Gas generator sets

G3512K

From natural gas to biogas, coal mine gases, or hydrogen fuel blends to support combined heat and power (CHP), emergency power, and local grid support applications, Caterpillar has a wide range of reliable gas power solutions.

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Cat G3520K 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

Cat Energy Control System (Cat ECS)

A cost effective but powerful system
Modern color touch screen
Meets UL6200 controls and UL2300 3rd ed. generator set package requirements
Local annunciation to meet NFPA 110

Emissions

Meets most worldwide emissions requirements down to 0.5 g/bhp-hr or 250 mg/Nm3 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

Up to 45.3% Electrical Efficiency

Industry leading 45.3% electrical efficiency on a 1.5 MW package.

As low as 6 minute Start to Full Load Time

Faster start-to-full-load performance and improved transient response enable the G3512K to become available more quickly and adapt seamlessly to rapid load changes

Fuel Flexible

Multiple fuel options with natural gas and propane available now. Biogas, sewage and landfill gas, coal mine methane (CMM), and up to 25% hydrogen cofigurations coming in 2026

Generator Set Specifications
Continuous Rating	1530 ekW @ 1.0pf
Fuel Type	Natural Gas & Propane
Maximum Electrical Efficiency	45.3%
Frequency	50 / 60 Hz
RPM	1500
Speed	1500 RPM
Frequency	50/60 Hz

Engine Specifications
Engine Model	G3512K
Displacement	3576 in³
Aspiration	TA
Bore	6.7 in
Stroke	8.5 in
Compression Ratio	10.5
Governor Type	Adem 6

Generator Set Dimensions
Length	215 in
Width	71.97 in
Height	89.49 in
Dry Weight - Genset	37,082 lb

Cooling

Engine driven water pumps for jacket water and aftercooler.
SCAC control valve
Jacket water and SCAC thermostats.
ANSI/DN customer flange connections for JW inlet and outlet.

Control Panel

ECS 100 with colored HMI
Ethernet Telematics

Air Inlet

Two-element single-stage air cleaner with enclosure and service indicator.

Governing System

ADEM 6

Exhaust

Center section cooled turbocharger with Cat flanged outlet.
Dry exhaust manifolds, insulated and shielded.
Individual exhaust port and turbocharger outlet wired to Integrated Tmeperature Sensing Module (ITSM) with GECM providing alarms and shutdowns.

Fuel System

Electronic fuel metering valve
EN7462/CSAB149:3, NFPA37
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.