3512 (60 Hz) with Upgradeable Package

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Cat Generator Set Package

  • 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

Cat Diesel Engine

  • 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

SR5 Alternator

  • Superior motor starting capability minimizes need for oversizing alternator
  • Designed to match performance and output characteristics of Cat diesel engines
  • Robust Class H insulation

EMCP 4 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

Cooling System

  • Designed to operate in standard ambient temperatures up to 50°C (122°F)
  • Contact your Cat Dealer for specific ambient and altitude capabilities


  • UL2200
  • CSA
  • IBC seismic certification
  • OSHPD pre-approval
  • EEC Declaration of Conformity

One Safe Source

  • 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

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

3512 (60 Hz) with Upgradeable Package 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 4.2
  • 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

3512 (60 Hz) with Upgradeable Package 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 4.2B, 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


Producing reliable power from 890 to 1250 eKW 60 Hz, our 3512 diesel generator sets are made to meet your mission critical, continuous, standby and prime applications. We've designed each to ISO 8528-5 transient response requirements and to accept 100 per cent rated load in one step. Generator sets are optimized for low fuel consumption.

Generator Set Specifications

Minimum Rating 890 eKW 890 eKW Less
Maximum Rating 1250 eKW 1250 eKW Less
Emissions/Fuel Strategy Low Fuel Consumption Low Fuel Consumption Less
Voltage 380 to 480 Volts 380 to 480 Volts Less
Frequency 60 Hz 60 Hz Less
Speed 1800 rpm 1800 rpm Less
Duty Cycle Standby, Mission Critical, Prime, Continuous Standby, Mission Critical, Prime, Continuous Less

Engine Specifications

Engine Model 3512A, V-12, 4-Stroke Water-Cooled Diesel 3512A, V-12, 4-Stroke Water-Cooled Diesel Less
Bore 6.69 in 170.0 mm Less
Stroke 7.48 in 190.0 mm Less
Displacement 3161.03 in³ 51.8 l Less
Compression Ratio 13.5:1 13.5:1 Less
Aspiration TA TA Less
Fuel System MUI MUI Less
Governor Type Woodward Woodward Less

Generator Set Dimensions

Length - Maximum 203.5 in 5169.0 mm Less
Width - Maximum 79.3 in 2015.0 mm Less
Height - Maximum 92.0 in 2336.0 mm Less
Dry Weight - Genset (minimum) 22099.0 lb 10024.0 kg Less
Dry Weight - Genset (maximum) 22540.0 lb 10224.0 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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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.

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