New | 3512 with Upgradeable Package

The 3512A generator set withUpgradeable Packaging has been developed for a wide range of applications, from emergency standby installations such as healthcare and datacenters to continuously powering remote installations. The packages can be optimized for performance that matters to you with either low emissions or low fuel consumption versions available. Backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty, Cat generator sets will provide the reliability and durability you expect.

Generator Set Specifications
Minimum Rating890 eKW
Maximum Rating1250 eKW
Emissions/Fuel StrategyLow Fuel Consumption
Voltage380 to 480 Volts
Frequency60 Hz
Speed1800 rpm
Duty CycleStandby, Mission Critical, Prime, Continuous
Engine Specifications
Engine Model3512A, V-12, 4-Stroke Water-Cooled Diesel
Bore6.69 in
Stroke7.48 in
Displacement3161.03 in³
Compression Ratio13.5:1
Fuel SystemMUI
Governor TypeWoodward
Generator Set Dimensions
Length - Maximum203.5 in
Width - Maximum79.3 in
Height - Maximum92 in
Dry Weight - Genset (minimum)22099 lb
Dry Weight - Genset (maximum)22540 lb

  • cat Generator Set Packages Have Been Fully Prototype Tested
  • accepts 100% Block Load In One Step And Meets Nfpa 110 Loading Requirements
  • conform To Iso 8528-5 Steady State And Transient Response Requirements

  • reliable, Rugged, Durable Design
  • field-Proven In Thousands Of Applications Worldwide
  • four-Stroke-Cycle Diesel Engine Combines Consistent Performance And Excellent Fuel Economy With Minimum Weight

  • superior Motor Starting Capability Minimizes Need For Oversizing Alternator
  • designed To Match Performance And Output Characteristics Of Cat Diesel Engines
  • robust Class H Insulation

  • 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

  • designed To Operate In Standard Ambient Temperatures Up To 50°c (122°f)
  • contact Your Cat Dealer For Specific Ambient And Altitude Capabilities

  • components Used In The Generator Set Are Selected Based On Seamless Design Integration To Provide The Optimum Performance
  • the Generator Set Is Fully Assembled At A Caterpillar Facility Following Our Quality Guidelines
  • each Generator Set Package Is Tested Before Leaving The Caterpillar Facility
  • cat Product Support, Including Dealer Service, Parts And Warranty Covers The Entire Cat Power System

  • 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

Standard Equipment

Air Inlet System
  • Air cleaner; single element canister type with service indicator
Control Panel
  • Auto / start / stop control
  • True RMS AC metering, 3-phase, +/-2% accuracy
  • kVAr-hr (total)
  • EMCP 4.2B
  • kVAr (per phase, average & percent)
  • Customer data link (Modbus RTU)
  • KVAR/PF modes, RFI suppression, min/max exciter
  • Overcurrent (50/51)
  • IVR includes reactive droop capability, 3-phase voltage sensing
  • Generator phase sequence
  • 6 programmable digital inputs
  • Engine cool-down timer
  • Limiter and exciter diode monitor
  • Over / under voltage (27/59)
  • Low coolant temperature
  • Generator set packages include Caterpillar's Voltage Regulator (IVR).
  • Accessory module data link
  • Low oil pressure
  • Over / under frequency (81 o/u)
  • Generator mounted - rear facing
  • Reverse reactive power (kVAr) (32RV)
  • Emergency stop
  • Lamp test
  • Overspeed
  • kVA (per phase, average & percent)
  • Operating hours
  • DC volts
  • Low coolant level
  • Programmable protective relaying functions:
  • Frequency (Hz)
  • Amps (per phase & average)
  • Environmental sealed front face
  • Failure to start (overcrank)
  • Power Factor (per phase & average)
  • Controls:
  • kW (per phase, average & percent)
  • Oil pressure (psi, kPa or bar)
  • 24-volt DC operation
  • 4 programmable relay outputs (Form A)
  • Emergency stop pushbutton
  • 2 programmable relay outputs (Form C)
  • RPM
  • Digital indication for:
  • Engine cycle crank
  • Speed adjust
  • Coolant temperature
  • 2 programmable digital outputs
  • Text alarm / event descriptions
  • Serial annunciator module data link
  • Communications:
  • kW-hr (total)
  • Volts (L-L & L-N)
  • Alarm acknowledge
  • Warning / shutdown with common LED indication of shutdowns for:
  • Reverse power (kW) (32)
  • High coolant temperature
Cooling System
  • Coolant level sensors. (Not included with packages without radiator)
  • Coolant drain line with valve
  • Fan and belt guards.
  • JWAC
  • Caterpillar extended life coolant. (Not included with packages without radiator, installed SF44CTS, shipped loose radiators or heat exchangers)
  • Caterpillar extended life coolant. (Not included with packages without radiator, installed SF44CTS, shipped loose radiators or heat exchangers)
  • Dry Exhaust Manifold
  • Flanged faced outlet(s)
Fuel System
  • Fuel priming pump
  • Fuel cooler; not included with packages without radiator
  • Secondary fuel filters
  • Flexible fuel lines - shipped loose
Generators and Attachments
  • Internal excitation or permanent magnet
  • Winding temperature detectors
  • 6 Lead
  • LV:
  • 60 Hz models: NEMA standard hole pattern
  • Busbar connections, top center mounted, top cable entry
  • 3 Phase brushless, salient pole
  • Random wound
  • NEMA Class H insulation
  • Class H temperature rise at 40C ambient (125C prime / 150C standby)
  • KVAR/PF modes
  • Exciter diode monitor
  • Caterpillar's Digital Voltage Regulator (CDVR) includes:
  • RFI suppression
  • Reactive droop capability
  • Min / max exciter limiter
  • Note: 1800 frames are form wound, permanent magnet, with winding temp detectors
  • Generator set packages include: Regulator (CDVR)
  • 3 Phase voltage sensing
Governing System
  • Woodward 2301A isochronous governor
Lube System
  • Fumes disposal
  • Lubricating oil
  • Gear type lube oil pump
  • Oil filter, filler and dipstick
  • Integral lube oil cooler
  • Oil drain lines and valve
Mounting System
  • Rails - engine/generator/radiator mounting
  • Rubber anti-vibration mounts (shipped loose)
Starting / Charging System
  • 24-volt electric starting motor
  • Battery and battery rack w/cables
  • 50 Amp charging alternator
  • Battery disconnect switch
  • Flywheel and Flywheel housing-SAE No. 00
  • SAE Standard Rotation
  • RH Service
  • Paint - Caterpillar yellow with high gloss black rails & radiator

