3512 (60 Hz) with Upgradeable Package

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Cat Generator Set Package

Cat generator set packages have been fully prototype tested, and certified torsional vibration analysis reports are available. The packages are designed to accept 100% load in one step, meet the NFPA 110 requirement for loading, and conform to the ISO 8528-5 steady state and transient response requirements

Cat Diesel Engines

The four cycle Cat diesel engine combines consistent performance with excellent fuel economy and transient response that meets or exceeds ISO 8528-5. The engines have been designed and built for a wide range of applications and can be optimized for low fuel consumption or low emissions. The engines feature a reliable, rugged, and durable design that has been field proven in thousands of applications worldwide from emergency standby installations to continuously operating power plants.


The generators used on Cat packages have been designed and tested to work with the Cat engine. The generators are built with robust Class H insulation and provide industry leading motor starting capability. Random wound generators provide good generator performance in a majority of applications and form wound is available for harsh mechanical and electrical environments.

EMCP Control Panels

The EMCP controller features the reliability and durability you have come to expect from your Cat equipment. The EMCP 4 is a scalable control platform designed to ensure reliable generator set operation, providing extensive information about power output and engine operation. EMCP 4 systems can be further customized to meet your needs through programming and expansion modules.

Cooling System

The cooling system has been designed to operate in standard ambient temperatures up to 50°C (122°F), with optional high ambient radiators available. The factory installed cooling system has been designed and tested to ensure proper generator set cooling, and includes the radiator, fan, belts, and all guarding installed as standard. Contact your Cat Dealer for specific ambient and altitude capabilities.

World Wide Product Support

Cat Dealers have over 1,800 dealer branch stores operating in 200 countries, providing extensive pre-sale and post-sale support, from 98% parts availability within 24 hours to an individualized customer support agreement (CSA), the Cat dealer will provide support.

3512 (60 Hz) with Upgradeable Package Standard Equipment

Air Inlet System
  • Air cleaner; single element canister type with service indicator

Control Panel
  • EMCP 4.2B
  • Emergency stop pushbutton
  • 24-volt DC operation
  • Environmental sealed front face
  • Text alarm / event descriptions
  • Generator mounted - rear facing
  • Generator set packages include Caterpillar's Voltage Regulator (IVR).
  • IVR includes reactive droop capability, 3-phase voltage sensing
  • KVAR/PF modes, RFI suppression, min/max exciter
  • Limiter and exciter diode monitor
  • 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 indication for:
  • RPM
  • DC volts
  • Operating hours
  • Oil pressure (psi, kPa or bar)
  • Coolant temperature
  • Volts (L-L & L-N)
  • Frequency (Hz)
  • Amps (per phase & average)
  • Power Factor (per phase & average)
  • kW (per phase, average & percent)
  • kVA (per phase, average & percent)
  • kVAr (per phase, average & percent)
  • kW-hr (total)
  • kVAr-hr (total)
  • Warning / shutdown with common LED indication of shutdowns for:
  • Low oil pressure
  • High coolant temperature
  • Overspeed
  • Emergency stop
  • Failure to start (overcrank)
  • Low coolant temperature
  • Low coolant level
  • Programmable protective relaying functions:
  • Generator phase sequence
  • Over / under voltage (27/59)
  • Over / under frequency (81 o/u)
  • Reverse power (kW) (32)
  • Reverse reactive power (kVAr) (32RV)
  • Overcurrent (50/51)
  • Communications:
  • Customer data link (Modbus RTU)
  • Accessory module data link
  • Serial annunciator module data link

Cooling System
  • 6 programmable digital inputs
  • 4 programmable relay outputs (Form A)
  • 2 programmable relay outputs (Form C)
  • 2 programmable digital outputs
  • JWAC

  • Fan and belt guards.
  • Coolant drain line with valve

Fuel System
  • Coolant level sensors. (Not included with packages without radiator)
  • Caterpillar extended life coolant. (Not included with packages without radiator, installed SF44CTS, shipped loose radiators or heat exchangers)
  • Dry Exhaust Manifold
  • Flanged faced outlet(s)

Generators and Attachments
  • Secondary fuel filters
  • Fuel cooler; not included with packages without radiator
  • Flexible fuel lines - shipped loose
  • Fuel priming pump
  • 3 Phase brushless, salient pole
  • 6 Lead
  • LV:
  • Random wound
  • Internal excitation or permanent magnet
  • NEMA Class H insulation

Governing System
  • Class H temperature rise at 40C ambient (125C prime / 150C standby)

