Obviously those firms or companies which produce things like engines and generators will market these products. But there are some specialized firms which include the aircraft ground power unit manufacturer which has services being accessed by specific places. The designation for use in airports will often mean that the items being manufactured have unique features.
These unique features will often be special for use in airports or air terminals and surrounding areas. There are many kinds of machines that are used specifically here, and usually they belong to more generic types. However, the types in use for these places will have more advanced features in things like mobility, use, power and work delivery systems.
The generator in question will need mobility at any given time, and should be usable anywhere in an airport. For instance, it can be towed by trucks, and so should be light enough to be towed and powerful enough to provide heavy duty jobs. For instance, it might need to provide power for engine maintenance work.
The engine being discussed is typically powerful, especially when it belongs to an airliner. These are big ones that need to generate so much to power up planes and keep them flying and traveling long distances. The power needed to clean it or blow out its insides free of debris is on a higher level than average generator concerns for things like buildings.
This means things like added features for heavy duty work, when these machines can be in service for twenty four hours. Also, they might have added installs for making them more portable, and many even have some wheels attached. This is only to accommodate or make the towing process much faster to do.
These may sit on the ground too and can be in use for some vital part of the airport. The units are varied so that they are able to address all kinds of energy needs within the place. They can power up emergency lighting fixtures during bad weather and can run the tower machines when there is an outage.
The thing is to keep energy available all the time for anything. The machines and aircraft all need some kind of energy all the time, and energy generation may be from the grid and from the ground units. Manufacturers therefore make their models more powerful than are usual for those who use generators.
These are items that are costlier therefore but the operations and the companies running aircraft and transport or freight can count on these to keep their business going at all times. That means that they are vital here. And anytime that one is under repairs, there may be extra units in storage that can replace it.
The number of units available depends on the needs and the dimensions of a terminal. For smaller ones with lighter aircraft, several will do the job handily. But for larger places, these have to be numerous enough to answer for all contingencies in operations for aircraft and for the terminal itself.