3512C (60 Hz)

3512C Generator Set

Producing reliable power from 1230 to 1500 ekW at 60 Hz, our 3512C 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% rated load in one step. Generator sets are U.S. EPA Certified for Stationary Emergency Use Only (Tier 2 Nonroad Equivalent Emission Standards)

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

Cat ECS 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


  • UL 2200 Listed
  • CSA
  • IBC seismic certification
  • OSHPD pre-approval

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

Worldwide 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

Standard Equipment

Air Inlet System
  • Air cleaner; single element canister type with service indicator
Air Inlet
  • Air cleaner
  • Package mounted radiator
  • Exhaust flange outlet
  • Secondary fuel filters
  • Primary fuel filter with integral water separator
  • Fuel priming pump
  • Matched to the performance and output characteristics of Cat engines
  • IP23 Protection
Power Termination
  • Busbar
Control Panel
  • Cat ECS Genset controller
Control System
  • Alarm acknowledge
  • Over/under frequency (81 o/u)
  • Reverse power (kW) (32)
  • Coolant temperature
  • kVAr (per phase, average & percent)
  • Overcurrent (50 / 51)
  • High coolant temperature
  • Environmental sealed front face
  • Reverse reactive power (kVAr) (32RV)
  • kVA (per phase, average & percent)
  • Volts (L-L & L-N)
  • 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
  • kW-hr (total)
  • kW (per phase, average & percent)
  • Low oil pressure
  • Cat ECS 100
  • Digital indication for:
  • Engine cool-down timer
  • Generator mounted - rear facing
  • DC volts
  • 1 programmable relay outputs (Form C)
  • Overspeed
  • kVAr-hr (total)
  • 1 programmable digital outputs
  • Communications
  • Power factor (per phase & average)
  • Oil pressure (psi, kPa or bar)
  • True RMS AC metering, 3-phase, +/-2% accuracy
  • Cat connect
  • Customizable screens
  • Low coolant temperature
  • Over/under voltage (27 / 59)
  • 4 programmable relay outputs (Form A)
  • Accessory module data link
  • Warning/shutdown with common LED indication of shutdowns for:
  • Failure to start (overcrank)
  • Amps (per phase & average)
  • Auto/start/stop control
  • Controls:
  • Engine cycle crank
  • Customer data link (Modbus RTU)
  • Programmable protective relaying functions:
  • Text alarm/event descriptions
  • Emergency stop
  • Speed adjust
  • Number of I/O varies on options selected
  • Lamp test
  • RPM
  • 24 Volt DC operation
  • Emergency stop pushbutton
  • Low coolant level
  • Frequency (Hz)
  • Generator phase sequence
  • Load histogram feature
  • PLC functionality
Cooling System
  • Coolant level sensors (Not included with packages without radiator)
  • SCAC
  • Radiator fan and fan drive
  • Coolant drain line with valve
  • Fan and belt guards
  • Caterpillar extended life coolant (Not included with packages without radiator, installed SF44CTS
Exhaust System
  • Flanged faced outlet(s)
  • Dry exhaust manifold
Fuel System
  • Fuel cooler; not included with packages without radiator
  • Secondary fuel filters
  • Flexible fuel lines - shipped loose
  • Fuel priming pump
Generators and Attachments
  • Medium voltage:
  • Internal excitation (IE)
  • High voltage
  • Permanent magnet excitation (PMG)
  • Winding temperature detectors
  • NEMA Class H insulation system, Class H temperature rise at 40C ambient
    (125C prime/150C standby)
  • Busbar connections, right side extension box, bottom cable entry
  • Busbar connections, top center mounted, top cable entry
  • Low voltage:
  • Class H insulation, Class F temperature rise at 40C ambient
    (105C prime/130C standby)
  • NEMA Class H insulation system, Class H temperature rise at 40C ambient
    (125C prime / 150C standby)
  • NEMA standard hole pattern
  • 3 phase brushless, Salient pole
  • NEMA standard hole pattern
  • 6 Leads
  • Random wound
  • NEMA standard hole pattern
  • Form wound
Governing System
  • Parts book
Lube System
  • Gear type lube oil pump
  • Oil filter, filler and dipstick
  • Fumes disposal
  • Lubricating oil
  • Oil drain lines and valve
  • Integral lube Oil cooler
Mounting System
  • Rubber anti-vibration mounts - shipped loose
Starting / Charging System
  • 45 Amp Charging alternator
  • Battery and battery rack w/cables
  • Battery disconnect switch
  • 24 Volt electric starting motor
  • Flywheel and Flywheel housing-SAE No. 00
  • SAE standard rotation
  • Right hand servicing
  • Paint - Caterpillar yellow with high gloss black rails & radiator
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