Generac 5261 User Manual
Standby Power Rating
Liquid Cooled
Gas Engine
45 kW 60 Hz
STANDARD EQUIPMENT
• All input connections in one single area
• High coolant temperature shutdown
• Low oil pressure shutdown
• Low coolant level automatic shutdown
• Overspeed automatic shutdown
• Crank timer
• Exercise timer
• Oil drain extension
• Cool flow radiator
• Closed coolant recovery system
Generator Sets
Model Number: 5261 (Steel - Tan)
Whisper-Test™
Low Speed Exercise
61 dB(A) at 23 feet
GENERAC 2.4L ENGINE
Naturally Aspirated
Gaseous Fueled
UL 2200 Listed
Transfer Switch is sold separately
• UV/Ozone resistant hoses
• Watertight state of the art electrical connectors
• Mainline circuit breaker
• Radiator drain extension
• Battery charge alternator
• 2 Amp static battery charger
• Battery rack and battery cables
• Fan and belt guards
• Isochronous governor
• Flex fuel line pigtail
FEATURES
• Innovative design and fully prototype tested
• UL 2200 Listed
• Solid state frequency compensated voltage regulator
• Dynamic and static battery charger
• Sound attenuated acoustically designed enclosure
•
Whisper-Test™
• High flow low noise factory engineered exhaust system
• State of the art digital control system with R-Series digital
control panel
for low noise level exercise
• Rodent proof construction
• High efficiency, low distortion Generac designed
alternator
• Vibration isolated from mounting base
• Matching Generac transfer switches engineered and
tested to work as a system
• All components easily accessible for maintenance
• Electrostatically applied textured powder paint
• Acoustically designed engine cooling system
APPLICATION
& ENGINEERING DATA
GENERATOR SPECIFICATIONS
TYPE ...........................................................................................................Synchronous
ROTOR INSULATION .......................................................................................... Class H
STATOR INSULATION .........................................................................................Class H
TOTAL HARMONIC DISTORTION ........................................................................... <5%
TELEPHONE INTERFERENCE FACTOR (TIF) ........................................................<50
ALTERNATOR OUTPUT LEADS 3 PHASE ...........................................................4 wire
BEARINGS .................................................................................................... Sealed Ball
COUPLING .................................................................................................. Flexible Disc
LOAD CAPACITY (STANDBY RATING) ................................................................ 45 kW
EXCITATION SYSTEM ........................................................................................... Direct
NOTE: Generator rating and performance in accordance with
ISO8528-5, BS5514, SAE J1349, ISO3046, and DIN6271 standards.
VOLTAGE REGULATOR
TYPE ................................................................................................................Electronic
SENSING ................................................................................................... Single Phase
REGULATION .......................................................................................................... ± 1%
FEATURES ............................................................................................... V/F Adjustable
Adjustable Voltage and Gain
LED Indicators
GENERATOR FEATURES
STANDBY 45 kW
ENGINE SPECIFICATIONS
MAKE ................................................................................................................ Generac
MODEL ................................................................................................................. Inline 4
CYLINDERS ...................................................................................................................4
DISPLACEMENT .............................................................................. 2.4 Liter, 146 cu. in.
BORE ........................................................................................................................3.41
STROKE ....................................................................................................................3.94
COMPRESSION RATIO ........................................................................................... 8.5:1
INTAKE AIR SYSTEM ....................................................................... Naturally Aspirated
VALVE SEATS .......................................................................................Precision ground
LIFTER TYPE ....................................................... Overhead Valve Push Rod, Hydraulic
GOVERNOR SPECIFICATIONS
TYPE ................................................................................................................Electronic
FREQUENCY REGULATION ....................................................................... Isochronous
STEADY STATE REGULATION .......................................................................... ± 0.25%
ENGINE LUBRICATION SYSTEM
OIL PUMP ................................................................................................................Gear
OIL FILTER ............................................................................. Full flow spin-on cartridge
CRANKCASE CAPACITY ...................................................................................4 Quarts
Revolving field heavy duty generator
Directly connected to the engine
Operating temperature rise 120 °C above a 40 °C ambient
Insulation is Class H rated at 150 °C rise
All models are fully prototyped tested
ENGINE COOLING SYSTEM
TYPE ................................................................................................ Pressurized Closed
WATER PUMP .................................................................................................Belt driven
FAN SPEED .............................................................................................................2060
FAN DIAMETER ............................................................................................... 22 inches
FAN MODE ........................................................................................................... Pusher
CONTROL PANEL FEATURES
FUEL SYSTEM
SEVEN LED INDICATOR LIGHTS ADDITIONAL FUNCTIONS
• System ready • Utility sensing
• Low fuel pressure • Delay on utility failure for engine start
• Low battery • Engine warm-up before transfer
• Low oil pressure • Delay to retransfer to utility
• High coolant temp/low coolant temp • Engine cooldown timer
• Overspeed • Exerciser not set
• Overcrank
INTERNAL FUNCTIONS:
• 3 position switch (auto, off and manual)
• 2 wire start for any transfer switch
• Communicates with the Generac RTS transfer switch
• Built-in 7 day exerciser
• Selectable engine speed at exercise
• Governor controller is built into the master control board
• Temperature range -40 °C to 70 °C
Rating definitions - Standby: Applicable for supplying emergency power for the duration of the utility power outage. No overload capability is available for this rating. (All ratings in accordance with
BS5514, ISO3046 and DIN6271). (All ratings in accordance with BS5514, ISO3046, ISO8528 and DIN6271).
FUEL TYPE .......................................................................... Natural gas, propane vapor
CARBURETOR...............................................................................................Down Draft
SECONDARY FUEL REGULATOR ...................................................................Standard
FUEL SHUT OFF SOLENOID ..........................................................................Standard
OPERATING FUEL PRESSURE ..................................................................5” - 14” H2O
ELECTRICAL SYSTEM
BATTERY CHARGE ALTERNATOR .............................................................12V 30 Amp
STATIC BATTERY CHARGER .............................................................................. 2 Amp
RECOMMENDED BATTERY ...........................................................Group 26, 525 CCA
SYSTEM VOLTAGE ............................................................................................. 12 Volts
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