Why is the QSK60 the data center standard?

Three reasons: (1) 2 MW from a single engine provides the power density that data center design requires, (2) Cummins manufactures engine + alternator + controller in-house giving a single-warranty-source advantage, and (3) the PowerCommand 3.3 controller enables seamless N+1 paralleling across multiple QSK60 units for multi-megawatt facilities.

How does the QSK60 compare to the Cat 3516C?

Both are 2 MW-class V-16 diesel platforms and both dominate the data center segment. The QSK60 has a slight edge in North American parts/service availability (6,000+ Cummins locations). The Cat 3516C has a longer track record in extreme environments (mining, oil & gas). For commercial standby, both are excellent — the decision often comes down to local dealer relationship.

Why Tier 2 and not Tier 4?

Large stationary emergency engines (>560 kW) are regulated under Tier 2 for emergency standby duty under EPA NSPS rules. Tier 4 Final applies to smaller non-road engines and prime-power applications. This means no aftertreatment (DPF/SCR) required for the QSK60 in emergency standby service — simpler maintenance.

How much fuel does a QSK60 consume?

At full load: approximately 140 gallons per hour. For 72-hour runtime at 75% load (typical NFPA 110 Level 1): approximately 7,500 gallons. Most installations use 10,000-20,000 gallon main storage tanks with day-tank transfer systems.

What is the PowerCommand 3.3?

Cummins' data-center-grade controller with full paralleling capability, digital metering, Modbus/SNMP communication, protective relaying (AmpSentry), and isochronous load sharing. It enables automatic load demand sequencing across multiple QSK60 units.

Cummins · QSK Series (Large Diesel)

Cummins QSK60

Name: Cummins QSK60
Brand: Cummins
Availability: PreOrder

2000 kW standby / 1825 kW prime · Diesel · Liquid-cooled

2000 kW diesel standby generator. The data center industry standard — V-16, 60.2L, Tier 2. Cummins' flagship for mission-critical power.

Standby power: 2000 kW / 1825 kW prime
Voltage options: 277/480V
Frequency / Phase: 60 Hz · 3-phase
Engine: Cummins QSK60-G6 NR2 · 60.2L
EPA / Emissions: Tier 2

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Overview#

The Cummins QSK60 is a 2,000-kilowatt diesel standby generator — the platform that powers a significant portion of the world's data centers, hospitals, and mission-critical facilities. At 60.2 liters across 16 cylinders, it delivers 2 MW from a single engine with the reliability that justifies its position as an industry reference standard.

Cummins' vertical integration (engine + alternator + controller all manufactured in-house) provides a single-source warranty and unified engineering that competitors match only with multi-vendor arrangements.

The 2 MW class#

At 2,000 kW, you're in the territory of:

Tier III/IV data centers: 4-12 QSK60 units per facility in N+1 arrays
Large hospitals: 2-4 units covering life-safety, critical, and equipment branches
Campus distribution: multiple buildings served from a central plant
Industrial process: continuous power backup for manufacturing

PowerCommand 3.3 paralleling#

The QSK60 pairs with Cummins' PowerCommand 3.3 controller for data-center-grade paralleling:

Load demand: starts only the generators needed, adds/sheds as load changes
Isochronous load sharing: perfect kW/kVAR balance across paralleled units
AmpSentry: protective relaying that prevents generator damage from abnormal conditions
Modbus + SNMP: full integration with BMS and IT monitoring platforms
Black start: sequenced startup from completely dead bus

Our service experience#

The QSK60 is our largest platform. We service these at data centers and hospital campuses across our territory. Annual maintenance is comprehensive: oil/coolant sampling and analysis, injector performance testing, turbo inspection, load bank test, battery load test, and full exercise cycle with transfer verification. The Modular Common Rail System (MCRS) fuel injection is sophisticated — fuel quality is paramount, and we include fuel sampling in every service visit. At 140 GPH consumption, fuel management is its own discipline on these installations.

FAQ#

What is the standby rating of the Cummins QSK60?#

The Cummins QSK60 is rated at 2,000 kW standby at 60 Hz, 1800 rpm. Prime rating is 1,825 kW. The standard low-voltage configuration is 277/480V three-phase.

What engine does the Cummins QSK60 use?#

The QSK60 uses the Cummins QSK60-G6 — a 60.2-liter, V-16 cylinder, turbocharged and aftercooled diesel with the Cummins Modular Common Rail System (MCRS) fuel injection. The engine is EPA Tier 2 certified for stationary emergency standby applications — no aftertreatment (DPF/SCR) is required.

