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G3512 750kW Gas Generator Set

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  • Displacement 3173 in3
  • Gas Standby Rating 750kW
  • Emissions/Fuel Strategy U.S. EPA Stationary Emergency Certified
  • Compression Ratio 9.7

Call 440-838-7348 for rate information

Gas Generator Sets Specification

  • Displacement
    3173 in3
  • Gas Standby Rating
  • Compression Ratio

Generator Set Configurations

  • Emissions/Fuel Strategy
    U.S. EPA Stationary Emergency Certified

Generator Set Dimension

  • Weight
    27500 lbs

Engine Specification

  • Engine Model

Generator Set Specifications

  • Fuel Type
    Natural Gas
  • Frequency
    60 Hz
  • RPM
    1800 rpm
  • Gas Standby Rating
    750 ekW @ 0.8pf
  • Displacement
    3173 in³
  • Emissions/Fuel Strategy
    U.S. EPA Certified for Non-Emergency Stationary Genset

Engine Specifications

  • Bore
    6.7 in
  • Stroke
    7.5 in
  • Displacement
    3173 in³
  • Aspiration
  • Governor Type
    ADEM A4
  • Engine Model

Generator Set Dimensions

  • Length
    205.7 in
  • Width
    90 in
  • Height
    99.4 in
  • Weight
    27500 lb

Generator Sets Specifications

  • Compression Ratio

Cat G3512 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

SR5 Generator

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

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

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


  • EPA Certified for use in Emergency and Non-Emergency applications
  • Additional a NOx selectable genset is available to 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

World Wide 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
    • Dual air cleaners, 1 per side, with service indicator
    • Two-element single-stage air cleaner with enclosure and service indicator
  • Control Panel
    • EMCP 4.3
  • Cooling
    • Engine driven pumps for jacket water and separate circuit aftercooler
    • Jacket water and SCAC engine-driven pumps
    • Jacket water and SCAC thermostats
    • LH or RG connections when radiator is not selected
    • Package mounted radiator
  • Fuel
    • NOx sensor based air-fuel-ratio control
    • 0.5 to 5 psi engine fuel inlet pressure
    • Pipeline Natural Gas: 800-1000 BTU/scf and 70-100 Methane Number
    • Gas Train: NFPA37 and CSA B149.3
  • Exhaust
    • Individual exhaust port and turbocharger outlet wired to integrated temperature sensing module (ITSM) with GCEM providing alarms and shutdowns
    • Dry exhaust manifolds, insulated and shielded
    • Cat-flanged face outlet on turbocharger
  • Fuel System
    • Fuel system is sized for 31.5 to 47.2 MJ/NM3 dry pipeline natural gas with pressure of 10.2 to 34.5KPa to the engine fuel control valve
    • Throttle plate, 24V DC actuator, controlled by GECM
    • Engine-installed electronic control valve
    • Gas pressure regulator
    • 24V DC energized-to-run (ETR) gas shutoff valve
  • General
    • Crankshaft vibration damper and guard
    • Operation and maintenance manuals
    • Parts book
    • Paint- Caterpillar Yellow except rails and radiators gloss black 
    • RH Service
  • Lubrication
    • Gear type lube oil pump
    • Cartridge style oil filter
  • Generator
    • Anti-condensation space heater
    • Winding temperature detectors
    • NEMA Class H insulation
    • SR5
    • Permanent Magnet Excitiation
    • Caterpillar's Digital Voltage Regulator (CDVR) including reactive droop capability, 3-phase voltage sensing, KVAR/PF modes, RFI suppression, and a min/max exciter
  • Governing System
    • ADEM A4
  • Ignition System
    • Individual Cylinder Detonation Sensitive Timing (DST) 
    • Electronic Ignition System (controlled by ADEM A4) 
  • Governing
    • ADEM A4 speed governor with 4 to 20ma (0V to 5V) speed input
  • Starting/charging
    • 24V DC starting motors
    • Batteries with rack and cables
    • Electric Starter

Optional Equipment:

  • Air Inlet
    • Mounting brackets and piping
    • Air cleaner with precleaner
  • Circuit Breakers
    • S LSI, G LSIG, P LSIG-P, 4th Digit Type
    • Right, left, rear mounted
    • 1200A, 3 Pole, UL-100% Rated P-Frame Circuit Breakers
    • 1600A, 2000A 3 Pole, UL-100% Rated R-Frame Circuit Breakers
    • 2000A 3 Pole, UL-100% Rated Masterpact Circuit Breakers
    • 100% rated, 3-pole (UL/CSA/IEC) 5th Digit Rating
    • 3-pole (IEC 947-2 rated)
    • Frame mounting
  • Control Panel
    • Remote annunciator
    • Local alarm module
    • Local PC monitoring
    • Engine failure relay
    • Remote PC monitoring
  • Cooling
    • Coolant level drain line with valves, fan with guard
    • Remote radiator for JW and SCAC circuits, level switch included but not wired
    • Inlet/Outlet connections
  • Exhaust
    • 305 mm (12in.) elbow
    • 18, 25 dBA Attenuation
    • Flexible fittings
    • 305 mm (12 in.) muffler
    • 305mm (12 in) spark arresting muffler
    • 305 mm (12 in.) flange
  • Fuel System
    • 3, 0-100 kPag, 4-20mA gas train pressure sensors
  • General
    • Special paint order
    • US AID emblem
    • Tool set
    • Digital diagnostic tool
  • Generator
    • Cable access box
    • Generator air filter
    • European bus bars
    • Low voltage extension box
    • Bearing temperature detectors
  • Starting/charging
    • 20A, 24VDC battery charger
    • Battery with cables and rack (shipped ;ppse_
    • Jacket water heater
    • 45A, 24V charging alternator (requires engine driven pumps)
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