Overview#
The Cummins C150 D6 (model designation C150D6D) is a 150 kW standby diesel generator set powered by the QSB7-G5 engine — a 6.7-liter, inline-6 turbocharged and charge-air-cooled industrial diesel. Rated at 188 kVA standby and 169 kVA prime at 60 Hz, the C150D6D represents the entry point to the QSB7 engine platform, which spans from 125 kW to 200 kW in the Cummins D6 commercial lineup.
The C150D6D ships with PowerCommand 1.1 control, a high-ambient radiator rated for 50°C (122°F) continuous operation, and an aluminum sound-attenuated enclosure rated for 180 mph wind loads (ASCE 7-10). It is UL 2200 listed, IBC 2012 seismic certified, and meets NFPA 110 Level 1 requirements by accepting full rated load in a single step. Dual-wall sub-base fuel tank options are available for sites requiring extended runtime without a separate fuel system.
Technical Specifications#
Power Ratings (60 Hz, 1800 rpm)
| Rating | kW | kVA |
|---|---|---|
| Standby (ESP) | 150 | 188 |
| Prime (PRP) | 135 | 169 |
Engine — Cummins QSB7-G5
| Parameter | Value |
|---|---|
| Displacement | 6.7 L (408 in³) |
| Configuration | Cast iron, inline 6-cylinder |
| Bore x Stroke | 107 mm x 124 mm |
| Aspiration | Turbocharged and charge air cooled |
| Rated speed | 1800 rpm |
| Emissions | EPA Tier 3 |
| Starting voltage | 2x 12V in parallel, negative ground |
| Battery capacity | 2x 850 amps per battery at 0°C (32°F) |
| Battery charging alternator | 100 amps |
| Lube oil filter | Spin-on with relief valve |
Fuel Consumption (60 Hz)
| Load | Consumption |
|---|---|
| 50% load | ~5.3 gph |
| 100% standby | ~10.6 gph |
Physical (Open set)
| Dimension | Value |
|---|---|
| Length | 2867 mm (113 in) |
| Width | 1016 mm (40 in) |
| Height | 1415 mm (56 in) |
| Wet weight (open set) | 1470 kg (3240 lbs) |
Sound Level 1 enclosure: 3621 mm (143 in) L x 1016 mm (40 in) W x 1836 mm (72 in) H, wet weight 1649 kg (3635 lbs).
Control System — PowerCommand 1.1
Standard PowerCommand 1.1 provides automatic remote start/stop, isochronous frequency regulation (±0.5%), voltage regulation ±1.0%, alarm and status display, output metering, and NFPA 110 Level 1 compliance. Upgrade to PowerCommand 2.3 with AmpSentry is available as a factory option. RS485 Modbus interface is standard; InPower PC-based service tool is available.
Alternator
| Parameter | Value |
|---|---|
| Design | Brushless, 4-pole, drip-proof, revolving field |
| Stator winding | 2/3 pitch |
| Rotor | Direct coupled, flexible disc |
| Insulation | Class H per NEMA MG1-1.65 |
| Temperature rise | 120°C standby |
| THD voltage | < 5% no load to full linear load |
| Excitation | Torque match (shunt); PMG optional |
Our Service Experience#
The QSB7-G5 platform is one of the most common engines in the 100-200 kW commercial standby segment, and parts availability is generally excellent. Fuel injection components deserve close attention — the QSB7 uses a high-pressure common rail system, and contaminated or degraded fuel will accelerate injector wear. We recommend fuel polishing on any unit that hasn't been exercised on load for more than six months. The charge air cooler is the most consequential failure point: any coolant ingestion into the intake will require immediate engine inspection. The C150D6D also sees more connector and harness issues on outdoor installations in humid climates — we inspect the PC 1.1 control board connectors at every annual service.
Frequently Asked Questions#
What is the difference between the C150D6D and C125D6D? Both use the QSB7-G5 engine, but the C150D6D is rated for 150 kW standby / 135 kW prime versus 125 kW standby / 113 kW prime. The physical dimensions and weight are identical — the rating difference is achieved through ECM calibration and governor settings on the same engine block.
What enclosure options are available for the C150D6D? Four configurations are available: open skid, weather protective enclosure, Sound Level 1 attenuated enclosure, and Sound Level 2 attenuated enclosure. The Sound Level 1 and Level 2 enclosures are both aluminum construction with a sandstone or green powder coat finish.
Does the C150 D6 require three-phase power to operate? No. The C150D6D alternator is available in single-phase 120/240V and multiple three-phase voltage configurations including 120/208V, 277/480V, and 347/600V. A reconnectable full 1-phase output alternator is also available as an option.
What is the warranty on the C150D6D? Base warranty is 2 years / 1000 hours for standby applications, or 1 year / unlimited hours for prime power. Three-year and five-year extended standby warranty options are available through Cummins dealers.
Can the C150D6D be installed outdoors? Yes. The sound-attenuated aluminum enclosure is rated for outdoor installation and has been evaluated to withstand 180 mph wind loads per ASCE 7-10. The enclosure meets IBC 2012 seismic certification requirements as well.
FAQ#
What is the standby rating of the Cummins C150 D6?#
The Cummins C150 D6 (model C150D6D) is rated at 150 kW standby / 188 kVA at 0.8 power factor, 60 Hz, 1800 rpm. Prime rating is 135 kW / 169 kVA.
What engine does the Cummins C150 D6 use?#
The C150 D6 uses the Cummins QSB7-G5 — a 6.7-liter, inline-6-cylinder, turbocharged and charge-air-cooled diesel engine rated at 1800 rpm. It is EPA Tier 3 certified for stationary emergency standby applications.
What are the service intervals for the Cummins C150 D6?#
Oil and filter changes are due at 500 hours or 12 months, whichever comes first. Air filter and fuel filter replacement are scheduled at 500-hour intervals. Coolant flush is recommended at 4,000 hours. Major overhaul interval is 20,000 hours under standard standby duty conditions.
Is the Cummins C150 D6 EPA compliant?#
Yes. The C150D6D is EPA Tier 3 certified for stationary emergency standby applications under 40 CFR Part 60. This is appropriate for commercial standby installations throughout the United States. It is UL 2200 listed and IBC 2012 seismic certified.
Can the Cummins C150 D6 be paralleled?#
Yes. The standard PowerCommand 1.1 control includes RS485 Modbus interface. An upgrade to PowerCommand 2.3 with phase-lock loop synchronizer enables genset-to-genset isochronous load sharing for multi-unit paralleling. Consult a Cummins distributor for paralleling configurations.
What fuel type does the Cummins C150 D6 use?#
The C150 D6 runs on diesel fuel. Ultra-low sulphur diesel (ULSD) is compatible. The QSB7-G5 engine supports biodiesel blends up to B20 per Cummins biodiesel approval guidelines.
What is the warranty on the Cummins C150 D6?#
Standard Cummins warranty is 2 years or 2,000 hours for standby applications. Extended warranty options are available through Cummins authorized dealers.
