G3520 2500 kW

Gas Generator Sets G3520 with FAST RESPONSE

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Key Specs

Gas Standby Rating
2500 ekW @ 0.8pf
2500 ekW @ 0.8pf
Fuel Type
Natural Gas
Natural Gas
Emissions/Fuel Strategy
U.S. EPA Stationary Non-Emergency Certified
U.S. EPA Stationary Non-Emergency Certified


1750-2500kW Natural Gas Generator

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


Meets UL2200 Certification

Leading edge EPA Certification For Non-Emergency, UL2200, UL1446, and more

Ready in 7.0 Seconds

Complies with industry leading specifications such as NFPA 110 Level 1 Type 10

Ready to accept 100% Block Load

Able to pick up the loads for the entire site in the event of an emergency.

Product Specifications for G3520 with FAST RESPONSE

Gas Standby Rating 2500 ekW @ 0.8pf 2500 ekW @ 0.8pf
Fuel Type Natural Gas Natural Gas
Emissions/Fuel Strategy U.S. EPA Stationary Non-Emergency Certified U.S. EPA Stationary Non-Emergency Certified
RPM 1800 rpm 1800 rpm
Frequency 60 Hz 60 Hz
Compression Ratio 11.5 11.5
Engine Model G3520 G3520
Displacement 5956 in³ 97.6 l
Aspiration TA TA
Bore 6.7 in 170 mm
Stroke 8.5 in 215 mm
Length 336 in 8534 mm
Width 94 in 2386 mm
Height 128 in 3230 mm
Weight 48500 lb 22000 kg

G3520 with FAST RESPONSE Standard Equipment

Air Inlet

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

Control Panel

  • EMCP 4.3


  • 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)

G3520 with FAST RESPONSE 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

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