Cummins

Cummins C200D6

200 kW standby / 180 kW prime · Diesel · Liquid-cooled

Cummins C200D6: 200 kW commercial standby diesel generator powered by the QSB7-G5 engine. Three-phase 277/480V for commercial and light industrial standby applications.

Standby power
200 kW / 180 kW prime
Voltage options
277/480V
Frequency / Phase
60 Hz · 3-phase
Engine
Cummins QSB7-G5 · 6.7L
EPA / Emissions
Tier 3

Overview#

The Cummins C200D6 is a 200 kW commercial standby diesel generator powered by the Cummins QSB7-G5 engine — a higher-output variant of the 6.7-liter inline-6 QSB7 platform. Delivering three-phase 277/480V power at 60 Hz, the C200D6 serves larger commercial buildings, multi-tenant retail, hospitality properties, and light industrial facilities that need more capacity than the 150 kW class provides.

The QSB7-G5 uses the same proven 6.7-liter inline-6 architecture as the C150D6 but with enhanced turbocharging and fueling calibration to achieve the 200 kW standby rating. This shared platform means service procedures, parts inventories, and technician training carry over directly between the 150 kW and 200 kW models, simplifying fleet management for operators who specify multiple Cummins commercial generators across their building portfolios.

The C200D6 features the Cummins PowerCommand controller with digital paralleling capability, enabling multi-unit configurations for facilities that need redundancy or scalable capacity. The generator accepts 100% rated load in a single step per NFPA 110 and is available in open-skid, sound-attenuated, and weather-protective enclosure options to match site requirements.

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Estimate runtime for the Cummins C200D6

Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.

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Estimated runtime

18.5 hours(0.8 days)

Fuel consumption ≈ 10.80 GPH at 75% load. Estimate based on industry-typical 1800 RPM standby curves (≈0.07 GPH/kW at full load). Actual consumption varies by engine, ambient temperature, fuel quality, and tuning.

Service intervals

Manufacturer-recommended intervals for the Cummins C200D6 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.

Oil & filter
Every 500 hours or 12 months
Coolant change
Every 6000 hours
Air filter
Every 1000 hours
Fuel filter
Every 500 hours
Major overhaul
20,000 hours
Load bank test
Every 12 months

Common failure modes

What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.

ComponentSymptomTypical hoursSeverity
QSB7 high-pressure fuel injectorsRough running, power loss, injector fault codes, fuel dilution of oil8,000+moderate
Charge air cooler coreCoolant in intake, white exhaust smoke, engine overheat15,000+severe
Voltage regulator / AVRVoltage waveform distortion, nuisance tripping under VFD loads12,000+moderate

Frequently Asked Questions

What is the difference between the Cummins C150D6 and C200D6?
Both use the same 6.7-liter QSB7 engine platform. The C200D6 uses the QSB7-G5 variant with enhanced turbocharging and fueling calibration to achieve 200 kW standby versus 150 kW. Service procedures and parts inventories are largely interchangeable between the two models.
Can the Cummins C200D6 be paralleled with other generators?
Yes. The C200D6 features the Cummins PowerCommand controller with digital paralleling capability, enabling multi-unit configurations for facilities requiring redundancy or scalable capacity. It accepts 100% rated load in a single step per NFPA 110.

More in the Cummins QSB Series (Commercial)

Cummins mid-range commercial diesel generators — 60–200 kW on QSB 4.5L and 6.7L inline engines.

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