400Hz Frequency Converters | Aircraft Ground Power Units

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Solid State Aircraft Ground Power Units (GPU)

What is a GPU?

Aircraft cannot use the domestic 50Hz or 60Hz power when on the ground. Consequently, aircraft will utilise ground support equipment (GSE) from the airport apron to switch service loads and navigation avionics to the correct frequency. PSI’s 400Hz frequency converters help fulfil this requirement.

The Benefits of GPUs

The major benefit to using “point of use” 400Hz frequency converters is the energy efficiency. The GPU only needs to be switched on when it is needed. As a result, there is no need continue running the aircraft’s engines and the on board turbo generator auxiliary power unit (APU).

The 400Hz frequency convertor eliminates noise and air pollution, unnecessary fuel consumption and contributes to the reduction of maintenance needed on the APU, generators and batteries.

400Hz Frequency Converters | GPU

Our 400Hz frequency converter GPU range includes outdoor all weather units that can be used for military airfield and airport applications. These compact converters can be fixed to the gantry of a passenger loading bridge.

They can also be hung underneath the walkway, or the vertically configured systems can be installed at a convenient place close to aircraft. We also have indoor versions of the GPU for use in maintenance hangars, avionics workshops, hard shelters and simulator applications.

We can supply either fixed or mobile units mounted to a trailer in vertical or horizontal configurations. Contact us today for more information. You can also view our datasheet for a technical specification.


Combi Unit 400Hz/28v DC

We can offer a combination converter with both 400Hz power and an additional 28V DC output. Ideal for use on helipads on board drilling ships and off-shore oil & gas platforms. We also supply flexibile aircraft power cable, connectors, reeling systems and service pits for stowing the cables – delivering “point of use” power to all types of aircraft.
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