G3520H 2519kW

Gas Generator Sets G3520H

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Key Specs

Continuous Rating
2519 / 2500 ekW @ 1.0pf
2519 / 2500 ekW @ 1.0pf
Fuel Type
Natural Gas, Hydrogen Blend (up to 25%)
Natural Gas, Hydrogen Blend (up to 25%)
Maximum Electrical Efficiency


1763 - 2519 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 52% 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 G3520H

Continuous Rating 2519 / 2500 ekW @ 1.0pf 2519 / 2500 ekW @ 1.0pf
Fuel Type Natural Gas, Hydrogen Blend (up to 25%) Natural Gas, Hydrogen Blend (up to 25%)
Maximum Electrical Efficiency 45.30% 45.30%
Frequency 50 / 60 Hz 50 / 60 Hz
RPM 1500 1500
Frequency 50/60 Hz 50/60 Hz
Engine Model G3520H G3520H
Displacement 5956 in³ 97.5 l
Aspiration TA TA
Bore 6.7 in 170 mm
Stroke 8.5 in 215 mm
Compression Ratio 12.1 12.1
Length 302 in 7668 mm
Width 86 in 2173 mm
Height 97 in 2473 mm
Dry Weight - Genset 54675 lb 25285 kg

G3520H Standard Equipment

Control Panel

  • EMCP 4.3

Air Inlet

  • Two-element single-stage air cleaner with enclosure and service indicator


  • Engine driven water pumps for jacket water and aftercooler
  • Jacket water and SCAC thermostats
  • ANSI/DN customer flange connections for JW inlet and outlet

Circuit Breaker

  • LSI Long-Time, Short-Time, Instantaneous Annunciator
  • Rear-mounted
  • 5000A 3-Pole IEC Rated Circuit Breakers


  • Center section cooled turbocharger with Cat flanged outlet
  • Dry exhaust manifolds, insulated and shielded
  • Individual exhaust port and turbocharger outlet wired to Integrated Tmeperature Sensing Module (ITSM) with GECM providing alarms and shutdowns

Fuel System

  • Electronic fuel metering valve
  • Throttle plate, 24V DC actuator, controlled by GECM

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

Ignition System

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


  • Caterpillar's Digital Voltage Regulator (CDVR) with 3-phase sensing and KVAR/PF control
  • SR4B
  • Crankshaft Vibration Damper and Guard
  • Busbar connections
  • Paint- Caterpillar Yellow except rails gloss black
  • Winding temperature detectors
  • Operation and maintenance manuals
  • Parts book
  • Anti-condensation space heater
  • RH Service
  • SR5
  • Reactive droop

Govrerning System

  • ADEM A4 4-20mA (0-5VV) Speed Input

G3520H Optional Equipment

Air Inlet

  • Mounting Brackets and Piping
  • Air cleaner with precleaner

Circuit Breaker

  • MP- Frame 6 Pole Bottom Cable Entry
  • 4000/5000A Neutral Current Transformer Automatic Selection
  • No UV trip or package mounted CB Wiring
  • Frame Mounting

Control Panel

  • 16 Point/32 Light Annunciator, Shipped Loose
  • Remote Communications Module (PL1000T, PL1000E)
  • Remote annuciator
  • Local PC Monitorring
  • Discrete I/O Module, 12 Digital Inputs, 8 'Form C' Relay
  • Cat Connect: Ehternet, Satellite, Cell Telematics
  • Engine failure relay
  • Local alarm module
  • Synchronizing module
  • Remote PC Monitorring


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


  • Muffler and spark-arresting muffler with companion flanges
  • Flange
  • Elbow
  • Flexible Fitting
  • Exhaust Expander

Fuel System

  • Gas Knockdown Regulator
  • Fuel filter
  • Gas pressure regulator
  • Gas shutoff valve 24V, ETR (Energized-To-Run)


  • Bearing temperature detectors
  • Cable access box
  • Low voltage extension box
  • Manual voltage control
  • European bus bar
  • Generator air filter
  • Medium and high voltage generators and attachment


  • Digital diagnostic tool
  • Special paint order
  • Tool set
  • US AID Emblem


  • Battery with cables and rack (shipped loose)
  • 24V starting motors
  • Jacket water heater
  • 60A, 24V charging alternator (requires engine driven pumps)

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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