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Caterpillar is leading the power generation marketplace with Power Solutions engineered to deliver unmatched flexibility, expandability, reliability, and cost-effectiveness.

Gas Generator Sets Specification

Gas Standby Rating 750 ekW 750 ekW Less
Fuel Type Natural Gas Natural Gas Less
Frequency 60 Hz 60 Hz Less
RPM 1800 rpm 1800 rpm Less
Compression Ratio 9.7 9.7 Less
Displacement 3173.0 in³ 52.0 l Less

Engine Specifications

Engine Model G3512 G3512 Less
Displacement 3173.0 in³ 52.0 l Less
Aspiration TA TA Less
Bore 6.7 in 170.0 mm Less
Stroke 7.5 in 190.0 mm Less

Generator Set Dimensions

Length 205.7 in 5224.0 mm Less
Width 90.0 in 2286.0 mm Less
Height 99.4 in 2525.0 mm Less
Weight 27500.0 lb 12500.0 kg Less

Generator Set Configurations

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

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

G3512 750 ekW Standard Equipment

Air Inlet
  • Dual air cleaners, 1 per side, with service indicator

  • Engine driven pumps for jacket water and separate circuit aftercooler

  • Inboard Exhaust manifolds

  • 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)

  • Matched to the performance and output characteristics of Cat engines
  • SR5 Generators include:

  • Gear type lube oil pump
  • Cartridge style oil filter
  • Integral lube oil cooler

  • Steel base- engine/generator/radiator mounting
  • Anti-vibration mounts available for isolation efficiencies above 95%

  • 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

  • ADEM A4 speed governor with 4 to 20ma (0V to 5V) speed input

Control Panel
  • EMCP 4.3 Genset Controller

  • Electronic Ignition System (controlled by ADEM A4)
  • Individual cylinder Detonation Sensitive Timing

  • Paint -- Caterpillar Yellow except rails & radiators
  • Crankshaft vibration damper
  • Lifting eyes
  • Operation and Maintenance Manuals; Parts Book

G3512 750 ekW Optional Equipment

  • Exhaust Mufflers
  • Elbows, flanges, and flexible fittings

  • 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

  • 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)

  • 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

  • The following options are based on regional and product configuration:

Application Center

Explore valuable resources for generator sizing, specification, and training materials. SpecSizer evaluates load types, collects data, and organizes it to help you select the generator set that's best for you. Find product comparisons, technical data, product sizing, and more using our technical information portal (TIP) specifically created for consultants, architects, engineers, and owners.

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EMCP 4 Generator Set Controls

Cat generator sets provide a complete factory-built solution with fully featured standard and advanced controls. Optional accessories enhance the capabilities of the genset package-mounted control system.

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Why Choose Cat® Electric Power?

Caterpillar offers a comprehensive variety of electric power systems, customized to fit your needs. Our specialized systems deliver high power and performance in industries across the globe. With Caterpillar, you get outstanding manufacturing quality, expert support, and the essential tools and applications to complete any project.

Learn More About Electric Power