Cummins · Cummins Centum Series

Cummins C1500 D6e

1500 kW standby / 1365 kW prime · Diesel · Liquid-cooled

1500 kW Centum Series diesel standby generator with QSK38 engine. PowerCommand 3.3 controller, charged air-cooled intake, smaller footprint, single-source Cummins integration for data center and mission-critical applications.

Cummins Cummins C1500 D6e generator — specifications and details
Standby power
1500 kW / 1365 kW prime
Voltage options
277/480V, 346/600V, 4160V
Frequency / Phase
60 Hz · 3-phase
Engine
Cummins QSK38
EPA / Emissions
Tier 2
Data CentersHealthcareparalleling-arrayCommercial
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Overview#

The Cummins C1500 D6e is a 1500 kW standby diesel generator set from the Centum Series -- Cummins' premium platform for data center and mission-critical applications. Powered by the QSK38 diesel engine at its peak output, the C1500 D6e delivers 1.5 MW of standby power in a smaller footprint than traditional D6 gensets, with charged air-cooled intake and the PowerCommand 3.3 controller.

At 1500 kW, the C1500 D6e represents the maximum output of the QSK38 engine within the Centum platform. This makes it an efficient building block for data center paralleling arrays -- five units deliver 7.5 MW of total standby capacity. The Centum's single-source Cummins integration simplifies procurement, commissioning, and long-term maintenance compared to multi-vendor genset configurations.

The PowerCommand 3.3 controller provides advanced paralleling, load management, and BMS integration via Modbus, BACnet, and SNMP protocols. Charged air-cooled intake maintains consistent performance across ambient temperature ranges. Fuel consumption runs approximately 105 gallons per hour at full rated load.

Engineering specifications

Fuel system & runtime

Fuel use @ full load
105 GPH
Fuel use @ 75% load
79 GPH
Fuel use @ 50% load
55 GPH

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Estimate runtime for the Cummins C1500 D6e

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

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Estimated runtime

2.5 hours(0.1 days)

Fuel consumption ≈ 81.00 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 C1500 D6e 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—moderate
Charged air-cooled intake systemCharge air cooler leaks, reduced boost efficiency, intake temperature rise—moderate
Cooling systemCoolant temperature exceedances, system pressure loss—severe
PowerCommand 3.3 controllerCommunication faults, sensor input errors, firmware update requirements—minor
Starting system (24V battery bank)Slow crank, failed start on infrequently exercised units—minor

Frequently Asked Questions

What engine does the C1500 D6e use?
The C1500 D6e uses the Cummins QSK38 diesel engine with MCRS fuel injection. At 1500 kW, this model operates at the top of the QSK38 power band within the Centum Series platform.
What are the standby and prime ratings of the C1500 D6e?
Standby rating is 1500 kW (1875 kVA) at 60 Hz, 0.8 power factor. Prime rating is 1365 kW (1706 kVA). Both at 1800 rpm, 60 Hz, three-phase.
How does the Centum C1500 D6e differ from the standard C1500 D6?
The Centum C1500 D6e features a smaller physical footprint, charged air-cooled intake, and the advanced PowerCommand 3.3 controller. The standard C1500 D6 uses the traditional D6 platform design. Both deliver 1500 kW standby, but the Centum is purpose-built for modern data center requirements with tighter integration and digital connectivity.
What are the service intervals for the C1500 D6e?
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.
Can PowerGen service the C1500 D6e in Northern California?
Yes. PowerGen provides authorized Cummins service for Centum Series generators across the San Francisco Bay Area and Northern California. The Centum platform uses standard Cummins engines and components, serviced with INSITE diagnostics by our factory-trained technicians.

Compatible equipment

Transfer switches

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