Gas Generator G3516H

Cat G3516H 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 and hydrogen mixtures
  • 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

SR5 Generator

  • Designed to match performance and output characteristics of Caterpillar gas engines
  • Industry leading mechanical and electrical design
  • High efficiency

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


  • Meets most worldwide emissions requirements down to 0.5 g/bhp-hr NOx level without aftertreatment

Proven System

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

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 have over 1,800 dealer branch stores operating in 200 countries
  • Your local Cat dealer provides extensive post-sale support, including maintenance and repair agreements

Generator Set Specifications
Continuous Rating 2027 / 2007 ekW @ 1.0pf
Fuel Type Natural Gas, Hydrogen Blend (up to 25%)
Maximum Electrical Efficiency 45.30%
Frequency 50 / 60 Hz
RPM 1500 rpm
Engine Specifications
Engine Model G3516H
Displacement 78 l (4765 inu00b3)
Aspiration TA
Bore 170 mm (6.7 in)
Stroke 215 mm (8.5 in)
Compression Ratio 12.1
Generator Set Dimensions
Length 7395 mm (291 in)
Width 2139 mm (84 in)
Height 2402 mm (95 in)
Dry Weight - Genset 18315 kg (40384 lb)
Engine Specifications
Fuel System Natural Gas

Standard Equipment

  • Control Panels
    • EMCP4.3
  • Air Inlet
    • Package Mounted Air Cleaner with service indicator
    • Two-element single-stage air cleaner with enclosure and service indicator
  • Cooling
    • Jacket water and SCAC driven thermostats
    • ANSI Class 150/DN custom flange connections for JW inlet and outlet
    • Engine driven water pumps for jacket water and after cooler
    • 2nd stage SCAC-Cat Flange
  • Exhaust
    • Center section cooled turbocharger with Cat flanged outlet
    • 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
    • Cat-flanged face outlet on turbocharger
  • Fuel System
    • Throttle plate, 24V DC actuator, controlled by GECM
    • Electronic fuel metering 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
  • Ignition System
    • Electronic Ignition System (controlled by ADEM A4)
    • Individual Cylinder Detonation Sensitive Timing (DST)
  • Generator
    • Permanent Magnet Excitiation
    • Anti-condensation space heater
    • Winding temperature detectors
    • SR5
    • Reactive Droop
    • Caterpillar’s Digital Voltage Regulator (CDVR) with 3-phase sensing and KVAR/PF control
  • General
    • Crankshaft vibration damper and guard
    • Paint – Caterpillar Yellow except rails and radiators gloss black
    • RH Service
    • Parts book
    • Operation and maintenance manuals
  • Governing System
    • ADEM A4 4-20mA (0-5V) Speed Input
  • Starting/Charging
    • 24V starting motors

Optional Equipment

  • Air Inlet
    • Mounting brackets and piping
    • Air cleaner with precleaner
    • Heavy Duty air cleaner with precleaner
  • Circuit Breakers
    • No UV trip or package mounted CB Wiring
    • Frame Mounting
    • MP-Frame 3 Pole Bottom Cable Entry or MP- Frame 6 Pole Bottom Cable Entry
    • 4000A, 3-Pole IEC Rated
    • 2500/3000/3200A or 4000/5000A Neutral Current Transformer Automatic Selection
    • Lower & Upper Covers, Extension Box Roof Cover
    • Busbar Mounting
    • 4000A, 3-Pole UL Rated
  • Control Panels
    • Remote monitoring software
    • Discrete I/O Module, 12 Digital Inputs, 8 ‘Form C’ Relay
    • Remote RS485, 32-light Annunciator
    • Cat Connect: Ehternet, Satellite, Cell Telematics
    • Cross-Current Compensation Current Transformer– 8.7/15 kV Classes
    • RTD Module
    • Local/Remote PC Monitorring
    • 16 Point/32 Light Annunciator with NFPA99-110/CSA282 Configuration
    • Remote Monitoring & Control
    • Synchronizing module
    • Local alarm module
  • Cooling
    • Jacket water coolant heater
    • Inlet/Outlet connections
  • Exhaust
    • Flange
    • Muffler and spark-arresting muffler with ANSI companion flanges
    • Elbow
  • Generator
    • Manual voltage control
    • Generator air filter
    • Low voltage extension box
    • Medium and high voltage generators and attachment
    • Cable access box
    • Bearing temperature detectors
  • Starting/Charging
    • 24V Battery Charger
    • 60A, 24V charging alternator (requires engine driven pumps)
  • General
    • US AID emblem
    • Special paint order
    • Battery diconnect switch
    • Digital diagnostic tool
    • Tool set
    • Battery with cables and rack (shipped loose)
  • 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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