Overview#
The Cummins C1540 N6c is a 1540 kW (1925 kVA) standby natural gas generator set powered by the QSV91G -- a 91-liter, turbocharged and aftercooled spark-ignited gas engine at its top-end standby rating. The unit runs on natural gas or propane vapor and is equipped with PowerCommand controls providing isochronous governing and AmpSentry alternator protection.
At 1540 kW, the C1540 N6c represents the maximum output of the QSV91G gas platform. For applications requiring more than 1540 kW from a single unit, the next step up is the HSK78G engine platform (C1750 N6cb and C2000 N6c). The C1540 N6c serves hospitals, Tier III+ data centers, large campus environments, and industrial facilities.
Technical Specifications#
| Parameter | Value |
|---|---|
| Standby Rating | 1540 kW (1925 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) | ~15,400 CFH |
Our Service Experience#
The QSV91G at the 1540 kW rating operates at maximum output, making engine tuning, air-fuel calibration, and gas pressure regulation absolutely critical. Any deviation from specification directly impacts reliability and power quality. We verify turbocharger boost pressure, exhaust backpressure, and dynamic gas inlet pressure at every annual service.
Gas supply infrastructure at 1540 kW is a major project consideration. At approximately 15,400 CFH, the facility needs utility-grade gas service with dedicated industrial metering and large-diameter supply piping. Coordinate with the local gas utility during early project planning -- service upgrades at this capacity level often have long lead times.
Frequently Asked Questions#
What engine does the C1540 N6c use? The Cummins QSV91G at its top-end gas rating -- a 91-liter, turbocharged and aftercooled spark-ignited engine rated for 1540 kW standby at 1800 rpm.
What is the standby rating of the C1540 N6c? 1540 kW (1925 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 C1540 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.
