The TLD GPU-409 is a compact mobile ground power unit designed to deliver full-size 400 Hz performance while providing easy handling and maneuverability around aircraft.

Its brushless, high-efficiency generator operates at an optimized 1,846 RPM to improve fuel efficiency, reduce sound levels and maintain rapid transient response with precise frequency regulation.

Built on a rugged galvanized steel chassis, the GPU-409 combines corrosion-resistant body panels, straightforward maintenance access and a durable towable design for dependable airport, airline and FBO operations.

General:
• Compact mobile 400 Hz ground power unit
• 115/200 V AC, three-phase, four-wire wye-connected output
• Brushless, high-efficiency generator
• Optimized 1,846 RPM operating speed
• Designed for improved fuel efficiency and reduced sound levels
• Rapid transient response and precise frequency regulation
• Suitable for independent aircraft ground-power applications
• Meets MIL-STD-704F and ISO 6858 requirements
• Compliant with applicable CE standards
• Available in trailer-mounted or skid-mounted configurations

Construction and Mobility:
• Heavy-duty galvanized steel chassis
• Powder-coated aluminum and fiberglass body panels
• Rubber torsion axle
• Tight-radius fifth-wheel steering
• Towbar-actuated mechanical parking brake
• Safe no-drop towbar design
• Forklift pockets and tie-down rings
• Side-mounted cable-storage bin with integrated rollers
• Cable plug holders and hooks for securing the aircraft connector
• Fuel capacity for approximately eight hours of operation

Controls and Protection:
• TLD GCM2 electronic generator control module
• Intuitive operator interface
• Integrated data-logging system
• Full instrumentation and fault annunciation
• Engine and generator protection systems
• Low-coolant automatic shutdown
• Fuel filter and water separator
• Externally mounted battery-disconnect switch
• Easy access to major components and maintenance points

Optional Equipment:
• Second 400 Hz AC output
• 28.5 VDC transformer rectifier
• Custom-length output cables with multiple connector options
• Cold-weather package with 120 V or 240 V engine block heater
• Operating and low-fuel warning beacons
• Link remote-monitoring system
• Anti-drive-away kit
• E-PIN kit for military aircraft
• Fire extinguisher
• Protective rub rails on all sides