C175-20 (60 Hz)


Producing reliable power from 3150 – 4000 ekW at 60 Hz, our C175-20 diesel generator sets are made to meet your mission critical, continuous, standby and prime applications. We’ve designed each to ISO 8528-5 transient response requirements and to accept 100% rated load in one step. The generator set is certified for low fuel consumption, U.S. EPA Stationary Emergency Use only.

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

Cat ECS 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 50°C (122°F)
  • Contact your Cat Dealer for specific ambient and altitude capabilities


  • IBC seismic certification
  • OSHPD pre-approval

One Safe Source

  • Components used in the generator set are selected at the design stage to provide optimum package 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
  • 4 x Single element air cleaner canisters with service indicator(s).
Control Panel
  • 24 Volt DC operation
  • 4 Programmable relay Inputs
  • 4 Programmable relay output
  • Alarm acknowledge
  • Amps (per phase & average)
  • Auto/start/stop control
  • Coolant temperature
  • DC volts
  • Digital indicators
  • Cat ECS 100
  • Emergency stop
  • Emergency stop pushbutton
  • Engine cool-down timer
  • Engine cycle crank
  • Environmental sealed front face
  • Failure to start (overcrank)
  • Frequency (Hz)
  • High Coolant temperature
  • Lamp test
  • Low coolant level
  • Low oil pressure
  • Oil pressure (psi, kPa or bar)
  • Operating hours
  • Overspeed
  • RPM
  • Speed adjust
  • Text alarm/event descriptions.
  • True RMS AC metering, 3-phase, +/-2% accuracy
  • Volts (L-L & L-N)
  • Wall mounted controls:
  • Warning/shutdown Indicators:
Cooling System
  • AC Inlet: 6" ANSI / AC Outlet: 3-1/2" ANSI
  • Coolant sensors
  • JW Inlet: 6" ANSI / JW Outlet: 5" Cat Flange
  • SCAC cooling
Exhaust System
  • Dry exhaust manifold
  • Dual ANSI 18" / DIN 450 flanges. Shipped loose. Support required from installation
Fuel System
  • 10 Micron spin on yype
  • 4 Micron spin on type
  • Engine mounted filters x 3
  • Filters x 3
  • Primary fuel filter water/fuel water separator
  • Secondary/tertiary fuel filters
Generators and attachments
  • 3 Phase brushless
  • 3 Phase voltage sensing
  • 6 Leads
  • Anti-condensation space heater
  • Class H temperature rise at 40C ambient
  • Exciter diode monitor
  • Form wound
  • IEC platinum stator RTDs
  • Min / max exciter limiter
  • NEMA Class H insulation
  • Permanent magnet excitation (PMG)
  • Reactive droop capability
  • RFI suppression
  • Right side extension box, bottom cable entry
  • Salient pole
  • Voltage regulator
Governing System
  • ADEM A4
  • Redundant shutdown (Overspeed protection through a duplicate speed sensing system)
Lube System
  • Fumes disposal
  • Gear type lube oil pump
  • Integral lube Oil cooler
  • Lubricating oil
  • Oil drain lines and valve
  • Oil filter, filler and dipstick
Mounting Systems
  • Rails - Engine/generator
  • Rubber anti-vibration mounts - shipped loose
Starting / Charging System
  • Batteries and battery rack w/cables
  • Battery disconnect switch
  • Dual 24 volt electric starting motors
  • Paint - Caterpillar yellow with high gloss black rails
  • Right hand servicing
  • SAE standard rotation
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