Oil-type transformers are used in power distribution or electrical substations. Their core and coils are immersed in Oil, which cools and insulates. Oil circulates through ducts in the coils and around the coils and core assembly, moved by convection.
Oil Transformer Work
The windings and core are submerged in transformer oil. It acts as a cooling agent and an insulator. Convection moves the oil through the windings, coils, and core, keeping the transformer from overheating. Oil is further cooled externally at lower voltage and in an air-cooled radiator with higher voltages.
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