Cummins KTA50-G3 Generator Drive Engine

The KTA50-G3 is the 50Hz, 1500 RPM configuration within Cummins' KTA50 generator drive family — a mechanical-injection, turbocharged and aftercooled V16 designed specifically for continuous-duty power generation, not converted from a vehicle or marine platform. Its Cummins PT (Pressure-Time) fuel system is mechanically governed, making it serviceable without electronic diagnostic equipment — a practical advantage in remote mining sites, off-grid power stations, and regions with limited Cummins dealer infrastructure.

Genuine CCEC origin can be verified at delivery via the engine dataplate (Engine Config No. D283021DX02) and CCEC factory certificate of conformance, both supplied as standard with each unit.

Technical Specs

Performance

Engine Configuration

Electrical & Starting

Dimensions & Weight

Note on cold start: −12°C is the rated minimum without auxiliary heating. For installations in ambient temperatures below −12°C (northern mining operations, high-altitude sites), a jacket water heater or block heater system is required. Contact us for compatible auxiliary heating specifications.

KTA50 Series Comparison

The KTA50 family covers seven configurations across two frequency ratings and three aftercooling designs. The table below is the complete selection reference.

How to select the right variant

Step 1 — Grid frequency first

This is non-negotiable. 50Hz grid (Europe, Asia, Africa, Middle East, Australia) → G3 / G3E / G7E / G8 / GS8 / G12. 60Hz grid (North America, Japan, parts of Latin America) → G9 only. The G3 and G9 are not interchangeable.

Step 2 — Power output requirement

Match your generator set's rated output to the engine's prime power rating, not standby. For a standard 1000 kW genset build with 10% headroom, the G3 (1097 kW prime) is the minimum fit. For 1100–1200 kW genset builds, evaluate G3E, G7E, or G8.

Step 3 — Aftercooling type and its consequences

Water-Air aftercooling (G3, G3E, G7E) uses engine jacket water in the aftercooler circuit — simpler plumbing in some installations. Low-Temp aftercooling (G8, GS8, G9, G12) uses a dedicated low-temperature water circuit, enabling higher charge air density and marginally better fuel efficiency at higher load factors. Both require the mandatory two-pump, two-loop cooling system.

Step 4 — Compression ratio and parts compatibility

This determines your rebuild kit family. 13.9:1 engines (G3, GS8, G9, G12) share the same overhaul kit. 14.7:1 (G3E, G7E) and 14.9:1 (G8) use different piston and ring specifications. If you operate a mixed fleet, standardizing on one compression ratio reduces parts inventory complexity.

Enquire about availability by variant — not all configurations are held in stock. Contact us with your target variant and quantity for lead time confirmation.

Replacement Compatibility

Replacement & Drop-In Compatibility

Direct Engine Replacement

The KTA50-G3 replaces any existing KTA50-G3 unit on a direct mechanical and dimensional basis. Confirm using the engine dataplate before ordering:

· Engine Config No.: D283021DX02
· Performance Curve: FR-6250
· Compression Ratio: 13.9:1
· Flywheel Housing: FH 6024
· Flywheel Options: FW 6009 (12.7 kg·m²) or FW 6017 (21.7 kg·m²)

If your existing engine dataplate shows a different Config No., your unit may be a G3E or G7E variant (14.7:1 compression ratio) — these share the same external envelope but require different internal components. Contact us with your dataplate details for confirmation before ordering.

CPL Compatibility Reference

The KTA50-G3 at 13.9:1 compression ratio covers the following CPL codes. This determines overhaul kit and piston compatibility:

CPL codes: 968 · 1219 · 1254 · 1528 · 1544 · 1657 · 2159 · 2227 · 2527 · 2533 · 6229 · 6230 · 6231 · 6240 · 6241

Don't know your CPL code? It is stamped on the engine dataplate alongside the serial number. Send us a photo of your dataplate and we will confirm part compatibility before you order.

Generator Set Compatibility

The KTA50-G3 is the documented prime mover for 1250 kW diesel generator sets configured with the following alternator brands:

· Stamford (most common in African and Asian OEM builds)
· Marathon (common in infrastructure and utility projects)

SAE flywheel interface specifications (FH 6024) are standard across major alternator manufacturers. Confirm SAE coupling size with your alternator supplier if building a new set.

What Is NOT a Direct Replacement

Parts & Service

Overhaul Kits

The KTA50-G3 (13.9:1 compression ratio) uses overhaul kit IFK1241-K50, covering all CPL codes listed in the Replacement Compatibility section above. Two overhaul scopes are available:

Note: 14.7:1 compression ratio engines (G3E, G7E) use a different kit — IFK1244-KTA50 with one-piece pistons. Cross-ordering between kits will result in incorrect piston pin and ring specifications.

