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AC Power Sources

A selection of single and three phase AC sources are available for rental. Adjustable output voltage, current and frequency is common throughout the range.

Modern electronic products must work under all types of input conditions, not just their ideal ones. The programmability of an AC source allows many line disturbances and non-ideal conditions to be recreated within a lab environment. By analysing devices in this way, potential design faults can be identified before mass production commences.

Common waveforms are pre-installed on selected units, with the ability to edit voltage and current. Models with adjustable frequency allow grid conditions for different countries to be simulated. This is ideal for testing products which are manufactured for foreign markets. Specific grid conditions such as brownouts or ripple control signals can be recreated.

EAC-S and EAC-5302A rental power supplies have pre-installed test sequences to perform pre-compliance checks against EN 61000-4-11. These regulations define the requirements and conditions to test how power systems behave under changes to the AC mains voltage. The three standard tests are voltage dips, short interruptions and voltage variation immunity tests.

Aerospace power sources can also be accurately recreated, which commonly operate at frequencies of 400Hz and above. The three phase EAC-ST-3P is ideal for performing these types of tests at high power levels. Usefully the system has a high peak current capability and a fast response time, making it great at testing motors used within aviation.

Did you know...
  • We also provide a selection of new programmable AC sources.
  • If you require both AC source and sink functionality, four quadrant modules are available for purchase.


400Hz Three Phase AC Source


This three phase power supply is built into its own freestanding cabinet and provides an output of up to 15kVA per phase. Remote control of the system is provided via an analogue interface. A fixed output frequency of 400Hz makes the unit ideal for researching aerospace applications.

The EAC-STT supplies up to 3 x 65A continuously, though usefully has a high peak current capability for testing motor type loads (3 x 195A for up to 2ms and 3 x 97A up to 3 seconds). A very fast response time of typically <1ms for a 10-90% load step change is provided.

A variety of protection features are incorporated into the design including over current, over temperature and output short circuit. The input and output are also galvanically isolated from each other. Front panel functions can be locked out. This ensures that tests which require a continuously stable voltage are not accidentally compromised.

 Part NumberMax. PowerVoltage RangeCurrent Range 
EAC-STT 45T3 x 15kVA0-400Vrms3 x 65ADatasheet


Dual Range 3kVA Power Supply


The EAC-I has two user selectable current and voltage ranges. This provides a greater number of possible outputs within the rated nominal power of the unit. An output frequency of 47 - 63Hz is user programmable to replicate various worldwide grid networks.

Full control of the unit is provided by simple front panel operation. Various interfaces allow remote control of the PSU. A large graphical screen displays an extensive set of measurement functions. This includes effective, apparent and idle power along with voltage, average and peak current values. Power factor and crest factor values are also displayed.

 Part NumberMax. PowerVoltage RangeCurrent Range 
EAC-I 30003kVA0-135V (0-270V)0-24A (0-12A)Datasheet


Motor Driven AC Source with SD Card


Where an adjustable frequency is not required, the EAC-MT offers a technically excellent solution. The power supply is user adjustable for voltage, current and power limits up to 1500VA. The output voltage has a fast setting speed of 100V/sec. The regulation and adjustment accuracy is 1.5%.

Control of the power supply is provided via the front panel, with output values displayed on a large blue screen. A number of computer interfaces are built into the system including LAN, USB, RS-232, RS-484, IEEE 488.2 (GPIB) and analogue.

 Part NumberMax. PowerVoltage RangeCurrent Range 
EAC-MT 30051500VA0 - 300V0 - 5ADatasheet


Advanced Linear AC Power Supply


The EAC-S is a linear AC power source with a single phase output of up to 500VA. Voltage, current and frequency limits are user programmable, with operation from 500Hz all the way down to DC level possible. Standard sine, triangular and square waves can be selected. A DC offset can be combined with the AC voltage, ensuring that almost any waveform can be created.

Front panel control is provided as well as a selection of computer interfaces. An SD memory card slot allows users to create custom waveforms using simple WAV or script files via a PC. The starting phase angle can be preset when the output is activated. A host of measurement functions are displayed via the front panel including true, apparent, reactive and peak values.

 Part NumberMax. PowerVoltage RangeCurrent Range 
EAC-S 500500VA 0 - 300Vrms / 0-425Vdc0 - 6ADatasheet


AC Source with Power Analyser


The EAC-5302A is a linear single phase AC source with an inbuilt power analyser. When used in conjunction with an ETPS DC load, the PSU provides real time analysis for the input/output power and efficiency of a device under test. External power supplies can also be accurately measured, with inrush currents tests up to 200A possible.

A large LCD panel screen displays 9 different key power measurements. A front panel memory function allows frequently used test parameters to be stored and quickly recalled. All EN 61000-4-11 regulatory tests are pre-programmed. A dedicated application mode simulates the power output of devices which use a TRIAC, such as small motor controls.

 Part NumberMax. PowerVoltage RangeCurrent Range 
EAC-5302A270VA 10-150V ( 160-305V)0-2A ( 0-1A)Datasheet
Unit 14, The Bridge
Beresford Way
Chesterfield, S41 9FG
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