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G3512 750kW Gas Generator Set

Cat Engine

· Robust high speed block design provides prolonged life and lower owning and operating costs
· Designed for maximum performance on low pressure gaseous fuel supply
· Simple open chamber combustion system for reliability and fuel flexibility


· Matched to the performance and output characteristics of engine
· Industry-leading mechanical and electrical design
· Industry-leading motor starting capabilities

Cat EMCP Control Panel

The EMCP controller features the reliability and durability you have come to expect from your Cat equipment. EMCP 4 is a scalable control platform designed to ensure reliable generator set operation, providing extensive information about power output and engine operation. EMCP 4 systems can be further customized to meet your needs through programming and expansion modules.

Design Criteria

  • Per NFPA 110 Level 1 Type 10 the generator set is able to start and be ready to accept load within 10 seconds
  • The generator set is capable of accepting 100% rated load in a single step
  • The generator set meets Class G2 ISO 8528-5 transient response for a 30% load step
  • Cooling system designed to operate in 45˚C/113˚F ambient temperatures with an air flow restriction of 0.5 in. water without derate


  • EPA
     - S.I. Stationary Emergency
  • UL 2200 Listed
  • CSA Certified
  • Certain restrictions may apply
  • Consult with your Cat dealer

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 Cat® S•O•S℠ program cost effectively detects internal engine component condition, even the presence of unwanted fluids and combustion by-products

Proven system

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


For all your gas power requirements, visit www.catgaspower.com

Gas Generator Sets Specification
Gas Standby Rating 750 ekW
Fuel Type Natural Gas
Frequency 60 Hz
Speed 1800 rpm
Engine Specifications
Compression Ratio 9.7 (9.7 )
Gas Generator Sets Specification
Displacement 52 l (3173 inu00b3)
Engine Specifications
Engine Model G3512
Displacement 52 l (3173 inu00b3)
Aspiration TA
Bore 170 mm (6.7 in)
Stroke 190 mm (7.5 in)
Generator Set Dimensions
Length 5224 mm (205.7 in)
Width 2286 mm (90 in)
Height 2525 mm (99.4 in)
Weight 12500 kg (27500 lb)
Generator Set Configurations
Emissions/Fuel Strategy U.S. EPA Stationary Emergency Certified

Standard Equipment

  • Air Inlet
    • Dual air cleaners, 1 per side, with service indicator
  • Cooling
    • Engine driven pumps for jacket water and separate circuit aftercooler
  • Exhaust
    • Inboard Exhaust manifolds
  • Fuel
    • Gas Train: NFPA37 and CSA B149.3
    • 0.5 to 5 psi engine fuel inlet pressure
    • Pipeline Natural Gas: 800-1000 BTU/scf and 70-100 Methane Number
    • NOx sensor based air-fuel-ratio control
    • Fuel Safeties, “Energize to Run” (ETR) Gas Shutoff Valve (GSOV)
  • Generator
    • Matched to the performance and output characteristics of Cat engines
    • SR5 Generators include:
  • Lubrication
    • Gear type lube oil pump
    • Cartridge style oil filter
    • Integral lube oil cooler
  • Mounting
    • Steel base- engine/generator/radiator mounting
    • Anti-vibration mounts available for isolation efficiencies above 95%
  • Starting/Charging
    • 24V DC starting motors
    • Batteries with rack and cables
    • Battery disconnect switch
    • Jacket Water Coolant Heaters: 208/240/480V, 60Hz, 9/12 kw, UL Listed
  • Governing
    • ADEM A4 speed governor with 4 to 20ma (0V to 5V) speed input
  • Control Panel
    • EMCP 4.3 Genset Controller
  • Ignition
    • Electronic Ignition System (controlled by ADEM A4)
    • Individual cylinder Detonation Sensitive Timing
  • General
    • Paint — Caterpillar Yellow except rails & radiators
    • Crankshaft vibration damper
    • Lifting eyes
    • Operation and Maintenance Manuals; Parts Book

Optional Equipment

  • Exhaust
    • Exhaust Mufflers
    • Elbows, flanges, and flexible fittings
  • Generator
    • Voltages Available: 440/480/600/2400/4160
    • Random and Form wound available
    • Space Heater – 240V
    • Stator and bearing temperature monitoring and protection
  • Power Terminations
    • LH/RH/Rear Busbar connections
    • Top/Bottom Cable Entry
    • Circuit Breakers
  • Lube System
    • Lubricating oil
    • Oil Level Regulator
    • Sump Pump
  • Control System
    • Generator temperature monitoring & protection
    • Load share module
    • Annunciators
  • Starting/Charging
    • Starters: Either 2 or 3 electric starters available
    • Battery Chargers: 20, 35, or 50 AMP
    • Charging alternator, 45 AMP
    • Batteries (w/ rack and cables)
    • Electric Prelube Pump (AC)
  • Mounting
    • Low efficiency (90%), rubber puck isolators
    • High efficiency (95%), spring isolators
    • Seismic isolators, rated to 1.5G
  • Cooling System
    • Package Mounted Radiator, sized for 45C/113F ambient to 300m/660ft
    • Low coolant level sensors (w/ radiator)
    • Jacket Water out: LH/RH, flanged or hose
  • General
    • The following options are based on regional and product configuration:

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