C175-20 (50 Hz)

Design Criteria

The generator set accepts 100% rated load in one step per NFPA 110 and meets ISO 8528-5 transient response.


  • Matched to the performance and output characteristics of Cat engines
  • Industry leading mechanical and electrical design
  • Industry leading motor starting capabilities
  • High Efficiency
  • Cat EMCP Control Panel

    The EMCP controller features the reliability and durability you have come to expect from your Cat equipment. EMCP4 is a scalable control platform designed to ensure reliable generator set operation, providing extensive information about power output and engine operation. EMCP4 systems can be further customized to meet your needs through programming and expansion modules.

    Single-Source Supplier

    Fully prototype tested with certified torsional vibration analysis available

    World Wide Product Support

    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

    Full Range of Attachments

    Wide range of bolt-on system expansion attachments, factory designed and tested Flexible packaging options for easy and cost effective installation

    UL 2200 / CSA - Optional

  • UL 2200 listed packages
  • CSA Certified
  • Certain restrictions may apply.
  • Consult with your Cat® Dealer.
  • C175-20 (50 Hz) Standard Equipment

    Air Inlet

    • 4 x Single element canister air cleaners with service indicator(s).

    Control Panel

    • EMCP 4.2
    • Emergency stop pushbutton
    • 24 Volt DC operation
    • Environmental sealed front face
    • Text alarm / event descriptions
    • Wall Mounted Controls
    • Speed adjust
    • Auto / start / stop control
    • Engine cool-down timer
    • Engine cycle crank
    • Alarm acknowledge
    • Lamp test
    • True RMS AC metering, 3-phase, +/-2% accuracy
    • Digital Indicators
    • RPM
    • DC volts
    • Operating hours
    • Oil pressure (psi, kPa or bar)
    • Coolant temperature
    • Volts (L-L & L-N)
    • Frequency (Hz)
    • Amps (per phase & average)
    • Warning / shutdown Indicators
    • Low oil pressure
    • High coolant temperature
    • Overspeed
    • Emergency stop
    • Failure to start (overcrank)
    • Low coolant level
    • 4 Programmable relay Inputs
    • 4 Programmable relay output

    Cooling System

    • SCAC cooling
    • JW Inlet: 6" ANSI / JW Outlet: 5" Cat Flange
    • AC Inlet: 6" ANSI / AC Outlet: 3-1/2" ANSI
    • Coolant Sensors


    • Dry exhaust manifold
    • Bolted flange (ANSI 6" & DIN 150) with bellow for each turbo (Qty 4). 50 Hz


    • Primary fuel filter water / fuel water separator
    • 10 Micron Spin On Type
    • Filters x 3
    • Secondary / tertiary fuel filters
    • 4 Micron spin on type
    • Engine mounted filters x 3

    Generators and Attachments

    • 3 Phase brushless
    • Salient Pole
    • 6 Leads
    • IEC Platinum Stator RTDs
    • Voltage Regulator:
    • Reactive droop capability
    • 3 Phase voltage sensing
    • RFI suppression
    • Min/max Exciter limiter
    • Exciter diode monitor
    • Form Wound
    • Permanent Magnet
    • NEMA Class H insulation
    • Class H temperature rise at 40C ambient
    • Anti condensation space Heater
    • Right side extension box, bottom cable entry

    Governing System

    • ADEM A4
    • Redundant Shutdown (Overspeed protection through a duplicate speed sensing system)

    Lube System

    • Lubricating oil
    • Gear type lube oil pump
    • Integral lube oil cooler
    • Oil filter, filler and dipstick
    • Oil drain lines and valve
    • Fumes disposal

    Mounting Systems

    • Rails - Engine/Generator
    • Rubber anti-vibration mounts (shipped loose)

    Starting / Charging System

    • Dual 24 volt electric starting motors
    • Batteries and battery rack w/cables
    • Battery disconnect switch


    • Paint - Caterpillar Yellow with high gloss black rails
    • Right hand service
    • SAE standard rotation

    C175-20 (50 Hz) Optional Equipment

    Air Inlet Systems

    • Single element air cleaner

    Control Panels

    • EMCP 4.3
    • EMCP and MV and HV power connection locations
    • Load share module
    • EMCP voltage and current sensing groups
    • Speed adjust
    • Annunciator modules
    • Customer interface options
    • Generator temperature monitoring
    • E-Stop
    • Interconnect harness
    • Generator harness
    • Modbus monitoring of packages
    • Vandal proof panel door

