06/08/2022
***Dry-Type Transformers vs. Oil-Filled Transformers: Key Differences
Take a look at the differences between dry-type and oil-filled transformers to understand how they perform.
1- Cooling Medium
Transformers overheat under load. They need a cooling medium to prevent overheating and potentially causing a fire or explosion.
The most significant distinction between the two transformers is their cooling medium. Dry-type transformers employ air as a cooling medium, while oil-filled ones, as the name suggests, use oil.
2- Maintenance
Oil-filled transformers are more high maintenance than dry-type ones. Oil-filled transformers require additional attention because the oil must be tested for chemical contamination regularly. Additionally, they require oil filtration at least once a year.
Dry-Type Transformers, on the other hand, are chemically resistant. Even if a minor event occurs, they do not need to be disconnected from the grid.
3- Operational Cost
You might assume that oil-filled transformers entail higher costs than the dry types. However, the reality is the contrary.
Oil-filled transformers are less expensive because they use conventional energy efficiency, making them dependable and long-lasting. Dry transformers use more energy and entail a higher operational cost.
4- Recyclability
Dry-type transformers have a restricted coil recycling at the end of their service life, whereas oil units have a much easier core recycling.
5- Efficiency
Oil-filled transformers are more efficient than dry-type transformers, which are larger and have a lower voltage rating. Thus, the dry types are more prone to overheating during overload, resulting in higher electrical losses and maintenance costs.
6- Location
This is arguably the most significant consideration when choosing a transformer and a major difference between the two. Oil-filled transformers are typically installed outdoors due to the risk of an oil spill, which could pose a serious threat.
Dry-type transformers are specifically utilized in buildings since they are less hazardous and safer for the environment. They’re also less explosive, so they’re utilized in malls, offices, hospitals, etc.
