G3412 Gas Generator Set

Cat® G3412 (500kW) Natural Gas Generator models are designed to provide maximum performance on low pressure pipeline natural gas.


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


60 Hz

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
  • Optional Equipment
  • Specs
  • Docs

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
  • Cooling
    • 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
  • Fuel
    • Pipeline Natural Gas: 800-1000 BTU/scf and 70-100 Methane Number
    • Gas Train: NFPA37 and CSA B149.3
  • Exhaust
    • 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
  • General
    • Paint- Caterpillar Yellow with gloss black rails and radiators
    • Operation and maintenance manuals
    • RH Service
    • Parts book
    • Crankshaft vibration damper and guard
  • Lubrication
    • Cartridge style oil filter
    • Gear type lube oil pump
  • Generator
    • 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)
  • Starting/Charging
    • Electric Starter
    • 24V DC starting motors

Optional Equipment

  • Air Inlet
    • Air cleaner with precleaner
  • Circuit Breakers
    • S LSI
    • Frame mounting
    • Right, left, rear mounted
  • Control Panel
    • Local alarm module
    • Local PC monitoring
    • Remote PC monitoring
    • Remote annunciator
  • Cooling
    • Inlet/Outlet connections
    • Coolant level drain line with valves, fan with guard
  • Exhaust
    • Flexible fittings
    • 15, 25 dBA Attenuation
  • General
    • Digital diagnostic tool
    • Tool set
    • US AID emblem
  • Generator
    • Cable access box
    • Bearing temperature detectors
  • Starting/Charging
    • Battery with cables and rack (shipped loose)
    • 10A, 24VDC battery charger
    • Jacket water heater



Long Name:
G3412 Gas Generator Set

Generator Set Specifications

Maximum Standby Rating
500 ekW @0.8pf
Fuel Type
Natural Gas
Emissions/Fuel Strategy
U.S. EPA Certified for Emergency Only Stationary Genset
60 Hz
1800 rpm

Engine Specifications

Engine Model
1649 in³ / 27 l
5.4 in / 137 mm
6 in / 152 mm

Generator Set Dimensions

165 in / 1498 mm
85.25 in / 2189 mm
86 in / 2165 mm
Dry Weight - Genset
14700 lb / 6700 kg