3512B (50 Hz) with Upgradeable Package

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The 3512B diesel generator sets have been developed to meet your mission critical, continuous, standby and prime applications. Producing reliable power from 1320 to 1750 kVA at 50 Hz, each generator set is designed to meet ISO 8528-5 transient response requirements and accept 100 percent rated load in one step. Our 3512B generator sets are designed for either low fuel consumption or low emissions and with our integrated control system, including ATS and switchgear keeps power supply consistent and keeps you connected to your fleet with on-site and remote monitoring options. Get management and diagnostics tools in one, with our EMCP4 control panel options, all designed with a user-friendly interface. It's not just quality that matters but customization, choose from a broad range of accessories and bolt-on system expansion attachments. Discover our upgradeable packaging options to work with your spatial restrictions and environmental conditions. Our 3512B generator sets are developed for such prerequisites, so that you can meet your specific power needs.

Generator Set Specifications

Minimum Rating 1320 kVA 1320 kVA Less
Maximum Rating 1750 kVA 1750 kVA Less
Emissions/Fuel Strategy Low Fuel Consumption, Low Emissions Low Fuel Consumption, Low Emissions Less
Voltage 400 to 415 Volts 400 to 415 Volts Less
Frequency 50 Hz 50 Hz Less
Speed 1500 rpm 1500 rpm Less
Duty Cycle Continuous, Prime, Standby, Mission Critical Continuous, Prime, Standby, Mission Critical Less
Length - Maximum 218.8 in 5556.0 mm Less
Width - Maximum 90.0 in 2286.0 mm Less
Height - Maximum 93.2 in 2336.0 mm Less

Engine Specifications

Engine Model 3512B TA, V-12, 4-Stroke Water-Cooled Diesel 3512B TA, V-12, 4-Stroke Water-Cooled Diesel Less
Displacement - Std 3161.03 in³ 51.8 l Less
Displacement - HD 3573.55 in³ 58.56 l Less
Fuel System Electronic Unit Injection Electronic Unit Injection Less
Aspiration TA TA Less
Governor Type ADEM™A3 ADEM™A3 Less
Compression Ratio 14.0:1 Std 15.5:1 HD 14.0:1 Std 15.5:1 HD Less
Bore 6.69 in 170.0 mm Less
Stroke - Standard 7.48 in 190.0 mm Less
Stroke - HD 8.46 in 215.0 mm Less
Air Inlet Single element canister style with service indicator Single element canister style with service indicator Less
Exhaust Flange Size 203.2 mm (8.0 in) 203.2 mm (8.0 in) Less

3512B (50 Hz) with Upgradeable Package Standard Equipment

Control System
  • EMCP 4.2
  • Emergency stop pushbutton
  • 24 Volt DC operation
  • 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
  • Coolant temperature
  • Volts (L-L & L-N)
  • frequency (Hz)
  • Amps (per phase & average)
  • Warnings / Shutdown indicators
  • Low oil pressure
  • High coolant temperature
  • Overspeed
  • Failure to start (overcrank)
  • Low coolant level
  • Communications
  • 4 Programmable digital inputs
  • 4 Programmable digital outputs

Cooling System
  • SCAC
  • 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
  • Flanged faced outlet(s)

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

Generator System
  • 3 Phase brushless, salient pole
  • 6 Leads
  • Caterpillar's Digital Voltage Regulator (CDVR)
  • 3 Phase voltage sensing
  • RFI suppression
  • Min / max exciter
  • Random wound
  • Internal Excitation
  • Winding temperature detectors
  • NEMA Class H insulation
  • Class H temperature rise at 40C ambient
  • Bus bar connections

Governing System

  • English

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

  • Caterpillar yellow with high gloss black rails & radiator
  • RH service
  • Flywheel and flywheel housing-SAE
  • SAE standard rotation

3512B (50 Hz) with Upgradeable Package Optional Equipment

Air Inlet System
  • Single element filter
  • Dual element air cleaner
  • Heavy duty air cleaner

Control System
  • EMCP 4.3, EMCP 4.4
  • Governors (MUI-low voltage)
  • Load share module options (LV)
  • EMCP voltage and current sensing groups
  • Annunciator modules (Local and remote)
  • Local annunciator modules (Low voltage)
  • Remote annunciator modules (Low voltage)
  • Annunciator network equipment
  • Cat Connect: Ethernet telematics / Satellite telematics / Cell telematics
  • Customer interface options
  • Generator yemperature monitoring
  • CAN2 network equipment
  • Neutral to ground connection

Cooling System
  • Installed radiators
  • Cooling system attachments
  • Water level switch gauges
  • Coolant

Exhaust System
  • Elbows
  • Flange and exhaust expanders
  • Flexible fittings
  • Y Adapters
  • Mufflers

Factory Support
  • Factory commissioning

Fuel System
  • Primary fuel filter
  • Secondary fuel filters

Generators and Attachments
  • Low voltage generators 380, 400, 415 Volts 3 Phase, 1500 rpm
  • 6 Leads
  • Pitch 0.6667
  • 1400 and 1600 Frame
  • Permanent magnet
  • Internally excitation
  • RW
  • Space heater kit
  • Generator conversion kits - PM to IE / IE to PM

  • Pyrometer and thermocouples

Lube System
  • Standard sump oil pan
  • Lube oil in standard sump
  • Drain GP oil pan
  • Lube oil filters
  • Oil level regulator
  • Prelube pump groups

Crankcase System
  • Crankcase protection group
  • Crankcase ventilation system

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

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

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

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

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

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 Engine

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.

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.

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 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.

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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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Application Center

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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