3512 (60 Hz)

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The 3512 diesel generator sets have been developed to meet your mission critical, continuous, standby and prime applications. Producing reliable power from 890 to 1250 ekW at 60 Hz, each generator set is designed to meet ISO 8528-5 transient response requirements and accept 100 percent rated load in one step. And each is designed for low fuel consumption reducing operating costs. Our integrated control system, including Cat® UPS, ATS and switchgear, secure your power supply and keep you connected to your fleet through on-site and remote monitoring options. Our EMCP4 control panel provides a flexible control platform, with an easy-to-use display — it's your single source for management and diagnostics tools. The EMCP 4.4 controller provides multi-generator set paralleling capability, giving you the ability to add generator sets to match your growing power requirements. It's not just quality that matters but customization, choose from a broad range of accessories and bolt-on system expansion attachments. Discover our flexible packaging options to work with your spatial restrictions and environmental conditions. Our 3512 generator sets are developed for such prerequisites, so that you can meet your specific power needs. For added safety select from one of the UL 2200 and CSA certified package options.

Generator Set Specifications

  • Minimum Rating 890 ekW 890 ekW
  • Maximum Rating 1250 ekW 1250 ekW
  • Emissions/Fuel Strategy Low Fuel Consumption Low Fuel Consumption
  • Voltage 220 to 13800 Volts 220 to 13800 Volts
  • Frequency 60 Hz 60 Hz
  • Speed 1800 rpm 1800 rpm
  • Length - Maximum 218.8 in 5556.0 mm
  • Width - Maximum 77.8 in 1975.0 mm
  • Height - Maximum 93.2 in 2367.0 mm

Engine Specifications

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

Design Criteria

The generator set accepts 100% rated load in one step per NFPA 110 and meets ISO 8528-5 transient response.

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
  • Generator

  • Matched to the performance and output characteristics of Cat engines
  • Industry leading mechanical and electrical design
  • Industry leading motor starting capabilities
  • High Efficiency
  • Cat EMCP Control Panel

    The EMCP controller features the reliability and durability you have come to expect from your Cat equipment. EMCP4 is a scalable control platform designed to ensure reliable generator set operation, providing extensive information about power output and engine operation. EMCP4 systems can be further customized to meet your needs through programming and expansion modules.

    Single-Source Supplier

    Fully prototype tested with certified torsional vibration analysis available

    World Wide Product Support

    Cat dealers provide extensive post-sale support including maintenance and repair agreements. Cat dealers have over 1,800 dealer branch stores operating in 200 countries. The Caterpillar S•O•S℠ program cost effectively detects internal engine component condition, even the presence of unwanted fluids and combustion by-products

    UL 2200 / CSA - Optional

  • UL 2200 listed packages
  • CSA Certified
  • Certain restrictions may apply.
  • Consult with your Cat® Dealer.
  • 3512 (60 Hz) Standard Equipment

    Air Inlet System

    • Air cleaner; single element canister type with service indicator

    Control Panel

    • EMCP 4.2
    • Features include:
    • Emergency stop pushbutton
    • 24-volt DC operation
    • Environmental sealed front face
    • Text alarm / event descriptions
    • Generator mounted - rear facing
    • Controls:
    • Auto/start/stop control
    • Engine cool-down timer
    • Engine cycle crank
    • Alarm acknowledge
    • Lamp test
    • True RMS AC metering, 3-phase, +/-2% accuracy
    • Digital indication for:
    • RPM
    • DC volts
    • Operating hours
    • Oil pressure (psi, kPa or bar)
    • Coolant temperature
    • Volts (L-L & L-N), frequency (Hz)
    • Amps (per phase & average)
    • Power factor (per phase & average)
    • kW (per phase, average & percent)
    • kVA (per phase, average & percent)
    • kVAr (per phase, average & percent)
    • kW-hr (total)
    • kVAr-hr (total)
    • Warning / shutdown with common LED indication of shutdowns for:
    • Low oil pressure
    • High coolant temperature
    • Overspeed
    • Emergency stop
    • Failure to start (overcrank)
    • Low coolant temperature
    • Low coolant level
    • Programmable protective relaying functions:
    • Generator phase sequence
    • Over / under voltage (27 / 59)
    • Over / under frequency (81 o / u)
    • Reverse Power (kW) (32)
    • Reverse Reactive Power (kVAr) (32RV)
    • Overcurrent (50 / 51)
    • Communications:
    • Customer data link (Modbus RTU)
    • Accessory module data link
    • Serial annunciator module data link
    • 6 programmable digital inputs
    • 4 programmable relay outputs (Form A)
    • 2 programmable relay outputs (Form C)
    • 2 programmable digital outputs

