C175-20 (50 Hz)

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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 4 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


  • UL2200
  • IBC seismic certification
  • OSHPD pre-approval
  • EU Certification of Conformance (CE)
  • EEC Declaration of Conformity

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

C175-20 (50 Hz) Standard Equipment

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

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

Cooling System
  • JW Inlet: 6" ANSI / JW Outlet: 5" Cat Flange
  • SCAC cooling
  • 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

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

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

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

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

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

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

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

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


Producing reliable power from 3250 to 4000 kVA in 50 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 per cent rated load in one step. The generator set is optimized for low fuel consumption or low emissions.

Generator Set Specifications

Minimum Rating 3150 kVA 3150 kVA Less
Maximum Rating 4000 kVA 4000 kVA Less
Emissions/Fuel Strategy Low Fuel, Low Emissions Low Fuel, Low Emissions Less
Voltage 3300 to 11000 Volts 3300 to 11000 Volts Less
Frequency 50 Hz 50 Hz Less
Speed 1500 RPM 1500 RPM Less
Duty Cycle Standby, Mission Critical, Prime, Continuous Standby, Mission Critical, Prime, Continuous Less

Engine Specifications

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

Generator Set Dimensions

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

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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