Power Systems International solid state industrial frequency converters are supplied with 400Hz output or with 60Hz output for point of use application in laboratories, avionics repair workshops, hangars and for aircraft ground power in military locations and civil airports.

Our frequency converters can also be supplied in single or in parallel configuration to provide 400Hz or 60Hz power through a ring main distribution system for multiple item point of use power outlets for service installations in workshops, hangars and in hard shelters.

We also supply DC systems for helicopter starting and for auxiliary generator starting duty for hangars, repair workshops for apron use and for off shore helipads and landing platforms.

Our industrial uninterruptible power supply systems (UPS systems) are supplied to military locations and to civil airports to provide absolutely reliable and secure power for navigation aids, air traffic control systems, passenger check in computers, concourse emergency lighting, baggage handling computers, security and surveillance systems, runway lighting, public address systems, flight information displays and automated people movers etc.

Line drop compensation equipment is also supplied for use with centralized 400Hz systems to compensate for voltage reduction in the circuit feeding multiple outlets to the point of use at individual aircraft locations. The 50Hz to 60Hz frequency converters are supplied for hangar, workshop and apron use for military locations and civil airports. These converters are also used for industrial installations where it is necessary to convert frequency from 50Hz to 60Hz, for shore to ship services and where American 60Hz equipment needs to be connected to the available 50Hz mains supply.

Centralised 400Hz frequency conversion systems
The centralised 400Hz system with multiple converters connected in parallel and installed in a climatically controlled plant room would be the preferred scheme for installations at airports in geographic locations where very high ambient temperatures prevail. Centralised 400Hz power distribution systems are ideal for the large multi point installations. The frequency converters are configured in parallel to share equally the total load connected to the distribution system. Line drop compensators or transformers are used at point of power take off to the aircraft to enable the distribution system to deliver a precisely regulated voltage at 400Hz to any aircraft regardless of the number of aircraft connected to the distribution system.

Single module 400Hz frequency converters
The single module 400Hz converters can be used for installation adjacent to the passenger loading bridges or in workshops, hangars and other point of use applications adjacent to the aircraft parking place where a centralised system with distribution would not be a cost effective alternative consideration. We can also supply and install a variety of telemetering, remote monitoring, surveillance and systems that allows full observation of critical functions of the operational behaviour of the frequency converters, the interfacing with the connected load and the power consumption at the point of use.
Frequency converters located adjacent to every aircraft stand is a very cost effective and flexible arrangement especially on smaller installations. The single module frequency converters are simple to connect to normal available mains sources and they can be located close to the aircraft point of use without the need for pits or other apron excavation work.

We have supplied our 400Hz frequency converters, 60Hz frequency converters and UPS systems to Royal Air Force locations in the UK and other Commonwealth countries; we have also supplied our products to the defence forces of Oman, Kuwait, Qatar, Bahrain and the UAE.
Power Systems International design, offers design consultancy, manufacture and project management for centralised frequency converter systems and power distribution for connecting into existing or new apron pit systems. We also can supply automatic cable handling and retrieval systems for passenger loading bridge mounting or the flexible Z fold crocodile systems for use at the apron point of aircraft parking and ground service.

400Hz frequency converters and 60Hz frequency converters are available in capacities of 2kVA to 25kVA with single phase output and from 7.5kVA to 25kVA with three phase output designed for workshop and hangar use. Other 400HZ frequency converters with three phase output are available from 30kVA up to180kVA, the 180kVA 400Hz frequency converters are provided with dual output terminals intended for supplying large aircraft provided with dual input feed points.
The frequency converters with three phase 60Hz outputs are available from 7.5kVA to 450kVA and they can be configured to operate in parallel.

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