VTA28 product render

Diesel VTA28-Series

Frequency (Hz) 50, 60
Fuel Type Diesel
Rated for kW kVA
Standby 560-662 700-828
Prime 517-547 646-683


Rental (G-Drive) Prime (G-Drive) Movie Site Intermodal Rail (G-Drive) Dynamic / Rotary UPS Crushing / Mining Oil and Gas (G-Drive) Standby (G-Drive)


Cost effective power.

The product of years of technical development and improvement, the VTA28-Series is recognised globally for its performance under even the most severe climatic conditions, and widely acknowledged as the most robust and cost effective diesel engine in its power range.

Key design features include two large capacity aftercoolers for more efficient combustion, dual camshafts for precise control valve and injector timing, a cooling system boasting a more even flow of coolant around the cylinder liners, valves and injectors, and Cummins PT self-adjusting fuel system for overspeed protection independent of the main governor.

Note: VTA28-G5 engine specifications are unique for either 1500rpm (50Hz) or 1800rpm (60Hz) operation.

Generator Model Hz Prime kVA / kW Standby kVA / kW RPM Fuel Type Certification Spec Sheet
VTA28-G6 50 828 / 662 1500 Diesel Non-Regulated PDF
VTA28-G5 50 646 / 517 700 / 560 1500 Diesel Non-Regulated PDF
VTA28-G5 60 683 / 547 750 / 600 1800 Diesel Non-Regulated PDF

Aftercooled Two large capacity aftercoolers result in cooler, denser intake air for more efficient combustion and reduced internal stresses for longer life. Aftercooler is located in engine coolant system, eliminating need for special plumbing.

Bearings Replaceable, precision type, steel backed inserts. Seven main bearings, 5.75 in. (146 mm) diameter. Connecting rod bearings 3.75 in. (95 mm) diameter.

Camshaft Dual camshafts precisely control valve and injector timing. Lobes are induction hardened for long life. Fourteen replaceable precision type bushings 2.0 in. (51 mm) diameter.

Connecting Rods Drop forged, I-beam section 12 in. (305 mm) center-to-center length. Rifle drilled for pressure lubrication of piston pin. Rod is tapered on piston pin end to reduce unit pressures. Rods are removable through cylinders.

Cooling System Belt driven centrifugal water pump. Large volume water passages provide even flow of coolant around cylinder liners, valves and injectors. Dual modulating bypass thermostats regulate coolant temperature.

Crankshaft High tensile strength steel forging with induction hardened fillets and journals. Fully counterweighted and dynamically balanced.
Cylinder Block: Alloy cast iron with removable wet liners. Cross bolt support to main bearing cap provides extra strength and stability.

Cylinder Heads Alloy cast iron. Each head serves three cylinders. Drilled fuel supply and return lines. Valve seats are replaceable corrosion resistant inserts. Valve guides and cross head guides are replaceable inserts.

Cylinder Liners Replaceable wet liners dissipate heat faster than dry liners and are easily replaced without reboring the block.

Fuel System Cummins PTTM self-adjusting system. Integral dual flyweight governor provides overspeed protection independent of main governor. Camshaft actuated fuel injectors give accurate metering and timing. Fuel lines are internal drilled passages in cylinder heads. Spin-on fuel filter.

Gear Train Timing gears and accessory drive gears are induction hardened helical gears driven from crankshaft and located at front of block.

Lubrication Large capacity gear pump provides pressure lubrication to all bearings and oil supply for piston cooling. All pressure lines are internal drilled passages in block and heads. Oil cooler, full flow filters, and bypass filters maintain oil condition and maximize oil and engine life.

Pistons Aluminum alloy, designed to compensate for thermal expansion assures precise fit at operating temperatures. Oil cooled for rapid heat dissipation. Two compression and one oil ring.

Piston Pins Full floating, tubular steel retained by snap rings 2 in. (51 mm) diameter.

Turbocharger Two Holset turbochargers mounted at top of engine. Turbocharging provides more power, improved fuel economy, altitude compensation, and lower smoke.

Valves Dual 1.875 in. (48 mm) diameter poppet type intake and exhaust valves. Wear resistant face on exhaust valves.

Vibration Damper Standard configuration equipped with a rubber member damper, recommended for use with all 1800 RPM ratings. 1500 RPM ratings should use the viscous damper.

To protect public health and conserve our planet's natural resources, legislation from the U.S. Environmental Protection Agency (EPA) and regulatory agencies in the European Union (EU) has, for the past decade, required that pollutants produced by diesel engines - such as nitrogen oxides (NOx), hydrocarbons (HC) and particulate matter (PM) - be reduced.

Throughout this time, Cummins Inc. has been at the forefront of the move to meet these new standards, becoming:

  • the first manufacturer to introduce EPA Tier-2 and Tier-3 products to the market - ahead of the regulatory deadline;
  • the first manufacturer to introduce EU Stage IIIA compliant generator-drive diesel engines to Europe;
  • the leader in innovative emissions solutions that focus predominantly on in-cylinder design improvements to eliminate most of the NOx, HC and PM before they are formed.

As a result, our diesel engines are not only very clean, but also retain all of their performance advantages without exhaust after treatment strategies that add cost and complicate maintenance for end users.

G-Drive Engines

  • Mid-range (1.3 - 9L) medium-horsepower engines (16 to 476 hp), providing the broadest Tier 3 range which further reduce Tier 2 NOx levels by 38%
  • Heavy duty (11 - 15L) 415 to 755 hp engines powering commercial operations
  • High-horsepower (19 - 78L) 675 to 3700 hp at both 1500 and 1800 rpm, designed to meet Tier 2/Stage II emissions requirements for electronics and diagnostics, base engine and turbocharging, power cylinder and fuel systems

Cummins Power Generation provides the best warranty and extended warranty plan in the industry. You can expect Cummins Power Generation and its authorized warranty locations to:

  • Stand behind Cummins Power Generation products.
  • Repair all failures that are a result of defects in materials or factory workmanship by Cummins Power Generation, or arrange for OEM warranty service if component is from another manufacturer.
  • Provide the benefit of the coverage immediately.
  • Treat all customers fairly and consistently.

For specific information regarding your warranty, or for more information regarding our warranties contact your nearest distributor.

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