New | 3512B Diesel Generator Set

The 3512B generator set has been developed for a wide range of applications, from emergency standby installations such as healthcare and datacenters to continuously powering remote installations. The packages can be optimized for performance that matters to you with either low emissions or low fuel consumption versions available. Backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty, Cat generator sets will provide the reliability and durability you expect.

Generator Set Specifications
Minimum Rating1320 kVA
Maximum Rating1750 kVA
Voltage400 to 415 Volts
Frequency50 Hz
Speed1500 rpm
Duty CycleContinuous, Prime, Standby, Mission Critical
Generator Set Configurations
Emissions/Fuel StrategyLow Fuel Consumption, Low Emissions
Engine Specifications
Engine Model3512B TA, V-12, 4-Stroke Water-Cooled Diesel
Displacement - Std3161.03 in³
Displacement - HD3573.55 in³
Fuel SystemElectronic Unit Injection
Governor TypeADEM™A3
Compression Ratio14.0:1 Std 15.5:1 HD
Bore6.69 in
Stroke - Standard7.48 in
Stroke - HD8.46 in
Air InletSingle element canister style with service indicator
Exhaust Flange Size203.2 mm (8.0 in)
Generator Set Dimensions
Length - Maximum218.8 in
Width - Maximum90 in
Height - Maximum93.2 in

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

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.

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.

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.

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.

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

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






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With only a few days notice, we were able to get the emergency system working properly. Hawthorne Cat provided great leadership and excellent field support.
Mark Cripe
Helix Electric

San Diego - Power
Ed Dawe
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Mark Reza
Used Engine Sales Manager
858.376.6840 office
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Phillip J. Smith (PJ)
Field Service Manager
858.376.6874 office
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Paul Karpf
Rental and Load Bank
General Manager
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Power Systems Rental &
Sales Representative
671.649.4241 office
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