1230-1500 kW Diesel Generator | 3512B (60 HZ)

Diesel Generator Sets 3512B (60 Hz) 1500 kW with Upgradeable Package

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Key Specs

Standby Rating
1500/1400 kW
1500/1400 kW
Prime Power Rating
1360/1275 kW
1360/1275 kW
Emissions/Fuel Strategy
Low Fuel, Low Emissions
Low Fuel, Low Emissions


1230 - 1500 ekW Diesel Generator Set

Our industrial diesel generators produce reliable power from 1230 to 1500 kW at 60 Hz. The 3512B diesel gensets are made to provide continuous power solutions for your business operation as well as supply standby and emergency power. Diesel engines are parallelable and meet prime applications. We've designed each to ISO 8528-5 transient response requirements and to accept 100% rated load in one step. Cat® generators are available in low fuel consumption and low emissions configurations.
Q. Can we burn HVO (hydrotreated vegetable oil) in this generator to help achieve our Sustainability goals?
A. Yes, the 3512B can burn HVO to help reduce emissions.
Q. Does the Cat generator meet 10 second starting requirements?
A. Yes, with the appropriate configuration our generators are capable of 10 second starting to meet emergency needs or customer requirements.
Q. Does this generator comply with ISO 8528 guidelines?
A. Yes, the 3512B, like all of our generators, is tested in accordance with the load steps outlined in with ISO 8528, Part 5.
Q. Is this generator noisy?
A. We offer a number of options for sound attenuation including silencers and sound attenuated enclosures for many of our generators to reduce the dB(A) levels.
Q. Where can I obtain replacement parts for a Cat generator?
A. Replacement spares are available from Cat dealers in over 200 countries worldwide.


- Cat® Generators are fully integrated power systems thaat provide continuous power for data centers, healthcare facilities or anywhere reliable power is required

- Industry leading generator technologies

- BMEP is 18% lower than other brands which means the Cat generator provides superiort block load capability and durability

- Worldwide support with 1,800 dealer branch stores operating in 200 countries. Get extensive post-sale support, including maintenance and repair agreements

Product Specifications for 3512B (60 Hz) 1500 kW with Upgradeable Package

Standby Rating 1500/1400 kW 1500/1400 kW
Prime Power Rating 1360/1275 kW 1360/1275 kW
Emissions/Fuel Strategy Low Fuel, Low Emissions Low Fuel, Low Emissions
Voltage 380 to 480 Volts 380 to 480 Volts
Frequency 60 Hz 60 Hz
Speed 1800 rpm 1800 rpm
Duty Cycle Standby, Mission Critical, Prime, Continuous Standby, Mission Critical, Prime, Continuous
Maximum Rating 1500 kW 1500 kW
Minimum Rating 1230 kW 1230 kW
Engine Model 3512B TA, V-12, 4-Stroke Water-Cooled Diesel 3512B TA, V-12, 4-Stroke Water-Cooled Diesel
Bore 6.69 in 170 mm
Stroke 7.48 in 190 mm
Displacement 51.8 in³ 3161.03 l
Compression Ratio 14.0:1 Std 15.5:1 HD 14.0:1 Std 15.5:1 HD
Aspiration TA TA
Fuel System Electronic Unit Injection Electronic Unit Injection
Governor Type ADEM™ A3 ADEM™ A3
Length - Maximum 207.8 in 5279 mm
Width - Maximum 90 in 2286 mm
Height - Maximum 94.9 in 2409 mm
Dry Weight - Genset (minimum) 24297 lb 11021 kg
Dry Weight - Genset (maximum) 24959 lb 11321 kg

3512B (60 Hz) 1500 kW with Upgradeable Package Standard Equipment

Air Inlet System

  • Air cleaner; single element canister type with service indicator

Control System

  • True RMS AC metering, 3-phase, +/-2% accuracy

Control Panel

  • DC volts
  • 24 Volt DC operation
  • kVA (per phase, average & percent)
  • Engine cool-down timer
  • Coolant temperature
  • kW-hr (total)
  • Amps (per phase & average)
  • Over/under frequency (81 o/u)
  • Text alarm/event descriptions
  • Accessory module data link
  • Alarm acknowledge
  • Warning/shutdown with common LED indication of shutdowns for:
  • Auto/start/stop control
  • Controls:
  • Failure to start (overcrank)
  • Generator mounted - rear facing
  • kVAr (per phase, average & percent)
  • kVAr-hr (total)
  • Reverse reactive power (kVAr) (32RV)
  • Volts (L-L & L-N)
  • Serial annunciator module data link
  • 4 programmable relay outputs (Form A)
  • Lamp test
  • Operating hours
  • Overcurrent (50/51)
  • kW (per phase, average & percent)
  • Communications:
  • 6 programmable digital inputs
  • RPM
  • Engine cycle crank
  • 2 Programmable relay outputs (Form C)
  • IVR includes reactive droop capability, 3-phase voltage sensing
  • High coolant temperature
  • Digital indication for:
  • Environmental sealed front face
  • Power factor (per phase & average)
  • Speed adjust
  • Emergency stop pushbutton
  • Limiter and exciter diode monitor
  • Low oil pressure
  • EMCP 4.2B
  • Low coolant level
  • 2 Programmable digital outputs
  • KVAR/PF modes, RFI suppression, min/max exciter
  • Oil pressure (psi, kPa or bar)
  • Customer data link (Modbus RTU)
  • True RMS AC metering, 3-phase, +/-2% accuracy
  • Overspeed
  • Frequency (Hz)
  • Emergency stop
  • Generator set packages include Caterpillar's voltage regulator (IVR)
  • Reverse power (kW) (32)
  • Low coolant temperature
  • Generator phase sequence
  • Programmable protective relaying functions:
  • Over/under voltage (27/59)

