JTL28D2 the above standard, diesel powered 28.5 VDC Ground Power Unit (GPU) that will support all of DC aircraft power needs with the latest technologies incorporated to simplify operations and maintenance procedures, allowing the operator to sensationally reduce the costs associated with operating ground power units. We accomplish it by using Perkins 1104 series engines, known for their reliability in the GSE community, combined with low profile design, 5th wheel type steering for superior manoeuvrability on congested ramps, non-destructible frame and enclosure combined with durable control panel will assure longevity and durability. JETALL GPU line of products meets both current and future Emission Standards.


  • Perkins, diesel 1104 series, 4 cylinders, 73BHP
  • Compliance with EPA, Tier 2 regulations
  • 12 VDC battery system
  • Low oil pressure shutdown
  • Intake air restriction indication
  • Electronic governor system
  • Automatic cold weather start assists system


  • Rating: 25 kW at 0.8 PF, adjustable ± 10-15 %
  • 3 Phase, 4 wire Wye connected grounded neutral, revolving field, brushless, self-cooling, single bearing rectifier assembly, insulation class H
  • Output: 28.5 volt DC, 800 amps continuous, 2,200 amps momentary


  • 1,200 amp rated load for 30 seconds


  • Voltage regulation: ±0.5% no load to full load


  • Over-voltage: 32 volts disconnect in 5 seconds.
  • Under-voltage: disconnects below 22.1 volts in 7 seconds
  • Current limiting adjustable 300 amps and up
  • Line drop compensation assures proper voltage at aircraft connection


  • Powder Coat paint provides excellent weather resistance, flexibility and adhesion, plus a strong resistance to chemical agents such as glycol, Skydrol and Jet A
  • Standard color is High Gloss White
  • Custom colors require a paint chip or swatch for accurate color match


  • Weight: 1,280 kg (2,820 lbs.)
  • Width: 163 cm (63”)
  • Height: 153 cm (57”)
  • Length: 264 cm (103”) tow bar up



  • Meters: coolant temperature, RPM, hour meter, oil pressure, voltmeter, fuel quantity, fault indications
  • Indicator lights: engine circuit on, air cleaner restriction, high coolant temperature, low oil pressure, engine stop delay action, low fuel
  • Switches: engine start, engine stop, panel lights
  • Delayed shutdown for turbocharger protection



  • Meters: ammeter and voltmeter
  • Indicator lights: contactors on, current overload, over-voltage, under-voltage
  • Switches: output contactor control, test / reset


  • Transformer-Rectifier pack for 28.5VDC with current limiting, 800-amp continuous load and 2,200 peak; output cable, 10 meters
  • Transformer pack for 208 volt AC, 50/60Hz 3 phase, 120 amp continuous load, switch box, 10 meter output cable
  • AC outlet 110/220 volt, 20 amps kit
  • Tow and running lights
  • Cold weather kit (120 volt)
  • Low fuel level, warning kit
  • Low coolant level, warning kit
  • One (1) 9.2 meter, 28 volt output cable
  • Amber flashing beacon mounted on roof
  • Weatherproof gauge mounting