C18 (60 HZ) Tier 4 | 455-500 kW Diesel Generator

Diesel Generator Sets C18 (60 Hz) Tier 4

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Key Specs

Maximum Rating
500 ekW
500 ekW
Minimum Rating
455 ekW
455 ekW
Emissions/Fuel Strategy
U.S. EPA Tier 4 Final
U.S. EPA Tier 4 Final


455 - 500 ekW Diesel Generator Set

The C18 diesel generator sets have been developed for your mission critical, standby and prime applications. Producing reliable power from 455 to 500 ekW at 60 Hz, meeting ISO 8528-5 transient response requirements and built to accept 100 % rated load in one step. The engines are certified to the US EPA Tier 4 Final emissions levels.


Greater than 15% kW/m2

Up to 55% Footprint Reduction

Requires less space for installation

Integrated Cat® Product Link™ Control System

  • Track Genset Health and Operation Parameters
  • Genset Utilization and Performance Tracking

Product Specifications for C18 (60 Hz) Tier 4

Maximum Rating 500 ekW 500 ekW
Minimum Rating 455 ekW 455 ekW
Emissions/Fuel Strategy U.S. EPA Tier 4 Final U.S. EPA Tier 4 Final
Voltage 480 Volts 480 Volts
Frequency 60 Hz 60 Hz
Speed 1800 rpm 1800 rpm
Duty Cycle Standby, Prime Standby, Prime
Engine Model C18 ATAAC, I-6, 4-Stroke Water-Cooled Diesel C18 ATAAC, I-6, 4-Stroke Water-Cooled Diesel
Bore 1455.7 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

C18 (60 Hz) Tier 4 Standard Equipment

Air Inlet

  • Air cleaner

Exhaust System

  • Exhaust manifold - dry


  • Package mounted radiator

Fuel System

  • Fuel cooler
  • Engine fuel transfer pump
  • Primary fuel filter w/integral water separator and secondary filter
  • Fuel priming pump
  • Flexible fuel lines


  • Exhaust flange outlet


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


  • 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

Power Termination

  • Busbar

Lube System

  • Oil filter and dipstick
  • Lubricating oil
  • Oil drain lines with valve; piped to edge of base
  • Fumes disposal, piped to front of radiator
  • Oil cooler

Control Panel

  • GCCP Genset Controller


  • Rubber vibration isolators

Protection System

  • Safety shutoffs for: Higher water temperature - Overspeed - Low oil pressure

Cooling System

  • Thermostats and housing, full open temperature 92 deg C (198 deg F)
  • Coolant level sensor
  • Coolant level sight gauge
  • Fan and belt guards
  • Jacket water pump, gear driven, centrifugal
  • Coolant drain line with valve; terminated on edge of base
  • Caterpillar extended life coolant


  • 24V, 45 Amp Charging alternator
  • 24 Volt electric starting motor
  • 24 volt starting motor
  • Batteries


  • Paint - Caterpillar yellow except rails and radiators gloss black
  • Paint, Caterpillar yellow
  • Operation and maintenance manual pack and OMM storage compartment
  • Parts book
  • Vibration damper

Control System

  • Local annunciator
  • Programmable Input / Output: 2 programmable digital inputs - 2 programmable relay outputs (Form A) - 2 programmable relay outputs (Form C)
  • Suitable for use as service equipment label
  • Separation plate
  • Control panel mounting location
  • Breaker box mounting location
  • Optional external analog input
  • Remote annunciators
  • GCCP 1.2
  • Communications: Customer data link (RS485 Modbus RTu) - Serial annunciator module data link for local and remote annunciator IVR - Integrated Voltage Regulation (Digital) - EM10 Excitation Module
  • Controls include: Run/auto/ stop/control - Speed adjust - Voltage adjust - Engine cycle crank - Emergency stop pushbutton
  • Digital indication for: rpm - DC volts - operating hours - Oil pressure (psi, kPa or bar) - Coolant temperature (C or F) - Volts (L-L & L-N), frequency (Hz) - Amps (per phase & average) - Power factor (per phase & average) - kW (per phase & average) - kVA (per phase & average) - kVAr (per phase and average) - kW-hr (total) - kVAr-hr (total)
  • Programmable protective relaying functions: Generator phase sequence - Over/under voltage (27/59) - Over/under frequency (81 o/u) - Overcurrent (50/51)
  • Warning/shutdown with common LED indication of shutdowns for: Low oil pressure - high coolant temperature - Overspeed - Emergency stop - Failure to start (overcrank) - Low coolant temperature - Low coolant level
  • Control panel options: Dust proof control panel - volt free contact - Device server - Ground fault relay

Governing System

  • Cat electronic governor (ADEM A4)

Generator and Attachments

  • Segregated low voltage (AC/DC) wiring panel
  • Brushless, self-excited 2/3 pitch, random wound.
  • Insulation Class H and temperature rise
  • AREP generator
  • CIP - generators
  • IP23 Protection
  • Power center, IP22 bottom cable entry

Air Inlet System

  • Single element air filter
  • Air cleaner - Heavy duty
  • Air cleaner - Single element

Extended Service Coverage

  • Silver, Gold and Platinum coverage

Circuit breakers

  • 3 Pole 100% rated

C18 (60 Hz) Tier 4 Optional Equipment

Control System

  • Ground fault relay
  • Dust proof control panel
  • Breaker box mounting location
  • Volt free contact
  • Device server
  • Separation plate
  • Remote annunciators
  • GCCP 1.5
  • Local annunciator
  • Remote E-stop button
  • Optional external analog input
  • Control panel mounting


  • Industrial, residential, critical mufflers


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

Power Termination

  • Circuit breakers, UL listed

Generators and Attachments

  • AREP generator
  • CIP generators
  • Space heater
  • Generator mounting and duct plate

Air Inlet System

  • Single element air filter
  • Dual element air cleaner


  • Certificate of Compliance
  • IBC Certification wind load

Circuit breakers

  • Motorized single circuit breaker
  • Neutral bars
  • Power cables
  • Dual breakers first circuit breaker (CB2) LS/I package mounted
  • Current transformers
  • Package mounted single circuit breakers
  • Dual breakers first circuit breaker (CB1) LS/I package mounted
  • Auxiliary contacts

Cooling System

  • Aftertreatment guard
  • Standard radiator


  • Sound attenuated enclosures

Exhaust System

  • Flange kits
  • Exhaust flexible fittings

Fuel System

  • 660 gallon base tank

Generator Attachments

  • Permanent magnet excitation (PMG) generator

Mounting System

  • Standard base wide
  • 5 Gallon spill containment
  • Optional CB shroud
  • Overfill prevention valve
  • Locking fuel fill

Starting / Charging System

  • Battery disconnect switch
  • Jacket water heater
  • Shore power control group
  • 10 Amp dual Battery charger


  • PGS Test report @ 0.8 power factor
  • 4 Hour factory test (un-witnessed)
  • PGS Test report @ 1.0 power factor
  • Generator test report

See how C18 (60 Hz) Tier 4 compares against frequently compared products.

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