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Emissions

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

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 provide extensive post-sale support including maintenance and repair agreements. Cat dealers have over 1,800 dealer branch stores operating in 200 countries. The Caterpillar S•O•S℠„ program cost effectively detects internal engine component condition, even the presence of unwanted fluids and combustion by-products

CAT SR5 Generator

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

CAT EMCP4.3 Control Panel

The EMCP controller features the reliability and durability you have come to expect from your Cat equipment. EMCP4.3 is a scalable control platform designed to ensure reliable generator set operation, providing extensive information about power output and engine operation. EMCP4.3 systems can be further customized to meet your needs through programming and expansion modules.

Proven System

Field proven in a wide range of apllications worldwide, fully protype tested, and certified torsional vibration analysis available

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

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

G3520E Standard Equipment

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

Control Panel
  • EMCP 4.3

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

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

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

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

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

General
  • RH Service

G3520E Optional Equipment

Air Inlet
  • Regular duty air cleaner
  • Heavy duty air cleaner

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

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

Exhaust
  • 356-406mm Flange and Exhaust Expander
  • 305/356mm Flange/Exhaust Expanders, 305/406mm Flange and Exhaust Expander
  • 305/360/406 mm Elbow Kits
  • Mufflers (15/18/25 dBA Attenuation) and spark-arresting muffler with ANSI companion flanges
  • Flexible Fittings
  • 15/18/25 dBA Muffler Attenuation
  • 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
  • Low voltage extension box
  • Cable access box
  • Bearing temperature detectors
  • Generator air filter
  • Medium and high voltage generators and attachment
  • 8.7/15 kV Cross, Differential, Current Transformers (CCCT, DCT, CT)
  • Annunciator modules
  • 415/400/380, 3300/6600/11000 Volt Generator Options (50 Hz)
  • 480/4160/13200 Volt Generator Options (60 Hz)
  • 16 Point/32 light annunciator with NFPA99-110/CSA282 configuration
  • 8/15/23M harness
  • Extension box, European bus bars
  • Air filters, cable access box

Governing System
  • Load share module

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

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 Sets Specification

Units:
Maximum Continuous Rating 2022 2022 Less

Generator Set Specifications

Fuel Type Natural Gas Natural Gas Less

Generator Sets Specifications

Maximum Electrical Efficiency 41.50% 41.50% Less
Maximum Standby Rating 2022 2022 Less
Frequency 50 50 Less
RPM 1500 1500 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

Engine Specifications

Engine Model G3520E G3520E Less
Displacement 5248.0 86.0 l Less
Aspiration TA TA Less
Bore 6.7 in 170.0 mm Less
Stroke 7.5 in 190.0 mm Less
Compression Ratio 11.9 11.9 Less
Fuel System Natural Gas Natural Gas Less

Why Choose Cat® Electric Power?

Caterpillar offers a comprehensive variety of electric power systems, customised to fit your needs. Our specialised systems deliver high power and performance in industries across the globe. With Caterpillar, you get outstanding manufacturing quality, expert support, and the essential tools and applications to complete any project.

Learn More About Electric Power

EMCP 4 Generator Set Controls

Cat generator sets provide a complete factory-built solution with fully featured standard and advanced controls. Optional accessories enhance the capabilities of the genset package-mounted control system.

Learn More

Application Center

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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