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Producing reliable power from 24.0 to 65.0 kVA at 50 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 24.0 kVA 24.0 kVA Less
Maximum Rating 65.0 kVA 65.0 kVA 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 50 Hz 50 Hz Less
Speed 1500 rpm 1500 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 (50 Hz) Standard Equipment

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

Control Panel
  • EMCP4.1 control panel
  • EMCP 4.1

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

Exhaust System
  • Stub pipe, gaskets, raincap & SAE exhaust flange
  • Stub pipe, gaskets, raincap & SAE exhaust flange for customer use; shipped loose

Fuel System
  • Base, formed steel with single wall integral 8-hour fuel tank
  • Standard open set fuel tank / base supplied
  • Standard Open set Fuel tank / base supplied
  • Base, formed steel with single wall integral 8-hour fuel tank

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

Generators and attachments
  • 12 leads
  • IP23 Protection

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

Lube System
  • Lubricating oil
  • Oil drain line with valve

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

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

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

C3.3 (50 Hz) Optional Equipment

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

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

Control Panels
  • EMCP 4.2

Control Panel Options
  • Emergency stop with key

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

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

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

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

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

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

  • Packing case, compact set
  • Packing case, canopied set

Application Centre

Explore valuable resources for generator sizing, specification, and training materials. SpecSizer evaluates load types, collects data, and organises 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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