140CU20 – Hobart Ground Power Unit – 400Hz AC, 140kVA

140CU20 Hobart Ground Power Unit – Designed For Durability:

140CU20 Hobart Ground Power Unit

Low profile, combined with standard 5th wheel (turntable) steering, provides superior visibility and maneuverability in congested ramp areas, while the durable bumper system protects the unit from damage caused by other GSE.

Power For Peak Performance:

The Hobart Cummins diesel powered GPU features the “QSB” series electronic diesel engine, combined with a Hobart designed and manufactured generator, to maximize GPU performance while maintaining the traditional Hobart reputation for reliability.

CE & Tier 3 Emission Certified:

Hobart teamed with Cummins to specify the most technically advanced engine designed to meet both current and future Emission standards. International labeling is an added feature of this Hobart GPU.

140CU20 Performance Features:

  • Fully Emission Certified Engine (Tier 3)
  • Noise “Isonorized” design which includes a noise reduction kit
  • Large corrosive free fuel tank (125 gallon) and low fuel warning shutdown are standard
  • Delayed stop (for turbo protection) and emergency shutdown are standard
  • Hobart-designed and manufactured generator offers long life and reliability
  • Numbered, color-coded wiring remains traceable for the life of the unit
  • 5th wheel (turntable) steering features maintenance-free nylon bushings
  • Choice of drum type braking systems: tow bar activated or hand brake activated
  • Superior regulation via the engine’s electronic control module
  • Lift-off doors and pop-out panels provide easy access to engine, generator and control compartments
  • Lost Neutral Detection standard

140CU20P5 Specifications

140CU20 Engine

  • Cummins QSB6.7 diesel engine operating at 2000 RPM (276 hp)
  • Turbocharged 4-stroke, inline 6 cylinder and fuel pump
  • Full application approval by Cummins Engine Co., Inc.
  • 12 VDC battery system
  • Low oil pressure shutdown
  • High coolant temperature shutdown
  • Intake air restriction indication
  • Electronic governor system (via the engine’s ECM)
  • Semi-automatic engine pre-heater for cold weather starts

140CU20 Environmental

  • Relative humidity 10-95%
  • Operating Temperature: -25° F to +125° F (-31° C to + 52° C)
  • Relative humidity 0-100% non-condensing
  • No altitude derating required up to 10,000 feet, when running in normal operating range

140CU20 Performance

  • Rating: 140kVA, 3 phase, 4 wire, 115/200 VAC, continuous
  • Meets or exceeds MIL-STD-704F Electrical Power Quality Requirements

140CU20 Overload

  • 125% rated load for 5 minutes, 150% for 30 seconds
  • Individual outputs: 324 amps, 5 minutes


  • Transient voltage recovery time: to within ± 1% in 100 milliseconds (no load to rated load)
  • Within +/- 20% deviation upon application/removal of 100% load rating
  • Modulation: does not exceed 0.5% of steady state voltage
  • Phase voltage displacement with balanced load: 120+/-1.5
  • Phase voltage balance (with unbalanced load) does not exceed 4% with 1/3 rated current on any single phase with other two phases disconnected
  • Crest factor: 1.414 +/- 0.07
  • Individual Harmonic Distortion: < 2% of the fundamental (RMS) voltage
  • Total Harmonic Distortion: <3% of the fundamental (RMS) voltage

140CU20 Regulation

  • Voltage Regulation: ±1% no load to full load
  • Voltage adjust: ±15 volts
  • Three phase average sensing
  • Line Drop Compensation: Automatic up to 5%

140CU20 Protection

  • Meets MIL-STD-704F
  • Over-voltage: instantaneous disconnect of load at 180 volts L-N, with inverse time delay down to 126 volts in 2 seconds
  • Under-voltage: disconnects output below 100 volts L-N in 7 seconds
  • Over-frequency: disconnects output above 420Hz in 5 seconds
  • Under-frequency: disconnects output below 380Hz in 7 seconds

140CU20 Frequency

  • Regulation: +/- 2Hz steady rate
  • Transient recovery: to within +/- 5Hz in
  • Modulation: <0.25% (1Hz)

140CU20 Protective Finish

  • Anti-corrosive Polyester powder provides excellent weather resistance, flexibility and adhesion, plus a strong resistance to chemical agents such as glycol and skydrol
  • Standard colors are high gloss white over black frame and chassis
  • Custom colors require a paint chip or swatch for accurate color match

140CU20 Trailer

  • Tire Size: 20.5 x 8.00 – 10
  • Ground clearance: 9” (.23m)
  • Brakes: Tow bar activated, drum type

140CU20 Displays / Instrumentation

    Engine Operation
    • Meters: coolant temperature, battery voltmeter, hour meter, oil pressure, fuel level
    • Indicator Lights: engine circuit on, engine stop delay action, panel lights, fault summary (test/reset button)
    • Fault Code Display: air cleaner restriction, high coolant temperature, low oil pressure, low fuel warning, etc.
    • Buttons: engine start, engine stop, panel lights
    Generator Output
    • Meters: frequency, ammeter, voltmeter
    • Indicator Lights: contactors on, fault summary (test/reset button), EF interlock mode
    • Fault Code Display: over-frequency, under-frequency, overload, over-voltage, under-voltage, etc.
    • Buttons: meter select, output contactors control, test/reset

140CU20 Available Options

  • Block heater kit, (120V/60Hz or 240V/50Hz)
  • Internal 28.5 VDC Transformer-Rectifier (600 A continuous, 2000 A peak)
  • Automatic towbar height stop
  • Pintle or pin hitch
  • Spot light
  • Stainless Steel Fuel Tank
  • Alternative mounting configuration: stationary, fixed, or truck mounted
  • Special paint scheme
  • Hand activated brakes
  • Battery blanket (120V)
  • Indicator beacons (low fuel, operating)
  • Low fuel warning/shutdown
  • Clearance Lights
  • CE Marking
140CU20 Specifications
Type kVA KW Outputs Engine Model HP Size ( L x W x H ) Unit Weight
Trailer 140 112 2 QSB6.7 240 156.6 L x 70.13 H x 77 W in
3975 x 1934 x 1956 mm
7000 lbs (3175 kg)
Fixed 6500 lbs (2948 kg)