Details
Original Cummins, new machines at absolute wholesale prices.
HekoPower Group is the reliable choice.
Cummins KTA38-G1 634KW Generator Engine | CCEC 12-Cylinder Power
The Cummins KTA38-G1 634kW generator engine is a heavy-duty power solution developed under CCEC (Chongqing Cummins), designed for reliable performance in continuous and standby applications. As a 37.8L 12-cylinder V-type diesel engine, it delivers stable output at 1500RPM (50Hz), making it ideal for 800kVA to 900kVA generator sets.
As an experienced supplier, HekoPower provides genuine CCEC Cummins KTA38-G1 engines with global shipping, fast delivery, and complete technical support. This model is widely used in industrial backup power, data centers, hospitals, and mining operations.
Tech Specs of Cummins KTA38-G1 634KW
General Engine Data
Engine Model: Cummins KTA38-G1-634KW
Type: 12 Cylinders, 60° V Type, 4 Stroke Diesel
Displacement: 37.8 L
Bore * Stroke: 159 * 159
Net Weight: 3954 Kg
Overall Dimension: 2341mm*1360mm*1653mm
Key Performance Data
Rated Power, Standby Output: 634 kW/862HP, 701 kW/953HP
Rated Speed: 1500 rpm
Low Idle Speed: 725-775 rpm
Fuel Consumption @ Rated Power: 154 L/Kw.h
More Technical Data
Engine Exhaust Manifold: Optional for Wet Exhaust manifold Heat exchanger
Aspiration: Turbocharged/Intercooled
Compression Radio: 14.5:1
Fuel System: Cummins PT Pump, Direct Injection
Starting System: Electrical starting motor (24V)
Cooling Method: Water cooling
Lowest Starting Temp (Without auxiliary system): -12℃
Governor Type: Mechanical Control, ≤ 5%
Technical Advantages: Why Choose the KTA38-G1 634kW?
Unlike newer, smaller displacement engines that run at high pressures, the CCEC KTA38-G1 634KW diesel engine relies on its 37.8L displacement to manage heavy loads.
- PT Fuel System Efficiency: The KTA38-G1 PT fuel system calibration ensures stable direct injection, allowing for superior altitude compensation performance in mountain-based mining operations.
- Cooling & Exhaust: Our units can be configured with a wet exhaust manifold and heat exchanger, making the Cummins KTA38-G1 634KW for marine auxiliary power a top-tier choice for vessel shipbuilders.
- Startup Reliability: Specifically tested for CCEC KTA38-G1 634KW -12℃ low temperature start, this engine is ideal for standby power in cold-climate regions without the immediate need for expensive auxiliary heating kits.
Application Scenarios for KTA38-G1 634kW Engine
The Cummins KTA38-G1 is widely used across multiple industries due to its durability and cost-effectiveness
- Industrial backup power for factories during outages
- Data center standby power systems requiring stable output
- Mining operations and remote site auxiliary power
- Hospital emergency power supply (800–900kVA range)
- Marine auxiliary power systems (IMO Tier II compliant)
Fuel Efficiency and Operating Performance
At 1500RPM, the Cummins KTA38-G1 634kW engine delivers optimized fuel consumption, especially under prime power conditions. Compared to higher-rated models such as G2 and G5, the G1 offers better fuel efficiency at medium load ranges, making it suitable for long-duration operation.
Altitude compensation and turbocharging allow consistent performance even in high-altitude installations, reducing power loss and improving reliability.
Generator Matching and Installation Guidance
The KTA38-G1 engine can be paired with internationally recognized alternators such as Stamford and Marathon for optimal generator performance.
Key considerations:
- Proper alternator matching for 800kVA–900kVA output
- Adequate cooling and ventilation system design
- Fuel system calibration for prime or standby operation
- Space planning based on engine dimensions and weight (approx. 3954kg)
Performance Comparison: KTA38-G1 vs. G2 vs. G5
A frequent question for engineers is the difference between Cummins KTA38-G1, G2, and G5 generator ratings. While all three share the 38L block, the G1 is optimized for the 600-650kW range. Choosing the G1 for an 800kVA set offers a better lifecycle cost analysis and overhaul interval (20,000+ hours) compared to pushing a smaller engine to its limits. Furthermore, the KTA38-G1 low load fuel efficiency is often superior to the G2 when running at 30-50% capacity, common in hospital standby scenarios.
Installation and Maintenance for Industrial Environments
As an engine supplier, HekoPower understands the KTA38-G1 engine dimensions and weight (3954kg) are critical for containerized genset design.
- Alternator Matching: We provide a full Cummins KTA38-G1 alternator matching guide, recommending Stamford or Marathon frames to ensure voltage stability for sensitive data center backup power.
- Control Systems: Buyers can choose between mechanical governors for simple operation or electronic control options for better frequency stability in modern power plants.
- Global Logistics: We offer wholesale pricing with 15-30 days lead time, including seaworthy packaging and global shipping via T/T or L/C payment.
HekoPower Quality Assurance & Warranty
Every original CCEC KTA38-G1 634KW from HekoPower comes with a 12-month warranty and a full-load test report. We also include a Cummins KTA38-G1 spare parts kit (filters, belts, gaskets) to ensure your first service interval is seamless. From overhaul intervals to installation adaptation requirements, our team provides the technical support needed to repower old 800kVA sets or build new power solutions.
Cummins K38-G Series, original products from Chongqing Cummins Engine Plant(CCEC). This series mainly includes KT38-G-560KW, KTA38-G1-634KW, KTA38-G2-664KW, KTA38-G2A-813KW, KTA38-G2B-711KW, KTA38-G5-880KW, KTA38-G9A-1195KW, KT38-G-679KW, KTA38-G2-809KW, KTA38-G2A-915KW, KTA38-G4-1007KW.
