Dry Type vs Oil Immersed Transformer: Complete Comparison Guide
Choosing between dry type and oil immersed transformers is one of the most common decisions in power distribution planning.
Key Differences
| Criteria | Dry Type | Oil Immersed |
|---|---|---|
| Fire Safety | Excellent | Requires protection |
| Maintenance | Maintenance-free | Regular oil testing |
| Initial Cost | 20-40% higher | Lower |
| Installation | Indoor, no containment | May require oil pit |
Best Applications
Dry Type: Indoor installations, fire-sensitive areas, data centers, roof-top installations.
Oil Immersed: Outdoor substations, industrial plants, rural electrification, large-scale solar farms.
Conclusion
Choose dry type when fire safety and maintenance-free operation are priorities. Choose oil immersed when cost efficiency and outdoor use are needed.
