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Cummins QSK38-G4 G-Drive Generator Engine (1250kW, 1800RPM)
The Cummins QSK38-G4 G-Drive engine is a high-performance 38L diesel engine engineered for generator set applications requiring reliable standby and prime power. As part of the Quantum Series, this model delivers 1250kW standby power at 1800RPM (60Hz) and approximately 1231kW net electrical output in generator configurations.
HekoPower supplies original CCEC QSK38-G4 engines with global shipping, competitive wholesale pricing, and full technical support.
Tech Specs of Cummins QSK38-G4
General Engine Data
Engine Model: Cummins QSK38-G4
Type: 12 Cylinders
Displacement: 37.7 L
Bore * Stroke: 159 * 159
Net Weight: 3825 Kg
Overall Dimension: 2081mm*1492mm*1866mm
Key Performance Data
Rated Power/Standby Output: 1231kW(1651HP), 1376kW(1845HP)
Rated Speed: 1500 rpm
Low Idle Speed: 700-800 rpm
Fuel Consumption: 78.7 g/kWh
More Technical Data
Fuel System: Cummins Direct Injection MCRS
Aspiration: Turbocharged, After-cooled
Electrical System (Starter Motor/Alternator): 24V
Cooling System Design: 2 pump- 2 loop
Power Ratings Explained: 1250kW vs 1231kW
A common point of confusion for buyers is the power rating. The QSK38-G4 is typically rated at 1250kW (Standby/ESP) and 1231kW (Prime/Continuous).
- Emergency Standby Power (ESP): 1250kW. This is the maximum power available during a utility power outage. It is designed for variable load use for the duration of the outage.
- Prime Power (PRP): 1231kW. This is the maximum power available for a variable load for an unlimited number of hours.
Key Technical Advantages of QSK38-G4 Diesel Engine
MCRS Fuel System for Fuel Efficiency
The Modular Common Rail System (MCRS) enables precise fuel injection and optimized combustion. The engine achieves around 78.7 g/kWh fuel consumption at 75% load, reducing operating costs for long-term industrial use.
Advanced Turbocharging & Cooling System
- CTT HX83 turbocharging system
- Two-pump, two-loop cooling design
- High-efficiency air handling
These systems ensure stable performance under high ambient temperatures and continuous loads.
High-Strength Engine Structure
- FCD piston design for durability
- 37.7L displacement V12 configuration
- Heavy-duty industrial construction
This ensures long overhaul intervals and reduced maintenance frequency.
Applications of QSK38-G4 Generator Engine
Emergency Standby Power (ESP)
The QSK38-G4 is widely used in:
- Data centers (critical backup systems)
- Hospitals and healthcare facilities
- Airports and infrastructure projects
It provides immediate power during mains power failure.
Prime Power (PRP) Applications
Suitable for continuous operation in:
- Mining and quarry sites
- Oil & gas operations
- Remote industrial facilities
QSK38-G4 vs. KTA38-G4: Why Upgrade?
Many industrial operators ask about the difference between QSK38-G4 and KTA38-G4. While the KTA series is a legend in durability, the QSK38-G4 offers superior electronic control. The Quantum Series utilizes FCD (Ferrous Ductile Iron) pistons for high-strength design, allowing for higher cylinder pressures and longer overhaul interval hours. For modern facilities requiring QSK38-G4 EPA Tier 2 emissions compliance, the Quantum series is the undisputed choice.
Application-Specific Power: ESP vs. PRP
Understanding the difference between Emergency Standby Power (ESP) and Prime Power (PRP) is crucial for your project:
- ESP: Ideal for data center emergency power and industrial power outage safety equipment.
- PRP: Best for remote mining generators and power plants where the engine is the primary source of electricity.
Why Source Your QSK38-G4 from HekoPower?
As a leading QSK38-G4 supplier in China, HekoPower ensures that every engine is a CCEC original QSK38-G4 wholesale unit. We understand that downtime is expensive, which is why we offer:
- Fast Delivery: Standard lead times of 15–30 days.
- Flexible Payment: Supporting T/T and L/C payment terms.
- Global Shipping: Comprehensive logistics for heavy-duty industrial generator engines.
- After-Sales Support: Access to a full CCEC QSK38 overhaul parts catalog.
Maintenance and Reliability
Is the Cummins QSK38-G4 reliable? Yes, provided the maintenance schedule is followed. With a robust 24V electrical system and a 2-pump 2-loop cooling system, it is built for 24/7 operation. HekoPower provides full technical support to ensure your installation meets the QSK38-G4 fuel consumption at 75% load benchmarks.
Cummins QSK-G Series, original products from Chongqing Cummins Engine Plant(CCEC). This series mainly includes QSNT-G, QSK19-G4, QSK19-G5, QSKTAA19-G3, QSK38-G1, QSK38-G2, QSK38-G3, QSK38-G4, QSK38-G5, QSK50-G2, QSK50-G3, QSK50-G4, QSK50-G6, QSK50-G7.
