Ground Support Equipment (GSE)
Ground Power Units (GPUs) for Aerospace, Avionics and Airports
When parked on the ground an aircraft cannot use the normal 50Hz (or 60Hz in America) mains power as it needs 400Hz power. As a result airports need specialised ground support equipment (GSE), also known as ground power units (GPUs), to allow the aircraft to function whilst on the ground. Our compact dimensioned frequency converters can be fixed to the gantry of a passenger loading bridge or can be hung underneath the walkway or simply fixed to a convenient place close to the aircraft.
The advantage of these GSEs is that it prevents the on board turbo generator APU being run which produces a lot of noise and air pollution. Our ground power unit is connected to the normal 3 phase mains power source and delivers an output of 200V 3 phase 400 Hz power to the aircraft through a special flexible cable. The converter is only switched on when the aircraft needs the power, it also has a built in feature that allows the converter to synchronise with the on board aircraft power system so the lights, air conditioning system and the avionics continue operating during the change over from aircraft power to the external converter power.
This form of "point of use" ground power system is very energy efficient, the converter is only switched on when needed and is more flexible than the earlier generation concepts of centralised 400Hz systems on older airports that operate large converters in parallel drawing continuous power from the mains in anticipation of an incoming aircraft docking to connect to the distribution circuit. Our new product goes one step further; we now can deliver a dual system built into a single enclosure with two 90kVA output circuits so the new generation of wide bodied aircraft can pick up power with two cables from a single location.
We can also provide a combination system in a single enclosure with a 3 phase 200V 400Hz output and with a secondary output of 28V DC 600Amps with peak of 2000A for helicopter engine starting and battery charging in a vertical configured compact dimensioned assembly that can be installed in a maintenance hangar or on the apron of an airport, the combination unit can also be built in the horizontal format for mounting under the passenger loading bridge and operate in conjunction with our automatic cable reeling unit.
The 90kVA, 120kVA and 180kVA systems can be supplied in outdoor or indoor enclosures with all weather protection for fixed or mounted on a trailer for mobile applications.
This GSE provides all types of aircrafts with 400Hz power. The frequency changer converts 50Hz or 60Hz electricity from the mains into the higher frequency 400Hz power needed to power aircrafts.
Our frequency converters utilise the latest in power conversion switching technology to provide an extremely flexible and cost effective system designed for outdoors “point of use” installations. We offer both fixed and mobile units.
See more information about our 400Hz Frequency Converters
These GPUs, also known as Transformer Rectifier Units (TRUs), are designed to provide 28.5V DC power to aircrafts for engine starting and battery charging.
Suitable for helicopters, light civil aircrafts and military jets the start and battery charging units can be use indoors or outdoors. Typical areas of installation are at the ‘point of use’ at aircraft parking stands, in maintenance hangars; avionics workshops; aircraft manufacture and training simulators.
Our 28.5V DC GPUs can be connected to 50Hz or 60Hz power source and can be supplied as trolley mounted or fixed power systems.
See more information about our 28V DC Helicopter Starting and Battery Charging Ground Power Units
Ground Power Cables & Connectors
The aircraft ground handling environment presents harsh duty conditions for cables. The use of the correct type of cable is of vital importance to ensure a secure and safe power supply to the aircraft when it is on the ground. The airport environment subjects cables to mechanical damage from baggage trolleys and other vehicles, the cables are also subjected to abrasion when dragged over the concrete apron or uncoiled from pits and reelers. The Power Systems International cables are made from the highest quality materials and are designed with mechanical strength, conductor insulation and meet the electrical criteria for current carrying and voltage drop.
Our flexible cables can withstand some abuse, rough handling and are impervious to kerosene, deicing chemicals, mineral oils and other spillages. They are also designed to maintain their flexibility in sub zero temperatures and in the intense heat of summer in the Middle Eastern airports and military air-fields.
We supply fully prepared 400Hz cable harnesses using twisted flexible cables provided with control wires and fitted with an aircraft power connector and can be delivered with an optional feature allowing remote control of the frequency converter output.
Fully prepared flexible cable harnesses are also available for 28V DC for engine starting and battery charging. These harnesses are also provided with a standard aircraft connector with or without the remote control feature.
Cable Reelers & Hatch Pits
We also supply cable reeling systems and service pits for use with 400Hz flexible cables or for 28V DC cables. The electrically powered cable reelers can be supplied with fixings to mount under passenger loading bridges or can be provided with floor stands for use in hangars and maintenance workshops or underslung from mezzanine floors.
A manually operated cable reeler system is also available for the 400Hz cables and 28V DC cables for use in the locations where mains power is not readily available.