Lube System
  • Winding temperature detectors
  • Busbar connections, top center mounted, top cable entry
  • 60 Hz models: NEMA standard hole pattern
  • Woodward 2301A isochronous governor
  • Lubricating oil
  • Gear type lube oil pump

Mounting System
  • Integral lube oil cooler
  • Oil filter, filler and dipstick

Starting / Charging System
  • Oil drain lines and valve
  • Fumes disposal
  • Rails - engine/generator/radiator mounting
  • Battery disconnect switch

  • Rubber anti-vibration mounts (shipped loose)
  • 24-volt electric starting motor
  • 50 Amp charging alternator
  • Battery and battery rack w/cables
  • Paint - Caterpillar yellow with high gloss black rails & radiator
  • RH Service
  • Flywheel and Flywheel housing-SAE No. 00
  • SAE Standard Rotation

3512 (60 Hz) with Upgradeable Package Optional Equipment

Air Inlet System
  • Single stage air cleaners
  • Duel element air filters
  • Air Cleaner: Includes installed single element Cat filter and service indicator

Control Panels
  • EMCP 4.3, EMCP 4.4
  • Locale discrete I / O package
  • Cat connect (must choose one)
  • First local annunicator
  • CAN 2 network equipment
  • RTD module - may select one
  • Remote custom annunciator
  • Vandle proof panel door
  • Modbus monitoring of packages

Cooling System
  • Optional radiator arrangements
  • Water level gauge
  • Coolant

Exhaust System
  • Mufflers
  • Exhaust Y adapters
  • Exhaust Elbows
  • Exhaust flange and expanders

Generators and Attachments
  • Generator conversion
  • Space heater
  • Space heater control

  • Pyrometer and thermocouples

Lube System
  • Lube oil
  • Prelube manual sump pump
  • Electric prelube sump pump
  • Oil level regulator

Mounting System
  • Spring type vibration isolator

Special Tests / Reports
  • Generator test report
  • PGS test report @ 0.8 power factor
  • Torsional vibration analysis
  • PGS test report @ 1.0 power factor
  • Standard engine test charge

Starting / Charging Systems
  • Starter covers
  • Jacket water heater
  • Electric starting motors

  • Barring devices

Crankcase System
  • Ventilation system
  • Protection systems

Batteries and Battery Housing
  • 24 Volt battery set - Dry
  • Battery chargers - 10, 20 and 35 amp

Power Connection System
  • EMCP voltage and current sensing groups
  • Breaker power connections
  • Center post busbar

Circuit Breaker - LV Packages
  • Right hand power connections
  • Electronically operated circuit breakers


Producing reliable power from 890 eKW to 1250 eKW the 3512A with Upgradeable Packaging 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 percent rated load in one step. Our integrated control system keeps you connected through on-site and remote monitoring options. We offer easy-to-use EMCP control panel options, combining your management and diagnostic tools in one. The EMCP 4.2B controller provides multi-generator set paralleling capability, giving you the ability to add generator sets to match your growing power requirements. Browse a broad range of accessories and bolt-on system expansion attachments. Find flexible packaging to fit unique spatial requirements and environmental conditions. Our 3512A generator sets are made for demands, so you can make yours.

Generator Set Specifications

Minimum Rating 890 eKW 890 eKW Less
Maximum Rating 1250 eKW 1250 eKW Less
Voltage 220 to 13800 220 to 13800 Less
Frequency 60 Hz 60 Hz Less
Speed 1800 RPM 1800 RPM Less
Height - Maximum 93.2 in 2367.0 mm Less
Length - Maximum 222.7 in 5656.0 mm Less
Width - Maximum 77.8 in 1975.0 mm Less

Generator Set Configurations

Emissions/Fuel Strategy Low Fuel Consumption, Low Emissions Low Fuel Consumption, Low Emissions Less

Engine Specifications

Engine Model 3512A, V-12, 4-Stroke Water-Cooled Diesel 3512A, V-12, 4-Stroke Water-Cooled Diesel Less
Bore 145 mm (5.71 in) 145 mm (5.71 in) Less
Displacement 51.8 L (3161.03 in3) 51.8 L (3161.03 in3) Less
Stroke 190 mm (7.48 in) 190 mm (7.48 in) Less
Compression Ratio 13.5:1 13.5:1 Less
Aspiration TA TA Less
Governor Type Adem™A4 Adem™A4 Less
Fuel System MEUI MEUI Less
Exhaust Flange Size - Internal Diameter 203.2 mm (8.0 in) 203.2 mm (8.0 in) Less
Air Inlet Single element canister style with service indicator Single element canister style with service indicator Less