(2) 2020 CAT G3520H 2.469MW Natural Gas Generator Sets

4160V | 60Hz | Enclosed | Factory Tested | Two Units Available

ARC Power Systems is offering a matched pair of 2020 CAT G3520H high-efficiency natural gas generator packages. Each unit was factory tested at 2,469 kW, 4160V, 60Hz, 3-phase and 0.80 power factor, providing up to 4.938 MW of combined factory-rated generation capacity.

These are complete, project-engineered generator packages, not bare engines or incomplete open-skid generator sets. Each CAT G3520H is installed in a Wedlake weather-resistant walk-in enclosure with an engine-driven radiator, CAT SR5 medium-voltage alternator, EMCP 4.3 controls, local annunciator, critical-grade exhaust silencer, auxiliary electrical system, batteries, charger, jacket water heater, spill-containment skid and supporting package equipment.

Both generator sets have individual CAT factory test reports documenting successful full-load testing and load rejection testing. They are represented as new surplus project equipment and unused in commercial service, subject to inspection and confirmation of current operating hours and preservation history.

Key Specifications

• Quantity: Two matched generator packages
• Manufacturer: CAT / Caterpillar
• Model: G3520H
• Model year: 2020
• Fuel: Natural gas
• Factory-tested output: 2,469 kW each
• Combined factory-rated output for both units: 4,938 kW
• Approximate generator capacity: 3,086 kVA each
• Voltage: 4160V
• Frequency: 60Hz
• Phase: 3-phase
• Power factor: 0.80
• Rated current: Approximately 428 amps
• Engine configuration: V20
• Engine displacement: 97.5 liters / 5,956 cubic inches
• Engine rating: Approximately 3,448 bhp
• Engine speed: 1500 RPM
• Generator speed: 1800 RPM through speed-increasing gearbox
• Aspiration: Turbocharged
• Aftercooling: Separate circuit aftercooled
• Combustion: Low-emission natural gas
• Documented NOx setting: 1.0 g/bhp-hr engine-out
• Application classification: Stationary use only

CAT SR5 Generator

• CAT SR5 medium-voltage alternator
• 3044 frame
• 3-phase brushless design
• Form-wound construction
• Permanent magnet excitation
• Integrated voltage regulator
• NEMA Class H insulation
• Class F temperature rise at 40°C ambient
• Winding temperature detectors
• Bearing temperature monitoring
• Anti-condensation space heaters
• Adjustable voltage droop and paralleling capability
• Approximately ±0.5% steady-state voltage regulation

Controls and Protection

• CAT EMCP 4.3 generator controller
• CAT ADEM A4 engine control system
• Local RS-485 annunciator
• Integrated voltage regulator
• RTD temperature monitoring module
• Remote monitoring and control capability
• Automatic start and stop control
• Emergency stop
• Speed and voltage adjustment
• True RMS 3-phase AC metering
• Generator phase-sequence protection
• Over-voltage and under-voltage protection
• Over-frequency and under-frequency protection
• Overcurrent and current-balance protection
• Reverse power and reverse reactive power protection
• Over-excitation and loss-of-excitation protection
• Engine detonation-sensitive timing
• High exhaust temperature protection
• Gearbox oil pressure and temperature protection

Natural Gas Fuel System

The CAT low-pressure natural gas system is designed for project-specific fuel analysis and includes an electronic fuel-control valve, electronically controlled throttle, gas-pressure regulation and associated engine controls.

The documented remote gas-train configuration includes:

• Manual shutoff valve
• One-micron gas filter
• Differential pressure indication
• Gas-pressure regulator
• Dual 24V energized-to-run gas shutoff valves
• High- and low-pressure switches
• Visual valve-position indicators
• Flexible braided fuel connection

The original project fuel-pressure range was approximately 2 to 5 psig at the engine fuel-control valve. Final output and fuel consumption must be validated against the buyer’s actual gas composition, methane number, heating value, pressure, altitude and ambient temperature.

