G3520C Gas Generator

Cat G3520C 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

SR4B or 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

Cooling System


  • 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 2050 ekW
Fuel Type Natural Gas, Biogas, Coal Gas
Maximum Electrical Efficiency 40.10%
Maximum Standby Rating 2050
Frequency 50 / 60 Hz
RPM 1200 / 1500 / 1800 rpm
Engine Specifications
Engine Model G3520C
Displacement 86 l (5270 inu00b3)
Aspiration TA
Bore 170 mm (6.7 in)
Stroke 190 mm (7.5 in)
Generator Set Dimensions
Length 6312 mm (249 in)
Width 1830 mm (79 in)
Height 2340 mm (92 in)
Dry Weight - Genset 17215 kg (37959 lb)
Engine Specifications
Fuel System Natural Gas, Biogas, Coal Gas
Compression Ratio 11.3
Generator Set Dimensions
Weight 17215 kg (37953 lb)

Standard Equipment

  • Air Inlet
    • Two-element single-stage air cleaner with enclosure and service indicator
  • Control Panels
    • EMCP 4.3
  • Cooling
    • ANSI Class 6 in/DN customer flange connections for JW inlet and outlet
    • Engine driven water pumps for jacket water and aftercooler
    • 2nd Stage SCAC-Cat Flange
    • Jacket water and SCAC driven pumps
    • Jacket water and SCAC thermostat and outlet–ANSI 6 in/DN150
  • Exhaust
    • Dry exhaust manifolds, insulated and shielded
    • Cat-flanged face outlet on turbocharger
    • Individual exhaust port and turbocharger outlet wired to Integrated Tmeperature Sensing Module (ITSM) with GECM providing alarms and shutdowns
  • 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
    • Electronic fuel metering valve, ANSI flange
    • Throttle plate, 24V DC actuator, controlled by GECM
    • 24V ETR Gas Shutoff Valve
  • Ignition System
    • Electronic Ignition System (controlled by GECM)
    • Individual Cylinder Detonation Sensitive Timing (DST)
  • Generator
    • 3-phase brushless, salient pole
    • Class F Insulation & temperature rise
    • Reactive droop
    • Permanent Magnet Excitiation
    • Winding temperature detectors
    • Anti-condensation space heater
    • SR4B or SR5
    • Busbar connections
    • Caterpillar’s Digital Voltage Regulator (CDVR) with 3-phase sensing and KVAR/PF control
    • SR4B
  • General
    • Crankshaft Vibration Damper and Guard
    • RH Service
    • Parts Book
    • Operation and maintenance manuals
    • Paint – Caterpillar Yellow except rails and radiators gloss black

Optional Equipment

  • Air Inlet
    • Enclosure Mounting Brackets and Piping
    • Mounting stand
    • Air cleaner with precleaner
  • Contol Panel
    • Custom 8-Light Alarm Module
    • Local NFPA99-110 Alarm Module w/LEDs
    • Remote 24-32V 8/16 Annunciator
    • Synchronizing Module
    • PL1000E/PL1000T Communications Module
    • Engine Failure Relay
  • Control Panels
    • Local alarm module
  • Cooling
    • Inlet/Outlet connections
    • Engine pumps
    • Aftercooler air lines, aftercooler core replacement
    • Jacket water coolant heater
  • Exhaust
    • Mufflers (15/18/25 dBA Attenuation) and spark-arresting muffler with ANSI companion flanges
    • Exhaust expanders
    • Flexible fittings
    • 305/360/406 mm Elbow Kits
  • Fuel System
    • 14-69 kPa (2-10 psi) gas pressure regulator
    • Fuel filter
    • 24V DC Gas shutoff valve
    • 207-276kPa, 30-40 psi gas knockdown regulator
  • Generator
    • Generator Removal
    • Annunciator Modules
    • Medium and high voltage generators and attachment
    • 60 Hz–480/4160 Volt Generator Options
    • Cable access box
    • Generator air filter
    • European Bus Bars
    • Low voltage extension box
    • Bearing temperature detectors
    • 8.7/15 kV Class Current Transformers (CCCT, DCT, CT)
    • 50 Hz–3300/6600 Volt Generator Options
  • Governing System
    • Load share module
  • Starting/Charging
    • Jacket water heater
    • Battery diconnect switch
    • 24V starting motors
    • Battery with cables and rack (shipped loose)
    • 60A, 24V charging alternator (requires engine driven pumps)

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