3512B (60 Hz) with Upgradeable Package

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Producing reliable power from 1230 to 1500 ekW at 60 Hz, our 3512B 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 offer both low fuel consumption and low emission systems.

Generator Set Specifications

Minimum Rating 1230 eKW 1230 eKW Less
Maximum Rating 1500 eKW 1500 eKW Less
Emissions/Fuel Strategy Low Fuel, Low Emissions Low Fuel, Low Emissions 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 3512B TA, V-12, 4-Stroke Water-Cooled Diesel 3512B TA, 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 51.8 in 3161.03 l Less
Compression Ratio 14.0:1 Std 15.5:1 HD 14.0:1 Std 15.5:1 HD Less
Aspiration TA TA Less
Fuel System Electronic Unit Injection Electronic Unit Injection Less
Governor Type ADEM™A3 ADEM™A3 Less

Generator Set Dimensions

Length - Maximum 207.8 in 5279.0 mm Less
Width - Maximum 90.0 in 2286.0 mm Less
Height - Maximum 94.9 in 2409.0 mm Less
Dry Weight - Genset (minimum) 24297.0 lb 11021.0 kg Less
Dry Weight - Genset (maximum) 24959.0 lb 11321.0 kg Less

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 at the design stage to provide optimum package 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

3512B (60 Hz) with Upgradeable Package Standard Equipment

Air Inlet System
  • Air cleaner; single element canister type with service indicator

Control System
  • True RMS AC metering, 3-phase, +/-2% accuracy

Control Panel
  • DC volts
  • 24-volt DC operation
  • kVA (per phase, average & percent)
  • Engine cool-down timer
  • Coolant temperature
  • kW-hr (total)
  • Amps (per phase & average)
  • Over / under frequency (81 o/u)
  • Text alarm / event descriptions
  • Accessory module data link
  • Alarm acknowledge
  • Warning / shutdown with common LED indication of shutdowns for:
  • Auto / start / stop control
  • Controls:
  • Failure to start (overcrank)
  • Generator mounted - rear facing
  • kVAr (per phase, average & percent)
  • kVAr-hr (total)
  • Reverse reactive power (kVAr) (32RV)
  • Volts (L-L & L-N)
  • Serial annunciator module data link
  • 4 programmable relay outputs (Form A)
  • Lamp test
  • Operating hours
  • Overcurrent (50/51)
  • kW (per phase, average & percent)
  • Communications:
  • 6 programmable digital inputs
  • RPM
  • Engine cycle crank
  • 2 programmable relay outputs (Form C)
  • IVR includes reactive droop capability, 3-phase voltage sensing
  • High coolant temperature
  • Digital indication for:
  • Environmental sealed front face
  • Power Factor (per phase & average)
  • Speed adjust
  • Emergency stop pushbutton
  • Limiter and exciter diode monitor
  • Low oil pressure
  • EMCP 4.2B
  • Low coolant level
  • 2 programmable digital outputs
  • KVAR/PF modes, RFI suppression, min/max exciter
  • Oil pressure (psi, kPa or bar)
  • Customer data link (Modbus RTU)
  • True RMS AC metering, 3-phase, +/-2% accuracy
  • Overspeed
  • Frequency (Hz)
  • Emergency stop
  • Generator set packages include Caterpillar's Voltage Regulator (IVR).
  • Reverse power (kW) (32)
  • Low coolant temperature
  • Generator phase sequence
  • Programmable protective relaying functions:
  • Over / under voltage (27/59)

Cooling System
  • Caterpillar extended life coolant. (Not included with packages without radiator, installed SF44CTS, shipped loose radiators or heat exchangers)
  • Fan and belt guards.
  • JWAC
  • Coolant drain line with valve
  • Coolant level sensors. (Not included with packages without radiator)

  • Dry Exhaust Manifold
  • Flanged faced outlet(s)

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

Generators and Attachments
  • NEMA Class H insulation
  • Winding temperature detectors
  • Internal excitation or permanent magnet
  • LV:
  • 6 Lead
  • 60 Hz models: NEMA standard hole pattern
  • Class H temperature rise at 40C ambient (125C prime / 150C standby)
  • 3 Phase brushless, salient pole
  • Busbar connections, top center mounted, top cable entry
  • Random wound

Governing System
  • Woodward 2301A isochronous governor

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

Mounting System
  • Rails - engine/generator/radiator mounting
  • Rubber anti-vibration mounts (shipped loose)

Starting / Charging System
  • Battery disconnect switch
  • Battery and battery rack w/cables
  • 24-volt electric starting motor
  • 50 Amp charging alternator

  • SAE Standard Rotation
  • Paint - Caterpillar yellow with high gloss black rails & radiator
  • Flywheel and Flywheel housing-SAE No. 00
  • RH Service

3512B (60 Hz) with Upgradeable Package Optional Equipment

Air Inlet System
  • Air Cleaner: Includes installed single element Cat filter and service indicator
  • Duel element air filters
  • Single stage air cleaners

Control Panels
  • Cat connect (must choose one)
  • RTD module - may select one
  • Modbus monitoring of packages
  • First local annunicator
  • EMCP 4.3, EMCP 4.4
  • CAN 2 network equipment
  • Remote custom annunciator
  • Locale discrete I / O package
  • Vandle proof panel door

Cooling System
  • Optional radiator arrangements
  • Water level gauge
  • Coolant

Control System
  • Generator yemperature monitoring

Exhaust System
  • Exhaust Y adapters
  • Exhaust Elbows
  • Mufflers
  • Flexible fittings
  • Exhaust flange and expanders

Generators and Attachments
  • Space heater control
  • Generator conversion
  • Space heater

  • Pyrometer and thermocouples

Lube System
  • Oil level regulator
  • Prelube manual sump pump
  • Electric prelube sump pump
  • Lube oil

Special Tests / Reports
  • PGS test report @ 0.8 power factor
  • Generator test report
  • Standard generator TVA report
  • PGS test report @ 0.8 power factor
  • Custom generator TVA report
  • Torsional vibration analysis
  • PGS test report @ 1.0 power factor
  • Standard engine test charge
  • Generator test report
  • Standard engine test charge
  • PGS test report @ 1.0 power factor
  • Generator fuel consumption test

  • Barring devices

Crankcase System
  • Ventilation system
  • Protection systems

Batteries and Battery Housing
  • 24 Volt battery set - Dry
  • Battery chargers - 10, 20 and 35 amp

Power Connection System
  • EMCP voltage and current sensing groups
  • Breaker power connections
  • Center post busbar

Circuit Breaker - LV Packages
  • Right hand power connections
  • Electronically operated circuit breakers

Mounting System
  • Low efficiency isolators
  • Spring type vibration isolator
  • Spring type vibration isolator
  • Low efficiency isolators puck

Power Connections
  • Low voltage - Package mounted circuit breakers
  • Low voltage - 1400 and 1600 Frame generators
  • Electrically operated circuit breakers
  • Low voltage - Power connection options

Starting / Charging System
  • Jacket water heater wiring groups
  • 35 Amp battery charger
  • 20 Amp battery charger
  • Jacket water heaters
  • 10 Amp battery charger
  • Electric starting motors
  • Starter covers
  • Batteries, racks and cables

Starting / Charging Systems
  • Electric starting motors
  • Starter covers
  • Jacket water heater

Extended Service Coverage
  • Gold - 36,48, 60, 120 month coverage
  • Cat branded commercial power system
  • Silver - 36 ,48, 60, 120 month coverage
  • Platinum - 24, 36, 48, 60, 120 month coverage

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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