Alpha Technologies AlphaGen PN-6x-T 7.5kW 48VDC - Technical Manual User Manual
Page 19
042-288-B0-001, Rev. A
19
1.0
System Overview, continued
1.5 Specifi cations, continued
48Vdc Generator Set Specifi cation
Manufacturer:
Kohler
Dimensions (in/mm):
21.5"L x 20"W x 21.8"H
546 x 508 x 554
Weight (lb/kg):
190/86
Rated* kW:
7.5
Rated Voltage:
(after rectifi er)
52 ± 0.5Vdc @ no load
Rated Amps:
144 @ 52Vdc
Stator Resistance:
(ohms)
0.024
Stator Type:
3-phase, 3-lead,
ungrounded
Excitation Method:
Permanent magnet,
brushless
Coupling Type:
Direct-to-Engine
Insulation (stator):
Class 180,
epoxy varnish,
vacuum-impregnated
Winding Material:
Copper
* Derate approximately 4% per 1000 ft (300m)
over 500 ft (153m) above sea level. Derate 1%
for each 10ºF (5.5ºC) increase in temperature
above 77ºF (25ºC).
Engine Specifi cations, PN-6x-T 7.5kW
Manufacturer:
Kohler
Make/model:
CH20
Cycle:
4
Compression Ratio:
8:5:1
Displacement, cu. in. (cc):
38 (624)
Rated Horsepower:
(using natural gas fuel)
13.1
Engine Speed (rpm):
2100-3450
Bore, in. (mm):
3.08 (77)
Stroke, in. (mm):
2.64 (67)
Valve Train:
Overhead valve
Valve Material:
Intake
Exhaust
Steel
Stellite
®
face
Number of Cylinders:
2
Cylinder Block Material:
Aluminum with cast iron liners
Cylinder Head Material:
Aluminum
Cylinder Head Tightening Torque,
ft. lb (Nm):
30 (41)
Piston Rings:
2 compression, 1 oil
Crankshaft Material:
Heat treated, ductile iron casting
Bearings:
Number
Type
2
Replaceable sleeve
Governor:
Electronic
Starter Motor:
Electric, 12Vdc, solenoid shift
Lubrication System:
Full pressure
Oil Capacity:
(with fi lter and cooler), qt. (L)
2 (1.9 )
Oil Filter Tightening Torque
1/2 turn
Oil Pressure, psi (kPa):
25-35 (172-241)
Low Oil Pressure, psi (kPa):
3.5±1.5 (24.1±13.8)
Fuel Type:
Natural gas or propane
Fuel Pressure, kPA (in. water):
7-11 (1.7-2.7)
Battery Voltage:
12Vdc
Battery Ground:
Negative
Battery Recommendation (min.):
585 CCA @ 0ºF ( -18ºC)
Spark Plug Type:
(Kohler P/N 24 132 02-S)
(Champion RC12YC)
Spark Plug Gap, in. (mm):
0.030 (0.75)
Spark Plug Tightening Torque, ft.
lb (Nm):
18-22 (24.4-29.8)
Ignition System:
Capacitive discharge
Cooling System:
Air cooled
High Engine Temperature, ºF (ºC):
305 (152)
Exhaust System:
USFS approved spark arrestor