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3512A with Upgradeable Package

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Cat Generator Set Package

Cat generator set packages have been fully prototype tested, and certified torsional vibration analysis reports are available. The packages are designed to accept 100% load in one step, meet the NFPA 110 requirement for loading, and conform to the ISO 8528-5 steady state and transient response requirements

Cat Diesel Engines

The four cycle Cat diesel engine combines consistent performance with excellent fuel economy and transient response that meets or exceeds ISO 8528-5. The engines have been designed and built for a wide range of applications and can be optimized for low fuel consumption or low emissions. The engines feature a reliable, rugged, and durable design that has been field proven in thousands of applications worldwide from emergency standby installations to continuously operating power plants.


The generators used on Cat packages have been designed and tested to work with the Cat engine. The generators are built with robust Class H insulation and provide industry leading motor starting capability. Random wound generators provide good generator performance in a majority of applications and form wound is available for harsh mechanical and electrical environments.

EMCP Control Panels

The EMCP controller features the reliability and durability you have come to expect from your Cat equipment. The EMCP 4 is a scalable control platform designed to ensure reliable generator set operation, providing extensive information about power output and engine operation. EMCP 4 systems can be further customized to meet your needs through programming and expansion modules.

Cooling System

The cooling system has been designed to operate in standard ambient temperatures up to 50°C (122°F), with optional high ambient radiators available. The factory installed cooling system has been designed and tested to ensure proper generator set cooling, and includes the radiator, fan, belts, and all guarding installed as standard. Contact your Cat Dealer for specific ambient and altitude capabilities.

World Wide Product Support

Cat Dealers have over 1,800 dealer branch stores operating in 200 countries, providing extensive pre-sale and post-sale support, from 98% parts availability within 24 hours to an individualized customer support agreement (CSA), the Cat dealer will provide support.

Engine Specifications
Bore 170 mm (6.69 in)
Displacement 51.8 L (3161.03 in3)
Generator Set Specifications
Minimum Rating 890 eKW
Maximum Rating 1250 eKW
Voltage 220 to 13800
Frequency 60 Hz
Speed 1800 rpm
Generator Set Configurations
Emissions/Fuel Strategy Optimized for Low Fuel Consumption
Engine Specifications
Engine Model 3512A, V-12, 4-Stroke Water-Cooled Diesel
Displacement 51.8 l (3161.03 inu00b3)
Fuel System MUI
Aspiration TA
Governor Type Woodward
Compression Ratio 13.5:1
Bore 170 mm (6.69 in)
Stroke 190 mm (7.48 in)
Air Inlet Single element canister style with service indicator
Exhaust Flange Size - Internal Diameter 203.2 mm (8.0 in)
Generator Set Dimensions
Length - Maximum 5169 mm (203.5 in)
Width - Maximum 2015 mm (79.3 in)
Height - Maximum 2336 mm (92 in)
Dry Weight - Genset (minimum) 10024 kg (22099 lb)
Dry Weight - Genset (maximum) 10224 kg (22540 lb)

Standard Equipment

  • Air Inlet System
    • Air cleaner; single element canister type with service indicator
  • Control Panel
    • EMCP 4.2
    • Emergency stop pushbutton
    • 24-volt DC operation
    • Environmental sealed front face
    • Text alarm / event descriptions
    • Generator mounted – rear facing
    • Generator set packages include Caterpillar’s Voltage Regulator (IVR).
    • IVR includes reactive droop capability, 3-phase voltage sensing
    • KVAR/PF modes, RFI suppression, min/max exciter
    • Limiter and exciter diode monitor
    • Controls:
    • Speed adjust
    • 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
    • Fan and belt guards.
    • Coolant drain line with valve
    • Coolant level sensors. (Not included with packages without radiator)
    • Caterpillar extended life coolant. (Not included with packages without radiator, installed SF44CTS, shipped loose radiators or heat exchangers)
  • Exhaust
    • Dry Exhaust Manifold
    • Flanged faced 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
    • LV:
    • Random wound
    • Internal excitation or permanent magnet
    • 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
    • 60 Hz models: NEMA standard hole pattern
  • 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 loose)
  • Starting / Charging System
    • 24-volt electric starting motor
    • 50 Amp charging alternator
    • Battery and battery rack w/cables
    • Battery disconnect switch
  • General
    • Paint – Caterpillar yellow with high gloss black rails & radiator
    • RH Service
    • Flywheel and Flywheel housing-SAE No. 00
    • SAE Standard Rotation

Optional Equipment

  • Air Inlet System
    • Single stage air cleaners
    • Dual element air filters
  • Control Panels
    • EMCP 4.2B, EMCP 4.3, EMCP 4.4
    • Vandle proof panel door
    • Modbus monitoring of packages
    • First local annunciator
    • Remote custom annunicator
    • CAN2 Network equipment
    • Cat connect
    • Local discrete I/O package
    • Load share module options
  • Cooling System
    • Optional radiator arrangements
    • Water level gauge
    • Coolant
  • Exhaust System
    • Industrial grade (15 db) mufflers
    • Exhaust Y adapters
    • Exhaust flexible fitting
    • Exhaust elbows
  • Generators and Attachments
    • Space heater
    • Space heater control
    • Generator conversion
  • Lube System
    • Lube oil
    • Prelube sump pump
    • Oil level regulator
    • Primary fuel systems
  • Special Tests / Reports
    • Generator test report
    • Standard genset TVA report
    • Genset tors vibration analysis
    • Standard engine test charge
    • PKG factory test report
    • PGS test report @ 1.0 power factor
    • Fuel consumption test
  • Crankcase System
    • Ventilation system
    • Protection systems
  • Batteries and Battery Housing
    • 24 Volt battery set – Dry
    • Battery chargers – 10, 20 and 35 amp
  • Mounting System
    • Puck style low efficiency lsolators
    • Spring type vibration isolator

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