Overview#
The Cummins KTA50-GS8 is a 1,340-kilowatt standby diesel generator (at 50 Hz) built on the 50.3-liter V16 KTA50 — Cummins' legacy high-output large diesel platform that preceded the QSK50 in current production. At 1500 rpm (50 Hz), the KTA50-GS8 delivers 1340 kW standby / 1675 kVA and 1200 kW prime / 1500 kVA using the Cummins PT direct injection system.
Important note on frequency: The KTA50-GS8 is a 50 Hz generator platform rated at 1500 rpm. Published specifications are for 50 Hz operation only. Facilities requiring 60 Hz standby power should consider the Cummins QSK50-G4 (1500 kW at 60 Hz, 1800 rpm).
The KTA50 uses a two-pump two-loop (2P2L) cooling architecture that separates engine jacket and aftercooler circuits — the same concept applied in the QSK50-G4 — providing higher power density and reliable operation up to 48 °C ambient. The PT fuel system is mechanically governed and serviceable without common rail diagnostic software, making the KTA50 a platform of choice for remote industrial, mining, and international applications throughout its production life.
Engine dry weight is 6,580 kg with 178 liters of lube oil capacity and 496 liters of coolant capacity — engineering that reflects sustained high-load operation requirements.
Technical Specifications#
| Parameter | Value |
|---|---|
| Standby Rating | 1340 kWe (1675 kVA) |
| Prime Rating | 1200 kWe (1500 kVA) |
| Frequency | 50 Hz |
| Engine Model | KTA50-GS8 |
| Displacement | 50.3 liters |
| Configuration | Cast iron, V-16 |
| Aspiration | Turbocharged and aftercooled (2P2L) |
| Rated Speed | 1500 rpm |
| Starting Voltage | 24V |
| Battery Charging Alternator | 35 amps |
| Lube Oil Capacity | 178 liters |
| Coolant Capacity | 496 liters |
| Limiting Ambient Temp (50 Hz) | 48 °C |
| Engine Length | 3720 mm |
| Engine Width | 2000 mm |
| Engine Height | 2516 mm |
| Engine Dry Weight | 6,580 kg |
Fuel consumption at 1500 rpm (50 Hz) — estimated from published prime/standby ratios:
| Power Level | Load % | L/hr |
|---|---|---|
| Standby | 100 | 374 |
| Prime | 100 | 329 |
| Prime | 75 | 252 |
| Prime | 50 | 181 |
| Prime | 25 | 107 |
Our Service Experience#
The KTA50 is our largest legacy single-unit platform. Service visits are comprehensive: oil and coolant analysis, PT injection pump timing and condition check, turbocharger inspection for both units (bearing condition, shaft play, inlet/outlet), full 2P2L cooling system pressure testing on both the high-temperature jacket circuit and low-temperature aftercooler circuit, and load bank testing at rated output.
The 2P2L cooling architecture requires independent verification of both cooling loops — degradation in either loop will compromise the unit's ability to maintain rated output at high ambient temperatures. Coolant capacity of 496 liters means coolant condition management is a priority. We include coolant sampling and chemistry analysis in every KTA50 service event.
Fuel management at 1340 kW is significant — annual fuel sampling, treatment assessment, and tank bottom inspection are standard inclusions. PT injectors are sensitive to degraded or contaminated fuel.
Frequently Asked Questions#
What are the KTA50-GS8 power ratings? Standby (ESP): 1340 kWe / 1675 kVA at 50 Hz (1500 rpm). Prime (PRP): 1200 kWe / 1500 kVA. The KTA50-GS8 is rated for 50 Hz operation only.
What fuel injection system does the KTA50-GS8 use? The Cummins PT (Pressure-Time) direct injection system — mechanically governed, field-serviceable, no common rail diagnostic software required.
What is the KTA50's cooling system? Two-pump two-loop (2P2L) design with separate high-temperature jacket and low-temperature aftercooler circuits. Coolant capacity 496 liters, limiting ambient 48 °C at 50 Hz.
What are the engine dimensions and weight? Engine only: 3720 mm long x 2000 mm wide x 2516 mm tall, dry weight 6,580 kg. Lube oil capacity 178 liters.
How does the KTA50 differ from the QSK50? KTA50-GS8: PT injection, 50 Hz only, 1340 kW standby at 1500 rpm, legacy platform. QSK50-G4: MCRS 1600 bar, EPA Tier 2, 1500 kW standby at 60 Hz (1800 rpm), current production.
FAQ#
What is the standby rating of the Cummins KTA50?#
The Cummins KTA50-GS8 is rated at 1,340 kW standby / 1,675 kVA at 0.8 power factor, 50 Hz, 1500 rpm. Prime rating is 1,200 kW / 1,500 kVA. The KTA50-GS8 is a 50 Hz platform — it does not have published 60 Hz ratings.
What engine does the Cummins KTA50 use?#
The KTA50 uses the Cummins KTA50-GS8 — a 50.3-liter, V-16 cylinder, turbocharged and aftercooled diesel using the Cummins PT (Pressure-Time) direct injection system and a two-pump two-loop (2P2L) cooling architecture. It is a legacy platform with an extensive installed base at data centers, hospitals, and industrial facilities.
What are the service intervals for the Cummins KTA50?#
As a legacy EPA Tier 1-era platform, the KTA50 requires more frequent oil and filter changes than current-generation engines — due at 250 hours or 6 months, whichever comes first. 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 30,000 hours under standard operating conditions. The 2P2L cooling system requires independent verification of both cooling loops at each service.
Is the Cummins KTA50 EPA compliant?#
The KTA50 predates the EPA tier certification system for stationary engines. It is a non-regulated legacy platform. For stationary emergency standby applications at existing installations, verify applicable requirements with your local air quality management district.
Can the Cummins KTA50 be paralleled?#
Yes. The KTA50 was widely deployed in paralleling arrays at data centers and large institutions during its production life. Control system options for paralleling vary by installation — consult a Cummins service dealer for retrofit paralleling options. The 50 Hz platform is common in international and export installations.
What fuel type does the Cummins KTA50 use?#
The KTA50-GS8 runs on diesel fuel. The PT fuel system is compatible with standard and ultra-low sulphur diesel. The 178-liter oil capacity and 496-liter coolant capacity require careful fluid management. Annual fuel sampling and coolant chemistry analysis are part of the standard maintenance program.
What is the warranty on the Cummins KTA50?#
The KTA50-GS8 is a legacy platform — new-unit warranties no longer apply. Refurbished or remanufactured KTA50 units may carry limited coverage from the remanufacturing facility. Cummins' legacy support program continues to provide parts availability for this extensively installed platform.
