subject: The Primary Concepts Behind Ground Power Units [print this page] A ground power unit (GPU) is a form of ground support equipment (GSE) that is used to power an unpowered aircraft while it is parked on an airport terminal runway, an airfield, or everywhere on the ground. It's just like another maritime power or shore power sources which are used for ships that are moored on port and have their engines turned off. GPUs are considered as vital ground handling and aviation support equipment because they enable airport handlers and crew to service aircraft without the demand for running them, therefore conserving expensive fuel costs. Ground power units are also used for aircraft screening and maintenance procedures that require the momentary use of hydraulic systems and aircrafts electronic. Moreover, they are used to power up the aircraft and place it into its preparatory stages; this is where the aircrafts auxiliary power unit (APU) is switched on. Normally, an aircraft uses its APU to power its electrical, electronic, hydraulic, and associated programs; this also applies its APU to start its motors and assist them run on their personal power.
Ground power units both are employed in the civilian and military aviation industries, where they permit jobs to be done that require a continuous and prepared supply of outdoors energy. Civilian uses can include hangar transfers and parking, resupplying of aircraft fuel, cargo or material administration, and traveler compartment upkeep work. They can be quickly sited or be assembled for easy transport. They usually come equipped with the essential tools and equipment for electricity transfers and generation such as cables, converters and inverters, switch gears, mobile generators, high-power batteries, and electrical management and protection mechanisms.
GPUs, as mentioned earlier, can be either mobile or stationary, with respect to the needs of the airport or airbase they are servicing. Those used for industrial airports and comparable facilities are normally capable of low voltage result; those used for army airbases and aircraft installations, on the other hand, turn out higher currents that allow them to deal with any power emergencies that could occur.
Normally, ground power units are operated by batteries, although there are diesel powered variants which are meant for heavy-duty purposes (generally by the military and by air terminals with higher passenger capacities). They are able to produce both alternative current (AC) and direct current (DC); the former may be anywhere from 115 to 200 volts with a graded frequency of 400 Hz, while the latter may be in the vicinity of 28 V. They can produce electricity with current ratings that vary from 1200 amperes to 6000 amperes, depending upon the mass and needs of the aircraft they service. Battery-powered GPUs are desired over the diesel powered variations because they are more efficient, more transportable, and need fewer fuel and upkeep expenses.
Whenever you board your flight, take a moment to watch over the hangar and check for any ground power units close by. Once you have read this article, you'll now have a higher gratitude of these machines and the amount they help with our aircraft business.
