Guardian Technologies QT048 User's Manual

QT048

Standby Power Rating

48 kW 60 Hz

Liquid Cooled Gas Engine Generator Sets

GENERAC 4.2L ENGINE

Naturally Aspirated

Gaseous Fueled

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

• UV/Ozone resistant hoses

• Watertight state of the art electrical connectors

FEATURES

• Innovative design and fully prototype tested

• UL2200 Listed

• Solid state frequency compensated voltage regulator

• Dynamic and static battery charger

• Sound attenuated acoustically designed enclosure

• Quiet test for low noise level exercise

• Acoustically designed engine cooling system

• High flow low noise factory engineered exhaust system

• Mainline circuit breaker

• Radiator drain extension

• Battery charge alternator

• 2 Amp static battery charger

• Battery cables

• Battery rack

• Fan and belt guards

• Isochronous governor

• Flex fuel line

• Hour meter

• State of the art digital control system with R100 digital control panel

• Watertight electrical connectors

• 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 powder paint

APPLICATION

& ENGINEERING DATA

QT048

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) ................................................................ 48 kW

EXCITATION SYSTEM ........................................................................................... Direct

ENGINE SPECIFICATIONS

MAKE ................................................................................................................ Generac

MODEL ........................................................................................................................ V6

CYLINDERS ...................................................................................................................6

DISPLACEMENT .................................................................................................4.2 Liter

BORE (inches) ..........................................................................................................3.81

STROKE (inches) ......................................................................................................3.74

COMPRESSION RATIO ...........................................................................................9.3:1

INTAKE AIR SYSTEM ....................................................................... Naturally Aspirated

VALVE SEATS (Int. & Exh.) ........................................... Precision ground and hardened

LIFTER TYPE ........................................................................................ Roller, Hydraulic

NOTE: Generator rating and performance in accordance with

ISO8528-5, BS5514, SAE J1349, ISO3046, and DIN6271 standards.

GOVERNOR SPECIFICATIONS

VOLTAGE REGULATOR

TYPE ................................................................................................................Electronic

FREQUENCY REGULATION ....................................................................... Isochronous

STEADY STATE REGULATION .......................................................................... ± 0.25%

TYPE ................................................................................................................Electronic

SENSING ................................................................................................... Single Phase

REGULATION .......................................................................................................... ± 1%

FEATURES ............................................................................................... V/F Adjustable

Adjustable Voltage and Gain

LED Indicators

ENGINE LUBRICATION SYSTEM

OIL PUMP ................................................................................................................Gear

OIL FILTER ............................................................................. Full flow spin-on cartridge

CRANKCASE CAPACITY ...................................................................................6 Quarts

GENERATOR FEATURES

Revolving field heavy duty generator





Insulation is Class H rated at 150 °C rise



ENGINE COOLING SYSTEM

TYPE ................................................................................................ Pressurized Closed

WATER PUMP FLOW ..................................................................................10.8 gal/min

FAN SPEED .............................................................................................................1050

FAN DIAMETER ............................................................................................... 22 inches

FAN MODE ..............................................................................................................Puller

CONTROL PANEL FEATURES

 SEVEN LED INDICATOR LIGHTS  ADDITIONAL FUNCTIONS

• System ready

• Low fuel pressure

• Low battery

• Utility sensing

• Delay on utility failure for engine start

• Engine warm-up before transfer

• Low oil pressure • Delay to retransfer to utility

• High coolant temp/low coolant temp • Engine cooldown timer

• Overspeed

• Overcrank

• Exerciser not set

• Hour meter

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

 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

ELECTRICAL SYSTEM

BATTERY CHARGE ALTERNATOR .............................................................12V 30 Amp

STATIC BATTERY CHARGER .............................................................................. 2 Amp

RECOMMENDED BATTERY .......................................................... Group 24F, 525CCA

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).

QT048

OPERATING DATA

kW RATING

ENGINE SIZE

GENERATOR OUTPUT VOLTAGE/KW - 60Hz

120/208V, 3-phase, 0.8 pf

120/240V, 3-phase, 0.8 pf

277/480V, 3-phase, 0.8 pf

GENERATOR LOCKED ROTOR KVA

AVAILABLE @ VOLTAGE DIP OF 35%

Single phase or 208 3-phase

480V 3-phase

ENGINE FUEL CONSUMPTION (Natural Gas) (Propane)

Exercise cycle

25% of rated load

50% of rated load

75% of rated load

100% of rated load

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

COMBUSTION AIR REQUIREMENTS

Flow at rated power 60 Hz

SOUND EMISSIONS IN DBA

Exercising at 7 meters

Normal operation at 7 meters ft 3 /min.

US gal.

BTU/hr.

°C (°F)

°C (°F) cfm

EXHAUST

Exhaust flow at rated output 60 Hz

Exhaust temp. at muffler outlet

ENGINE PARAMETERS

Rated synchronous RPM

HP at rated KW cfm

°F

60 Hz

60 Hz

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.

kW - LP

48

48

48

Natural Gas

(ft 3 /hr.)

88

205

370

516

661

QT048

48

4.2 Liter V6

Amps kW - NG Amps

166 46 160

144

72

46

46

138

69

100

110

(gal/hr.)

0.94

2.23

4.03

5.62

7.20

2,460

3.0

165,000

60 (150)

50 (140)

235

60

65

395

1100

1800

75

25

77

183

600

Propane

CB Size

175

150

80 cu ft/hr

34.4

81

147

204

261

RATING: All three phase units are rated at 0.8 power factor. 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, BS5514, and DIN6271. Maximum wattage and current are subject to and limited by such factors as fuel Btu content, ambient temperature, altitude, engine power and condition. Design and specifications are subject to change without notice.

KW rating is based on LPG Fuel and may derate with natural gas.

INTERCONNECTIONS

QT048

Installation Drawing Ref. No. 0G5868

INSTALLATION LAYOUT

48/46 240 1

Ø

200

48/46 208 3

Ø

175

48/46 240 3

Ø

150

48/46 480 3 Ø 80

#6 to 300 mcm

#6 to 300 mcm

#6 to 300 mcm

#6 to 300 mcm

WEIGHT: 1740 lbs.

Generac Power Systems, Inc. • P.O. Box 8, Waukesha, WI 53187 • generac.com

©2008 Generac Power Systems, Inc. All rights reserved. All specifications are subject to change without notice. Bulletin 0179270SBY/Printed in U.S.A. 09.08