DG400 GC (3 phase)

Gas Generator Sets DG400 GC (3 phase)

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Key Specs

60 Hz
60 Hz
120/208, 120/240, 277/480, 346/600 VAC
120/208, 120/240, 277/480, 346/600 VAC
Natural Gas Rating
400 ekW
400 ekW


400 kW Natural Gas Generator Set

The Cat® spark-ignited generator product line for stationary applications feature permanent magnet excitation, amortisseur winding, skewed stator, voltage adjustment through the EMCP controller, Class H winding insulation and 2/3 pitch incorporated.


Up to 1414 skVA @30% Voltage Dip

Able to start large connected motors loads during a power outage

Certified EPA Stationary Emergency

Complies with emission standards required for local permits

Alternator Features Class H Insulation

Highest classification ensures alternator durability

Product Specifications for DG400 GC (3 phase)

Frequency 60 Hz 60 Hz
Voltage 120/208, 120/240, 277/480, 346/600 VAC 120/208, 120/240, 277/480, 346/600 VAC
Natural Gas Rating 400 ekW 400 ekW
Emissions/Fuel Strategy U.S. EPA Certified for Non-Emergency Application U.S. EPA Certified for Non-Emergency Application
Displacement 1336.42 in 21.9 l
Fuel Type Natural Gas Natural Gas
RPM 1800 rpm 1800 rpm
Compression Ratio 10.0:1 10.0:1
Engine Model G21.9L spark-ignited G21.9L spark-ignited
Fuel System Carburetor, Down Draft Carburetor, Down Draft
Aspiration Turbocharged - Aftercooled Turbocharged - Aftercooled
Governor Type Electronic Electronic
Bore 5.03 in 21.9 mm
Stroke 5.6 in 152.4 mm
Compression Ratio 10.0:1 10.0:1
Length 154.4 in 3923 mm
Width 71 in 1803 mm
Height 67 in 1702 mm
Weight 8429 lb 3823 kg

DG400 GC (3 phase) Standard Equipment


  • Closed coolant recovery system
  • Factory-installed radiator
  • 50/50 Ethylene glycol antifreeze


  • Low fuel pressure switch
  • Primary and secondary fuel shut-off
  • Fuel pressure test po


  • Class H insulation material
  • Full load capacity alternator
  • Permanent magnet excitation


  • EMCP 4.2 Series generator set controller


  • Vibration isolaton (puck type)

Electric Starting and/or Prelube

  • Engine electrical system
  • Solenoid activated starter motor
  • Battery cables

Electric Power - Package Serial Number Prefix

  • Battery charging alternator

DG400 GC (3 phase) Optional Equipment


  • Anti-condensation heater
  • Shunt trip and auxiliary contact breaker
  • Thermal magnetic or electronic trip MCCBs

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