Spec Sheet

G4-224 (150ERESC) 7/18e
Alternator Specifications
Specifications Alternator
Manufacturer Kohler
Type 4-Pole, Rotating-Field
Exciter type Brushless, Rare-Earth
Permanent- Magnet
Leads: quantity, type
4RX, 4SX 12, Reconnectable
4TX 4, 120/240
Voltage regulator Solid State, Volts/Hz
Insulation: NEMA MG1
Material Class H
Temperature rise
130_C, Standby
Bearing: quantity, type 1, Sealed
Coupling Flexible Disc
Amortisseur windings Full
Voltage regulation, no-load to full-load
±0.5%
Unbalanced load capability 100% of Rated Standby
Current
One-step load acceptance 100% of Rating
Peak motor starting kVA: (35% dip for voltages below)
480 V 4R13X (12 lead) 540 (60 Hz)
480 V 4S12X (12 lead) 480 (60 Hz)
480 V 4S13X (12 lead) 570 (60 Hz)
240 V 4T13X (4 lead) 440 (60 Hz)
D NEMA MG1, IEEE, and ANSI standards compliance for
temperature rise and motor starting.
D Sustained short-circuit current of up to 300% of the rated
current for up to 10 seconds.
D Sustained short-circuit current enabling downstream circuit
breakers to trip without collapsing the alternator field.
D Self-ventilated and dripproof construction.
D Vacuum-impregnated windings with fungus-resistant epoxy
varnish for dependability and long life.
D Superior voltage waveform from a two-thirds pitch stator and
skewed rotor.
D Total harmonic distortion (THD) from no load to full load with
a linear load is less than 4%.
Application Data
Engine
Engine Specifications
Manufacturer PSI
Engine: model, type Industrial 8.8 L, 4-Cycle,
Turbocharged and
Charge Cooled
Cylinder arrangement V-8
Displacement, L (cu. in.) 8.8 (537)
Bore and stroke, mm (in.) 110 x 114 (4.35 x 4.5)
Compression ratio 10.1:1
Piston speed, m/min. (ft./min.) 411 (1350)
Main bearings: quantity, type 5, Bi-Metal Steel and
Aluminum
Rated rpm 1800
Max. power at rated rpm, NG, kW (HP) 193 (259)
Max. power at rated rpm, LP, kW (HP) 169 (226)
Cylinder head material Cast Iron
Piston type and material Flat Top, Hypereutectic
Cast Alum.
Crankshaft material Forged Steel, Induction
Hardened, Tangential Fillet
Valve (exhaust) material Int.-A193 Exh. Inconel
Governor type Electronic
Frequency regulation, no-load to full-load Isochronous
Frequency regulation, steady state 0.5%
Frequency Fixed
Air cleaner type, all models Dry
Exhaust
Exhaust System
Exhaust manifold type Dry
Exhaust flow at rated kW, m
3
/min. (cfm) 27.5 (971)
Exhaust temperature at rated kW, dry
exhaust, _C(_F)
649 (1200)
Maximum allowable back pressure,
kPa (in. Hg)
10.2 (3.0)
Exhaust outlet size at engine hookup See ADV drawing
Engine Electrical
Engine Electrical System
Ignition system Individual Coil
Near Plug Ignition
Battery charging alternator:
Ground (negative/positive) Negative
Volts (DC) 12
Ampere rating 70
Starter motor rated voltage (DC) 12
Battery, recommended cold cranking
amps (CCA):
Qty., rating for --18_C(0F)
One, 630
Battery voltage (DC) 12
Fuel
Fuel System
Fuel type Natural Gas, LPG, or
Dual Fuel
Fuel supply line inlet 1.5 NPTF
Natural gas fuel supply pressure, kPa
(in. H
2
O)
1.74--2.74 (7-11)
LPG vapor withdrawal fuel supply
pressure, kPa (in. H
2
O)
1.24--2.74 (5-11)
Dual fuel engine, LP vapor withdrawal
fuel supply pressure, kPa (in. H
2
O)
1.24 (5)
Fuel Composition Limits *
Nat. Gas LPG
Methane, % by volume 90 min. 1.2 max.
Ethane, % by volume 4.0 max. 10 max
Propane, % by volume 1.0 max. 96 max.
Propene, % by volume 0.1 max. 3 max.
C
4
and higher, % by volume 0.3 max. 3 max.
Sulfur, ppm mass 25 max. 25 max.
Lower heating value,
MJ/m
3
(Btu/ft
3
), min.
33.2 (890) 78.8 (2116)
* Fuels with other compositions may be acceptable. If your fuel is
outside the listed specifications, contact your local distributor for
further analysis and advice.