Generac Power Systems Whisper 5261 Users Manual 0174540SBY GuardEliteHSB 45 KWLC

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2015-02-09

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Standby Power Rating
45 kW 60 Hz

Liquid Cooled
Gas Engine
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

STANDARD EQUIPMENT
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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

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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

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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

FEATURES
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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™ for low noise level exercise
High flow low noise factory engineered exhaust system
State of the art digital control system with R-Series digital
control panel

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APPLICATION
& ENGINEERING DATA

STANDBY 45 kW

GENERATOR SPECIFICATIONS

ENGINE 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

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

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

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

GENERATOR FEATURES
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

CONTROL PANEL FEATURES
SEVEN LED INDICATOR LIGHTS
• System ready
• Low fuel pressure
• Low battery
• Low oil pressure
• High coolant temp/low coolant temp
• Overspeed
• Overcrank

ADDITIONAL FUNCTIONS
• Utility sensing
• Delay on utility failure for engine start
• Engine warm-up before transfer
• Delay to retransfer to utility
• Engine cooldown timer
• Exerciser not set

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

ENGINE COOLING SYSTEM
TYPE ................................................................................................ Pressurized Closed
WATER PUMP.................................................................................................Belt driven
FAN SPEED .............................................................................................................2060
FAN DIAMETER ............................................................................................... 22 inches
FAN MODE ........................................................................................................... Pusher

FUEL SYSTEM
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

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).

STANDBY 45 kW

OPERATING DATA
STANDBY 45 kW
KW RATING

45

ENGINE SIZE

2.4 Liter

GENERATOR OUTPUT VOLTAGE/KW - 60Hz
120/240V, 1-phase, 1.0 pf

KW
45

GENERATOR LOCKED ROTOR KVA
AVAILABLE @ VOLTAGE DIP OF 35%
Single phase

Exercise cycle
25% of rated load
50% of rated load
75% of rated load
100% of rated load

COMBUSTION AIR REQUIREMENTS
Flow at rated power 60 Hz

ft3/min.
US gal.
BTU/hr.
°C (°F)
°C (°F)

cfm

SOUND EMISSIONS IN DBA
db(A) @ 23 feet in exercise mode
db(A) @ 23 feet at normal operating load
EXHAUST
Exhaust flow at rated output 60 Hz
Exhaust temp. at muffler outlet
ENGINE PARAMETERS
Rated synchronous RPM
HP at rated KW

CB Size
200

100

ENGINE FUEL CONSUMPTION (Natural Gas) (Propane)

ENGINE COOLING
Air flow (inlet air including alternator and combustion air)
System coolant capacity
Heat rejection to coolant
Max. operating air temp. on radiator
Max. ambient temperature

AMP
187.5

Natural Gas
(ft3/hr.)
102
194
373
520
720

Propane
(gal/hr.)
cu ft/hr
1.11
40.4
2.12
77.1
4.07
148
5.67
206.3
7.86
286

2,725
3.0
173,000
60 (150)
50 (140)

144

61
73

cfm
°F

429
1150

60 Hz
60 Hz

3600
71

POWER ADJUSTMENT FOR AMBIENT CONDITIONS
Temperature Deration
3% for every 10 °C above - °C
1.65% for every 10 °F above - °F
Altitude Deration
1% for every 100 m above - m
3% for every 1000 ft. above - ft.

25
77
183
600

RATING: All single phase units are rated at 1.0 power factor. STANDBY RATING: Standby ratings apply to installations served by a reliable utility
source. The standby rating is applicable to varying loads for the duration of a power outage. There is no overload capability for this rating. Ratings
are in accordance with ISO-3046-1. Design and specifications are subject to change without notice. Maximum wattage and current are subject to
and limited by such factors as fuel Btu content, ambient temperature, altitude, engine power and condition, etc.

INTERCONNECTIONS

STANDBY 45 kW

INSTALLATION LAYOUT

UNIT WEIGHT: Steel 1414 lbs.
®

GENERAC POWER SYSTEMS, INC. • P.O. BOX 297 • WHITEWATER, WI 53190
www.guardiangenerators.com
Bulletin 0174540SBY / Printed in U.S.A. 05.07

© 2007 Generac Power Systems, Inc. All rights reserved. All specifications are subject to change without notice.



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