    Cooling System

    • JWAC
    • Radiator fan and fan drive
    • Fan and belt guards
    • Coolant drain line with valve
    • Coolant level sensors
    • Caterpillar Extended Life Coolant

    Exhaust System

    • Dry Exhaust Manifold.
    • Exhaust flange outlet(s)

    Fuel System

    • Secondary fuel filters
    • Fuel cooler; not included with packages without radiator
    • Flexible fuel lines - shipped loose
    • Fuel priming pump

    Generators and Attachments

    • 3 phase brushless, salient pole
    • 6 lead
    • Generator set packages include Caterpillar's Digital Voltage Regulator (CDVR)
    • CDVR includes reactive droop capability, 3-phase voltage sensing, KVAR/PF modes, RFI suppression, min/max exciter. Limiter and exciter diode monitor
    • LV:
    • Random wound
    • Internal Excitation
    • NEMA Class H insulation, Class H temperature rise at 40C ambient (125C prime/150C standby)
    • Winding temperature detectors
    • Busbar connections, top center mounted, top cable entry. 50 Hz models: IEC standard hole pattern
    • 1800 frames are form wound, permanent magnet, with winding temperature detectors

    Governing System

    • Woodward 2301A isochronous governor

    Lube System

    • Lubricating oil.
    • Gear type lube oil pump.
    • Integral lube oil cooler
    • Oil filter, filler and dipstick
    • Oil drain lines and valve
    • Fumes disposal

    Mounting System

    • Rails - engine/generator/radiator mounting
    • Rubber anti-vibration mounts (shipped loos

    Starting / Charging System

    • 24-volt electric starting motor
    • Battery and battery rack w/cables
    • Battery disconnect switch


    • Caterpillar Yellow with high gloss black rails & radiator
    • Right hand servicing
    • Flywheel and Flywheel housing-SAE No. 00
    • SAE Standard Rotation

    3512 (60 Hz) Optional Equipment

    Air Inlet System

    • Air cleaner - Dual element
    • Remote air inlet adapters
    • Air inlet protection

    Circuit Breakers

    • Optional busbar power connections
    • Breaker harnesses
    • Low voltage, IEC standard hole
    • Cable entry options
    • Enclosures - control packaging
    • EMAX breakers
    • Busbar connections
    • EMAX breaker connections

    Control Panels

    • EMCP 4.3, EMCP 4.4
    • Annunciator modules
    • Governors
    • Mounting group - External box clips
    • Auxiliary box
    • Customer interface options
    • Generator temperature monitoring

    Cooling System

    • 3512 MUI 1500 Radiators PGS
    • Water level switch gauges
    • Heat exchangers


    • European union certification
    • EU declaration of conformity
    • Eurasian conformity (EAC) mark
    • European directive genset DOI

    Exhaust System

    • Mufflers
    • Flexible fittings
    • Through wall installation kit

    Fuel System

    • Primary fuel filter

    Generators and Attachments

    • Generator conversions - IE and PM
    • Space heater kt


    • Pyrometers

    Lube System

    • Oil level reg-1 shallow pan
    • Electric prelube pumps
    • Manual prelube sump pumps

    Mounting System

    • Vibration Isolator options

    Protection System

    • Explosion relief valves

    Special Tests / Reports

    • Neutral grounding connection
    • Neutral ground - LV
    • PGS test report @ 1.0 power factor
    • PGS test report @ 0.8 power factor
    • IBC seismic certification

    Starting / Charging System

    • Charging alternators
    • Battery chargers (10 and 20 amp)
    • Battery sets - 24 Volt, dry
    • Electric starting motors - Duel 24 Volt
    • Starting aids
    • Jacket water heaters


    • Engine barring group - installed

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