Overview#
The Cummins C200 D6 (model designation C200D6D) is a 200 kW standby diesel generator set powered by the QSB7-G5 — the same 6.7-liter, inline-6 turbocharged and charge-air-cooled engine used in the C150D6D and C175D6D. Rated at 250 kVA standby and 225 kVA prime at 60 Hz, the C200D6D is the highest-output configuration of the QSB7 platform in the Cummins D6 commercial lineup.
The C200D6D delivers full rated standby power from a compact platform — the physical footprint is identical to the C150D6D and C175D6D, meaning the 200 kW rating represents maximum ECM calibration and governor tuning of the QSB7 engine. This makes it an attractive choice for facilities upgrading from lower-kW units where space is constrained. The generator set is UL 2200 listed, IBC 2012 seismic certified, EPA Tier 3 compliant, and meets NFPA 110 Level 1 requirements.
Standard equipment includes PowerCommand 1.1 control, a high-ambient radiator for 50°C (122°F) operation, dual-wall sub-base fuel tank options, and an aluminum sound-attenuated enclosure rated for 180 mph wind loads per ASCE 7-10.
Technical Specifications#
Power Ratings (60 Hz, 1800 rpm)
| Rating | kW | kVA |
|---|---|---|
| Standby (ESP) | 200 | 250 |
| Prime (PRP) | 180 | 225 |
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 | ~7.1 gph |
| 100% standby | ~14.1 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
PowerCommand 1.1 provides automatic remote start/stop, isochronous frequency regulation (±0.5%), voltage regulation ±1.0% no-load to full-load, alarm/status display, output metering, and NFPA 110 Level 1 compliance. Modbus RS485 interface is standard. An upgrade to PowerCommand 2.3 with AmpSentry protective relay is available, which adds overcurrent protection, reverse kW/VAR shutdown, and expanded communications. InPower PC-based service tool is available for diagnostics.
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 |
| TIF | < 50 per NEMA MG1-22.43 |
| Excitation | Torque match (shunt); PMG optional |
Our Service Experience#
At 200 kW, the QSB7-G5 is running near the top of its rated output range. We see more fuel system-related issues on C200D6D units operating at or near standby rating for extended periods — the high-pressure fuel injection components are sensitive to fuel quality, and any degradation in diesel cetane rating or water contamination will accelerate injector wear. We always include a fuel sample analysis and filter inspection in annual service on these units.
The identical physical footprint across the C125-C200 D6D family is convenient for upgrades, but it also means the C200D6D alternator is running at higher current density than its smaller siblings. Thermal imaging of the alternator and bus connections at annual service is worthwhile. For facilities with significant variable-frequency drive loads, we recommend specifying the PMG excitation option if not already installed, as it provides more stable voltage build-up under non-linear load conditions.
Frequently Asked Questions#
How does the C200 D6 compare to the C175 D6? The C200D6D and C175D6D (C175D6D, standby 175 kW / 219 kVA) share the same physical enclosure and QSB7-G5 engine. The C200D6D achieves the higher rating through engine calibration and alternator frame selection. Both carry the same EPA Tier 3 rating and NFPA 110 Level 1 compliance.
What fuel tank options are available? The C200D6D is available on an open skid or with a weather protective, Sound Level 1, or Sound Level 2 enclosure. Dual-wall sub-base fuel tanks are available in multiple capacities. The exact tank sizes should be confirmed with a Cummins distributor as they vary by regional availability.
Is the PowerCommand 1.1 compatible with building management systems? PowerCommand 1.1 includes an RS485 Modbus interface as standard equipment, making it compatible with most BMS/BAS platforms. The optional PowerCommand 500/550 remote monitoring accessory adds IP-based monitoring and alarm notification.
What is the expected service life of the QSB7-G5? Cummins rates the QSB7 for major overhaul at intervals that vary with application and load factor. For light standby duty (monthly exercise, infrequent utility outages), 20,000+ hours before major overhaul is typical. For sustained prime power operation at high load factors, intervals will be shorter. Oil and filter changes per the maintenance schedule (500-hour intervals) are the most critical factor.
Can the C200 D6 parallel with another generator? The standard PowerCommand 1.1 control does not include built-in paralleling capability. The PowerCommand 2.3 upgrade adds phase lock loop synchronizer and isochronous load sharing for genset-to-genset paralleling. Consult a Cummins distributor for paralleling configurations.
FAQ#
What is the standby rating of the Cummins C200 D6?#
The Cummins C200 D6 (model C200D6D) is rated at 200 kW standby / 250 kVA at 0.8 power factor, 60 Hz, 1800 rpm. Prime rating is 180 kW / 225 kVA.
What engine does the Cummins C200 D6 use?#
The C200 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. The QSB7-G5 is the same engine platform used in the C150D6D and C175D6D, operating at its highest ECM calibration at 200 kW.
What are the service intervals for the Cummins C200 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 C200 D6 EPA compliant?#
Yes. The C200D6D is EPA Tier 3 certified for stationary emergency standby applications under 40 CFR Part 60. It is UL 2200 listed and IBC 2012 seismic certified, meeting NFPA 110 Level 1 requirements for life-safety standby applications.
Can the Cummins C200 D6 be paralleled?#
The standard PowerCommand 1.1 control does not include built-in paralleling. Upgrading to PowerCommand 2.3 adds a phase-lock loop synchronizer and isochronous load sharing, enabling genset-to-genset paralleling. Consult a Cummins distributor for multi-unit configurations.
What fuel type does the Cummins C200 D6 use?#
The C200 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 C200 D6?#
Standard Cummins warranty is 2 years or 2,000 hours for standby applications. Extended warranty options are available through Cummins authorized dealers.
