Details

The GPU-409 Ground Power Unit features a compact design with full-size performance which allows for easier handling and better mobility near aircraft. It features a brushless, high efficiency generator running at an optimized 1846 RPM providing improved fuel efficiency and reduced sound level while ensuring rapid transient response and exceptional frequency regulation.

Engine Specifications:

  • 24 volt starting motor
  • Heavy-duty spark arrestor / silencer
  • Pusher type fan
  • Full-flow lubricating oil filter
  • Dry-type air cleaner
  • (2) 12-volt batteries
  • Pusher-type fan
  • Low coolant shutdown

Generator Specifications:

  • 400 Hz 115/200 volts nominal
  • +/- 15% adjustable
  • 3 phases
  • 4 wire wye-connected
  • Grounded neutral
  • Revolving field
  • Brushless
  • Self-cooling
  • Single bearing
  • Brushless rotating rectifier assembly
  • Direct engine connection

Electrical Characteristics:

  • Meets MIL-STD-704F
  • Voltage regulation: +/- 1% over full load range
  • Voltage transient: +/- 13.8% no load to full load
  • Voltage transient recovery time: +/- 1% of nominal voltage within 100 milliseconds
  • Voltage modulation: 0.5% at steady state
  • Phase balance: <1% at balanced 3 phase load. <4% at 1/3 load on 1 phase and no-load on 2 phases
  • Harmonic content: THD <2%. Any 1 phase harmonic <1.5% at 0.8 PF linear load
  • Crest factor: 1.414 +/- 0.07
  • Frequency regulation: +/-0.1% no-load to full-load and overload
  • Frequency transient: +/- 2.5% no-load to full load
  • Frequency transient recovery time: +/- 0.5% of nominal frequency within 1.5 seconds
  • Overload rating: 125% for 5 minutes
  • Line drop compensation: Increases up to 10 VAC
  • L-N to compensate for aircraft cable voltage drop

Chassis Characteristics:

  • Easy access to all components
  • Side mounted cable trays with integral rollers
  • Fuel tank – 46 gallons for over 8 hrs of run time
  • 5th wheel steering with no-drop towbar brake
  • Forklift pockets and tie down rings
  • Cable plug holders