Alpha Technologies AlphaGen PN-6x-T 7.5kW 48VDC - Installation and Operation Manual - Manual (Page 18)

18 745-020-B0-003, Rev. C
1.0 System Overview, continued
1.4 Specifi cations, continued
Generator Set
Specifi cation 48VDC
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
* 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).
Generator
Specifi cations 48VDC
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
Engine Specifi cations Specifi cation
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)
Fuel Consumption at 7.5kW:
Natural Gas, 1000 BTU/ft.
3
Propane, 2516 BTU/ft. 3
150 cfh
50 cfh
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)