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CAT G3520E 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

SR5 Generator

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

EMCP4.2 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 Electronic Control System

  • Simple user friendly interface and navigation
  • Digital monitoring, metering and protection setting
  • Fully-featured power metering and protective relaying
  • Remote control and monitor capability options

Cooling System

  • Designed to operate in standard ambient temperatures up to 43°C (110°F
  • Contact your Cat Dealer for specific ambient and altitude capabilities

Emissions

  • 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

World Wide 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

Overview

From natural gas-fueled combined heat and power (CHP) systems and emergency power for facilities, to renewable biogas energy to support the local grid, or electricity generated from coal mine gases, Caterpillar has a wide range of reliable gas power solutions.

Generator Set Specification

Units:
Maximum Continuous Rating 2022 2022 Less

Generator Set Specifications

Fuel Type Natural Gas Natural Gas Less
Maximum Electrical Efficiency 41.50% 41.50% Less
Maximum Standby Rating 2022 2022 Less
Frequency 50 50 Less
RPM 1500 1500 Less

Engine Specifications

Engine Model G3520E G3520E Less
Aspiration TA TA Less
Bore 6.7 in 170.0 mm Less
Stroke 7.5 in 190.0 mm Less
Fuel System Natural Gas Natural Gas Less
Compression Ratio 11.9 11.9 Less

Generator Set Dimensions

Length 271.0 in 6893.0 mm Less
Width 79.0 in 2001.0 mm Less
Height 107.0 in 2727.0 mm Less
Dry Weight - Genset 39306.0 lb 17826.0 kg Less

G3520E Standard Equipment

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

Control Panel
  • EMCP 4.3

Control Panels
  • EMCP 4.3

Cooling
  • Standard CAT Flange
  • Right-Hand/Left-Hand Outlet Connections
  • Engine driven water pumps for jacket water and aftercooler
  • ANSI/DN adapter flange connections 

Exhaust
  • Individual  exhaust port and turbocharger outlet wired to Integrated Sensing Module (ISM) with Gas ECM providing alarms and shutdowns
  • Dry exhaust manifolds, insulated and shielded

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
  • Fuel filter
  • Engine installed, fuel metering valve
  • 24V ETR Gas Shutoff Valve
  • Throttle plate, 24V DC actuator, controlled by GECM

Ignition System
  • Individual Cylinder Detonation Sensitive Timing (DST) 
  • Electronic Ignition System (controlled by GECM) 

Generator
  • Busbar connections
  • SR4B
  • Caterpillar's Digital Voltage Regulator (CDVR) with 3-phase sensing and KVAR/PF control
  • Busbar connections
  • SR5
  • Winding temperature detectors
  • Permanent Magnet Excitiation
  • Anti-condensation space heater
  • Caterpillar's Digital Voltage Regulator (CDVR) with 3-phase sensing and KVAR/PF
  • 3-phase brushless, salient pole

General
  • RH Service
  • Crankshaft vibration damper and guard
  • Paint - Caterpillar Yellow except rails and radiators gloss black

G3520E Optional Equipment

Air Inlet
  • Heavy duty air cleaner
  • Regular duty air cleaner
  • Air cleaner with precleaner
  • Mounting stand

Contol Panel
  • Local NFPA99-110 Alarm Module w/LEDs
  • PL1000E/PL1000T Communications Module
  • Remote 24V-32V 8/16 Light Annunciator
  • Custom 8-Light Alarm Module
  • Engine Failure Relay
  • Synchronizing Module

Control Panels
  • Local alarm module

Cooling
  • Jacket water coolant heater
  • Cat Flange, ANS/DIN Adapter Flange
  • Engine Pumps
  • Aftercooler air lines, aftercooler core replacement
  • Inlet/Outlet connections

Exhaust
  • 15/18/25 dBA Muffler Attenuation
  • 305/356mm Flange/Exhaust Expanders, 305/406mm Flange and Exhaust Expander
  • 356-406mm Flange and Exhaust Expander
  • Mufflers (15/18/25 dBA Attenuation) and spark-arresting muffler with ANSI companion flanges
  • 305/360/406 mm Elbow Kits
  • Flexible Fittings
  • 16" Spark Arresting Muffler

Fuel System
  • Gas Train (31.5 MJ/Nm3 with inlet pressure 19.2 to 48.3 kPa (2.78 to 7 psi))
  • Gas Train 0-100 kPag, 4-20mA pressure sensors
  • Fuel Filter, Gas Filter
  • 24VDC Gas Shutoff Valve, Gas Knockdown Regulator

Generator
  • Annunciator modules
  • Air filters, cable access box
  • Bearing temperature detectors
  • Low voltage extension box
  • 16 Point/32 light annunciator with NFPA99-110/CSA282 configuration
  • Extension box, European bus bars
  • Generator air filter
  • Medium and high voltage generators and attachment
  • 415/400/380, 3300/6600/11000 Volt Generator Options (50 Hz)
  • 480/4160/13200 Volt Generator Options (60 Hz)
  • 8/15/23M harness
  • 8.7/15 kV Cross, Differential, Current Transformers (CCCT, DCT, CT)
  • Cable access box

Governing System
  • Load share module

Starting/Charging
  • Battery diconnect switch
  • 45A, 24V charging alternator (requires engine driven pumps)
  • 24V Starting Motors
  • Jacket water coolant heater
  • 20A Battery Charger
  • Battery with cables and rack (shipped loose)

Application Centre

Explore valuable resources for generator sizing, specification, and training materials. SpecSizer evaluates load types, collects data, and organises it to help you select the generator set that's best for you. Find product comparisons, technical data, product sizing, and more using our technical information portal (TIP) specifically created for consultants, architects, engineers, and owners.

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