Gas Generator G3512H

From natural gas to biogas, coal mine gases, or hydrogen fuel blends to support combined heat and power (CHP), emergency power, and local grid support applications, Caterpillar has a wide range of reliable gas power solutions.


Cat G3512H 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 and hydrogen mixtures
  • 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

SR5 Generator

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

EMCP 4.3 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


  • Meets most worldwide emissions requirements down to 0.5 g/bhp-hr NOx level without aftertreatment

Proven System

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

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

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
  • Package Mounted Air Cleaner with service indicator
  • Jacket water and SCAC thermostats
  • 2nd Stage CAT Flange
  • ANSI Class 150 JW Connection
  • Engine driven pumps for jacket water and aftercooler cooling
Control Panels
  • Dedicated customer wiring terminals
Control Panel
  • EMCP4.3
  • Dry exhaust manifolds insulated and shielded
  • Center section cooled turbocharger with Cat flanged outlet
  • High efficiency low voltage Cat generator, permanent magnet excitation, digital regulation, IP23 water ingress protection, & form wound construction.
  • Electric Starter
  • Paint - Caterpillar Yellow except rails and radiators gloss black
  • Crankshaft vibration damper and guard

Additional information

Offering Type

Generator Set Specifications - Continuous Rating

1515 ekW / 1505 ekW @1.0pf

Generator Set Specifications - Fuel Type

Natural Gas, Hydrogen Blend (up to 25%)

Generator Set Specifications - Maximum Electrical Efficiency


Generator Set Specifications - Frequency

50 / 60 Hz

Generator Set Specifications - RPM

1500 rpm

Engine Specifications - Engine Model


Engine Specifications - Displacement

59 l ( 3574 in³ )

Engine Specifications - Aspiration


Engine Specifications - Bore

170 mm ( 6.7 in )

Engine Specifications - Stroke

215 mm ( 8.5 in )

Generator Set Dimensions - Length

5656 mm ( 223 in )

Generator Set Dimensions - Width

1921 mm ( 76 in )

Generator Set Dimensions - Height

2308 mm ( 91 in )

Generator Set Dimensions - Dry Weight - Genset

14100 kg ( 31085 lb )

Engine Specifications - Governor Type


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