Overview#
The Cummins C100 D6 (model designation C100D6C) is a 100 kW standby diesel generator set built on the QSB5-G13 engine — a 4.5-liter, 4-cylinder turbocharged and charge-air-cooled industrial diesel running at 1800 rpm. Rated at 125 kVA standby and 113 kVA prime at 60 Hz, the C100D6C is the upper end of the QSB5 platform, sharing the same block, bore, and stroke as the C80D6C but rated for higher output.
Standard equipment includes the PowerCommand 2.3 control with AmpSentry protective relay, a high-ambient radiator capable of 50°C (122°F) ambient operation, and an aluminum sound-attenuated enclosure rated to withstand 180 mph wind loads per ASCE 7-10. The unit is UL 2200 listed, CSA certified, and IBC 2012 seismic certified. EPA Tier 3 emissions compliance applies to stationary emergency standby operation.
The C100D6C is available as a preconfigured generator set with or without a 260-gallon dual-wall sub-base fuel tank. It accepts full rated load in a single step per NFPA 110 for Level 1 systems.
Technical Specifications#
Power Ratings (60 Hz, 1800 rpm)
| Rating | kW | kVA |
|---|---|---|
| Standby (ESP) | 100 | 125 |
| Prime (PRP) | 90 | 113 |
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 | 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 standby rating)
| Load | Consumption |
|---|---|
| 50% load | 4.80 gph |
| 100% load | 8.90 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 | 1237 kg (2729 lbs) |
Control System — PowerCommand 2.3
PowerCommand 2.3 provides integrated voltage regulation, AmpSentry protective relay, PCCNet RS485 network interface, and a 320x240 graphic display. AmpSentry functions cover overcurrent warning and shutdown, over/under voltage, over/under frequency, field overload, reverse kW and VAR shutdown, and short circuit protection. Three-phase line-to-line digital voltage regulation with configurable torque matching is standard. InPower PC-based service tool supports detailed diagnostics and fault simulation.
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 C100D6C runs the same QSB5-G13 block as the C80D6C — a compact and well-supported 4-cylinder unit. At 100 kW the engine is working harder relative to its displacement, so we pay close attention to intake temperatures and charge air cooler condition on these units. Any signs of coolant contamination in the intake manifold are an immediate shutdown event. The PowerCommand 2.3 control's AmpSentry relay is well-suited for motor-starting loads typical in commercial buildings, but the trip curves should be confirmed against the actual connected load profile during commissioning. We also check alternator brushes and PMG exciter condition at annual service intervals on units that see frequent exercise cycles.
Frequently Asked Questions#
What is the difference between the C100 D6 and C100D6C? "C100 D6" is the commercial model family designation; "C100D6C" is the full Cummins model number. The "C" suffix indicates the QSB5 engine variant used in this configuration, as distinct from the C125D6C (also QSB5) or C125D6D (which uses the larger QSB7 engine).
What fuel tank size is available on the C100D6C? The preconfigured C100D6C is available with a 260-gallon dual-wall sub-base fuel tank (model A063P977) or without a tank (model A063P987) for integration with larger fuel infrastructure.
What control system does the C100 D6 use? Standard control is PowerCommand 2.3, which includes AmpSentry protective relay, PCCNet RS485 interface, 3-phase digital voltage regulation, and compatibility with the InPower diagnostic software tool. An upgrade to PowerCommand 2.3 with additional I/O is available.
Does the C100D6C qualify for NFPA 110 Level 1 standby power? Yes. The C100D6C bears the Cummins Prototype Test Support (PTS) mark, confirming it meets the prototype test requirements of NFPA 110 for Level 1 emergency power supply systems.
What is the operating temperature range? The C100D6C is designed to operate in ambient temperatures from -40°C to +50°C (-40°F to +122°F). Coolant heaters for cold weather starting below 4°C (40°F) and extreme cold below -18°C (0°F) are available as factory options.#
FAQ#
What is the standby rating of the Cummins C100 D6?#
The Cummins C100 D6 (model C100D6C) is rated at 100 kW standby / 125 kVA at 0.8 power factor, 60 Hz, 1800 rpm. Prime rating is 90 kW / 113 kVA.
What engine does the Cummins C100 D6 use?#
The C100 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. The QSB5-G13 is the same engine block used in the C80D6C, tuned for higher output at 100 kW.
What are the service intervals for the Cummins C100 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 C100 D6 EPA compliant?#
Yes. The C100D6C is EPA Tier 3 certified for stationary emergency standby applications under 40 CFR Part 60. This certification is appropriate for commercial standby installations throughout the United States.
Can the Cummins C100 D6 be paralleled?#
Yes. The PowerCommand 2.3 control system on the C100D6C supports paralleling with the phase-lock loop synchronizer and isochronous load sharing option. The PCCNet RS485 interface is standard. Contact a Cummins distributor for multi-unit paralleling configurations.
What fuel type does the Cummins C100 D6 use?#
The C100 D6 runs on diesel fuel. Ultra-low sulphur diesel (ULSD) is compatible. The QSB5-G13 supports biodiesel blends up to B20 per Cummins biodiesel approval guidelines.
What is the warranty on the Cummins C100 D6?#
Standard Cummins warranty is 2 years or 2,000 hours for standby applications. Extended warranty options are available through Cummins authorized dealers.
