XG400 – Natural Gas


Fuel/Emissions Strategy

U.S. EPA Tier 2 for Large Non-road Spark-ignition Engines

CAT® CG137-12 TA Gas Engine


  • Robust high speed diesel block design provides prolonged life and lower owning and operating costs.

  • Engine ratings developed to accept low-quality gas down to Cat MN 30

CAT EMCP 4.4 Control Panel

Fully featured power metering, protective relaying, and engine/generator control and monitoring.

Cat Generator


  • Cat SR4B 593 frame generator designed to match performance and output characteristics of the Cat gas engine.

  • Segregated AC/DC, low voltage accessory box provides single point access to accessory connections

CAT Integrated Voltage Regulator (IVR)

Three-phase generator voltage sensing with adjustable volts-per-hertz regulation.



  • 30′ ISO high cube container.

  • Sound attenuated air intake louvers

  • Three lockable personnel doors with panic release.

  • Meets 75 dB(A) at 7 meters sound performance per SAE J1074

Distribution Panel

600/346V, 480/277V, 240/139V, 208/120V, 3-phase.

Side Customer Access

Side buss bar access door, external access load connection buss bars.

Internal Lighting

Three internal DC lights with one timer installed at the container door.

Rental Ready Features


  • Anti-condensation heater 110-120 VAC.

  • Coolant heater 110-120 VAC.

  • UL Listed battery charger.

Cooling System

Provides 40 ºC (122 ºF) ambient capability with 0.5 g/bhp-hr NOx per NSPS 2010 at 100% continuous rating.

Generator Set
Rating 400 ekW (500 kVA) Continuous
Frequency 60Hz
Voltage 208 - 600 V
Engine CAT CG137-12 TA Gas Engine
Fuel Natural Gas
Width - With Trailer 2438 mm (96 in)
Height - With Trailer 4115 mm (162 in)
Length - With Trailer 360 in (9144 ml)
Weight - With Trailer, Lube, Oil and Coolant 17917 kg (39500 lb)

Standard Equipment

  • external access load connection buss bars
    • Side buss bar access door
  • V12
    • CG137-12 TA
  • canister-type air cleaner with service indicator
    • Single element
  • three-phase
    • SR4B 593 frame
  • 24VDC
    • Single electric starting motor
  • integral oil cooler
    • Pump
  • 20 Amp battery charger
    • UL/CSA listed 120V
  • Control Panel
    • EMCP 4.4 genset mounted controller
  • Cooling System
    • Package-mounted radiator with vertical air discharge provides 40ºC ambient capability
  • Enclosure
      • Sound attenuated 75 dB(A) @ 7 m.
      • 30′ ISO high cube container.
  • Exhaust System
      • Catalyst w/spark arresting muffler
      • Crankcase fumes disposal system
  • Fuel System
      • Gas pressure regulator.
      • Low pressure fuel system.
      • Methane detection.
  • Mounting System
    • Generator set soft mounted to container floor
  • General
    • Factory testing of standard generator set

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