What is the name of the oil used in transformers?

The oil used in transformers is typically referred to as transformer oil, which is a highly refined mineral oil designed to provide insulation and cooling. It plays a crucial role in maintaining the efficiency and safety of electrical transformers. In addition to mineral oil, some transformers utilize biodegradable or synthetic oils for environmental considerations. The oil in electrical transformers not only insulates but also dissipates heat, ensuring that the transformer operates within its optimal temperature range.