28VDC and 115VAC 400Hz power supply powered by diesel engine, mounted on an electric truck.

Main Features

The self propelled ground power unit consists of a truck steel structure, where a 400 Hz generator driven by a diesel engine and relevant electric power circuit are installed.

The truck is equipped with an electric motor traction suitable for a maximum running speed of 30 Km/h.

The brake circuits are different on the two axles: on the front axle disk brakes are mounted while drum brake are on the rear axle. Parking brake: the rear wheels are equipped with drum parking brakes hand driven (operated) by a lever mounted in the truck cabin.

All components are protected by removable covers with hatches to let the access to the internal parts.

Diesel driven, the GPUs power outlet rating is: 115/200 Vac / 400 Hz / 100 kVA; 28 Vdc / 1000 A; the two electric outputs are available at the same time.

Protection/Safety Devices

The Self-propelled GPU is equipped with the following protection / safety devices:

• Overvoltage / undervoltage (1st threshold) on AC output
• Underfrequency (1st / 2nd threshold) on AC output
• Overvoltage on DC output
• Overcurrent on DC output

All the above mentioned functions are implemented on digital cards, fully programmable.  The methods and application are in compliance with STANAG 3457, Ground Electrical Power Supply For Aircraft, and MIL-STD-704F, Aircraft Electrical Power Characteristics.

Instrumentation

AC moving iron ammeter, connection on CT/5A, scale depending on GPU’s In;

AC moving iron voltmeter, direct connection, scale 0 – 300 V;

AC frequency – meter, scale 370-430 Hz, with frequency/voltage converter 1mA nominal rating;

DC moving coil ammeter, connection on shunt rated at 50/100 mV voltage drop, scale 0-800/1600 A;

DC moving coil voltmeter, direct connection, scale 0-40 V.

Diesel Engine

Deutz, BF6M 1012C type, 6 cylinder 122kW continuous at 2.400 Rpm equipped with electronic speed control card, operative with common diesel fuel or aeronautic JP8 (compliance MIL-T-83133, NATO code F-34) without any change.

Ambient operative temperature: –30°C + 52°C.

The diesel engine is able to start, without external aid, in ambient temperature below -30°C. Starting motor: 24 v, 4KW. Ancillary alternator: 80 A at 28 V. N° 2 battery of 100 Ah.

Accessories

Standard: 28Vdc output power cable (length 10 m) with plug according to Stanag 3302, 115Vac 400 Hz output power cable (length 10m) with plug according to Stanag 3303