The Cummins Onan DFBF generator is listed with standby output of 275 kW, Diesel fuel, 60 Hz operation, 275 V output, and Single phase.
Generator • Diesel • 60 Hz • Single phase
Key specifications
Useful generator charts
Charts are shown only when this model has enough usable source data.
37.9 kW
45.1 kW
275 kW
250 kW
How the Cummins Onan DFBF compares
This compares the supplied numeric specification with Cummins Onan generators in the same broad standby-power class where enough comparable data exists.
About 18% above the similar-output Cummins Onan average. Around the 69th percentile for this field.
About 22% above the similar-output Cummins Onan average. Around the 77th percentile for this field.
About 38% above the similar-output Cummins Onan average. Around the 89th percentile for this field.
Generator information
| Manufacturer | Cummins Onan |
|---|---|
| Model | DFBF |
| Generator type | Generator |
| Fuel | Diesel |
| Frequency | 60 Hz |
Electrical output
| Standby power | 275 kW |
|---|---|
| Prime power | 250 kW |
| Standby kVA | 344.0 |
| Voltage options | 275 V |
| Phase | Single phase |
| Power factor | 0.8 |
Engine, cooling and controls
| Engine model | Cummins/Onan NT855-G6 |
|---|---|
| Engine displacement | 854 cu in (14 L) |
| Aspiration / cooling | turbocharged |
| Rated engine speed | 1800 rpm |
| Engine oil capacity | 10.6 gal (40 L) |
| Engine coolant capacity | 17 gal (64.4 L) |
| Oil capacity | 10.6 gal (40 L) |
| Coolant capacity | 17 gal (64.4 L) |
| Maximum ambient | 104 °F (40 °C) |
| Controller | PowerCommand, PowerCommand 2100, PowerCommand 3100, PowerCommand 3100 (PCC) |
Physical specifications
| Dry weight | 7, 251 lb (3, 289 kg) |
|---|---|
| Dimensions (L × W × H) | 142 × 50 × 63.6 in (3607 × 1270 × 1615 mm) |
Battery
| Battery group | 8D |
|---|---|
| Battery cranking | 975 CCA |
| Battery voltage | 12 V |
| Battery quantity | 2 |
Fuel system and runtime
| Fuel tank | 11.1 gal (42 L) |
|---|
Fuel consumption
| Standby | 6.9 gal/h (77.3 L/h) @ 1%; 20.4 gal/h @ 100% |
|---|---|
| Prime | 25 gal/h @ 1% |
Maintenance and service parts
| Engine oil | Interval: 100 hr; Capacity: 42.0 gallons |
|---|---|
| Oil filter | Interval: 1000 hr |
| Fuel filter | Interval: 500 hr |
| Air filter | Interval: 1000 hr; Specification: If the engine is equipped with an oil bath type air cleaner, fill to the level indicated with oil of the same viscosity as used in the crankcase. However, a non-detergent (straight mineral) oil is recommended. |
| Coolant | Interval: 5000 hr; Specification: For units which use either a radiator or heat exchanger (city water cooled), fill the cooling system with clean soft water, The standard radiator and block capacity is 21 U.S. gallons. Use a good rust and scale inhibitor. If there is any possibility of a radiator cooled plant being exposed to freezing temperatures, use antifreeze with ethylene glycol base as instructed in the Cummins manual.; Capacity: 80.63 L |
Disclaimer: Specifications should be verified against the official owner’s or service manual and confirmed on the Cummins North America generator website.