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From natural gas-fueled combined heat and power (CHP) systems and emergency power for facilities, to renewable biogas energy to support the local grid, or electricity generated from coal mine gases, Caterpillar has a wide range of reliable gas power solutions.

Generator Sets Specification

  • Maximum Continuous Rating 1515 ekW / 1505 ekW 1515 ekW / 1505 ekW

Generator Set Specifications

  • Fuel Type Natural Gas Natural Gas

Generator Sets Specifications

  • Maximum Electrical Efficiency 44.90% 44.90%
  • Maximum Standby Rating 1515 ekW / 1505 ekW 1515 ekW / 1505 ekW
  • Frequency 50 / 60 Hz 50 / 60 Hz
  • RPM 1500 rpm 1500 rpm

Generator Set Dimensions

  • Length 223.0 in 5656.0 mm
  • Width 76.0 in 1921.0 mm
  • Height 91.0 in 2308.0 mm
  • Dry Weight - Genset 31085.0 lb 14100.0 kg

Engine Specifications

  • Engine Model G3512H G3512H
  • Displacement 3574.0 in³ 59.0 l
  • Aspiration TA TA
  • Bore 6.7 in 170.0 mm
  • Stroke 8.5 in 215.0 mm
  • Governor Type ADEM A4 ADEM A4


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

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

World Wide Product Support

Cat dealers provide extensive post-sale support including maintenance and repair agreements. Cat dealers have over 1,800 dealer branch stores operating in 200 countries. The Caterpillar S•O•S℠ program cost effectively detects internal engine component condition, even the presence of unwanted fluids and combustion by-products

CAT SR5 Generator

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

CAT EMCP4.3 Control Panel

The EMCP controller features the reliability and durability you have come to expect from your Cat equipment. EMCP4.3 is a scalable control platform designed to ensure reliable generator set operation, providing extensive information about power output and engine operation. EMCP4.3 systems can be further customized to meet your needs through programming and expansion modules.

Proven System

Field proven in a wide range of apllications worldwide, fully protype tested, and certified torsional vibration analysis available

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. 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

CAT electronic control system

Simple user friendly interface and navigation. Digital monitoring, metering and protection setting. Fully-featured power metering and protective relaying. Remote control and monitor capability options

G3512H Standard Equipment

Air Inlet

  • Package Mounted Air Cleaner with service indicator
  • Single-element or two-element single-stage air cleaner with enclosure and service indicator

Circuit Breaker

  • 2500A 3-pole IEC rated circuit breakers, UL100% Rated
  • LSI long-time, LSI-P long-time, LSIG long-time, LSIG-P long-time options
  • Rear mounted

Control Panels

  • EMCP 4.3 Genset Controller


  • 2nd stage CAT flange
  • ANSI class 150 JW connection
  • Engine driven water pumps for jacket water and after cooler
  • Jacket water and SCAC thermostats


  • Center section cooled turbocharger with Cat flanged outlet
  • Dry exhaust manifolds, insulated and shielded

G3512H Optional Equipment

Air Inlet

  • Mounting brackets and piping
  • Air cleaner with precleaner

Circuit Breaker Orientation

  • Frame Mounting
  • No UV trip or package CB wiring
  • 3000/3200/4000A, 3 Pole, UL100% Rated Masterpact circuit breaker (60 Hz only)

Control Panels

  • Language Options
  • Empty Upper Box Right/Left
  • Right/Left/Rear Extension Box
  • Cable shroud location
  • Synchronization module
  • Engine failure relay
  • Cat Connect: ethernet, satellite, cell telematics
  • Local/Remote PC Monitorring
  • Local alarm module
  • 16 point/32 light annunciator with NFPA99-110/CSA282 configuration
  • Discrete I/O module, 12 digital inputs, 8 'Form C' relay
  • Remote annunciator


  • Remote radiator for JW and SCAC circuits, level switch included but not wired
  • JW heater, engine starting aid
  • inlet/outlet connections


  • 305 mm (12 in.) flange
  • Exhaust expander [250mm-329mm (10in-12in)]
  • Elbow
  • Flexible fitting [305mm x 305mm (12in. X 12in.)] w/ 12 bolt-flanges
  • Muffler options
  • 406mm (16in.) sparking-arresting muffler with companion flanges

Fuel System

  • Fuel filter
  • 3, 0-100 kPag, 4-20mA gas train pressure sensors
  • 1/2" NPT gas train conduit connectors
  • Gas knockdown regulators


  • US AID emblem
  • Special paint order
  • Tool set
  • Digital diagnostic tool


  • RTD monitoring
  • Cable access box
  • Bearing temperature detectors
  • Generator air filter
  • Medium and high voltage generators and attachment
  • Manual voltage control

Governing System

  • ADEM A4 4-20mA (0-5V) speed input


  • 24V starting motors
  • Battery with cables and rack (shipped ;ppse_
  • Jacket water heater
  • 45A, 24V charging alternator (requires engine driven pumps)
  • 20A, 24VDC battery charger

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