New CAT Equipment

D125 GC Generator Set

125 ekW Diesel Generator Set

Producing reliable power of 125 ekW at 60 Hz, our D125 GC diesel generator sets designed to ISO 8528-5 transient response requirements. All D125 GC generator sets are available with a choice of emissions levels.

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    Reliability tested for 500 Hours

    Ensures you can count on emergency power when it is needed

    Saves up to 11% Installed Space

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

    Spare Parts 98% Fulfillment within 24 hours

    World's best product support network ensures spare parts are readily available for maintenance and service needs
    • Engine Specifications
      Turbocharged, Air to Air Aftercooled
      4.1 in
      Compression Ratio
      428 in³
      Engine Model
      C7.1 I-6, 4-Cycle Diesel
      Fuel System
      Electronic, Common Rail
      Governor Type
      5.3 in
    • Generator Set Dimensions
      Dry Weight - Genset (maximum)
      3099 lb
      Height - Maximum
      52.2 in
      Length - Maximum
      103.7 in
      Width - Maximum
      51.2 in
    • Generator Set Specifications
      Duty Cycle
      Emissions/Fuel Strategy
      U.S. EPA Cert., Tier 3
      60 Hz
      Maximum Rating
      125 ekW
      Minimum Rating
      125 ekW
      1800 rpm
      208 to 600 Volts
    Air Inlet System
    • Air cleaner; light duty with disposable element
    Control Panels
    • GCCP 1.2 Control panel
    Cooling System
    • Fan drive, battery charging alternator drive
    • Coolant drain line with valves
    • Caterpillar extended life coolant
    • Radiator and cooling fan with guards
    Generator and Generator Attachments
    • Segregated low voltage (AC/DC) wiring panel
    • IP23 Protection
    • Circuit breaker, IEC, 3 pole, mounted in tower panel
    • Voltage regulator (single phase sensing)
    • Tower panel, IP22, bottom cable entry
    • 12 Leads
    Exhaust System
    • Stub pipe, gaskets, raincap and SAE exhaust flange for customer use - shipped loose
    Fuel System
    • Base, formed steel with single wall integral 24-hour fuel tank
    • Standard open set fuel tank/base supplied
    Lube System
    • 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
    Starting / Charging System
    • 24V battery with rack and cables
    Governing System
    • Mechanical and electrical governing system - model dependent
    • Engine and alternator pre-paint, Caterpillar yellow
    Alternator System
    • Alternator removal
    • Optional LC Frame alternator
    • R Frame auxiliary winding: R2273L4 SE aux alt 07, aux alt 08 and aux alt 10
    • Permanent magnet excitation (PMG)
    • Anti-condensation heater
    • 3 Phase sensing
    • Quatrature droop king
    Circuit breakers
    • Padlockable breaker device
    • 4 Pole 250A, 400A and 630A Circuit breakers
    Control Panel Options
    • Battery charger
    • Control panel heater
    • Earth fault (2 wire only)
    • Volt free contacts
    • Emergency stop with key
    • Speed adjust potentiometer
    • Earth leakage (2 wire only)
    • Overload shutdown via breaker
    • Speed adjust contacts
    • Panel mounted audible alarm
    Control System
    • Volt free contacts for generator set running
    • Volt free contacts for common alarm
    • Static battery charger
    • GCCP 1.2
    Cooling System
    • Coolant heater
    • Low coolant temperature
    • Low coolant level shutdown
    • Sound attenuated level 2 enclosure
    Mounting Options
    • Silencer installation kit
    • Residential silencer
    • Battery removal
    • Industrial silencer removal
    • Electronic governor
    Fuel Systems
    • Low fuel level shutdown
    • Open set narrow tankbase
    • Skidbase for CALG enclosure sets
    • DEFRA bunded fuel tank
    • Low fuel level alarm
    • Compact skidbase for open sets
    • High fuel level alarm
    Test Reports
    • PGS Test report @ 0.8 power factor
    • PGS Test report @ 1.0 power factor
    • Stone guards/radiator trans flange
    Global Certifications
    • Certification for CIS
    Power Termination
    • Circuit breaker, IEC, 4 pole
    Accessories / Miscellaneous
    • Packing case - compact set
    • Packing case - canopied set