Alpha Technologies AlphaGen PN-6x-T 7.5kW 48Vdc User Manual

Page 19

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042-288-B0-001, Rev. A2

19

1.0

System Overview, continued
1.5

Specifications, continued

48Vdc Generator Set Specification

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 rectifier)

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 Specifications, 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 filter 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

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