Cummins · Cummins D6 Commercial Diesel

Cummins C2250 D6

2250 kW standby / 2050 kW prime · Diesel · Liquid-cooled

2250 kW diesel standby generator with QSK60 60L V-16 engine. PowerCommand control, liquid-cooled, for data center, industrial, and mission-critical standby applications.

Cummins Cummins C2250 D6 generator — specifications and details
Standby power
2250 kW / 2050 kW prime
Voltage options
277/480V, 346/600V, 4160V, 12470V, 13800V
Frequency / Phase
60 Hz · 3-phase
Engine
Cummins QSK60 · 60L
EPA / Emissions
Tier 2
Data CentersManufacturingCommercialparalleling-arrayutility
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Overview#

The Cummins C2250 D6 is a 2250 kW standby diesel generator set powered by the QSK60 -- a 60-liter, V-16 diesel engine with Modular Common Rail fuel injection (MCRS). Rated at 2813 kVA standby and 2563 kVA prime at 60 Hz, the C2250 D6 sits in the middle of the QSK60 mega-diesel lineup, offering a balance between output and thermal headroom.

The QSK60 platform is one of the most widely deployed mega-diesel engines in the standby power market. At 2250 kW, this genset provides a useful step between the 2000 kW and 2500 kW models, allowing engineers to right-size standby capacity without over-specifying. Full Cummins vertical integration covers engine, alternator, PowerCommand controls, and cooling system.

Medium-voltage output options (4160V, 12470V, 13800V) support utility-grade paralleling bus architectures. PowerCommand 2.3/3.3 controllers enable multi-genset arrays for facilities requiring 4-20+ MW of redundant standby capacity. Fuel consumption runs approximately 158 gallons per hour at full rated load.

Engineering specifications

Fuel system & runtime

Fuel use @ full load
158 GPH
Fuel use @ 75% load
118 GPH
Fuel use @ 50% load
82 GPH

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Estimate runtime for the Cummins C2250 D6

Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.

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Estimated runtime

1.6 hours(0.1 days)

Fuel consumption ≈ 121.89 GPH at 75% load. Estimate based on industry-typical 1800 RPM standby curves (≈0.07 GPH/kW at full load). Actual consumption varies by engine, ambient temperature, fuel quality, and tuning.

Service intervals

Manufacturer-recommended intervals for the Cummins C2250 D6 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.

Oil & filter
Every 500 hours or 12 months
Air filter
Every 1000 hours
Fuel filter
Every 500 hours
Major overhaul
≈ 40,000 hours

Common failure modes

What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.

ComponentSymptomTypical hoursSeverity
Fuel injection system (MCRS)Injector fault codes, rough running, power imbalance between banks—moderate
Turbocharger system (dual turbo)Reduced boost pressure, excessive exhaust smoke, turbo bearing wear—moderate
Cooling system (V-16 dual-circuit)Coolant temperature exceedances, radiator capacity issues at high ambient—severe
Fuel quality / tank degradationFilter clogging, hard starting, injector fouling from stagnant fuel—moderate
Starting system (24V battery bank)Slow crank, failed start on infrequently exercised units—minor

Frequently Asked Questions

What engine does the Cummins C2250 D6 use?
The C2250 D6 uses the Cummins QSK60 -- a 60-liter, V-16 diesel engine with MCRS fuel injection. This is the same engine platform as the C2000 D6 and C2500 D6, calibrated for 2250 kW standby output.
What are the standby and prime ratings of the C2250 D6?
Standby rating is 2250 kW (2813 kVA) at 60 Hz, 0.8 power factor. Prime rating is 2050 kW (2563 kVA). Both at 1800 rpm, 60 Hz, three-phase.
What are the service intervals for the C2250 D6?
Oil and filter changes are due at 500 hours or 12 months. Air filter replacement at 1,000-hour intervals. Fuel filter at 500 hours. Coolant flush at 6,000 hours. Major overhaul interval is 40,000 hours under standard standby duty conditions.
How does the C2250 D6 compare to the C2500 D6?
Both use the QSK60 (60L, V-16) engine. The C2500 D6 operates at the top of the QSK60 power band at 2500 kW, while the C2250 D6 runs at a mid-range calibration that provides slightly more headroom and thermal margin.
Can OnPoint Generators service the C2250 D6 in Northern California?
Yes. OnPoint Generators provides authorized Cummins service for mega-diesel generators across the San Francisco Bay Area and Northern California. V-16 engines require specialized tooling and attention to bank-to-bank balance. We use Cummins INSITE diagnostics for every QSK60 service.

Compatible equipment

Transfer switches

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