What are the service intervals for the Cummins QSK60?#

Oil and filter changes are due at 500 hours or 12 months. Fuel filter replacement is scheduled at 500-hour intervals. Air filter replacement is due at 1,000-hour intervals. Coolant change is recommended at 6,000 hours or 5 years. Annual load bank testing is required. Major overhaul interval is 40,000 hours under standard standby duty, reflecting the QSK60's industrial-grade construction.

Is the Cummins QSK60 EPA compliant?#

Yes. The QSK60-G6 is EPA Tier 2 certified for stationary emergency standby applications and is CARB compliant for emergency standby use. It is also NFPA 110 Level 1 listed and UL 2200 listed. No aftertreatment is required for emergency standby service.

Can the Cummins QSK60 be paralleled?#

Yes. The QSK60 with PowerCommand 3.3 controller is the dominant platform for large-scale paralleling at data centers and hospitals. It supports N+1, 2N, and demand-sequenced paralleling arrays from 2 MW to 20+ MW. Isochronous load sharing, AmpSentry protection, Modbus/SNMP integration, and black-start capability are all standard in PowerCommand 3.3.

What fuel type does the Cummins QSK60 use?#

The QSK60 runs on diesel fuel. The MCRS system requires clean, high-quality diesel — ultra-low sulphur diesel (ULSD) is recommended. At full load consumption of approximately 140 gallons per hour, fuel quality management and tank turnover are critical operational considerations.

What is the warranty on the Cummins QSK60?#

Standard Cummins warranty for new generator sets is 2 years or 2,000 hours for standby applications. Cummins Power Generation service agreements with guaranteed response times are available and strongly recommended for mission-critical installations.

Engineering specifications

Physical

Length: 243 in
Width: 100 in
Height: 126 in
Wet weight: 39,470 lb

Fuel system & runtime

Fuel use @ full load: 103 GPH
Fuel use @ 75% load: 76.9 GPH

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Estimate runtime for the Cummins QSK60

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

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Generator size

Fuel

Fuel tank capacity

gal

Load

Override full-load GPH (optional)

GPH

Estimated runtime

2.5 hours(0.1 days)

Fuel consumption ≈ 79.46 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 QSK60 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: ≈ 40,000 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.

Component	Symptom	Typical hours	Severity
Fuel quality (standby degradation)	Injector fouling, filter clogging, hard starting	4,380+	moderate
Turbocharger(s)	Reduced power, excessive smoke, turbo noise	18,000+	moderate
Starting system (24V battery banks)	Slow crank, failed 10-second start requirement	8,760+	minor
Coolant heater system	Cold start issues, block heater element failure	10,000+	minor
Fuel injectors (MCRS)	Rough running, smoke, fuel knock, power imbalance	15,000+	moderate

Frequently Asked Questions

Why is the QSK60 the data center standard?: Three reasons: (1) 2 MW from a single engine provides the power density that data center design requires, (2) Cummins manufactures engine + alternator + controller in-house giving a single-warranty-source advantage, and (3) the PowerCommand 3.3 controller enables seamless N+1 paralleling across multiple QSK60 units for multi-megawatt facilities.
How does the QSK60 compare to the Cat 3516C?: Both are 2 MW-class V-16 diesel platforms and both dominate the data center segment. The QSK60 has a slight edge in North American parts/service availability (6,000+ Cummins locations). The Cat 3516C has a longer track record in extreme environments (mining, oil & gas). For commercial standby, both are excellent — the decision often comes down to local dealer relationship.
Why Tier 2 and not Tier 4?: Large stationary emergency engines (>560 kW) are regulated under Tier 2 for emergency standby duty under EPA NSPS rules. Tier 4 Final applies to smaller non-road engines and prime-power applications. This means no aftertreatment (DPF/SCR) required for the QSK60 in emergency standby service — simpler maintenance.
How much fuel does a QSK60 consume?: At full load: approximately 140 gallons per hour. For 72-hour runtime at 75% load (typical NFPA 110 Level 1): approximately 7,500 gallons. Most installations use 10,000-20,000 gallon main storage tanks with day-tank transfer systems.
What is the PowerCommand 3.3?: Cummins' data-center-grade controller with full paralleling capability, digital metering, Modbus/SNMP communication, protective relaying (AmpSentry), and isochronous load sharing. It enables automatic load demand sequencing across multiple QSK60 units.

Compatible equipment

Transfer switches

More in the QSK Series (Large Diesel)

500–3,010 kW of vertically integrated Cummins power — the QSK is the industry standard for mission-critical large diesel.

View all 8models in this series →

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