C18 Power Density (60 Hz)

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Producing reliable power from 455 ekW to 600 ekW at 60 Hz, our C18 diesel generator sets are made to meet your standby and prime applications. The engines are certified to the US EPA Tier 4 Final emissions levels. Each is designed to meet ISO 8528-5 transient response requirements and built to accept 100 percent rated load in one step. Seismic certification is also available for these models, so you can deliver power despite disturbances. Our integrated control system, including ATS and switchgear ensure a consistent power supply and connection to your fleet through on-site and remote monitoring options. We offer a wide range of EMCP 4 control panel options, with a simple screen display, consolidating all your management and diagnostics tools. The EMCP 4.4 controller provides on package paralleling capability, allowing you to use multiple generator sets to power your facility, providing added capacity and redundancy. We've made our generator sets adaptable to your demands with a broad range of accessories and bolt-on system expansion attachments. Find flexible packaging to fit your spatial restrictions and environmental conditions. Even choose UL 2200 and CSA certified package options for added safety.

Generator Set Specifications

  • Minimum Rating 455 ekW 455 ekW
  • Maximum Rating 500 ekW 500 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

Engine Specifications

  • Engine Model C18 ATAAC, I-6, 4-Stroke Water-Cooled Diesel C18 ATAAC, I-6, 4-Stroke Water-Cooled Diesel
  • Compression Ratio 14.5:1 14.5:1
  • Aspiration Air to Air Aftercooled Air to Air Aftercooled
  • Governor Type Adem™A4 Adem™A4
  • Fuel System Electronic unit injection Electronic unit injection

Design Criteria

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Cat Diesel Engine

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Cat Diesel Tier 4 Final Certified Engine

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EMCP Control Panel

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Single-Source Supplier

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World Wide Product Support

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Seismic Certification

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Cat Clean Emissions Module (CEM)

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UL 2200 / CSA - Optional

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C18 Power Density (60 Hz) Standard Equipment

Exhaust System

  • Exhaust manifold; dry

Fuel System

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

Generator and Attachments

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

Lube System

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

Protection System

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

Cooling System

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


  • 24-volt electric starting motor
  • 24V, 45 amp charging alternator.


  • Operation and maintenance manual pack and OMM Storage Compartment
  • Paint, Caterpillar yellow
  • Parts book
  • Vibration damper

Control System

  • Programmable protective relaying functions: Generator phase sequence - Over / Under voltage (27/59) - Over / Under frequency (81 o/u) - Overcurrent (50/51)
  • Suitable for use as service equipment label
  • 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)
  • EMCP 4.2
  • Control panel options: Dust proof control panel - volt free contact - Device server - Ground fault relay
  • Controls include: Run / auto / stop control - Speed adjust - Voltage adjust - Engine cycle crank - Emergency stop pushbutton
  • 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
  • Programmable Input / Output: 2 programmable digital inputs - 2 programmable relay outputs (Form A) - 2 programmable relay outputs (Form C)
  • Warning / Shutdowns 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
  • Breaker box mounting location
  • Remote annunciators
  • Control panel mounting location
  • Separation plate
  • Optional external analog input
  • Local annunciator

Governing System

  • Cat Electronic Governor (ADEM A4)

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 Power Density (60 Hz) Optional Equipment

Control System

  • Volt free contact
  • Ground fault relay
  • Separation plate
  • Dust proof control panel
  • Device server
  • Optional external analog input
  • Remote E-stop button
  • Local annunciator
  • Breaker box mounting location
  • Remote annunciators
  • EMCP 4.4
  • Control panel mounting

Generators and Attachments

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

Air Inlet System

  • Single element air filter
  • Dual element air cleaner


  • IBC certification wind load
  • Certificate of compliance

Circuit breakers

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

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 generator

Mounting System

  • 5 gallon spill containment
  • Standard base Wide
  • Overfill prevention valve
  • Optional CB shroud
  • Locking fuel fill

Starting / Charging System

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


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

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