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3512 with Upgradeable Package

3512 with Upgradeable Package

The 3512A generator set withUpgradeable Packaging has been developed for a wide range of applications, from emergency standby installations such as healthcare and datacenters to continuously powering remote installations. The packages can be optimized for performance that matters to you with either low emissions or low fuel consumption versions available. Backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty, Cat generator sets will provide the reliability and durability you expect.

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Standby Rating1250/1100 ekW

Prime Power Rating1135/1000 ekW

Emissions/Fuel StrategyLow Fuel Consumption

Voltage380 to 480 Volts

Frequency60 Hz

Speed1800 rpm

Duty CycleStandby, Mission Critical, Prime, Continuous

Maximum Rating1250 ekW

Minimum Rating890 ekW

Engine Model3512A, V-12, 4-Stroke Water-Cooled Diesel




Compression Ratio13.5:1


Fuel SystemMUI

Governor TypeWoodward

Length - Maximum203.5in

Width - Maximum79.3in

Height - Maximum92in

Dry Weight - Genset (minimum)22099lb

Dry Weight - Genset (maximum)22540lb


Air cleaner; single element canister type with service indicator


Single stage air cleaners

Dual element air filters


Auto/start/stop control

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

kVAr-hr (total)


kVAr (per phase, average & percent)

Customer data link (Modbus RTU)

KVAR/PF modes, RFI suppression, min/max exciter

Overcurrent (50/51)

IVR includes reactive droop capability, 3-phase voltage sensing

Generator phase sequence

6 programmable digital inputs

Engine cool-down timer

Limiter and exciter diode monitor

Over/under voltage (27/59)

Low coolant temperature

Generator set packages include Caterpillar's voltage regulator (IVR)

Accessory module data link

Low oil pressure

Over/under frequency (81 o/u)

Generator mounted - rear facing

Reverse reactive power (kVAr) (32RV)

Emergency stop

Lamp test


kVA (per phase, average & percent)

Operating hours

DC volts

Low coolant level

Programmable protective relaying functions:

Frequency (Hz)

Amps (per phase & average)

Environmental sealed front face

Failure to start (overcrank)

Power factor (per phase & average)


kW (per phase, average & percent)

Oil pressure (psi, kPa or bar)

24 Volt DC operation

4 programmable relay outputs (Form A)

Emergency stop pushbutton

2 Programmable relay outputs (Form C)


Digital indication for:

Engine cycle crank

Speed adjust

Coolant temperature

2 Programmable digital outputs

Text alarm/event descriptions

Serial annunciator module data link


kW-hr (total)

Volts (L-L & L-N)

Alarm acknowledge

Warning/shutdown with common LED indication of shutdowns for:

Reverse power (kW) (32)

High coolant temperature


Coolant level sensors (Not included with packages without radiator)

Coolant drain line with valve

Fan and belt guards


Caterpillar extended life coolant. (Not included with packages without radiator, installed SF44CTS, shipped loose radiators or heat exchangers)

Caterpillar extended life coolant. (Not included with packages without radiator, installed SF44CTS, shipped loose radiators or heat exchangers)



Water level gauge

Optional radiator arrangements


Dry exhaust manifold

Flanged faced outlet(s)


Fuel priming pump

Fuel cooler; not included with packages without radiator

Secondary fuel filters

Flexible fuel lines - shipped loose


Internal excitation (IE) or Permanent magnet excitation (PMG)

Winding temperature detectors

6 Lead


60 Hz models: NEMA standard hole pattern

Busbar connections, top center mounted, top cable entry

3 Phase brushless, Salient pole

Random wound

NEMA Class H insulation

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

KVAR/PF modes

Exciter diode monitor

Caterpillar's digital voltage regulator (CDVR) includes:

RFI suppression

Reactive droop capability

Min / max exciter limiter

Note: 1800 Frames are form wound, permanent magnet excitation (PMG), with winding temp detectors

Generator set packages include: Regulator (CDVR)

3 Phase voltage sensing


Space heater control

Space heater

Generator conversion

Space heater

Space heater control

1500 RPM, 380/400/415volts @ 50 Hz, 3 phase, random wound, Permanent magnet excitation (PMG), No. of leads = 6, pitch= 0.6667

1500 RPM, 380/400/415volts @ 50 Hz, 3 phase, Form wound, Permanent magnet excitation (PMG), No. of leads = 6, pitch= 0.6667


Woodward 2301A isochronous governor


Fumes disposal

Lubricating oil

Gear type lube oil pump

Oil filter, filler and dipstick

Integral lube Oil cooler

Oil drain lines and valve


Oil level regulator

Lube oil

Primary fuel systems

Prelube sump pump

Oil level regulator


Rails - engine/generator/radiator mounting

Rubber anti-vibration mounts - shipped loose


Spring type vibration isolators

Puck style low efficiency lsolators

IBC vibration isolators

Spring type vibration isolators


24-Volt electric starting motor

Battery and battery rack w/cables

50 Amp Charging alternator

Battery disconnect switch


Flywheel and Flywheel housing-SAE No. 00

SAE standard rotation

RH service

Paint - Caterpillar yellow with high gloss black rails & radiator


Barring devices


2000, 2500, 3200 and 4000 Amp, 4 pole, IEC rated Circuit breakers


Remote custom annunicator

CAN2 network equipment

Modbus monitoring of packages

EMCP 4.3, EMCP 4.4

Local discrete I/O package

Vandle proof panel door

Cat connect

Load share module options

First local annunciator


Exhaust flexible fittings

Industrial grade (15 db) mufflers

Exhaust elbows

Exhaust Y Adapters


Gensets vibration analysis

PGS Test report @ 1.0 power factor

PKG factory test report

Standard genset TVA report

Standard engine test charge

Fuel consumption test

Generator test report

Standard engine test charge

PGS Test report @ 0.8 power factor

PGS Test report @ 1.0 power factor

Torsional vibration analysis

Generator test report


Protection systems

Ventilation system

Protection systems

Ventilation system


Battery chargers - 10, 20 and 35 amp

24 Volt battery set - Dry

Battery chargers - 10, 20 and 35 amp

24 Volt battery set - Dry


Pyrometer and thermocouples


Explosion relief valves


Oversize battery set

Jacket water heater

Electric starting motors

Jacket water heaters

24 Volt dual electric starting motor

Starter cover


Breaker power connections

EMCP voltage and current sensing groups

Center post busbars


Electronically operated circuit breakers

Right hand power connections



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