Medium and heavy helicopters electric power supply during maintenance operations and starting of turbine engine.

Main Features

Ground Power Unit, Diesel driven, for 28Vdc output, mounted on a steerable trailer (steel structure) compliant with MIL-M-8090F, equipped with four pneumatic wheels and a towing bar for a maximum speed of 30 Km/h.

The GPU in addition to the main outlet at 28Vdc is normally equipped with the auxiliary output at 28 Vdc (socket according to CEI standard), 2 poles, 25A max.

Electrical Output

DC Output: 28Vdc 500A continuous, 1300A for 2sec

Connectors compliant with STANAG 3302

DC voltage adjustable range: 24-32 Vdc

Auxiliary outputs: 28 Vdc (socket according to CEI standard), 2 poles, 25A max.

Protections/Safety Devices

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

• Overvoltage
• Undervoltage
• Overcurrent

All the above mentioned devices are implemented on digital cards, fully programmable.

The methods and application are compliant with STANAG 3457, Ground Electrical Power Supply For Aircraft and MIL-STD-704F, Aircraft Electrical Power Characteristics.

Instrumentation

DC digital ammeter, range 0 ÷ 500 A, peak reading up to 1350A (up to 10 sec).

DC digital voltmeter, direct connection, scale 0-40 V.

The diesel engine instrument: hour counter / RPM readout / fuel level.

Diesel Engine

Deutz BF4M-1013, 4 cylinder 90kW continuous at 2.000 Rpm, equipped with electronic speed control, allowed fuel are common diesel fuel or aeronautic JP8 (compliance MIL-T-83133, NATO code F-34) without any change.

Ambient operative temperature: –20°C + 50°C.

Certified DIN ISO 3046-1 / EU9768 STEP1, emission opacity lower than requirement stated in ECE R24.

Autonomy: up to 8 hours at engine rated power.

Accessories

Standard: 28Vdc output power cable (length 10 m) with plug according to Stanag 3302

Test stand textile cover wood crate for transport; O&M manual, CoC, Test report, DC instrument calibration report.

On request: cold starting kit up to -32°C or up to -40°C.