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C18 Generator Set

Minimum Rating

550 kVA

550 kVA

Maximum Rating

715 kVA

715 kVA

Emissions/Fuel Strategy

Low Fuel, EU Stage IIIA

Low Fuel, EU Stage IIIA


The C18 diesel generator sets developed for critical, standby and prime applications. Producing reliable power from 550 to 715 kVA at 50 Hz, meeting ISO 8528-5 transient response requirements and built to accept 100 percent rated load in one step. Certified for low fuel consumption, EU Stage IIIA Nonroad Emission Standards, China Nonroad III Emission Standards Emissions / Fuel Strategy.



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Spec Value
Minimum Rating 550 kVA 550 kVA
Maximum Rating 715 kVA 715 kVA
Emissions/Fuel Strategy Low Fuel, EU Stage IIIA Low Fuel, EU Stage IIIA
Voltage 380 to 415 Volts 380 to 415 Volts
Frequency 50 Hz 50 Hz
Speed 1500 rpm 1500 rpm
Duty Cycle Standby, Prime Standby, Prime
Spec Value
Engine Model C18 ATAAC, I-6, 4-Stroke Water-Cooled Diesel C18 ATAAC, I-6, 4-Stroke Water-Cooled Diesel
Bore 5.71 in 145 mm
Stroke 7.2 in 183 mm
Displacement 1106.4 in³ 18.1 l
Compression Ratio 14.5:1 14.5:1
Aspiration Air to Air Aftercooled Air to Air Aftercooled
Fuel System Electronic unit injection Electronic unit injection
Governor Type Adem™A4 Adem™A4
Spec Value
Length – Minimum 218.5 in 5550 mm
Length – Maximum 218.5 in 5550 mm
Width – Maximum 80.9 in 2056 mm
Height – Maximum 107.8 in 2737 mm

Standard Equipment

Air System

  • Air Cleaner, light duty
  • Turborcharger

Air Inlet

  • Air Cleaner

Control Panel

  • EMCP 4.2
  • EMCP 4 Genset Controller


  • Package mounted radiator

Cooling System

  • Coolant drain line with valve
  • Fan drive, battery charging alternator drive
  • Radiator and cooling fan with guard
  • Caterpillar Extended Life Coolant


  • Exhaust flange outlet

Exhaust System

  • Stainless steel exhaust flex, gaskets, raincap and SAE exhaust flange for customer use; shipped loose

Fuel System

  • Standard open set fuel tank / base supplied Base, formed steel with single wall integral 8-hour fuel tank


  • Fuel priming pump
  • Secondary fuel filter
  • Primary fuel filter with integral water separator


  • Matched to the performance and output characteristics of Cat engines
  • IP23 Protection
  • Load adjustment module provides engine relief upon load impact and improves load acceptance and recovery time

Generator and Attachments

  • Segregated low voltage (AC / DC) wiring panel
  • Power center, IP22
  • Optional LC frame generator – IP23 Protection,
  • Mandatory Option Rear circuit breaker, IEC, 3 pole, mounted in power center
  • Integrated Voltage Regulator
  • A frame generator – IP21 Protection

Governing System

  • Cat Electronic Governor (ADEM A4)

Power Termination

  • Bus Bar

Lube System

  • Oil drain valves
  • Lubricating oil

Mounting System

  • Captive linear vibration isolators between base and engine-generator includes lifting provisions and termination points for coolant and lube oil drain lines

Starting / Charging

  • 24 Volt battery with rack and cables


  • 24 volt starting motor
  • Batteries


  • Rubber vibration isolators


  • Engine and alternator pre-paint, Caterpillar Yellow
  • Paint – Caterpillar Yellow except rails and radiators gloss black

Optional Equipment


  • Global
  • European Certifications – EU certificate of conformance


  • Industrial, Residential, Critical Mufflers

Air Inlet System

  • Dual element air cleaner
  • Single element air cleaner


  • Oversize and premium generators
  • Excitation: [ ] Permanent Magnet Excited (PM) [ ] Internally Excited (IE)
  • Anti-condensation heater

Power Termination

  • Circuit breakers, IEC compliant
  • Circuit breakers, UL listed

Circuit Breakers

  • 4 Pole (IEC-100% rated) – package mounted
  • 3 Pole (IEC-100% rated) – package mounted
  • Pad-lockable device
  • 4 Pole (IEC-100% rated) – motorized
  • Power terminal strips
  • 3 Pole (IEC-100% rated) – motorized

Control Panel

  • EMCP 4.4

Control Panels

  • Local & remote annunciator modules
  • Digital I/O module
  • Load share module
  • EMCP (4.2) (4.3) (4.4)
  • Remote monitoring software

Control System

  • Local alarm modules
  • Control panel protective devices
  • Remote annunciator modules
  • Volt free contacts

Cooling System

  • Radiator duct flange


  • Sound attenuated enclosures


  • Heavy-duty starting system
  • Battery chargers
  • Charging alternator
  • Oversize batteries
  • Jacket water heater

Exhaust System

  • Elbow Kit
  • Mufflers, End in / End out
  • Manifold and turbocharger guard
  • Engine mounted muffler
  • Flange groups; 8 and 10 inch weld flanges and gaskets

Fuel System

  • Integral -Duel wall fuel tank bases
  • Manual fuel transfer system
  • Fuel transfer system


  • Integral & sub-base UL listed dual wall fuel tanks
  • UL 2200 package
  • Narrow, Wide or Skid Base
  • Enclosures: sound attenuated, weather protective
  • Sound attenuated, weather protective or high ambient weather protective enclosure
  • EEC Declaration of Conformity
  • Seismic Certification per applicable building codes: IBC 2000, IBC 2003, IBC 2006, IBC 2009, CBC 2007
  • The following options are based on regional and product configuration:
  • Single or dual wall sub-base fuel tanks
  • Automatic transfer switches (ATS)
  • CSA Certification
  • EU Certificate of Conformance (CE)
  • Single or dual wall integral fuel tanks

Generator and Attachments

  • A frame CIP generator
  • LC frame generator
  • Permanent magnet excitation
  • LC frame oversize generator
  • Space heaters
  • Ingress protection
  • LC frame CIP generator
  • A frame oversize generator

Lube System

  • Manual sump pump

Mounting System

  • Narrow skid base

Starting / Charging System

  • 5 Amp battery charger
  • Jacket water heater
  • Battery disconnect switch

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