G3412 Gas Generator Set

Caterpillar is leading the power generation marketplace with Fast Response generator sets engineered to deliver unmatched performance, reliability, and cost-effectiveness.


Cat G3412 Gas Engine

  • Robust high speed block design provides prolonged life and lower owning operationg costs
  • Designed for maximum performance on low pressure pipeline natural gas
  • Simple open chamber combustion system for reliability and fuel flexibility
  • Leading edge technology in ignition system and air/fuel ratio control for lower emission and engine efficiency
  • One electronic control module handles all engine functions: ignition, governing, air/fuel ratio control and engine protection


  • EPA Certified from the factoryfor use in Emergency applications

EMCP4.3 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

Cooling System

  • Designed to operate in standard ambient temperatures up to 43°C (110°F)Contact your Cat Dealer for specific ambient and altitude capabilities

SR5 Generator

  • Designed to match performance and output characteristics of Caterpillar gas engines
  • Industry leading mechanical and electrical design
  • High efficiency

Full Range of Attachments

  • Wide range of bolt-on system expansion attachments
  • Factory designed and tested
  • Flexible packaging options for easy and cost effective installation

Proven System

  • Field proven in a wide range of applications worldwide
  • Fully prototype tested
  • Certified torsional vibration analysis available

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

Standard Equipment

Air Inlet
  • Two-element single-stage air cleaner with enclosure and service indicator
  • Dual air cleaners, 1 per side, with service indicator
Control Panel
  • EMCP 4.3
  • Package mounted radiator
  • LH or RG connections when radiator is not selected
  • Engine driven pumps for jacket water and separate circuit aftercooler
  • Jacket water and SCAC thermostats
  • Pipeline Natural Gas: 800-1000 BTU/scf and 70-100 Methane Number
  • Gas Train: NFPA37 and CSA B149.3
  • Dry exhaust manifolds, insulated and shielded
Fuel System
  • Engine-installed electronic control valve
  • Gas pressure regulator
  • 24V DC energized-to-run (ETR) gas shutoff valve
  • Paint- Caterpillar Yellow with gloss black rails and radiators
  • Operation and maintenance manuals
  • RH Service
  • Parts book
  • Crankshaft vibration damper and guard
  • Cartridge style oil filter
  • Gear type lube oil pump
  • Caterpillar's Digital Voltage Regulator (CDVR) including reactive droop capability, 3-phase voltage sensing, KVAR/PF modes, RFI suppression, and a min/max exciter
  • Anti-condensation space heater
  • Permanent Magnet Excitiation
  • Winding temperature detectors
Governing System
  • ADEM A4
Ignition System
  • Electronic Ignition System (controlled by ADEM A4)
  • Individual Cylinder Detonation Sensitive Timing (DST)
  • Electric Starter
  • 24V DC starting motors

Additional information

Offering Type

Generator Set Specifications - Maximum Standby Rating

500 ekW @0.8pf

Generator Set Specifications - Fuel Type

Natural Gas

Generator Set Specifications - Emissions/Fuel Strategy

U.S. EPA Certified for Emergency Only Stationary Genset

Generator Set Specifications - Frequency

60 Hz

Generator Set Specifications - RPM

1800 rpm

Engine Specifications - Engine Model


Engine Specifications - Displacement

27 l ( 1649 in³ )

Engine Specifications - Aspiration


Engine Specifications - Bore

137 mm ( 5.4 in )

Engine Specifications - Stroke

152 mm ( 6 in )

Generator Set Dimensions - Length

1498 mm ( 165 in )

Generator Set Dimensions - Width

2189 mm ( 85.25 in )

Generator Set Dimensions - Height

2165 mm ( 86 in )

Generator Set Dimensions - Dry Weight - Genset

6700 kg ( 14700 lb )

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