Overview#
The Cummins C1000 N6b is a 1000 kW (1250 kVA) standby natural gas generator set powered by the QSK60G -- a 60-liter, turbocharged and aftercooled spark-ignited gas engine. The unit is NFPA 110 Type 10 capable, accepting full rated load within 10 seconds of utility failure. It runs on natural gas or propane vapor and is equipped with PowerCommand controls providing isochronous governing and AmpSentry alternator protection.
At 1000 kW, the C1000 N6b enters the megawatt class of gas generators. It is deployed in hospitals, Tier III+ data centers, large campus environments, and industrial facilities where mission-critical backup power is required without the fuel storage, permitting, and environmental compliance burden of diesel generators at this scale.
Technical Specifications#
| Parameter | Value |
|---|---|
| Standby Rating | 1000 kW (1250 kVA) |
| Frequency | 60 Hz |
| Power Factor | 0.8 |
| Engine Model | QSK60G |
| Fuel Type | Natural gas / LPG |
| Cooling | Liquid |
| Aspiration | Turbocharged and aftercooled |
| Rated Speed | 1800 rpm |
| NFPA 110 | Type 10 |
| NG Fuel Consumption (Full Load) | ~10,000 CFH |
Our Service Experience#
The QSK60G is a large-frame gas engine that requires factory-trained technicians and specialized tooling. Spark plug replacement on the QSK60G is a multi-hour service event due to the high cylinder count and access requirements. The turbocharger system is critical to monitor -- boost pressure and shaft play inspections should be performed at every annual service. The catalytic converter (where fitted) requires periodic backpressure testing, as catalyst degradation at this power level can result in significant power derating.
Gas supply infrastructure for a 1000 kW gas generator is a significant engineering consideration. At approximately 10,000 CFH full-load consumption, the facility typically requires utility-grade gas service with dedicated metering, 4-inch minimum supply piping, and industrial-grade pressure regulation. Coordinate with the local gas utility early in the project -- service upgrades at this capacity level often have long lead times.
Frequently Asked Questions#
What engine does the C1000 N6b use? The Cummins QSK60G -- a 60-liter, turbocharged and aftercooled spark-ignited gas engine rated for 1000 kW standby at 1800 rpm.
What is NFPA 110 Type 10? NFPA 110 Type 10 requires full rated load acceptance within 10 seconds of utility failure. This is the standard for healthcare, data centers, and mission-critical facilities.
What are the service intervals? Oil and filter at 500 hours or 12 months. Air filter at 500 hours. Spark plugs at 1,000 hours. Major overhaul at 30,000 hours.
Can OnPoint Generators service the C1000 N6b in Northern California? Yes. OnPoint Generators maintains factory-trained staff for QSK60G gas engine service across the San Francisco Bay Area, Silicon Valley, and Northern California.
