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G3520 2500kW Gas Generator Set

Gas Standby Rating

2500 ekW @ 0.8pf

Fuel Type

Natural Gas, Hydrogen Blend (up to 5%)

Emissions/Fuel Strategy

U.S. EPA Stationary Non-Emergency Certified


Caterpillar is leading the power generation marketplace with Fast Response generator sets engineered to deliver unmatched performance, reliability, and cost-effectiveness.



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  • Generator Set Specifications
    Spec Value
    Gas Standby Rating 2500 ekW @ 0.8pf
    Fuel Type Natural Gas, Hydrogen Blend (up to 5%)
    Emissions/Fuel Strategy U.S. EPA Stationary Non-Emergency Certified
    RPM 1800 rpm
    Frequency 60 Hz
    Compression Ratio 11.5
  • Engine Specifications
    Spec Value
    Engine Model G3520
    Displacement 5956 in³
    Aspiration TA
    Bore 6.7 in
    Stroke 8.5 in
  • Generator Set Dimensions
    Spec Value
    Length 336 in
    Width 94 in
    Height 128 in
    Weight 48500 lb

Standard Equipment

Air Inlet

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

Control Panel

  • Cat ECS 100


  • Jacket water and SCAC engine-driven pumps
  • Jacket water and SCAC thermostats


  • Cat-flanged face outlet on turbocharger
  • Individual exhaust port and turbocharger outlet wired to integrated temperature sensing module (ITSM) with GCEM providing alarms and shutdowns
  • Dry exhaust manifolds, insulated and shielded

Fuel System

  • Gas pressure regulator
  • Engine-installed electronic control valve
  • 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
  • 24V DC energized-to-run (ETR) gas shutoff valve
  • Throttle plate, 24V DC actuator, controlled by GECM


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


  • SR5
  • Permanent Magnet Excitiation
  • NEMA Class H insulation
  • Winding temperature detectors
  • Integrated voltage regulator (IVR)
  • Anti-condensation space heater


  • Battery with cables and rack (shipped loose)
  • 24V starting motors
  • Electric Starter
  • Jacket water heater

Governing System

  • ADEM A4

Ignition System

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

Optional Equipment

Air Inlet

  • Air cleaner with precleaner

Control Panel

  • Local alarm module
  • EMCP 4.4
  • Remote annunciator
  • Remote PC monitoring
  • Engine failure relay
  • Local PC monitoring

Circuit Breakers

  • 2000A, 2500A, 3000A 3 Pole, UL-100% Rated Masterpact Circuit Breakers
  • 100% rated, 3-pole (UL/CSA/IEC) 5th Digit Rating
  • 3-pole (IEC 947-2 rated)
  • Frame mounting
  • 1600A, 2000A 3 Pole, UL-100% Rated R-Frame Circuit Breakers
  • S LSI, G LSIG, P LSIG-P, 4th Digit Type


  • Coolant level drain line with valves, fan with guard
  • Package mounted radiator


  • 305 mm (12 in.) muffler
  • 305 mm (12in.) elbow
  • 18, 25 dBA Attenuation
  • 305 mm (12 in.) flange
  • 305mm (12 in) spark arresting muffler

Fuel System

  • 3, 0-100 kPag, 4-20mA gas train pressure sensors


  • Digital diagnostic tool


  • Low voltage extension box
  • Bearing temperature detectors
  • European bus bars
  • Cable access box
  • Generator air filter


  • 45A, 24V charging alternator (requires engine driven pumps)
  • 20A, 24VDC battery charger

Grid Code Compliance

  • 60 Hz: USA