High-Wear Parts Categories

· Injectors — PT injector sets, matched and calibrated by CPL. Recalibration required every 6,000–8,000 hrs by authorized Cummins service center
· Fuel Pump (PT Pump) — Assembly and repair kit available. PT pump calibration requires specialized test bench equipment; field replacement only, calibration must be off-engine
· Turbocharger — OEM replacement unit available by model; confirm turbo model number from engine dataplate before ordering
· Cylinder Head — Standard and Rotocoil configurations available; confirm valve seat specification from CPL
· Filters (3-in-1) — Oil filter, fuel filter, coolant filter; 223L oil capacity means filter volume is significantly larger than KTA19/KTA38 equivalents — verify part numbers before bulk stocking

PT Fuel System Service Note

The Cummins PT system is mechanically governed and does not require electronic diagnostic tools for field maintenance. However, PT pump calibration and injector matching must be performed by a Cummins-authorized service center with a calibrated PT test bench. Uncalibrated PT pumps will cause uneven cylinder loading, power loss, and accelerated injector wear. This is not a limitation — it is the correct maintenance protocol for this fuel system type.

Genuine vs Aftermarket

We supply genuine CCEC parts as standard. OEM-equivalent options available on request for specific categories. Contact us with your CPL code and part requirement for availability confirmation.

Procurement & Logistics

Order & Lead Time

· Standard lead time: 15–20 business days from order confirmation
· Stock status: Contact us for current availability — select CPL configurations may ship faster from existing inventory
· Minimum order: Single unit accepted; volume pricing applies from 2 units

Pricing is quoted FOB Shenzhen. CIF and CNF pricing available on request with destination port details.

Export Documentation Package (Standard)

Every shipment includes: · CCEC factory certificate of conformance · Engine dataplate record (Config No. + serial number) · Commercial invoice · Packing list · Bill of lading · Certificate of origin (on request) · Insurance certificate (CIF/CNF terms)

Shipping Specifications

Transit Damage Protection

Each unit is export-crated and inspected prior to dispatch. For CIF and CNF orders, marine insurance is included. For FOB orders, we recommend buyers arrange all-risk marine cargo cover — KTA50-G3 units are high-value single items; standard carrier liability limits will not cover full replacement cost in the event of transit damage.

Upon container arrival, inspect the outer crating before signing the bill of lading. Any visible damage to the crate must be noted on the shipping documents before acceptance. Claims submitted after a clean bill of lading is signed cannot be supported.

Payment Terms

· T/T (Telegraphic Transfer): 30% deposit on order confirmation, 70% balance against copy of bill of lading
· L/C (Letter of Credit): Irrevocable, at-sight L/C accepted from approved banks
· Other arrangements: contact us for project-specific terms on large-volume orders

Warranty & After-Sales

Coverage

Exclusions

· Incorrect installation — including failure to implement two-pump, two-loop cooling
· Operation beyond rated parameters (overspeed, sustained overload above standby rating)
· PT pump or injector damage from unauthorized adjustment
· Consumables: filters · belts · coolant · lubricating oil
· Contaminated fuel or incorrect lubricant specification
· Units with altered or removed serial number plates

Claim Process

① Document — Photograph the defect. Record serial number, hour meter reading, and all active fault codes before any intervention.
② Notify within 48 hours — Submit to our after-sales team. Do not disassemble before claim authorization — unauthorized disassembly voids coverage.
③ Assessment — Engineering review within 2 business days. Remote diagnosis via photos and data is standard.
④ Resolution — Approved claims: parts dispatched within 5 business days. On-site inspection coordinated through nearest CCEC service network where required.

After-Sales Support

· Documentation: O&M Manual, Parts Catalog, Performance Curve FR-6250 — supplied on request at purchase
· Remote support: Technical consultation via email and WhatsApp for installation and commissioning
· Service network: Global Cummins / CCEC authorized coverage — confirm nearest center before commissioning

Note: Operating in a remote location without a local Cummins service center? Advise us at time of order — we will provide a recommended spare parts pre-stock list based on your site profile and planned operating hours.

Wholesale & Distribution

For genset manufacturers, trading companies, and mining/construction company end-user etc,.

Volume Pricing

All tiers include standard export documentation. Framework agreements structured case-by-case based on order history and destination market.

Supply & Consistency

· Source: Direct from CCEC Chongqing — not grey-market or third-party stock
· Lead time: 15–20 business days; priority scheduling for framework holders
· Configuration consistency: All units to Engine Config No. D283021DX02 — ensures uniform spec across repeat orders for production line stability
· Multi-variant: G3 (50Hz) and G9 (60Hz) sourceable under a single supply arrangement

Export Documentation

Standard package supports onward resale and customs clearance in all major import markets: · CCEC certificate of conformance · Commercial invoice (buyer's company name) · Packing list · Bill of lading · Certificate of origin · Insurance certificate (CIF/CNF)

Additional requirements (third-party inspection, specific import permits) accommodated with advance notice at order placement.

