Overview#
The Cummins C1400 N6c is a 1400 kW (1750 kVA) standby natural gas generator set powered by the QSV91G -- a 91-liter, turbocharged and aftercooled spark-ignited gas engine. The QSV91G is one of the largest dedicated gas engines in the Cummins portfolio, providing the displacement and robustness required for reliable high-capacity gas standby operation. The unit runs on natural gas or propane vapor and is equipped with PowerCommand controls.
The C1400 N6c serves megawatt-class standby applications in hospitals, Tier III+ data centers, large campus environments, and industrial facilities. At 1400 kW, it provides substantial emergency capacity while avoiding the fuel storage, permitting, and environmental compliance requirements associated with diesel generators at this scale.
Technical Specifications#
| Parameter | Value |
|---|---|
| Standby Rating | 1400 kW (1750 kVA) |
| Frequency | 60 Hz |
| Power Factor | 0.8 |
| Engine Model | QSV91G |
| Fuel Type | Natural gas / LPG |
| Cooling | Liquid |
| Aspiration | Turbocharged and aftercooled |
| Rated Speed | 1800 rpm |
| NG Fuel Consumption (Full Load) | ~14,000 CFH |
Our Service Experience#
The QSV91G is a large-frame, high-cylinder-count gas engine requiring experienced technicians and specialized tooling. Spark plug replacement is a significant planned maintenance event due to cylinder count and access requirements. The turbocharger system requires annual inspection. Catalytic converter backpressure monitoring is essential at this power level.
Gas supply infrastructure at 1400 kW is a major engineering consideration. At approximately 14,000 CFH, the facility needs utility-grade gas service with dedicated industrial metering and appropriately sized supply piping. Coordinate with the local gas utility early in the project.
Frequently Asked Questions#
What engine does the C1400 N6c use? The Cummins QSV91G -- a 91-liter, turbocharged and aftercooled spark-ignited gas engine rated for 1400 kW standby at 1800 rpm.
What is the standby rating of the C1400 N6c? 1400 kW (1750 kVA) at 60 Hz, 0.8 power factor. Emergency Standby Power (ESP) rating.
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 C1400 N6c in Northern California? Yes. OnPoint Generators maintains factory-trained staff for QSV91G gas engine service across the San Francisco Bay Area, Silicon Valley, and Northern California.