Optional Equipment

Air Inlet System
  • Single stage air cleaners
  • Dual element air filters
Circuit Breakers
  • 2000, 2500, 3200 and 4000 Amp, 4 pole, IEC rated circuit breakers
Control Panels
  • Remote custom annunicator
  • CAN2 Network equipment
  • Modbus monitoring of packages
  • EMCP 4.3, EMCP 4.4
  • Local discrete I/O package
  • Vandle proof panel door
  • Cat connect
  • Load share module options
  • First local annunciator
Cooling System
  • Coolant
  • Water level gauge
  • Optional radiator arrangements
Exhaust System
  • Exhaust flexible fitting
  • Industrial grade (15 db) mufflers
  • Exhaust elbows
  • Exhaust Y adapters
Generators and Attachments
  • Space heater control
  • Space heater
  • Generator conversion
  • Space heater
  • Space heater control
  • 1500 RPM, 380/400/415volts @ 50 Hz, 3 phase, random wound, permanent magnet, No. of leads = 6, pitch= 0.6667
  • 1500 RPM, 380/400/415volts @ 50 Hz, 3 phase, form wound, permanent magnet, No. of leads = 6, pitch= 0.6667
Lube System
  • Oil level regulator
  • Lube oil
  • Primary fuel systems
  • Prelube sump pump
  • Oil level regulator
Special Tests / Reports
  • Genset tors vibration analysis
  • PGS test report @ 1.0 power factor
  • PKG factory test report
  • Standard genset TVA report
  • Standard engine test charge
  • Fuel consumption test
  • Generator test report
  • Standard engine test charge
  • PGS test report @ 0.8 power factor
  • PGS test report @ 1.0 power factor
  • Torsional vibration analysis
  • Generator test report
Crankcase System
  • Protection systems
  • Ventilation system
  • Protection systems
  • Ventilation system
Batteries and Battery Housing
  • Battery chargers - 10, 20 and 35 amp
  • 24 Volt battery set - Dry
  • Battery chargers - 10, 20 and 35 amp
  • 24 Volt battery set - Dry
Mounting System
  • Spring type vibration isolator
  • Puck style low efficiency lsolators
  • IBC vibration isolators
  • Spring type vibration isolator
  • Pyrometer and thermocouples
Protection System
  • Explosion relief valve
Starting / Charging Systems
  • Oversize battery set
  • Jacket water heater
  • Electric starting motors
  • Jacket water heaters
  • 24 Volt dual electric starting motor
  • Starter covers
  • Barring devices
Power Connection System
  • Breaker power connections
  • EMCP voltage and current sensing groups
  • Center post busbar
Circuit Breaker - LV Packages
  • Electronically operated circuit breakers
  • Right hand power connections






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Why Cat is Better. Machine Comparison

With only a few days notice, we were able to get the emergency system working properly. Hawthorne Cat provided great leadership and excellent field support.
Mark Cripe
Helix Electric

San Diego - Power
Kyle Farmer
Engine Business Manager
858.376.6821 office
760.715.9565 mobile

Tim Roberts
Product Support
General Manager
858.376.6820 office
858.583.8460 mobile

Mark Reza
Used Engine Sales Manager
858.376.6840 office
858.688.0076 mobile

Phillip J. Smith (PJ)
Field Service Manager
858.376.6874 office
858.688.0134 mobile

Hawaii – Power
Cliff Yuen
Director of Sales & Rentals
808.676.0322 office
808.349.7767 mobile

Guam – Power
Myver Hecita
Power Systems Rental &
Sales Representative
671.649.4241 office
671.898.2740 mobile