DG400 (3-Phase)

More output in a compact package

The Cat® DG400 gas generator set delivers 400 ekW for standby, demand response and limited-time power applications. Its lean-burn CG18 engine combines fuel efficiency with durable construction for steady operation over the long term.

Caterpillar is leading the power generation marketplace with Power Solutions engineered to deliver unmatched flexibility, expandability, reliability, and cost-effectiveness.

Equipment Highlights

High power density

The in-line six-engine CG18 delivers greater output from a smaller engine configuration, allowing more power to fit within a smaller space.

Efficient CG18 engine

Lean-burn operation promotes fuel efficiency, while robust high-speed block construction contributes to prolonged engine life.

Flexible Cat® ECS controls

Expansion modules and customizable programming configure generator operation around individual installation needs.

Strong motor-starting ability

Large connected motors can start during an outage, helping accommodate demanding electrical equipment.

Durable alternator insulation

Class H insulation provides a high level of protection to promote alternator durability over its service life.

Specs + Downloads

Specs

Engine Model: Cat® CG18 In-line 6, 4-cycle Natural Gas
Fuel System: Gas mixer, Venturi
Aspiration: Turbocharged - Air-to-Air Aftercooled
Governor Type: Electronic
Displacement: 1106.3 in³
Compression Ratio: 10.5:1
Bore: 5.7 in
Stroke: 7.2 in

Length: 154 in
Width: 73 in
Height: 82 in
Weight: 10721 lb

Frequency: 60 Hz
Natural Gas Rating: 400 ekW
Emissions/Fuel Strategy: U.S. EPA Certified for Stationary Emergency Application and Non-Emergency Applications
RPM: 1800
Fuel Type: Natural Gas
Voltage: 208 - 600 VAC