Spec Sheet
G4-270 (14RCA) 5/ 21d
Alternator Specifications
Alternator Specifications
Specifications Alternator
Manufacturer Kohler
Type 2-Pole, Rotating Field
Leads, quantity
2F5 4
2G5 12
Voltage regulator Digital
Insulation: NEMA MG1-1.66
Material Class H
Temperature rise
130C Standby
Bearing: quantity, type 1, Sealed
Coupling Direct
Amortisseur windings Full
Voltage regulation, no-load to full-load RMS ±1.0%
One-step load acceptance 100% of Rating
Peak motor starting kVA: (35% dip for voltages below)
240V, 1 ph 2F5 (4 lead) 33 (60 Hz)
240 or 480 V, 3 ph 2G5 (12 lead) 54 (60 Hz)
Alternator Features
Compliance with NEMA, IEEE, and ANSI standards for
temperature rise.
Self-ventilated and dripproof construction.
Windings are vacuum-impregnated with epoxy varnish for
dependability and long life.
Superior voltage waveform and minimum harmonic
distortion from skewed alternator construction.
Digital voltage regulator with ±1.0% no-load to full-load
RMS regulation.
Rotating-field alternator with static exciter for excellent
load response.
Total harmonic distortion (THD) from no load to full load with
a linear load is less than 5%.
Application Data
Engine
Engine Specifications
Manufacturer Kohler
Engine: model, type CH740 4-Cycle
Cylinder arrangement V-2
Displacement, cm
3
(cu. in.) 725 (44)
Bore and stroke, mm (in.) 83 x 67 (3.27 x 2.64)
Compression ratio 9:1
Main bearings: quantity, type 2, PTO Side-Load Sleeve
Bearings
Rated RPM
60 Hz 3600
Max. engine power at rated rpm, kW (HP)
LPG, 60 Hz 17.6 (23.6)
Natural gas, 60 Hz 15.3 (20.5)
Cylinder head material Aluminum
Valve material
Steel/Stellite
Piston type and material Aluminum Alloy
Crankshaft material Heat Treated, Ductile Iron
Governor: type Electronic
Frequency regulation, no load to full load Isochronous
Frequency regulation, steady state ±0.5%
Air cleaner type Dry
Engine Electrical
Engine Electrical System
Ignition system Electronic,
Capacitive Discharge
Starter motor rated voltage (DC) 12
Battery (purchased separately):
Ground Negative
Volts (DC) 12
Battery quantity 1
Recommended cold cranking amps:
(CCA) rating for - 18C (0F) 500
Group size 51
Exhaust
Exhaust System
Exhaust temperature exiting the
enclosure at rated kW, dry, C (F)
260 (500)
Lubrication
Lubricating System
Type Full Pressure
Oil capacity (with filter), L (qt.) 1.8 (1.9)
Oil filter: quantity, type
1, Cartridge
Oil cooler Integral
Kohler recommends the use of Kohler Genuine oil and filters.
Fuel Pipe Size
Minimum Gas Pipe Size Recommendation, in. NPT
Pipe Length, m (ft.)
Natural Gas
193,000 Btu/hr.
LPG
203,000 Btu/hr.
8 (25) 3/4 3/4
15 (50) 1 3/4
30 (100) 1 1
46 (150) 1 1/4 1
61 (200) 1 1/4 1