Overview#
The Cummins QSK95 is a 3010 kW standby diesel generator set powered by one of the most advanced high-horsepower engines in the power generation industry. With 95.3 liters of displacement from 16 cylinders in a 60-degree V configuration, the QSK95-G10 delivers massive power density while achieving best-in-class transient performance -- capable of accepting 100% of rated load in a single step, meeting ISO 8528-G3 and NFPA 110 requirements without compromise.
The QSK95 was purpose-built for power generation, not adapted from a marine or industrial engine. Every system -- from the quad turbochargers to the 2P2L cooling architecture to the MCRS fuel injection -- was designed specifically for the demands of standby and prime power applications.
Engine technology#
The QSK95-G10 incorporates several advanced systems:
- Quad turbocharging: Four Cummins Turbo Technologies (CTT) HE800 turbochargers utilize exhaust energy with exceptional efficiency. The quad arrangement provides the boost response needed for 100% single-step load acceptance
- 2 Pump 2 Loop (2P2L) cooling: Separate high-temperature and low-temperature cooling circuits enable higher power density while maintaining emissions compliance
- Modular Common Rail System (MCRS): Operating at up to 2500 bar fuel pressure -- significantly higher than typical common rail systems -- for superior fuel atomization and in-cylinder emissions control
- Ductile iron block: 60-degree V configuration for optimal balance and vibration characteristics
- Triple redundant starters: Three electric starters standard, optional fourth, plus air starter options
Fuel system and filtration#
The MCRS fuel system features:
- High-pressure fuel pump with integrated lube filter to ensure clean oil from the pre-lube pump
- Combined priming and fuel transfer pump (electronic) for quick low-pressure system priming
- Redundant fuel filter option: Selector valve on primary filtration stage allows filter changes without interrupting operation -- critical for mission-critical standby applications
- Triple-element filtration: 5 micron primary with water separators, 3 micron/2 micron filter-in-filter secondary
Serviceability#
The QSK95 was designed with maintenance in mind:
- Externally mounted lube pump for easy access without engine disassembly
- Large oil pan access gaps in the engine block for pan removal and internal inspection
- 647 liters lube oil capacity -- generous volume for thermal stability and extended service intervals
- Enhanced monitoring capabilities for predictive maintenance
- SAE 00 flywheel for large-frame alternator mounting
Physical specifications#
At 3654 mm long, 1372 mm wide, and 2359 mm high with a dry weight of 12,784 kg, the QSK95 is remarkably compact for a 3 MW class engine. The ductile iron V-16 block is narrower than competing V-20 designs at similar power levels.
Our service experience#
The QSK95 is Cummins' flagship high-horsepower platform and commands a premium in both acquisition and maintenance. The quad turbocharger system requires coordinated inspection -- all four units should be serviced together. The MCRS fuel system operates at extreme pressures and demands meticulous fuel quality management. Pre-lube system health is critical: the pressure switch and lube filter must be verified regularly to prevent dry-start damage. For facilities running QSK95 units, a Cummins Power Generation service contract with guaranteed response times is strongly recommended.
FAQ#
What is the standby rating of the Cummins QSK95?#
The Cummins QSK95-G10 is rated at 3,010 kW standby / 3,760 kVA at 0.8 power factor, 1500 rpm (50 Hz). Prime rating is 2,690 kW / 3,360 kVA. Continuous rating is 2,410 kW / 3,010 kVA. 60 Hz configurations at 1800 rpm are also available — consult Cummins for specific ratings.
What engine does the Cummins QSK95 use?#
The QSK95 uses the Cummins QSK95-G10 — a 95.3-liter, V-16 cylinder, turbocharged (quad-turbo) and low-temperature aftercooled diesel with the Cummins MCRS operating at up to 2,500 bar injection pressure. It is EPA Tier 2 certified and ISO 8528-G3 transient capable.
What are the service intervals for the Cummins QSK95?#
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. The quad turbocharger system and pre-lube system require dedicated inspection at each service event.
Is the Cummins QSK95 EPA compliant?#
Yes. The QSK95-G10 is EPA Tier 2 certified for stationary power generation. No aftertreatment (DPF/SCR) is required, which simplifies maintenance for this complex platform. It also meets CE, ISO 8528, and NFPA 110 standards.
Can the Cummins QSK95 be paralleled?#
Yes. The QSK95 with PowerCommand controls supports genset-to-genset paralleling and is used in campus-scale and hyperscale data center arrays. At 3 MW per unit, it is one of the most power-dense single-unit generators in the industry. The 277/480V low-voltage configuration is standard; medium-voltage options are available for utility-interconnect applications.
What fuel type does the Cummins QSK95 use?#
The QSK95-G10 runs on standard diesel fuel. The MCRS system at 2,500 bar requires meticulous fuel quality management — ultra-low sulphur diesel (ULSD) and annual fuel sampling with polishing assessment are required elements of the maintenance program.
What is the warranty on the Cummins QSK95?#
Standard Cummins warranty for new generator sets is 2 years or 2,000 hours for standby applications. A Cummins Power Generation service agreement with guaranteed response times is strongly recommended given the platform's complexity and mission-critical role.
