C27 (60 Hz)

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Producing reliable power from 635 ekW to 800 ekW at 60 Hz, our C27 diesel generator sets are made for your mission critical, standby and prime applications. And we've engineered each to ISO 8528-5 transient response requirements and to take on 100 percent rated load in one step.C27 generator sets are available from low fuel consumption systems to EPA Tier 4 Interim certification. Seismic certification is also available for select models, so your generator sets are equipped for unexpected disturbances. Our integrated control system, including ATS and switchgear, ensures a consistent power supply and connection to your fleet through on-site and remote monitoring options. Our EMCP 4 control panel features a user-friendly interface and puts your management and diagnostics tools in one location. The EMCP 4.4 controller provides multi generator set paralleling capability, allowing you to use multiple generator sets for increased power output and improved reliability. We offer a broad range of accessories and bolt-on system expansion attachments to meet your power needs. Find flexible packaging options to work with your spatial restrictions and environmental conditions. Build in additional safety features with UL 2200 and CSA certified package options.

Generator Set Specifications

  • Minimum Rating 680 ekW 680 ekW
  • Maximum Rating 800 ekW 800 ekW
  • Voltage 208 to 600 208 to 600
  • Frequency 60 Hz 60 Hz
  • Speed 1800 RPM 1800 RPM

Generator Set Configurations

  • Emissions/Fuel Strategy Low Fuel Consumption, U.S. EPA Certified for Stationary Emergency Use Only (Tier 2 Nonroad Equivalent Emission Standards) Low Fuel Consumption, U.S. EPA Certified for Stationary Emergency Use Only (Tier 2 Nonroad Equivalent Emission Standards)

Engine Specifications

  • Engine Model C27 ATAAC, V-12, 4-Stroke, Water-Cooled Diesel C27 ATAAC, V-12, 4-Stroke, Water-Cooled Diesel
  • Compression Ratio 16.5:1 16.5:1
  • Aspiration TA TA
  • Governor Type Adem™A4 Adem™A4
  • Fuel System MEUI MEUI
  • Bore 5.4 in 137.2 mm
  • Displacement 1649.47 in³ 27.03 l
  • Stroke 6.0 in 152.4 mm

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
  • UL 2200 / CSA - Optional

  • UL 2200 listed packages
  • CSA Certified
  • Certain restrictions may apply.
  • Consult with your Cat® Dealer.
  • C27 (60 Hz) Standard Equipment

    Air Inlet

    • Air Cleaner; single element canister type with service indicator

    Control Panel

    • EMCP 4 / EMCP 4.2B Genset Controllers
    • EMCP 4.2B Control Features
    • Digital Indicators
    • Warning/shutdown Indicators
    • Programmable Protective Relaying Functions
    • Communications


    • ATAAC
    • Radiator sized to 50 degrees C
    • Coolant drain line with valve terminated on edge of base
    • Fan and belt guards drive
    • Coolant level sensor
    • Caterpillar Extended Life Coolant


    • Exhaust Manifold - dry
    • 203mm (8in) ID round flanged outlet


    • Primary fuel filter with integral water separator
    • Secondary fuel filter
    • Fuel cooler
    • Flexible fuel lines - installed
    • Electric fuel priming pump

    Generators and Attachments

    • SR5 Permanent Magnet (PM)
    • For EPA Stationary Emergency (EPA Tier 2 Emissions) configurations02/11/2017:
    • For Low BSFC configurations:
    • Integrated Voltage Regulator (IVR) includes
    • Bus bar connections:

    Lube System

    • Lubricating oil
    • Standard volume oil pan - 68 Ltr
    • Gear type lube oil pump
    • Integral lube oil cooler
    • Oil filter, filler and dipstick
    • Oil drain lines and valve
    • Fumes disposal - open crankcase ventilation routed to front of package

    Mounting System

    • Rails - engine/generator/radiator mounting
    • Rubber anti-vibration mounts - shipped loose

    Starting and Charging System

    • 24-volt electric starting motor
    • Charging Alternator 45A
    • Battery, rack and cables - shipped-loose
    • Battery disconnect switch


    • Paint: Caterpillar Yellow with high gloss black rails & radiator
    • RH Service
    • Flywheel and flywheel housing-SAE No. 0 and SAE No. 18
    • SAE Standard Rotation

    C27 (60 Hz) Optional Equipment

    Air Inlet System

    • Standard air cleaners
    • Dual element air cleaners
    • Heavy duty air cleaners

    Starting / Charging System

    • 10 Amp battery chargers
    • 20 Amp enclosure battery chargers
    • 24 Volt battery sets - Dry
    • 24 Volt electric start motors - Heavy duty
    • Jacket water heaters
    • Air starting motor with control and silencer
    • Space heater

    Circuit Breakers

    • 400, 800, 1200, 1600, 2000, 2500, 3000 Amp, 3 pole, UL-100% rated circuit breakers
    • 2000 Amp, 3 pole, IEC rated circuit breakers
    • 800 Amp, 4 pole, IEC rated circuit breakers

    Control Panels

    • EMCP (4.2B) (4.3) (4.4)
    • Remote mounting harness
    • Remote mounted circuit breaker terminals
    • Remote mounted panel harness mounting kit
    • Auxiliary box options
    • Side extension box
    • Cable shroud - Top mounted
    • Cable shroud - Bottom mounted
    • Cat connect telematics
    • Installed DIO module
    • Remote DIO module
    • Annunciator modules
    • Remote annunciator modules
    • Modbus monitor local packages
    • Load share module
    • Vandal proof panel cover

    Cooling System

    • Standard radiator
    • High ambient radiator
    • Certified radiator
    • Extended life coolant
    • Radiator duct flange


    • Special sound attenuated enclosure
    • Enclosure with lifting base or fuel tank
    • Enclosure fuel tank options
    • Enclosure louvers
    • Cold weather bundle
    • Enclosure lighting
    • AC distribution panel, lights and outlet
    • Panel bracket
    • Enclosure colors

    Exhaust System

    • Flanges
    • Guard and shield system
    • Elbows
    • Flexible fittings
    • Mufflers
    • Exhaust through the wall kit

    Generator and Attachments

    • 60 Hz standard generators
    • 60 Hz premium generators

    Lube System

    • Oil level regulator
    • Prelube pumps

    Mounting System

    • Puck style low efficiency isolators
    • Spring type vibration isolators
    • IBC vibration isolators
    • Mounting base type

    Power Connections

    • Neutral grounding connection
    • Center post busbar
    • Power connections - Right / Left / Rear
    • Cable entry - Right / Left / Rear

    Special Tests / Reports

    • IBC Seismic certifications
    • OSHPD Seismic certifications
    • Special CSA test cerification
    • PGS test report @ 1.0 power factor
    • PGS test report @ 0.8 power factor
    • Generator test report
    • Standard engine test
    • Torsional vibration analysis report


    • Special paint
    • US aid emblem
    • SGS Inspection
    • Miscellaneous inspection

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