G3512H 1515kW

Gas Generator Sets G3512H

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Key Specs

Continuous Rating
1515 ekW / 1505 ekW @1.0pf
1515 ekW / 1505 ekW @1.0pf
Fuel Type
Natural Gas, Hydrogen Blend (up to 25%)
Natural Gas, Hydrogen Blend (up to 25%)
Maximum Electrical Efficiency


1061 - 1515 kW Gas Generator

From natural gas to biogas, coal mine gases, or hydrogen fuel blends to support combined heat and power (CHP), emergency power, and local grid support applications, Caterpillar has a wide range of reliable gas power solutions.


Up to 25% hydrogen blended fuel option

Enables operation of up to 25% hydrogen blend (by volume) with pipeline natural gas fuel.

Up to 15% savings on service

Extended maintenance intervals leading to lower service costs

Up to 20% lower lube oil consumption

Leading to lower service costs and extended maintenance intervals

Product Specifications for G3512H

Continuous Rating 1515 ekW / 1505 ekW @1.0pf 1515 ekW / 1505 ekW @1.0pf
Fuel Type Natural Gas, Hydrogen Blend (up to 25%) Natural Gas, Hydrogen Blend (up to 25%)
Maximum Electrical Efficiency 44.90% 44.90%
Frequency 50 / 60 Hz 50 / 60 Hz
RPM 1500 rpm 1500 rpm
Engine Model G3512H G3512H
Displacement 3574 in³ 59 l
Aspiration TA TA
Bore 6.7 in 170 mm
Stroke 8.5 in 215 mm
Governor Type ADEM A4 ADEM A4
Length 223 in 5656 mm
Width 76 in 1921 mm
Height 91 in 2308 mm
Dry Weight - Genset 31085 lb 14100 kg

G3512H Standard Equipment

Air Inlet

  • Package Mounted Air Cleaner with service indicator


  • Jacket water and SCAC thermostats
  • 2nd Stage CAT Flange
  • ANSI Class 150 JW Connection
  • Engine driven pumps for jacket water and aftercooler cooling

Control Panels

  • Dedicated customer wiring terminals

Control Panel

  • EMCP4.3


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


  • High efficiency low voltage Cat generator, permanent magnet excitation, digital regulation, IP23 water ingress protection, & form wound construction.


  • Electric Starter


  • Paint - Caterpillar Yellow except rails and radiators gloss black
  • Crankshaft vibration damper and guard

G3512H Optional Equipment

Air Inlet

  • Mounting brackets and piping
  • Air cleaner with precleaner

Control Panels

  • Remote annunciator

Circuit Breakers

  • Frame mounting circuit breaker orientation
  • 2500A 3-pole IEC rated circuit breakers
  • Rear Mounted Circuit Breaker
  • 3000A/3200A/4000A UL100% Rated Masterpact circuit breaker (60 Hz only)
  • LSI Long-Time, LSI-P Long-Time, LSIG Long-Time, LSIG-P Long-Time,

Control Panel

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


  • Remote radiator for JW and SCAC circuits
  • 220V (50Hz), 240V (60Hz), 480V (60Hz) JW heater


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

Fuel System

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


  • Digital Diagnostic tool
  • US Aid emblem


  • Generator air filter
  • Manual voltage control
  • Cable access box
  • RTD Monitorring
  • Bearing temperature detectors

Governing System

  • ADEM A4 4-20mA (0-5V) speed input


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

Grid Code Compliance

  • 60 Hz: USA
  • 50 Hz: Germany, Great Britain, Belgium, Romania, Italy, Ireland, Poland, Netherlands, Spain, France, and European Standard

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