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SPECIFICATIONS
STATIONARY EMERGENCY GENERATOR
Type......................................................................Synchronous
Rotor Insulation ..............................................................Class F
Stator Insulation ............................................................Class H
Telephone Interference Factor (TIF) .................................. < 50
Alternator Output Leads 3-phase ..................................... 4-wire
Bearings ..................................................................Sealed Ball
Coupling ................................................................Flexible Disc
Load Capacity (Standby Rating) .....................................45kW*
* NOTE: Generator rating and performance in accordance with ISO8528-5, BS5514, SAE
J1349, ISO3046 and DIN 6271 Standards. KW rating is based on LPG fuel and may derate
with natural gas.
Excitation System ............................................................Direct
Generator Output Voltage/kW - 60 Hz kW Amp CB Size
120/240V, 1-phase, 1.0 pf 45 188 200
120/208V, 3-phase, 0.8 pf 45 156 175
120/240V, 3-phase, 0.8 pf 45 135 150
277/480V, 3-phase, 0.8 pf 45 68 80
Generator Locked Rotor KVA Available @ Voltage Dip of 35%
Single-phase or 208, 3-phase (45kW) ........................ 86 KVA
480V, 3-phase (45kW) ................................................ 95 KVA
ENGINE
Make ........................................................................... Generac
Cylinders and Arrangement .........................................6, V-type
Displacement ............................................................... 4.2 Liter
Bore............................................................ 96.8 mm (3.81 in.)
Stroke ............................................................ 95 mm (3.74 in.)
Compression Ratio....................................................... 9.4-to-1
Air Intake System ......................................... Naturally Aspirated
Valve Seats ....................................Precision Ground, Hardened
Lifter Type ........................................................ Roller, Hydraulic
Spark Plug Gap ..................... 1.30-1.40mm (0.052-0.056 inch)
Engine Parameters
Rated Synchronous RPM .......................................60 Hz, 1800
Exhaust System
Exhaust Flow at Rated Output 60 Hz (45kW) ................330 cfm
Exhaust Temp. at Rated Output (45kW) .........................1025° F
Combustion Air Requirements (Natural Gas)
Flow at rated power, 60 Hz (45kW) ..............................120 cfm
Governor
Type...........................................................................Electronic
Frequency Regulation ............................................. Isochronous
Steady State Regulation ..............................................± 0.25%
Engine Lubrication System
Type of Oil Pump ...............................................................Gear
Oil Filter ......................................... Full Flow Spin-on, Cartridge
Crankcase Oil Capacity ......................................... 5.0 U.S. qts.
COOLING SYSTEM
Type............................................. Pressurized Closed Recovery
Water Pump ............................................................. Belt Driven
Fan Speed ..................................................................1300 rpm
Fan Diameter ..............................................................22 inches
Fan Mode ......................................................................... Puller
Air Flow (inlet air including alternator and
combustion air) ................................................. 2460 ft
3
/min.
Coolant Capacity ......................................11.4 L (3.0 U.S. gal.)
Heat Rejection to Coolant (45kW) .......................186,000 Btu/h
Maximum Operating Air Temp. on Radiator ......... 60° C (150° F)
Maximum Ambient Temperature ......................... 50° C (140° F)
FUEL SYSTEM
Type of Fuel ....................................Natural Gas, Propane Vapor
Carburetor............................................................... Down Draft
Secondary Fuel Regulator............................................ Standard
Fuel Shut-off Solenoid ................................................. Standard
Operating Fuel Pressure ................. 5 in. - 14 in. Water Column
Fuel Consumption - ft
3
/hr (Natural Gas/LPV)
Exercise 25% 50% 75% 100%
Cycle Load Load Load Load
45kW 70/28 205/81 370/147 516/205 655/260
ELECTRICAL SYSTEM
Battery Charge Alternator ......................................12V, 30 Amp
Static Battery Charger ..................................................2.5 Amp
Recommended Battery ............................... Group 24F, 525CCA
System Voltage ............................................................ 12 Volts
Voltage Regulator
Type...........................................................................Electronic
Sensing ................................................................ Single-phase
Regulation ........................................................................± 1%
Features ......................................... Adjustable Voltage and Gain
Power Adjustment for Ambient Conditions
Temperature Deration
3% for every 10° C above °C (45kW) ..................................25
1.65% for every 10° above °F (45kW) .................................77
Altitude Deration
1% for every 100 m above m (45kW) ...............................183
3% for every 1000 ft. above ft. (45kW) .............................600
Controller ................................................................. Nexus
6-1
GenSpec094 Rev. B 05/11
Specifications
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