Cooling System

  • Caterpillar extended life coolant. (Not included with packages without radiator, installed SF44CTS, shipped loose radiators or heat exchangers)
  • Fan and belt guards
  • JWAC
  • Coolant drain line with valve
  • Coolant level sensors (Not included with packages without radiator)


  • Dry exhaust manifold
  • Flanged faced outlet(s)

Fuel System

  • Fuel cooler; not included with packages without radiator
  • Fuel priming pump
  • Secondary fuel filters
  • Flexible fuel lines - shipped loose

Generators and Attachments

  • NEMA Class H insulation
  • Winding temperature detectors
  • Internal excitation (IE) or Permanent magnet excitation (PMG)
  • LV
  • 6 Lead
  • 60 Hz models: NEMA standard hole pattern
  • Class H temperature rise at 40C ambient (125C prime / 150C standby)
  • 3 Phase brushless, Salient pole
  • Busbar connections, top center mounted, top cable entry
  • Random wound

Governing System

  • Woodward 2301A isochronous governor

Lube System

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

Mounting System

  • Rails - engine/generator/radiator mounting
  • Rubber anti-vibration mounts - shipped loose

Starting / Charging System

  • Battery disconnect switch
  • Battery and battery rack w/cables
  • 24-Volt electric starting motor
  • 50 Amp Charging alternator


  • SAE standard rotation
  • Paint - Caterpillar yellow with high gloss black rails & radiator
  • Flywheel and Flywheel housing-SAE No. 00
  • RH service

3512B (60 Hz) 1500 kW with Upgradeable Package Optional Equipment

Air Inlet System

  • Air cleaner: Includes installed single element Cat filter and service indicator
  • Dual element air filters
  • Single stage air cleaners

Control Panels

  • Cat connect (must choose one)
  • RTD module - may select one
  • Modbus monitoring of packages
  • First local annunicator
  • EMCP 4.3, EMCP 4.4
  • CAN2 network equipment
  • Remote custom annunciator
  • Locale discrete I / O package
  • Vandle proof panel door

Cooling System

  • Optional radiator arrangements
  • Water level gauge
  • Coolant

Control System

  • Generator temperature monitoring

Exhaust System

  • Exhaust Y Adapters
  • Exhaust elbows
  • Mufflers
  • Flexible fittings
  • Exhaust flange and expanders

Generators and Attachments

  • Space heater control
  • Generator conversion
  • Space heater


  • Pyrometer and thermocouples

Lube System

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

Special Tests / Reports

  • PGS Test report @ 0.8 power factor
  • Generator test report
  • Standard generator TVA report
  • PGS Test report @ 0.8 power factor
  • Custom generator TVA report
  • Torsional vibration analysis
  • PGS Test report @ 1.0 power factor
  • Standard engine test charge
  • Generator test report
  • Standard engine test charge
  • PGS Test report @ 1.0 power factor
  • Generator fuel consumption test


  • 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 busbars

Circuit breaker - LV Packages

  • Right hand power connections
  • Electronically operated circuit breakers

Mounting System

  • Low efficiency isolators
  • Spring type vibration isolators
  • Spring type vibration isolators
  • Low efficiency isolators puck

Power Connections

  • Low voltage - Package mounted circuit breakers
  • Low voltage - 1400 and 1600 Frame generators
  • Electrically operated circuit breakers
  • Low voltage - Power connection options

Starting / Charging System

  • Jacket water heater wiring groups
  • 35 Amp Battery charger
  • 20 Amp Battery charger
  • Jacket water heaters
  • 10 Amp Battery charger
  • Electric starting motors
  • Starter cover
  • Batteries, racks and cables

Starting / Charging Systems

  • Electric starting motors
  • Starter cover
  • Jacket water heater

Extended Service Coverage

  • Gold - 36,48, 60, 120 month coverage
  • Cat branded commercial power system
  • Silver - 36 ,48, 60, 120 month coverage
  • Platinum - 24, 36, 48, 60, 120 month coverage

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Cat RAM and Condition Monitoring

Observe and manage your fleet from anywhere with Cat RAM, and benefit from real-time monitoring by expert advisors with Condition Monitoring.

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Maintenance and Repairs

Retain genset value with maintenance, upgrade kits, and repair options that extend lifecycles, optimise performance, and help you control costs.

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Shop for genuine and Cat Reman parts online, with access to price, inventory, and 24/7 expert support.

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Service Agreement (Cat® CVA & LTSA)

Every piece of Cat equipment is designed and built to provide maximum productivity and operating economy throughout its working life. Your Cat dealer can help you maintain that built-in value through a Customer Value Agreement (CVA).

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