D300 GC C9 (60 Hz) | 300 kW Diesel Generator

Diesel Generator Sets D300 GC

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Key Specs

Maximum Rating
300 ekW
300 ekW
Minimum Rating
300 ekW
300 ekW
Emissions/Fuel Strategy
EPA Stationary Emergency
EPA Stationary Emergency


300 ekW Diesel Generator Set

Producing reliable power of 300 ekW at 60 Hz, our D300 GC diesel generator set are designed to ISO 8528-5 transient response requirements. The D300 GC generator sets are engineered to EPA Stationary Emergency (Tier 3) emissions standards.


Saves up to 31% Installed Space

Requires less space for installation; leaves more room for your on-going operations

Weighs up to 26% Less

Easier handling; less structural reinforcement required to support genset weight

Standard 105°C Alternator Temperature Rise

Meets most all specifications; ensures long alternator life

Product Specifications for D300 GC

Maximum Rating 300 ekW 300 ekW
Minimum Rating 300 ekW 300 ekW
Emissions/Fuel Strategy EPA Stationary Emergency EPA Stationary Emergency
Voltage 208 to 600 Volts 208 to 600 Volts
Frequency 60 Hz 60 Hz
Speed 1800 rpm 1800 rpm
Duty Cycle Standby Standby
Engine Model Cat® C9 In-line 6, 4-cycle diesel Cat® C9 In-line 6, 4-cycle diesel
Bore 4.4 in 112 mm
Stroke 5.9 in 149 mm
Displacement 538 in³ 8.8 l
Compression Ratio 16.3:1 16.3:1
Aspiration Turbocharged Air-to-Air Aftercooled Turbocharged Air-to-Air Aftercooled
Fuel System HEUI HEUI
Governor Type Adem™A4 Adem™A4
Length - Maximum 155.5 in 3950 mm
Width - Minimum 56.3 in 1430 mm
Width - Maximum 56.7 in 1440 mm
Height - Minimum 67.2 in 1706 mm
Height - Maximum 86.7 in 2202 mm
Dry Weight - Genset (minimum) 5518.2 lb 2503 kg
Dry Weight - Genset (maximum) 6929.1 lb 3143 kg

D300 GC Standard Equipment

Air Inlet System

  • Aftercooler core
  • Turbocharger
  • Air cleaner - Non canister, disposable

Control Panel

  • GCCP 1.2

Cooling System

  • Jacket water pump, gear driven, centrifugal
  • Thermostats and housing
  • Coolant drain valve
  • Radiator sight gauge
  • Blower fan and fan drive with guards
  • Radiator, package mounted

Exhaust System

  • Exhaust manifold - dry

Fuel System

  • Integral tank base, 24 hours, UL142
  • Fuel priming pump
  • Engine fuel transfer pump
  • Primary fuel filter w/integral water separator and secondary filter, spin on

Generator Set

  • Complete system designed & built at ISO 9001:2000 certified facilities
  • All protective devices and control functions simulated and checked
  • Factory tested to design specifications at full load conditions

Generators and Generator Attachments

  • IP23 Protection
  • 12 Leads
  • Insulation system, Class H
  • Standard winding protection for non-harsh environments with relative humidity ? 95%
  • Voltage regulator (single phase sensing)
  • Easy access to AVR and terminals
  • Terminal box, IP22 RHS facing, bottom cable entry
  • Brushless, self-excited 2/3 pitch (600V uses Internal excitation (IE))

Governing System

  • Cat electronic governor (ADEM A4)

Lube System

  • Shallow oil pan
  • Oil cooler
  • Fumes disposal to front of radiator
  • Oil drain with valve
  • Oil filler and dipstick
  • Oil filter, spin on
  • Lubricating oil, CK-4 (10W-30)

Mounting System

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


  • Safety shutoff - High water temperature
  • Safety shutoff - Low oil pressure
  • Safety shutoff - Overspeed

Starting/Charging System

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


  • Lifting eyes
  • Vibration damper
  • Parts book

D300 GC Optional Equipment

Air Inlet System

  • Air cleaner (Non canister disposable)

Bases, Mounting & Fuel Tanks

  • Integral tank base, 24 hours, UL142
  • Audio & visual fuel alarm (@90% fuel level)
  • Wide Base - Skid
  • Fuel tank pill pipe & lockable cap

Circuit breaker

  • 400A LSI
  • 600A LSI
  • 1200A LSI
  • 800A LS/I
  • Auxiliary contacts
  • 600A LS/I
  • 1200A LS/I
  • 400A LS/I
  • 800A LSI

Control System

  • Audible alarm Gp
  • 16 -light NFPA 99/110 Annunciator
  • Twist release, Red button emergency stop
  • Ground fault relay
  • 100A Load center
  • Product link remote monitoring hardware
  • 20A GFCI (Ground Fault Circuit Interrupter)
  • Volt free contacts


  • Sound attenuated Level 2 enclosure (White)
  • AC & DC Source lights
  • E-Stop

Exhaust System

  • 6" Muffler - 25 dBA attenuation
  • Manifold and turbocharger guards
  • Flexible exhaust connection


  • Space heater
  • Permanent magnet excitation (PMG) generator

Starting System

  • Battery charger (UL Certified)
  • Jacket water heater
  • Standard battery set: 1000 CCA, 90 amp/hr.


  • CSA Certification
  • Extended Service Coverage
  • UL2200 Certification
  • Generator test report

See how D300 GC compares against frequently compared products.

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Cat RAM and Condition Monitoring

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Maintenance and Repairs

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Service Agreement (Cat® CVA & LTSA)

Every piece of Cat equipment is designed and built to provide maximum productivity and operating economy throughout its working life. Your Cat dealer can help you maintain that built-in value through a Customer Value Agreement (CVA).

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