Wärtsilä
Wärtsilä 12V34SG
34SG
Wärtsilä 12V34SG — 435.9 L V12 four-stroke lean-burn spark-ignited gas engine generating set (Wärtsilä 34SG), for power plants. 5840 kWe at 750 rpm / 50 Hz, 5580 kWe at 720 rpm / 60 Hz; electrical efficiency 48%.
Overhaul & repair parts- Manufacturer files
- 2 datasheets
- Last updated
- 2026-06-08
- Package route
- gas generator sets
- Prime Power · 50 Hz
- 7,300 kVA
- Electrical Output
- 5,840 kWe
- Cylinders
- V12
- Displacement
- 435.9 L
- Rated Speed
- 750 / 900 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
50 Hz750 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | — | 5840 | 7300 |
60 Hz900 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | — | 5580 | 6975 |
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Wärtsilä 12V34SG generator set context
The Wärtsilä 12V34SG is listed here as a natural gas generator-drive engine for 50 Hz and 60 Hz generator sets, with a headline 7,300 kVA / 5,840 kWe / prime rating. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
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Technical Specifications
| Brand | Wärtsilä |
| Model | 12V34SG |
| Series | 34SG |
| Configuration | V12 |
| Cylinders | 12 |
| Displacement | 435.9 L |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | Finland |
Frequently asked questions
What is the power output of the Wärtsilä 12V34SG?
The Wärtsilä 12V34SG is rated at 7,300 kVA prime at 50 Hz (750 rpm); and 6,975 kVA prime at 60 Hz (900 rpm).
Does the 12V34SG run at 50 Hz or 60 Hz?
The Wärtsilä 12V34SG is available for both 50 Hz (750 rpm) and 60 Hz (900 rpm).
What fuel does the Wärtsilä 12V34SG use?
The Wärtsilä 12V34SG is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the 12V34SG?
The Wärtsilä 12V34SG is a V12 (12-cylinder) engine with a displacement of 435.9 L.
What is the catalog status of the Wärtsilä 12V34SG?
The Wärtsilä 12V34SG is marked active in this database. Confirm current production and availability with the manufacturer; catalog status is not a live supply check.
Are reference documents available for the 12V34SG?
This page links reference documents for the Wärtsilä 12V34SG. Check each document's title, model coverage, revision and rating conditions before using it for selection.