DG400-2 (Three phase)

  • Overview
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  • Four-stroke-cycle gas engine combines consistent performance and excellent fuel economy with minimum weight


  • Matched to the performance and output characteristics of Cat engines
  • Industry leading mechanical and electrical design
  • Industry leading motor starting capabilities
  • High Efficiency

EMCP Control Panel

  • User-friendly interface and navigation
  • Scalable system to meet a wide range of installation requirement
  • Expansion modules and site-specific programming for specific customer requirements

Design Criteria

  • The generator set facilitates compliance with NFPA 110 and meets ISO 8528-5 requirements for transient response
  • Cooling system designed to operate in 50˚C/122˚F ambient temperatures with an air flow restriction of 0.5 in. water

UL 2200 / CSA
 - Optional

  • UL 2200 Listed packages
  • CSA Certified
  • Certain restrictions may apply
  • Consult with your Cat® Dealer

Worldwide Product Support

  • Cat dealers have over 1,800 dealer branch stores operating in 200 countries
  • Your local Cat dealer provides extensive post-sale support, including maintenance and repair agreements

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

Standard Equipment

  • Cooling
    • Closed coolant recovery system
    • Factory-installed radiator
    • 50/50 Ethylene glycol antifreeze
  • Fuel
    • Low fuel pressure switch
    • Primary and secondary fuel shut-off
    • Fuel pressure test po
  • Generator
    • Class H insulation material
    • Full load capacity alternator
    • Permanent magnet excitation
  • Controls
    • EMCP 4.2 Series generator set controller
  • Mounting
    • 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

Optional Equipment

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

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