    Cooling System

    • Package mounted radiators
    • Remote radiators
    • Fuel cooler

    Crankcase Systems

    • Explosive relief valves
    • Crankcase ventilation system

    Exhaust System

    • Front housing - Standby or mission critical
    • Front housing - Prime or continuous
    • Exhaust collectors / Manifold
    • Mufflers (15, 25 and 34 dBA)

    Fuel System

    • Primary fuel filter

    Generators and Attachments

    • Medium voltage - 3000 Frames - 50 Hz, 3 phase, 1500 rpm, FW, PM, No of leads=6, Pitch 0.6667
    • Thermostat for space heater
    • Generator air cleaner
    • Differential current transformers - (5, 9 and 15 kV Class)


    • Pyrometer and thermocouples

    Lube System

    • Lube oil heater
    • Lube oil heater with crankcase explosion relief valve
    • Drain group oil pans
    • Lubricating oil
    • Electric prelube pumps
    • Oil filters

    Mounting System

    • Rubber anti-vibration mounts
    • Spring type linear vibration isolators
    • IBC vibration isolators - Shipped loose

    Special Tests / Reports

    • Generator test report
    • PGS test report @ 1.0 power factor
    • PGS test report @ 0.8 power factor
    • Standard genset TVA (Torsional Vibration Analysis) report
    • Custom genset TVA report
    • Special test charge - Engine only
    • Genset fuel consumption test
    • Standard engine test charge

    Starting / Charging System

    • 24 Volt electric starting motors
    • Air starting motor
    • Air pressure regulator
    • Starter location covers
    • 24 Volt battery sets - Dry
    • 20, 35 and 50 Amp battery chargers
    • Charging alternators - Dry
    • Jacket water heaters


    • Special paint - 3500, Colors (other than Caterpillar yellow) or high performance paints
    • US aid emblem
    • Service tools
    • Engine barring group
    • Manual
    • Engine barring Air powered
    • control GP - Air powered bar group

    Select Units


    The C175-20 diesel generator sets are made to meet your mission critical, continuous, standby and prime applications, and match your power standards. Producing reliable power from 3250 to 4000 kVA in 50 Hz, each generator set has been designed to meet ISO 8528-5 transient response requirements and to accept 100 percent rated load in one step. Our C175-20 generator sets range from low fuel consumption systems to EPA Stationary Emergency (Tier 2). Leading innovation means some models offer emissions reduced by up to 90 percent — it's technology that has benefits well beyond todays regulations. Seismic certification is also available for select models, maintaining your power after unexpected disturbances. Our integrated control system, including ATS and switchgear, ensures a consistent power supply and connection to your fleet through on-site and remote monitoring options. Our EMCP 4 control panel provides expandable controller options, with management and diagnostic tools, and a user-friendly interface. It's not just quality that matters but customization, choose from a broad range of accessories and bolt-on system expansion attachments. Find flexible packaging to fit unique spatial requirements and environmental conditions. Our C175-20 generator sets are developed for such prerequisites, so that you can meet your specific power needs.

    Generator Set Specifications

    • Minimum Rating 3150 kVA 3150 kVA
    • Maximum Rating 4000 kVA 4000 kVA
    • Emissions/Fuel Strategy Low Fuel Consumption, U.S. EPA Stationary Emergency Use Only Low Fuel Consumption, U.S. EPA Stationary Emergency Use Only
    • Voltage 3300 to 13800 Volts 3300 to 13800 Volts
    • Frequency 50 Hz 50 Hz
    • Speed 1500 RPM 1500 RPM
    • Duty Cycle Standby, Mission Critical, Prime, Continuous Standby, Mission Critical, Prime, Continuous

    Engine Specifications

    • Engine Model C175-20 SCAC, V-20, 4-Stroke Water-Cooled Diesel C175-20 SCAC, V-20, 4-Stroke Water-Cooled Diesel
    • Bore 6.89 in 175.0 mm
    • Stroke 8.66 in 220.0 mm
    • Displacement 6456.31 in³ 105.8 l
    • Compression Ratio 15:03:01 15:03:01
    • Aspiration Turbo Aftercooled Turbo Aftercooled
    • Fuel System Common Rail Common Rail
    • Governor Type ADEM™ A4 ADEM™ A4

    Generator Set Dimensions

    • Length - Minimum 261.5 in 6642.8 mm
    • Length - Maximum 330.6 in 8397.0 mm
    • Width - Minimum 85.4 in 2170.2 mm
    • Width - Maximum 330.6 in 8397.0 mm
    • Height - Minimum 87.6 in 2224.3 mm
    • Height - Maximum 150.7 in 3827.0 mm
    • Dry Weight - Genset (minimum) 55100.0 lb 25000.0 kg
    • Dry Weight - Genset (maximum) 66200.0 lb 30000.0 kg
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