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GENERATOR SPECIFICATIONS
TYPE ...................................................................... Four-pole, revolving field
ROTOR INSULATION ....................................................................... Class F
STATOR INSULATION ...................................................................... Class H
TOTAL HARMONIC DISTORTION (line to line) .................................... <3%
TELEPHONE INTERFERENCE FACTOR (TIF) ..................................... <50
ALTERNATOR ................................................. Self-ventilated and drip-proof
BEARINGS (PRE-LUBED & SEALED) ....................................................... 1
COUPLING .................................................................... Direct, Flexible Disc
LOAD CAPACITY (STANDBY) ............................................................. 100%
LOAD CAPACITY (PRIME) .................................................................. 110%
NOTE: Emergency loading in compliance with NFPA 99, NFPA 110,
paragraph 5-13.2.6. Generator rating and performance in accordance
with ISO8528-5, BS5514, SAE J1349, ISO3046, and DIN6271 standards.
EXCITATION SYSTEM
DIRECT .................................................................. DC excitation system
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Low-velocity brushes and slip rings
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VOLTAGE REGULATION ......................................................... Solid-state
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±1% regulation
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GENERATOR FEATURES
Four pole, revolving field generator, directly connected to the engine shaft
through a heavy-duty, flexible disc for permanent alignment.
Generator meets temperature rise standards for class “F” insulation as
defined by NEMA MG1-22.4 and NEMA MG 1-1.65.
Stator windings are “trickle” varnished and rotor windings are “roll-dipped”
for complete impregnation.
Unit tested for motor starting ability by measuring instantaneous voltage
dip with an oscillograph.
All models utilize an advanced wire harness design for reliable interconnection
within the circuitry.
Magnetic circuit, including amortisseur windings, tooth and skewed stator
design, provides a minimal level of waveform distortion and an electromagnetic
interference level which meets accepted requirements for standard AM radio,
TV, and marine radio telephone applications.
Voltage waveform deviation, total harmonic content of the AC waveform,
and balanced T.I.F. (Telephone Influence Factor) have been evaluated to
acceptable standards in accordance with NEMA MG1-22.
Alternator is of drip-proof guarded construction.
Fully life-tested protective systems, including “field circuit and thermal
overload protection” and standard main line circuit breakers capable of
handling full output capacity.
System torsional acceptability confirmed during prototype testing.
ENGINE SPECIFICATIONS
MODEL ............................................................................................... 3.9GN
CYLINDERS ............................................................................................ V-6
DISPLACEMENT ........................................................ 3.9 Liter (238 cu. in.)
BORE ...............................................................................99.3 mm (3.91 in.)
STROKE ............................................................................. 84 mm (3.31 in.)
COMPRESSION RATIO ........................................................................ 9:1:1
INTAKE AIR ................................................................... Naturally Aspirated
NUMBER OF MAIN BEARINGS ................................................................ 4
CONNECTING RODS .................................................... 6-Drop forged steel
CYLINDER HEAD .......................................................................... Cast Iron
PISTONS ................................................. 6-Notched Head, Aluminum Alloy
CRANKSHAFT ........................................................................ Nodular Steel
V
ALVE TRAIN
LIFTER TYPE ...................................................................... Hydraulic Roller
INTAKE VALVE MATERIAL ..................................... Aluminized Steel Faced
EXHAUST VALVE MATERIAL ................................................. Stellite Faced
HARDENED VALVE SEATS ..................................................................... No
ENGINE GO
VERNOR
ELECTRONIC.............................................................................. Standard
FREQUENCY REGULATION, NO-LOAD TO FULL LOAD ............ 0.5%
STEADY STATE REGULATION .................................................. ±0.25%
LUBRICA
TION SYSTEM
TYPE OF OIL PUMP ............................................................................ Gear
OIL FILTER ...................................................................... Full flow, cartridge
CRANKCASE CAPACITY ............................................. 4.25 Liters (4.5 qts.)
COOLING SYSTEM
TYPE OF SYSTEM ........................................ Pressurized, closed recovery
WATER PUMP .......................................................... Pre-lubed, self-sealing
TYPE OF FAN ................................................................................... Pusher
NUMBER OF FAN BLADES ..................................................................... 10
DIAMETER OF FAN ............................................................ 559 mm (22 in.)
FUEL SYSTEM
FUEL
Natural Gas or L.P. Vapor .......................................................... Standard
CARBURETOR ............................................................................ Down draft
SECONDARY FUEL REGULATOR ............ Nat. Gas or L.P. Vapor Systems
AUTOMATIC FUEL LOCKOFF SOLENOID ................................... Standard
OPERATING FUEL PRESSURE VAPOR SYSTEMS ..Nat. Gas 5 to 14” H
2
O
LP Vapor.....11” to 14” H
2
O
ELECTRICAL SYSTEM
BATTERY CHARGE ALTERNATOR ................................... 20 Amps at 12 V
STARTER MOTOR .................................................................................. 12 V
RECOMMENDED BATTERY ................................... (1) - 12 V, 90 A.H., 27F
GROUND POLARITY ..................................................................... Negative
APPLICATION & ENGINEERING DATA
Home Standby - 40
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).