Specifications
| Fuel | Natural Gas / Propane |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 625 kW |
| Standby kVA | 781 |
| Prime power | 565 kW |
| Controller | PowerCommand |
| Voltage options | 120/208 V, 120/240 V, 220/380 V, 127/220 V, 347/600 V, 139/240 V, 240/416 V, 254/440 V, 277/480 V |
| Phase | 3 |
| Power factor | 0.8 |
| Battery voltage | 24 V |
| Coolant capacity | 454 L |
| Max ambient | 40 °C |
| Dimensions (L×W×H) | 4737×2299×2819 mm |
| Dry weight | 8218 kg |
Engine
| Coolant capacity | 454.0 L |
|---|---|
| Displacement | 38.0 L |
| Aspiration | Spark ignited |
| Rated speed | 1500 rpm |
Maintenance & consumables
for the Cummins/Onan GTA38 G2| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | ||||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Oil | — | ||||
| Spark plug | — |
Service specifications
14| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Pressure | Maximum Air Cleaner Restriction | 15 | in H2O | |
| Pressure | Maximum Back Pressure | 2 | in Hg | |
| Pressure | Maximum Coolant Friction Head | 15 | psi | |
| Pressure | Maximum Coolant Static Head | 60 | ft | |
| Speed | Frequency Regulation | 5 | % | |
| Speed | Overspeed Limit | 2100 | rpm | |
| Speed | Piston Speed | 1875 | ft/min | |
| Speed | Random Frequency Variation | ±0.5 | % | |
| Speed | Rated Speed | 1500 | rpm | 50 Hz |
| Speed | Rated Speed | 1800 | rpm | 60 Hz |
| Temperature | Gas Temperature | 1350 | °F | |
| Temperature | Standard Temperature Rise | 125 | °C | standby |
| Voltage | Random Voltage Variation | ±1.0 | % | |
| Voltage | Voltage Regulation, No Load to Full Load | ±1.0 | % |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Fuel | Dry Processed Natural Gas | 905 BTU/ft³ L.H.V. | Running pressure to carburetor 5~7 in H2O; running pressure to engine mounted regulator 10~20 in H2O; minimum gas supply pipe size 2.0 in; gas supply filter pressure rating 100 psi (690 kPa) | ||
| Fuel | Propane (HD5) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Voltage reconnection
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| 120/208 | 3 | Three Phase Reconnectable | ||
| 120/240 | 1 | Single Phase Non-Reconnectable | ||
| 120/240 | 3 | Three Phase Reconnectable | ||
| 127/220 | 3 | Three Phase Reconnectable | ||
| 139/240 | 3 | Three Phase Reconnectable | ||
| 220/380 | 3 | Three Phase Reconnectable | ||
| 240/416 | 3 | Three Phase Non-Reconnectable | ||
| 254/440 | 3 | Three Phase Non-Reconnectable | ||
| 277/480 | 3 | Three Phase Non-Reconnectable | ||
| 347/600 | 3 | Three Phase Reconnectable |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What is the power rating of the Cummins/Onan GFJB?
The Cummins/Onan GFJB is rated 625 kW standby (781.0 kVA).
What engine does the Cummins/Onan GFJB use?
The Cummins/Onan GFJB is powered by the Cummins/Onan GTA38 G2 engine.
What kind of fuel does the Cummins/Onan GFJB run on?
The Cummins/Onan GFJB runs on Natural Gas / Propane.
Available documents
Spec sheet — GTA38G2GFJB (Cummins/Onan)