From the course: Electrical Systems: Panel Boards, Frequency Drives, and Transformers

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Oil filled and substation transformers

Oil filled and substation transformers

From the course: Electrical Systems: Panel Boards, Frequency Drives, and Transformers

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Oil filled and substation transformers

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- [Instructor] Transformers that can handle large amounts of electricity for distribution for multiple buildings and factories often become warm because of the large amount of electricity they are using. They need to be cooled using liquid, such as oil. These are called oil-filled transformers. In an oil-filled transformer, the windings and core are submerged completely in the cooling oil. The housing or casing of the transformer usually has cooling fins or some other mechanism for the warm oil to come in contact with a large surface area that can be cooled externally, similar to a radiator. These transformers are usually located outdoors for safety reasons. You may see them in a neighborhood or outside of a business. They're sometimes referred to as substation transformers. Here we see some examples of oil-filled transformers.

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