D400 GC (60 Hz) Generator Set

The D400 GC diesel generator sets have been developed to meet your needs in standby applications. Producing reliable power of 400 ekW at 60 Hz, each generator set has been designed to meet ISO 8528-5 transient response requirements and built to accept 100 % rated load in one step. Our D400 GC generator sets are engineered to EPA Stationary Emergency (Tier 3) emissions standards.

Cat Generator Set Package

  • Cat generator set packages have been fully prototype tested
  • Accepts 100% block load in one step and meets NFPA 110 loading requirements
  • Conform to ISO 8528-5 steady state and transient response requirements

Cat Diesel Engine

  • Reliable, rugged, durable design
  • Field-proven in thousands of applications worldwide
  • Four-stroke-cycle diesel engine combines consistent performance and excellent fuel economy with minimum weight

M-Frame Alternator

  • Superior motor starting capability minimizes need for oversizing alternator
  • Designed to match performance and output characteristics of Cat diesel engines
  • Robust Class H insulation

GCCP 1.2 Control Panel

  • User-friendly interface and navigation
  • Scalable system to meet a wide range of installation requirement
  • Expansion modules and site-specific programming for specific customer requirements

Cooling System

  • Designed to operate in standard ambient temperatures up to104°F (40°C)
  • Contact your Cat Dealer for specific ambient and altitude capabilities


  • UL 2200 Listed
  • ULC Certification Available

One Safe Source

  • Components used in the generator set are selected based on seamless design integration to provide the optimum performance
  • The generator set is fully assembled at a Caterpillar facility following our quality guidelines
  • Each generator set package is tested before leaving the Caterpillar facility
  • Cat product support, including dealer service, parts and warranty covers the entire Cat power system

Worldwide Product Support

  • Cat dealers have over 1,800 dealer branch stores operating in 200 countries
  • Your local Cat dealer provides extensive post-sale support, including maintenance and repair agreements

Standard Equipment

Air Inlet System
  • Air cleaner - Non canister, disposable
  • Aftercooler core
  • Turbocharger
Control Panel
  • GCCP 1.2
Cooling System
  • Blower fan and fan drive with guards
  • Coolant drain valve
  • Radiator sight gauge
  • Radiator, package mounted
  • Jacket water pump, gear driven, centrifugal
  • Thermostats and housing
Exhaust System
  • Exhaust manifold - dry
Fuel System
  • Primary fuel filter w/integral water separator and secondary filter, spin on
  • Engine fuel transfer pump
  • Fuel cooler
  • Fuel priming pump
  • Integral tank base, 24 hours, UL142
Generator Set
  • All protective devices and control functions simulated and checked
  • Complete system designed & built at ISO 9001:2000 certified facilities
  • Factory tested to design specifications at full load conditions
Generators and Generator Attachments
  • Insulation system, Class H
  • IP23 Protection
  • Standard winding protection for non-harsh environments with relative humidity ? 95%
  • 6 Leads
  • Terminal box, IP22 RHS facing, bottom cable entry
  • Easy access to AVR and terminals
  • Brushless, self-excited 2/3 pitch (600V uses Internal excitation (IE))
  • Voltage regulator (single phase sensing)
Governing System
  • Cat electronic governor (ADEM A4)
Lube System
  • Fumes disposal to front of radiator
  • Lubricating oil, CK-4 (10W-30)
  • Oil cooler
  • Shallow oil pan
  • Oil filler and dipstick
  • Oil filter, spin on
  • Oil drain with valve
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 - Low oil pressure
  • Safety shutoff - High water temperature
  • Safety shutoff - Overspeed
Starting/Charging System
  • 24-volt electric starting motor
  • 24V, 45 Amp Charging alternator
  • Lifting eyes
  • Vibration damper
  • Parts book

Additional information

Offering Type

Generator Set Specifications - Maximum Rating

400 ekW

Generator Set Specifications - Minimum Rating

400 ekW

Generator Set Specifications - Emissions/Fuel Strategy

EPA Stationary Emergency

Generator Set Specifications - Voltage

480 to 600 Volts

Generator Set Specifications - Frequency

60 Hz

Generator Set Specifications - Speed

1800 rpm

Generator Set Specifications - Duty Cycle


Engine Specifications - Engine Model

Cat® C13 In-line 6, 4-cycle diesel

Engine Specifications - Bore

130 mm ( 5.1 in )

Engine Specifications - Stroke

157 mm ( 6.2 in )

Engine Specifications - Displacement

12.5 B ( 763 in³ )

Engine Specifications - Compression Ratio


Engine Specifications - Aspiration

Turbocharged Air-to-Air Aftercooled

Engine Specifications - Fuel System


Engine Specifications - Governor Type


Generator Set Dimensions - Length - Maximum

4625 mm ( 182.8 in )

Generator Set Dimensions - Width - Maximum

1630 mm ( 64.2 in )

Generator Set Dimensions - Height - Minimum

2039 mm ( 80.3 in )

Generator Set Dimensions - Height - Maximum

2456 mm ( 96.7 in )

Generator Set Dimensions - Dry Weight - Genset (minimum)

3325 kg ( 7330.4 lb )

Generator Set Dimensions - Dry Weight - Genset (maximum)

9054.4 kg ( 4107 lb )

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