Overview
G3520H Gas Generator
Specifications
Units:
| Continuous Rating | 2519 / 2500 ekW @ 1.0pf |
| Fuel Type | Natural Gas, Hydrogen Blend (up to 25%) |
| Maximum Electrical Efficiency | 45.30% |
Benefits & Features
Cat G3520H 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 and hydrogen mixtures
- 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
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
October 21, 2025
Specifications
Units:
| Continuous Rating | 2519 / 2500 ekW @ 1.0pf |
| Fuel Type | Natural Gas, Hydrogen Blend (up to 25%) |
| Maximum Electrical Efficiency | 45.30% |
| Frequency | 50 / 60 Hz |
| RPM | 1500 |
| Frequency | 50/60 Hz |
| Engine Model | G3520H |
| Displacement | — |
| Aspiration | TA |
| Bore | — |
| Stroke | — |
| Compression Ratio | 12.1 |
| Length | — |
| Width | — |
| Height | — |
| Dry Weight - Genset | — |
Benefits & Features
Cat G3520H 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 and hydrogen mixtures
- 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
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
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
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
Data not available.
Standard Equipment
- Control Panel
- EMCP 4.3
- Air Inlet
- Two-element single-stage air cleaner with enclosure and service indicator
- Cooling
- Engine driven water pumps for jacket water and aftercooler
- Jacket water and SCAC thermostats
- ANSI/DN customer flange connections for JW inlet and outlet
- Circuit Breaker
- LSI Long-Time, Short-Time, Instantaneous Annunciator
- Rear-mounted
- 5000A 3-Pole IEC Rated Circuit Breakers
- 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
- Throttle plate, 24V DC actuator, controlled by GECM
- 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
- Ignition System
- Electronic Ignition System (controlled by ADEM A4)
- Individual Cylinder Detonation Sensitive Timing (DST)
- Generator
- Caterpillar's Digital Voltage Regulator (CDVR) with 3-phase sensing and KVAR/PF control
- SR4B
- Crankshaft Vibration Damper and Guard
- Busbar connections
- Paint- Caterpillar Yellow except rails gloss black
- Winding temperature detectors
- Operation and maintenance manuals
- Parts book
- Anti-condensation space heater
- RH Service
- SR5
- Reactive droop
- Govrerning System
- ADEM A4 4-20mA (0-5VV) Speed Input
Optional Equipment
- Air Inlet
- Mounting Brackets and Piping
- Air cleaner with precleaner
- Circuit Breaker
- MP- Frame 6 Pole Bottom Cable Entry
- 4000/5000A Neutral Current Transformer Automatic Selection
- No UV trip or package mounted CB Wiring
- Frame Mounting
- Control Panel
- 16 Point/32 Light Annunciator, Shipped Loose
- Remote Communications Module (PL1000T, PL1000E)
- Remote annuciator
- Local PC Monitorring
- Discrete I/O Module, 12 Digital Inputs, 8 'Form C' Relay
- Cat Connect: Ehternet, Satellite, Cell Telematics
- Engine failure relay
- Local alarm module
- Synchronizing module
- Remote PC Monitorring
- Cooling
- Inlet/Outlet connections
- Coolant level drain line with valves, fan with guard
- Exhaust
- Muffler and spark-arresting muffler with companion flanges
- Flange
- Elbow
- Flexible Fitting
- Exhaust Expander
- Fuel System
- Gas Knockdown Regulator
- Fuel filter
- Gas pressure regulator
- Gas shutoff valve 24V, ETR (Energized-To-Run)
- Generator
- Bearing temperature detectors
- Cable access box
- Low voltage extension box
- Manual voltage control
- European bus bar
- Generator air filter
- Medium and high voltage generators and attachment
- General
- Digital diagnostic tool
- Special paint order
- Tool set
- US AID Emblem
- Starting/Charging
- Battery with cables and rack (shipped loose)
- 24V starting motors
- Jacket water heater
- 60A, 24V charging alternator (requires engine driven pumps)
- Grid Code Compliance
- 60 Hz: USA
- 50 Hz: Germany, Great Britain, Belgium, Romania, Italy, Ireland, Poland, Netherlands, Spain, France, and European Standard