Overview#
The Cummins C80 D6 (model designation C80D6C) is an 80 kW standby diesel generator set built on the QSB5-G13 engine platform — a 4.5-liter, 4-cylinder turbocharged and charge-air-cooled industrial diesel. Rated at 100 kVA standby and 90 kVA prime at 60 Hz, the C80D6C is designed for commercial and light-industrial standby applications where reliability and sound attenuation are priorities.
Standard equipment includes the PowerCommand 2.3 control with AmpSentry protective relay, a high-ambient radiator rated for 50°C (122°F) ambient operation, and an aluminum sound-attenuated enclosure evaluated to withstand 180 mph wind loads per ASCE 7-10. The generator set is UL 2200 listed and certified to IBC 2012 seismic standards. EPA Tier 3 emissions compliance makes it suitable for stationary emergency standby applications throughout North America.
The C80D6C accepts full rated load in a single step per NFPA 110 for Level 1 systems, and a dual-wall sub-base fuel tank is available as an option for extended runtime without a separate day tank.
Technical Specifications#
Power Ratings (60 Hz, 1800 rpm)
| Rating | kW | kVA |
|---|---|---|
| Standby (ESP) | 80 | 100 |
| Prime (PRP) | 72 | 90 |
Engine — Cummins QSB5-G13
| Parameter | Value |
|---|---|
| Displacement | 4.5 L (272 in³) |
| Configuration | Cast iron, inline 4-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 | 850 amps per battery at 0°C (32°F) |
| Lube oil filter | Spin-on with relief valve |
Fuel Consumption (60 Hz standby rating)
| Load | Consumption |
|---|---|
| 50% load | 4.00 gph |
| 100% load | 7.30 gph |
Physical (Sound Level 1 enclosure)
| Dimension | Value |
|---|---|
| Length | 3016 mm (119 in) |
| Width | 1016 mm (40 in) |
| Height | 1473 mm (58 in) |
| Wet weight | 1185 kg (2614 lbs) |
Control System — PowerCommand 2.3
PowerCommand 2.3 is standard, providing integrated voltage regulation, engine protection, AmpSentry protective relay, PCCNet RS485 interface, and a 320x240 pixel graphic LED backlight display. AmpSentry protective relay functions include overcurrent warning and shutdown, over/under voltage, over/under frequency, field overload, reverse kW and VAR shutdown, and short circuit protection. Digital voltage regulation uses 3-phase line-to-line sensing with configurable torque matching.
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 C80D6C is one of the more forgiving Cummins commercial units to service — the QSB5 engine has a compact footprint and accessible service points, and the PowerCommand 2.3 control's InPower PC-based diagnostic tool simplifies fault history review and data logging. That said, we pay close attention to the charge air cooler on these units. Any signs of coolant in the intake or white smoke at startup warrant immediate investigation; a failed charge air cooler core can quickly cause hydrostatic lock damage on a 4-cylinder engine. Battery condition is the other routine concern — the PC 2.3 control performs smart battery testing, and weak-battery warnings should not be deferred. A failed 10-second start sequence in an NFPA 110 Level 1 application is a compliance event.
Frequently Asked Questions#
What is the fuel tank capacity on the C80D6C? The preconfigured C80D6C (model A063P967) includes a 260-gallon dual-wall sub-base fuel tank, providing approximately 35 hours of runtime at full standby load. The no-tank version (A063P969) is available for installations with separate fuel infrastructure.
What voltages does the C80 D6 support? The C80D6C alternator supports 120/240V single-phase and three-phase configurations including 120/208V, 120/240V, 277/480V, and 347/600V. A reconnectable full 1-phase output alternator is available as an option.
What is the emissions compliance status of the C80 D6? The C80D6C is EPA Tier 3 certified for stationary emergency standby applications under 40 CFR Part 60. Tier 3 compliance is appropriate for most commercial standby applications in the United States. If your project requires Tier 4 Final emissions, Cummins' newer commercial diesel product line (C80D6T or similar) should be specified.
Does the C80 D6 meet NFPA 110 requirements? Yes. The C80D6C accepts full rated load in a single step in accordance with NFPA 110 for Level 1 systems. This is verified through the Cummins Prototype Test Support (PTS) program.
What is the warranty on the C80D6C? Base warranty is 2 years / 400 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.#
FAQ#
What is the standby rating of the Cummins C80 D6?#
The Cummins C80 D6 (model C80D6C) is rated at 80 kW standby / 100 kVA at 0.8 power factor, 60 Hz, 1800 rpm. Prime rating is 72 kW / 90 kVA.
What engine does the Cummins C80 D6 use?#
The C80 D6 uses the Cummins QSB5-G13 — a 4.5-liter, inline-4-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 C80 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 C80 D6 EPA compliant?#
Yes. The C80D6C is EPA Tier 3 certified for stationary emergency standby applications under 40 CFR Part 60. This certification is sufficient for commercial standby installations throughout the United States.
Can the Cummins C80 D6 be paralleled?#
Yes. The standard PowerCommand 2.3 control includes a PCCNet RS485 interface and supports paralleling configurations. For genset-to-genset paralleling with isochronous load sharing, the PowerCommand 2.3 upgrade with phase-lock loop synchronizer is required. Consult a Cummins distributor for paralleling configurations.
What fuel type does the Cummins C80 D6 use?#
The C80 D6 runs on diesel fuel. Ultra-low sulphur diesel (ULSD) is compatible. The QSB5-G13 engine is compatible with biodiesel blends up to B20 in accordance with Cummins biodiesel approval guidelines.
What is the warranty on the Cummins C80 D6?#
Standard Cummins warranty is 2 years or 2,000 hours for standby applications. Extended warranty options of 3 and 5 years are available through Cummins authorized dealers.
