Gas Generator Sets G3412 400-512 KW NATURAL GAS GENERATOR

Features At A Glance

CAT G3412 Gas Engine
CAT Electronic Control System
EMCP4.3 Control Panel
Cooling System
SR5 Generator
Full Range of Attachments
Proven System
World Wide Product Support

Product Specifications for G3412

Generator Set Specifications

Engine Specifications

Generator Set Dimensions

G3412 Standard Equipment

Air Inlet

  • Two-element single-stage air cleaner with enclosure and service indicator
  • Dual air cleaners, 1 per side, with service indicator

Control Panel

  • EMCP 4.3


  • Package mounted radiator
  • LH or RG connections when radiator is not selected
  • Engine driven pumps for jacket water and separate circuit aftercooler
  • Jacket water and SCAC thermostats


  • Pipeline Natural Gas: 800-1000 BTU/scf and 70-100 Methane Number
  • Gas Train: NFPA37 and CSA B149.3


  • Dry exhaust manifolds, insulated and shielded

Fuel System

  • Engine-installed electronic control valve
  • Gas pressure regulator
  • 24V DC energized-to-run (ETR) gas shutoff valve


  • Paint- Caterpillar Yellow with gloss black rails and radiators
  • Operation and maintenance manuals
  • RH Service
  • Parts book
  • Crankshaft vibration damper and guard


  • Cartridge style oil filter
  • Gear type lube oil pump


  • Caterpillar's Digital Voltage Regulator (CDVR) including reactive droop capability, 3-phase voltage sensing, KVAR/PF modes, RFI suppression, and a min/max exciter
  • Anti-condensation space heater
  • Permanent Magnet Excitiation
  • Winding temperature detectors

Governing System

  • ADEM A4

Ignition System

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


  • Electric Starter
  • 24V DC starting motors

G3412 Optional Equipment

Air Inlet

  • Air cleaner with precleaner

Circuit Breakers

  • S LSI
  • Frame mounting
  • Right, left, rear mounted

Control Panel

  • Local alarm module
  • Local PC monitoring
  • Remote PC monitoring
  • Remote annunciator


  • Inlet/Outlet connections
  • Coolant level drain line with valves, fan with guard


  • Flexible fittings
  • 15, 25 dBA Attenuation


  • Digital diagnostic tool
  • Tool set
  • US AID emblem


  • Cable access box
  • Bearing temperature detectors


  • Battery with cables and rack (shipped loose)
  • 10A, 24VDC battery charger
  • Jacket water heater

See how G3412 compares against frequently compared products.

Tools And Expert Help At Every Turn

Cat Connect: Get More from Every Asset

Now there's an easier way to track and manage your equipment anytime, anywhere.

Learn More


Calculate what generator size you need by using our commercial and industrial generator sizing calculator, SpecSizer.

Learn More

Extended Service Coverage

Spend less time managing your equipment and more time running your business with options to protect you against unexpected repair costs.

Learn More

Customer Value Agreements

Every piece of Cat equipment is designed and built to provide maximum productivity and operating economy throughout its working life. Your Cat dealer can help you maintain that built-in value through a Customer Value Agreement (CVA).

Learn More

Custom Power Solutions

There are no standard power solutions. Cat experts work with you to design a system to meet your individual power needs.

Learn More

Rent Similar Size

View our full lineup of construction equipment rental products featuring a wide range of portable generator rental options as well as mobile generator sets for rent.

Learn More

Technical Resources

Explore valuable resources for generator sizing, specification, and training materials.

Learn More

Product Brochures and More Are Ready to Download!

Full specifications, product brochures and more. Sign up below for additional information. Or for instant access, you can skip this form.

Check out current offers for the G3412

View More Offers