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CAT G3512E 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 Generator

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

EMCP II+ 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

G3512E Standard Equipment

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

Control Panel
  • EMCP 4.3

Cooling
  • Jacket water and SCAC engine-driven pumps
  • Jacket water and SCAC thermostats

Exhaust
  • Dry exhaust manifolds, insulated and shielded
  • Individual exhaust port and turbocharger outlet wired to integrated temperature sensing module (ITSM) with GCEM providing alarms and shutdowns
  • Cat-flanged face outlet on turbocharger

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 3.5 kPa to 34.5 kPa to the engine fuel control valve
  • Engine-installed electronic control valve
  • 24V DC energized-to-run (ETR) gas shutoff valve
  • Gas pressure regulator

Fuel system
  • Electronic fuel metering valve
  • 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

General
  • Paint- Caterpillar Yellow except rails are gloss black
  • Parts book
  • Crankshaft vibration damper and guard
  • Operation and maintenance manuals
  • RH Service

Generator
  • SR4B
  • Permanent Magnet Excitiation
  • Caterpillar's Digital Voltage Regulator (CDVR) including reactive droop capability, 3-phase voltage sensing, KVAR/PF modes, RFI suppression, and a min/max exciter
  • Anti-condensation space heater
  • Winding temperature detectors
  • NEMA Class H insulation

Governing System
  • ADEM A4

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

Starting/Charging
  • Electric Starter

G3512E Optional Equipment

Air Inlet
  • Mounting brackets and piping
  • Air cleaner with precleaner

Circuit Breakers
  • Frame mounting
  • Right, left, rear mounted
  • 3-pole (IEC 947-2 rated)
  • 100% rated, 3-pole (UL/CSA/IEC) 5th Digit Rating
  • S LSI, G LSIG, P LSIG-P, 4th Digit Type
  • 1200A, 3 Pole, UL-100% Rated P-Frame Circuit Breakers
  • 1600A, 2000A 3 Pole, UL-100% Rated R-Frame Circuit Breakers
  • 2000A 3 Pole, UL-100% Rated Masterpact Circuit Breakers

Control Panels
  • Local alarm module

Cooling
  • Remote radiator for JW and SCAC circuits, level switch included but not wired
  • Coolant level drain line with valves, fan with guard
  • Inlet/Outlet connections

Control Panel
  • Local alarm module
  • Remote annunciator
  • Local PC monitoring
  • Remote PC monitoring
  • Engine failure relay

Exhaust
  • 305 mm (12 in.) Flange
  • 250mm-329mm Flange Expander
  • Flexible fittings

Fuel System
  • Remote mounted gas train, sized for 31.5 MJ/Nm3 (800 btu/cu ft) dry pipeline natural gas with inlet pressure range of 19.2 to 48.3 kPa (2.78 to 7 psi).

General
  • US AID emblem
  • Special paint order
  • Tool set
  • Digital diagnostic tool

Generator
  • Cable access box
  • Bearing temperature detectors
  • Generator air filter
  • European bus bars

Starting/Charging
  • 24V starting motors
  • Battery with cables and rack (shipped loose)
  • Jacket water heater
  • 45A, 24V charging alternator (requires engine driven pumps)
  • 20A, 24VDC battery charger

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 1200 ekW 1200 ekW Less

Generator Set Specifications

Fuel Type Natural Gas Natural Gas Less
Maximum Electrical Efficiency 42.30% 42.30% Less
Maximum Standby Rating - - Less
Frequency 50 Hz 50 Hz Less
Speed 1500 rpm 1500 rpm Less

Engine Specifications

Bore 6.7 in 170.0 mm Less
Aspiration TA TA Less
Engine Model G3512E G3512E Less
Stroke 7.5 in 190.0 mm Less
Displacement 3158.0 in³ 52.0 l Less

Generator Set Dimensions

Length 181.0 in 4594.0 mm Less
Width 65.0 in 1647.0 mm Less
Height 89.0 in 2255.0 mm Less
Dry Weight - Genset 27475.0 lb 12460.0 kg Less

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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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