When to choose epoxy and when to choose oil transformer
Choosing the right transformer is not just a technical matter, but a decision that will affect its safety, maintenance and long-term operating costs. The most common types of transformers include epoxy and oil-immersed transformers. But when to choose which one? Let’s take a look at their advantages, disadvantages and the situations in which they are best applied.
What sets them apart
The oil-immersed transformer is filled with a special insulating oil that dissipates heat while insulating the internal components of the equipment.
The epoxy transformer has windings flooded with epoxy resin, it does not need any liquid, so it is often referred to as dry-type.
When to opt for an epoxy transformer
This type is ideal wherever safety, cleanliness and ease of operation are a priority. We recommend it for buildings where people move around, such as shopping centres, hospitals, schools and offices. It is used in interiors with limited space and a requirement for low noise levels, but also in places with strict fire and environmental standards.
There is no risk of oil leakage and the fire risk is also lower than that of an oil-immersed transformer. The epoxy transformer features minimal maintenance requirements and installation is simple and quick. However, the purchase price can be higher and the performance also has its limitations.
V BEZ TRANSFORMÁTORY We manufacture dry-type transformers with a capacity of up to 10,000 kVA and a maximum equipment voltage of up to 36 kV. Due to their high seismic resistance and low power losses, these devices are also suitable for harsh environments.
When to choose an oil transformer
Oil-immersed transformers offer high performance and are suitable for harsher outdoor environments. They are part of substations, energy-intensive industrial plants and locations where heavy loads or extreme climatic conditions are expected. High performance goes hand in hand with efficient cooling. With proper maintenance, the oil transformer is characterized by a long service life.
However, there is a higher risk of fire, so regular maintenance is always advisable, whether it concerns checking the oil or the filter systems. In addition, it is not suitable for confined spaces in buildings.
Company BEZ TRANSFORMÁTORY is one of the leading manufacturers of oil-immersed transformers in Central Europe with more than 120 years of history. It manufactures distribution transformers with outputs from 25 kVA to 16 MVA and with maximum equipment voltages up to 38.5 kV. They are characterized by maintenance-free operation, high reliability, the possibility of using environmentally friendly dielectrics and energy efficiency.
Quick comparison
In conclusion, both dry (epoxy) and oil-immersed transformers from our company represent the top in their category. However, the choice between them depends mainly on the specific application and operating environment.
Epoxy transformers are characterized by their high level of safety, minimal maintenance and compact design, which will be appreciated in interiors, commercial buildings, hospitals or data centers. Thanks to the advanced epoxy resin potting of the windings, they can withstand moisture, dust and vibration and do not pose a risk of liquid leakage.
On the other hand, oil-immersed transformers are superior in robustness, higher performance and excellent cooling. This makes them ideal for industrial plants or power distribution networks.
Simply put, if you are looking for a maintenance-free and safe solution for your building, choose a dry-type transformer. However, if you need high performance and operation in harsh or outdoor environments, reach for an oil-immersed one. In either case, however, you can rely on the company’s quality and experience BEZ TRANSFORMÁTORY.
With more than 120 years of history, modern production facilities and exports to dozens of countries around the world, we are one of the leaders in Central Europe. We specialize in the production of both oil and epoxy transformers that meet the most stringent technical and environmental standards. We are able to adapt our solutions to different sectors, from industry and energy to renewables and public buildings.
So if you are looking for a reliable partner in the transformer field, contact us. With us, you get a long-term partner with a strong focus on reliability, safety and lasting value.