Project Performance Data

The units were engineered around two project gas conditions:

• Estimated net output on normal residue gas: Approximately 2,363 ekW per unit
• Estimated net output on rich start-up gas: Approximately 2,048 ekW per unit
• Factory electrical test rating: 2,469 kW per unit
• Generator efficiency at the documented normal-gas site condition: Approximately 97.4%
• Documented genset electrical efficiency before package auxiliary deductions: Up to approximately 43.6%

Final site rating must be confirmed through a project-specific gas analysis and CAT performance evaluation.

Cooling Package

• Engine-driven radiator
• Separate jacket-water and aftercooler circuits
• Engine-driven jacket-water and SCAC pumps
• 50/50 glycol and water coolant configuration
• Approximately 111,000 SCFM documented radiator airflow
• 98-inch, eight-blade radiator fan
• Original radiator design based on a 97°F project ambient condition
• Radiator access panel integrated into enclosure
• Engine drain connections routed to enclosure connection plate

Wedlake Weather-Resistant Enclosure

• Walk-in Wedlake Weatherguard enclosure
• 14-gauge galvanized steel construction
• 120 MPH documented wind rating
• Carlsbad Canyon Tan exterior finish
• Perimeter drip-rail system
• Screened fixed intake and discharge louvers
• Lockable single and double access doors
• Exterior-mounted critical-grade silencer
• Integrated lifting points
• Rooftop personnel anchor rings
• Radiator access panel
• Cleanout access panel
• Integrated skid and spill containment
• Interior service walkways
• Interior lighting
• GFCI service receptacles

The enclosure is weather resistant.

Exhaust System

• 18-inch critical-grade exhaust silencer
• Spark-arresting design
• Carbon-steel construction
• Flexible CAT-to-ANSI exhaust connection
• 18-inch rain cap
• Roof-mounted exhaust arrangement

Auxiliary Electrical Equipment

• 100-amp, 120/208V auxiliary load center
• Wet-location-rated interior LED lighting
• 120V and 24V lighting circuits
• Timed service lighting
• 20-amp GFCI receptacles
• EMT conduit
• Copper THHN wiring
• CAT batteries and battery rack
• 20-amp battery charger
• 24V electric starting system
• Battery disconnect
• Jacket-water heater
• 60-amp engine-driven charging alternator
• NEMA 3R neutral grounding resistor

Approximate Dimensions and Weight Per Unit

37'L x 13'W x 15'H @ approximately 72k lbs. EACH

Factory Testing and Documentation

Both generator sets passed CAT factory testing in February 2020. The available documentation includes:

• Individual CAT factory test reports
• Full-load performance results
• 100% load-rejection test results
• Generator and engine technical data
• Project-specific fuel-performance calculations
• Radiator sizing data
• Transient response data
• EMCP 4.3 control documentation
• Electrical and mechanical drawings
• Wedlake enclosure bill of materials
• Exhaust-system drawings
• Fuel-train documentation
• Storage and preservation instructions

Detailed technical documentation is available to qualified buyers.

Potential Applications

These CAT G3520H generator packages are suitable for properly engineered:

• Industrial prime and continuous power
• Behind-the-meter generation
• Data center base-load and bridge-power projects
• AI data center power infrastructure
• Microgrids
• Utility capacity support
• Manufacturing facilities
• Oil and gas operations
• Combined heat and power projects
• Parallel utility operation

Rare Matched-Pair Opportunity

Late-model, medium-voltage CAT G3520H packages in a documented two-unit configuration are rarely available on the secondary market. These units provide buyers with complete enclosed generation packages, factory test documentation and nearly 5 MW of combined factory-rated natural gas generation capacity.

The packages may significantly reduce the engineering, fabrication and procurement required when compared with sourcing bare generator sets and separately integrating cooling, controls, exhaust, auxiliary electrical equipment and outdoor enclosures.

Contact ARC Power Systems for pricing, inspection requirements, technical documentation and purchase options.

All information is based on available manufacturer documentation and seller representations. Ratings are fuel- and site-dependent.

Equipment is offered as-is, where-is, subject to inspection, final scope verification and prior sale.

ARC Power Systems

Industrial Generators • Gas Turbines • Power Plant Equipment

🌐 www.arcpowersystems.com

📧 sales@arcpowersystems.com

📞 Call or Text: (213) 371-2848