Cat G3520H Combined Heat and Power (CHP) Solution

The CHP2500 is an enclosure standardized for natural gas-fueled Cat® G3520H engines rated 2.5 MW, with generator rated for 4160V for combined heat and power (CHP) applications. In CHP applications, Cat gas generator sets simultaneously provide electricity for electrical loads and heat energy for a facility’s thermal requirements. Caterpillar will offer customers complete CHP solutions eliminating the need to outsource additional engineering or project management.


Cat® G3520H Humidity Fuel Tolerant Gas Engine

  • Robust high speed block design provides prolonged life and lower owning operationg costs
  • Designed for maximum performance on low pressure pipeline natural gas
  • Simple open chamber combustion system for reliability and fuel flexibility
  • Leading edge technology in ignition system and air/fuel ratio control for lower emission and engine efficiency
  • One electronic control module handles all engine functions: ignition, governing, air/fuel ratio control and engine protection

CHP Ready

Extensive range of rental ready features to meet job requirements and applications.

Single-Source Supplier

Generator set manufactured in ISO 9001:2000 compliant facility.Package factory designed and production tested.

EMCP 4.3 Control Panel

  • User-friendly interface and navigation
  • Scalable system to meet a wide range of installation requirement
  • Expansion modules and site-specific programming for specific customer requirements

Cat Generator

Cat SR5 generator designed to match the performance and output characteristics of the Cat Gas engine.Class H insulation operating at Class F temperature rise for extended life.System 4 insulation protection and anti-condensation space heaters.Integrated Automatic Voltage Regulation (Cat IVR) provides enhanced system monitoring.

Fuel/Emissions Strategy

Meets most worldwide emissions requirements down to 500 mg/Nm3 NOx level without after treatment.Optional: Oxidation catalyst available

Sound Attenuated Container

Meets 75 dB(A) at 7 meters. Weather Proof enclosure, NSPS factory compliant, UL2200 compliant, and CSA/TSSA. Service and Personnel doors. Separate electrical control room. Internal and External emergency stop buttons at convenient locations.

Proven System

  • Field proven in a wide range of applications worldwide
  • Fully prototype tested
  • Certified torsional vibration analysis available

Reduced Environmental Impact

110% spill containment of onboard engine fluids.Positive crankcase fumes ventilation.

Full Range of Attachments

  • Wide range of bolt-on system expansion attachments
  • Factory designed and tested
  • Flexible packaging options for easy and cost effective installation

Worldwide Product Support

Cat® dealers provide extensive post sale support including maintenance and repair agreements. Supported 100% by the Cat dealer with warranty on parts and labor.

Cooling System

Provides 40⁰C (104⁰F) ambient capability with 500 mg/Nm3 NOx (1g/hp-hr) at 100% continuous rating before derate @ 500m. Variable frequency drive fan controls improve partial load fuel consumption. Energy efficient electric drive fan.

Standard Equipment

  • G3520H, V20, 4-stroke-cycle, gas engine.
    Operates on 31.5 to 47.2 MJ/NM3 dry pipeline natural gas.
    Turbocharged Separate Circuit Aftercooled.
Control Panel
  • On Package EMCP 4.3 Control Panel System
    Offers engine and generator monitoringand protection, voltage regulation with Cat IVRimproves transient response performance.
    Controls provide auto paralleling AGC-4 controller, load sharing, VFDcontrol, and primary generator protection for greaterversatility, package utilization and monitoring.
Air Inlet
  • Three-element single-stage air cleaner with enclosure and service indicator
  • Jacket water and SCAC thermostats
  • ANSI/DN customer flange connections for JW inlet and outlet
  • Engine driven water pumps for jacket water and aftercooler
  • Standard cooling provides 40⁰C (104⁰F) ambient capability with 500mg/Nm3 NOx at 100% Continuous rating before derate, @ 500m
Containerized Module
  • NSPS Factory Compilant, UL2200 Compilant and CSA / TSSA
    Sound attenuated 75 dB(A) @ 7 m (23 ft)
    Sound attenuated air intake louvers and lockable personnel doors with panic release
    LH and RH engine service doors integrated intocontainer side walls
    3” ANSI flange customer fuel connection
Generator Controls And Protection
  • Integrated crankcase ventilation system (CCV)and gas fuel train NFPA37 & CSAB149.3
    with external fuel connections package utilization and monitoring.
Modes of Operation
  • Provides for single unit stand-alone operation,island mode paralleling and load sharing withother power modules, and single unit-to-utilitymode paralleling for base load control
Lube Oil Make-Up System
  • Integrated enclousre holding tanks: Oil makeup tank (50 gallon), Waste oil tank
    (300 gal / 2 oil changes), Fresh oil tank (500 gal / 2 oil changes + makeup) and oil level regulator.
    Low level annunciation
  • Fire detection system
Circuit Breaker
  • 5000A 3-Pole IEC Rated Circuit Breakers
  • LSI Long-Time, Short-Time, Instantaneous Annunciator
  • Rear-mounted
  • Externally mounted exhaust system (muffler and heat exchanger)
  • Dry exhaust manifolds, insulated and shielded
  • Center section cooled turbocharger with Cat flanged outlet
  • 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
  • Individual Cylinder Detonation Sensitive Timing (DST)
  • Electronic Ignition System (controlled by ADEM A4)
  • Double bearing SR5 1866 frame, brushless, form wound, 12-lead design, permanent magnet excited, three-phase, with Cat IVR, Class H insulation operating at Class F temperature.
    Stator and Bearing temperature monitoring and anti-condensation space heaters.
  • Caterpillar's Digital Voltage Regulator (CDVR) with 3-phase sensing and KVAR/PF control
  • SR4B
  • Reactive droop
  • Busbar connections
  • RH Service
  • Operation and maintenance manuals
  • SR5
  • Crankshaft Vibration Damper and Guard
  • Parts book
  • Winding temperature detectors
  • Paint- Caterpillar Yellow except rails gloss black
  • Anti-condensation space heater
Govrerning System
  • ADEM A4 4-20mA (0-5VV) Speed Input

Additional information

Offering Type

Generator Set Specifications - Continuous Rating

2480 ekW @ 1.0pf

Generator Set Specifications - Fuel Type

Natural Gas

Generator Set Specifications - Maximum Electrical Efficiency


Generator Set Specifications - Frequency

60 Hz

Generator Set Specifications - RPM


Engine Specifications - Engine Model


Engine Specifications - Displacement

97.5 l ( 5956 in³ )

Engine Specifications - Aspiration


Engine Specifications - Bore

170 mm ( 6.7 in )

Engine Specifications - Stroke

215 mm ( 8.5 in )

Engine Specifications - Fuel System

Electronic Fuel Control Valve

Engine Specifications - Governor Type


Generator Set Dimensions - Length

7668 mm ( 302 in )

Generator Set Dimensions - Width

2173 mm ( 86 in )

Generator Set Dimensions - Height

2473 mm ( 97 in )

Generator Set Dimensions - Dry Weight - Genset

25285 kg ( 54675 lb )

Generator Set Dimensions - Weight

76,200 kg ( 168,000 lb )

Engine Specifications - Compression Ratio


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