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Producing reliable power from 27.0 to 60.0 ekW at 60 Hz, our C3.3 diesel generator sets designed to ISO 8528-5 transient response requirements. All C3.3 generator sets are R96/EUIIIa equivalent emissions compliant.

Generator Set Specifications

Minimum Rating 27.0 ekW 27.0 ekW Less
Maximum Rating 60.0 ekW 60.0 ekW Less
Emissions/Fuel Strategy EU Stage II & R96/EUIIIa EU Stage II & R96/EUIIIa Less
Voltage 110 to 480 Volts 110 to 480 Volts Less
Frequency 60 Hz 60 Hz Less
Speed 1800 rpm 1800 rpm Less
Duty Cycle Standby, Prime Standby, Prime Less

Engine Specifications

Engine Model Cat® C3.3 Cat® C3.3 Less
Bore 4.1 in 105.0 mm Less
Stroke 5.0 in 127.0 mm Less
Displacement 201.4 in³ 3.3 l Less
Compression Ratio 17.25:1, 19.25:1 17.25:1, 19.25:1 Less
Aspiration Turbocharged Turbocharged Less
Fuel System Direct Injection Direct Injection Less
Governor Type Mechanical Mechanical Less

Generator Set Dimensions

Length - Maximum 43.9 in 1115.0 mm Less
Width - Maximum 38.2 in 970.0 mm Less
Height - Maximum 53.6 in 1361.0 mm Less

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

SR5 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

EMCP 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 to 55°C (131°F)
  • Contact your Cat Dealer for specific ambient and altitude capabilities


Cat dealers provide extensive post-sale support including maintenance and repair agreements. Cat dealers have over 1,800 dealer branch stores operating in 200 countries. The Caterpillar S•O•S℠ program cost effectively detects internal engine component condition, even the presence of unwanted fluids and combustion by-products

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

World Wide 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

C3.3 (60 Hz) Standard Equipment

Air Inlet System
  • Air cleaner; light duty with disposable element
  • Air cleaner; light duty with disposable element

Control Panel
  • EMCP 4.1
  • EMCP4.1 control panel

Cooling System
  • Radiator and cooling fan with guards
  • Caterpillar extended life coolant
  • Fan drive, battery charging alternator drive
  • Coolant drain line with valve
  • Radiator and cooling fan with guards

Exhaust System
  • Stub pipe, gaskets, raincap & SAE exhaust flange for customer use; shipped loose
  • Stub pipe, gaskets, raincap & 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
  • Standard open set fuel tank / base supplied
  • Base, formed steel with single wall integral 8-hour fuel tank

Generators and Generator Attachments
  • Circuit breaker, IEC, 3 pole, mounted in tower panel
  • Tower panel, IP22, bottom cable entry
  • 12 leads
  • IP23 Protection
  • Voltage regulator (single phase sensing)
  • Segregated low voltage (AC/DC) wiring panel
  • 12 leads
  • IP23 Protection
  • Tower panel, IP22, bottom cable entry

Governing System
  • Mechanical and electrical governing system - model dependant
  • Mechancial governing system - model dependant

Lube System
  • Lubricating oil
  • Oil drain line with valve
  • Oil drain line with valve
  • Lubricating oil

Mounting System
  • Termination points for coolant and lube oil drain lines
  • Includes lifting provision and drag points
  • Captive linear vibration isolators between base and engine-generator
  • includes lifting provisions and termination points for coolant
  • Captive linear vibration isolators between base and engine-generator

Starting / Charging System
  • 12V Battery with rack & cables

  • Engine and alternator pre-paint, Caterpillar yellow
  • Engine and alternator pre-paint, Caterpillar Yellow

C3.3 (60 Hz) Optional Equipment

  • Alternator removal options

Alternator System
  • LC frame alternator
  • Permanent magnet
  • Anti-condensation heater
  • R frame auxilliary winding
  • LC frame alternator with coastal protection

Circuit Breakers
  • Pad-lockable breaker device
  • 4 Pole circuit breaker to 250A

Control Panels
  • EMCP 4.2

Control Panel Options
  • Volt free contacts
  • Control panel heater
  • Voltage adjust potentiometer
  • Speed adjust potentiometer
  • Earth leakage (2 wire only)
  • Battery charger
  • Panel mounted audible alarm
  • Overload shutdown via breaker
  • Earth fault (2 wire only)
  • Emergency stop with key

Cooling System
  • Coolant heater
  • Low coolant temperature alarm
  • low coolant level shutdown

  • European Upgrade to STD set for "CE"
  • Global Certification for CIS

  • Sound attenuated level 2 enclosure CE
  • Sound attenuated level 1 enclosure (GALV)
  • CEE for sockets for enclosure
  • Socket blanking plate
  • Rental pack (CAE only)

Fuel System
  • Open set narrow tankbase
  • Compact skidbase for open sets
  • Low fuel level alarm
  • Low fuel level shutdown
  • Bunded fuel tank
  • Skidbase for CALG enclosure sets
  • High fuel level alarm

Mounting Options
  • Electronic governor
  • Residential Silencer
  • Silencer installation kit
  • External single point lift - enclosure
  • Battery removal

Special Packing Inspections
  • PGS test report @ 1.0 power factor
  • PGS test report @ 0.8 power factor

  • Packing case, compact set
  • Stone guards / rad trans flange
  • Packing case, canopied set

Application Center

Explore valuable resources for generator sizing, specification, and training materials. SpecSizer evaluates load types, collects data, and organizes it to help you select the generator set that's best for you. Find product comparisons, technical data, product sizing, and more using our technical information portal (TIP) specifically created for consultants, architects, engineers, and owners.

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