Cummins Onan C1250 D5A Specs (Power | Fuel Consumption)

The Cummins Onan C1250 D5A generator is listed with standby output of 1000 kW, Diesel fuel, 50 Hz operation, 380 V, 415 V output, and Wye / 3 Phase.

Cummins Onan Generator Specifications

Generator • Diesel • 50 Hz • Wye / 3 Phase

Standby power: 1000 kWVoltage options: 380 V, 415 VDry weight: 18,032 lb (8,179 kg)

Key specifications

1000 kW Standby power

Diesel Fuel

380 V, 415 V Voltage options

Wye / 3 Phase Phase

18,032 lb (8,179 kg) Dry weight

50 Hz Frequency

Useful generator charts

Charts are shown only when this model has enough usable source data.

Power-to-weight

Standby output per 1,000 lb of dry weight versus similar-output Cummins Onan models.

This model

55.5 kW

Peer average

55.6 kW

68th percentile

Power output

Low 900 kW High 1,000 kW

Standby

1,000 kW

Prime

900 kW

Model spec snapshot

Representative numeric specifications from this generator.

1,000 kWStandby

18,031.61 lbWeight

How the Cummins Onan C1250 D5A compares

This compares the supplied numeric specification with Cummins Onan generators in the same broad standby-power class where enough comparable data exists.

Standby power

1,000 kW

45% below avg

4th percentile

Dry weight

18,032 lb

40% below avg

22nd percentile

Oil capacity

30.12 gal

42% below avg

31st percentile

Standby power1,000 kW

Low 1,000 kWAverage 1,831.9 kWHigh 3,562 kW

About 45% below the similar-output Cummins Onan average. Around the 4th percentile for this field.

Dry weight18,032 lb

Low 71 lbAverage 30,152 lbHigh 65,094 lb

About 40% below the similar-output Cummins Onan average. Around the 22nd percentile for this field.

Oil capacity30.12 gal

Low 0.28 galAverage 51.88 galHigh 105.14 gal

About 42% below the similar-output Cummins Onan average. Around the 31st percentile for this field.

This model Peer average

Generator information

Manufacturer	Cummins Onan
Model	C1250 D5A
Generator type	Generator
Fuel	Diesel
Frequency	50 Hz

Electrical output

Standby power	1000 kW
Prime power	900 kW
Standby kVA	1250.0
Voltage options	380 V, 415 V
Phase	Wye / 3 Phase
Power factor	0.8

Engine, cooling and controls

Engine model	Cummins/Onan KTA38-G9
Engine displacement	2, 307 cu in (37.8 L)
Aspiration / cooling	turbocharged, aftercooled
Rated engine speed	1500 rpm
Engine oil capacity	30.1 gal (114 L)
Oil capacity	30.1 gal (114 L)
Coolant capacity	88.8 gal (336 L)
Maximum ambient	104 °F (40 °C)
Controller	PowerCommand
Alternator	P7A

Physical specifications

Dry weight	18, 032 lb (8, 179 kg)
Dimensions (L × W × H)	185.9 × 70.3 × 88.2 in (4722 × 1785 × 2241 mm)

Fuel consumption

Standby	20.9 L/h @ 0%
Prime	79 gal/h @ 0%

Disclaimer: Specifications should be verified against the official owner’s or service manual and confirmed on the Cummins North America generator website.