Diesel Generator Sets C27 (60 Hz)

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Key Specs

Maximum Rating
800 ekW
800 ekW
Minimum Rating
635 ekW
635 ekW
Emissions/Fuel Strategy
Low Fuel, Tier 2 Nonroad Equivalent
Low Fuel, Tier 2 Nonroad Equivalent


680 - 800 ekW Diesel Generator Set

The C27 diesel generator sets have been developed for your mission critical, standby and prime applications. Producing reliable power from 635 to 800 ekW at 60 Hz, each generator set has been designed to meet ISO 8528-5 transient response requirements and to take on 100 percent rated load in one step. The C27 is certified as a low fuel consumption system as well as having a certificate for EPA Stationary Emergency (Tier 2).


Field population 250,000 in service

Proven performance in heavy-duty applications

Integrated Cat Control system

Designed to match engine and alternator performance

Accepts 100% Block load in 1 step

Can handle large loads without affecting operations

Product Specifications for C27 (60 Hz)

Maximum Rating 800 ekW 800 ekW
Minimum Rating 635 ekW 635 ekW
Emissions/Fuel Strategy Low Fuel, Tier 2 Nonroad Equivalent Low Fuel, Tier 2 Nonroad Equivalent
Voltage 208 to 600 Volts 208 to 600 Volts
Frequency 60 Hz 60 Hz
Speed 1800 rpm 1800 rpm
Duty Cycle Standby, Prime Standby, Prime
Engine Model C27 ATAAC, V-12, 4-Stroke, Water-Cooled Diesel C27 ATAAC, V-12, 4-Stroke, Water-Cooled Diesel
Bore 5.4 in 137.2 mm
Stroke 6 in 152.4 mm
Displacement 1649.47 in³ 27.03 l
Compression Ratio 16.1:1 16.1:1
Aspiration TA TA
Fuel System MEUI MEUI
Governor Type Adem™A4 Adem™A4
Length - Maximum 184 in 4674 mm
Width - Maximum 67.8 in 1723 mm
Height - Maximum 85.1 in 2162 mm

C27 (60 Hz) Standard Equipment

Air Inlet

  • Air Cleaner; single element canister type with service indicator

Control Panel

  • EMCP 4.2B
  • Digital Indicators
  • Warning/shutdown Indicators
  • Programmable Protective Relaying Functions
  • Communications
  • Features:

Cooling System

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

Exhaust System

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

Fuel System

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

Generators and Attachments

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

Lube System

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

Mounting System

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

Starting and Charging System

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


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

C27 (60 Hz) Optional Equipment

Air Inlet System

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

Starting / Charging System

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

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

  • Cable shroud - Bottom mounted
  • Cable shroud - Top mounted
  • EMCP 4.3, EMCP4.4
  • Side extension box
  • Remote annunciator modules
  • Auxiliary box options
  • Remote mounted panel harness mounting kit
  • Remote mounted circuit breaker terminals
  • Modbus monitor local packages
  • Remote DIO module
  • Cat connect telematics
  • Load share module
  • Vandal proof panel cover
  • Installed DIO module
  • Remote mounting harness
  • Annunciator modules

Cooling System

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


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

Exhaust System

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

Generator and Attachments

  • 60 Hz standard generators
  • 60 Hz premium generators

Lube System

  • Prelube pumps
  • Oil level regulator

Mounting System

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

Power Connections

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

Special Tests / Reports

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


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

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