G3512H 1500kW

Gas Generator Sets CHP1500

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Key Specs

Continuous Rating
1490 ekW @ 1.0pf
1490 ekW @ 1.0pf
Fuel Type
Natural Gas
Natural Gas
Maximum Electrical Efficiency


1061 - 1515 kW Gas Generator

The CHP1500 is an enclosure standardized for natural gas-fueled Cat® G3512H engines rated 1.5 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.


Up to 5% owning & operating cost savings

Higher electrical efficiency paired with extended maintenance intervals increases uptime and reduces costs

Up to 86.1% Package Combined Efficiency

Combined facility soultion simultaneously providing 42.5% electricity efficiency for electrical loads and 43.6% thermal efficiency for heat energy demands.

Overall Length 63 ft Standardized Enclousure

Designed and built for robustness, safety and transportability. Leading to ease of installation and reduce lead time for implementing of CHP projects.

Product Specifications for CHP1500

Continuous Rating 1490 ekW @ 1.0pf 1490 ekW @ 1.0pf
Fuel Type Natural Gas Natural Gas
Maximum Electrical Efficiency 42.50% 42.50%
Frequency 60 Hz 60 Hz
RPM 1500 rpm 1500 rpm
Frequency 60 Hz 60 Hz
Engine Model G3512H G3512H
Displacement 3574 in³ 59 l
Aspiration TA TA
Bore 6.7 in 170 mm
Stroke 8.5 in 215 mm
Fuel System Electronic Fuel Control Valve Electronic Fuel Control Valve
Governor Type ADEM™ A4 ADEM™ A4
Compression Ratio 11.1 11.1
Length 716 in 18200 mm
Width 155 in 3940 mm
Height 467 in 11850 mm
Dry Weight - Genset 34700 lb 15740 kg
Weight 161600 lb 73500 kg

CHP1500 Standard Equipment


  • G3512H, V12, 4-stroke-cycle, gas engine. Operates on 31.5 to 47.2 MJ/NM3 dry pipeline natural gas. Turbocharged Separate Circuit Aftercooled.

Air Inlet

  • Package Mounted Air Cleaner with service indicator

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.


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


  • Fire detection system

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

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

Govrerning System

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

CHP1500 Optional Equipment

Air Inlet

  • Mounting Brackets and Piping
  • Air cleaner with precleaner

Circuit Breaker

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

Control Panel

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


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


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

Fuel System

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


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


  • Special paint order
  • Tool set
  • Digital diagnostic tool
  • US AID Emblem
  • Cold-weather bundle including enclosure heaters and ventilation recirculation
  • Fire suppression system
  • Interior DC lighting system with automatic shutoff timer


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

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