Why Oil is Required for Transformers

 


The transformer oil provides things that help maintain the transformer's efficiency and durability; one is insulation and another is cooling. It is important for electrical as well as thermal performance of transformers.

A highly refined mineral oil is used as an insulator between transformer’s windings. This insulator prevents electrical breakdown and transformer damage.

In this blog, let us explore four main functions of this oil in a solar transformer or any other type of transformer for that matter.

Four Main Functions of the Transformer Oil

Heat Transfer

When the transformer is working, it produces heat. This heat comes from the electrical load and the surrounding temperature. Let us say the environment is hot; this will add more heat, and the transformer will run even hotter.

To disperse this heat from the core and coil, the transformer requires oil. This oil prevents temperatures from rising to damaging levels.

Dielectric Strength

Both the paper and oil inside a transformer have good dielectric strength. They together contribute a 23% increase in dielectric strength. This extra strength makes the combination of paper and oil a popular choice for insulation in transformers.

Protects the Solid Insulation

This transformer oil protects the paper insulation. As soon as this solid insulation loses its quality or gets damaged, the transformer becomes unreliable.

To bring back the transformer's reliability, either technicians replace it or rebuild the windings and insulation inside.

A Testing Medium

Maintenance engineers or electrical technicians collect a small sample of transformer oil and send it to a laboratory for testing. Once the lab completes the analysis, the team reviews the results to check for signs of aging, contamination, or potential failure. Based on these findings, they take necessary actions, such as oil filtration, repairs, or part replacements, to maintain the health of the transformer and extend its service life.

Looking for reliable transformer manufacturers? With over three decades of experience, Atlanta Electrical has been an industry leader in the 220 kV class of transformers. For example, we offer Power and Auto transformers up to 220 kV and Inverter Duty transformers up to 33 kV. For more options.

visit us at https://aetrafo.com/.

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