Distributor Arrangements

No formal published program. Exclusive regional arrangements considered case-by-case for buyers with demonstrated market presence and consistent volume — contact us with your market background and projected annual quantity.

Payment Terms

· T/T: 30% deposit · 70% against copy of bill of lading
· L/C: Irrevocable at-sight accepted
· Deferred payment: Available for established accounts — contact us to discuss

FAQ

Q1: What is the difference between the KTA50-G3 and KTA50-G9?

The G3 is rated for 50Hz applications at 1500 RPM (1097 kW prime); the G9 is rated for 60Hz at 1800 RPM (1384 kW prime). They are not interchangeable — selecting the wrong variant for your grid frequency will result in incorrect output voltage and frequency regulation.

Q2: What generator set output does the KTA50-G3 support?

The KTA50-G3 is the standard prime mover for 1000–1250 kW, 50Hz diesel generator sets. At 1097 kW prime power, it provides approximately 10% headroom above a 1000 kW genset rating, which is the standard design margin for continuous-duty applications.

Q3: What is the difference between prime power and standby power?

Prime power (1097 kW) is the maximum output the engine can sustain indefinitely with a variable load — the correct rating for main power supply applications. Standby power (1227 kW) is available for emergency backup only, not to exceed 200 hours per year at that output level; using standby rating as a continuous operating baseline will shorten engine life significantly.

Q4: Is the KTA50-G3 a genuine Cummins engine or a Chinese copy?

The KTA50-G3 is manufactured at Chongqing Cummins Engine Co. (CCEC), a joint venture in which Cummins USA holds 50% equity — it is factory-genuine, not a licensed copy or aftermarket imitation. Authenticity can be verified at delivery via Engine Config No. D283021DX02 on the dataplate and the accompanying CCEC certificate of conformance.

Q5: What is the fuel consumption of the KTA50-G3?

Fuel consumption at rated prime power is 254 L/kW·h. Actual consumption varies with load factor — engines running consistently below 60% load will show reduced efficiency and are prone to wet stacking on the PT fuel system; optimal load range is 70–85% of prime power rating.

Q6: Does the KTA50-G3 require electronic diagnostic tools for maintenance?

No — the Cummins PT fuel system is mechanically governed and does not require ECM, diagnostic software, or electronic test equipment for routine maintenance. PT pump calibration and injector matching do require a Cummins-authorized service center with a calibrated PT test bench, but this is periodic and schedulable rather than fault-driven.

Q7: Can the KTA50-G3 operate in cold climates?

The engine cold-starts without auxiliary heating down to −12°C. For installations where ambient temperatures regularly fall below −12°C — northern mining operations, high-altitude sites, or arctic-climate deployments — a jacket water heater system is required; contact us for compatible auxiliary heating specifications at time of order.

Q8: What is the recommended overhaul interval for the KTA50-G3?

In-frame overhaul is typically scheduled at 15,000–20,000 operating hours under normal load conditions; complete overhaul at 30,000+ hours or after the second in-frame. Actual intervals depend on load profile, fuel quality, and adherence to oil and filter change schedules — consult the CCEC Operation and Maintenance Manual for site-specific guidance.

Q9: Which overhaul kit fits the KTA50-G3?

The KTA50-G3 uses overhaul kit IFK1241-K50, applicable to all 13.9:1 compression ratio variants across CPL codes 968, 1219, 1254, 1528, 1544, 1657, 2159, 2227, 2527, 2533, 6229, 6230, 6231, 6240, and 6241. If you are unsure of your CPL code, send us a photo of your engine dataplate and we will confirm the correct kit before you order.

Q10: What are the shipping terms and lead time?

Standard lead time is 15–20 business days from order confirmation, shipping FOB Shenzhen. CIF and CNF pricing is available with destination port details. Sea freight transit is typically 20–35 days depending on destination; air freight is available for urgent requirements at additional cost.

Q11: Can I order parts separately without purchasing a complete engine?

Yes — we supply KTA50-G3 parts independently of engine orders, including overhaul kits, injectors, PT pumps, turbochargers, cylinder heads, and filters. Contact us with your engine serial number and CPL code for parts availability and pricing.

Q12: What alternators are compatible with the KTA50-G3 for a new genset build?

The KTA50-G3 is commonly paired with Stamford and Marathon alternators in 1000–1250 kW genset configurations. The flywheel housing is FH 6024 with SAE standard coupling dimensions; confirm SAE bell housing size with your alternator supplier to ensure correct coupling selection.

Cummins KTA19-G4 Generator Drive Engine

Cummins KTA38-G2B Generator Drive Engine

CCEC Cummins NTA855-G2A 310 kW Generator Drive Engine