How Does an Aircraft Ground Power Unit Work?

While an aircraft is on the ground between flights, there is often a need for maintenance and other pre-flight preparations to be carried out while the engine remains off. This is where ground power units (GPUs) come in, serving as an external source for electrical systems to function. In this blog, we will examine how a ground power unit functions and the differences between types to aid you in selecting the best kind for your aircraft.

What Is an Aircraft Ground Power Unit Used For?

The primary function of a GPU is to supply electrical power to an aircraft’s systems when the engines are not running, ensuring that vital lighting systems, avionics, and environmental controls remain fully operational when needed. This supply of external power is essential for tasks like pre-flight checks, passenger boarding, and system diagnostics, allowing the ground crew to efficiently perform their duties.

Moreover, by providing this power, GPUs significantly reduce the reliance on the auxiliary power unit (APU) or onboard generators, which can lead to fuel savings and lower operational costs. Additionally, the use of GPUs can help mitigate wear and tear on the APU and onboard electrical systems, reducing their maintenance requirements. This capability is particularly important in scenarios where an aircraft needs power for extended periods, such as during prolonged maintenance checks, overnight stays at the airport, or before a long-haul flight.

What Are the Key Components of an Aircraft Ground Power Unit?

Central to a ground power unit’s functionality is the power generator, which converts mechanical energy into electricity, usually in the form of alternating current (AC). Most commercial aircraft utilize an AC electrical system for their operations, making it crucial for the GPU to deliver the appropriate type of power without any disruptions.

Once power is generated by the GPU, it is routed through a carefully engineered distribution system that ensures electricity reaches necessary systems within an aircraft. This distribution network consists of an intricate array of cables, connectors, and power conditioning equipment, all designed to safely and efficiently deliver power.

Accompanying these components is the control panel, which provides operators with the means to monitor and manage voltage, frequency, and current levels. Additionally, monitoring devices are integrated within the GPU to verify that it operates within safe parameters, providing alerts in the event of irregularities that could compromise performance or safety.

What Are Electric Ground Power Units?

Electric ground power units have become increasingly popular in aviation due to their efficiency and environmental benefits. Unlike traditional GPU models, which may utilize fossil fuels, electric GPUs rely on electrical energy sources like lithium batteries, making them a cleaner option for powering grounded aircraft. However, it is necessary to assess the compatibility of electric GPUs with different aircraft types, as variations in voltage and frequency can impact performance. Most modern aircraft are equipped to handle a range of power inputs, but some older models may require specific configurations.

Where to Buy Dependable Aircraft Ground Power Units

ASAP Ground Support Equipment is a one-stop source for aircraft ground power units and other essential products you need to keep your fleet up and running. We encourage you to peruse through the various catalogs that we have organized, or you can take advantage of our search engine and filters to conduct a focused part lookup. However you choose to browse, you can rest assured that everything on our website is sourced from a trustworthy manufacturer and vetted for fit, form, and function as necessary. Once you have had a chance to narrow down all that you are interested in, initiating procurement with us is as simple as submitting an online Request for Quote (RFQ) form. Our team is also available around the clock to offer competitive pricing and rapid lead times for all that you desire, so do not hesitate to get in touch with us by form, phone, or email.