 (Single Phase Power Source)
  • Standard Recalibration (Utilizing ISO17025 traceable instrumentation) - N4A18/N4A30/N4A67 (Three Phase Power Source)
  • Spare set of user manuals - Hard copy of user and communications manual
PC_ICON PC Software (Free of charge):
  • N4ASoft - Programmable AC Source Control Software

Application Notes and Related Articles

APP026 - Technical Guide to Flicker Measurement; Electromagnetic Compatibility IEC61000-3-3: 2013

N4A Programmable AC Source Full Specification

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