What is biodegradable transformer oil?

Biodegradable transformer oil is an environmentally friendly insulating oil made from natural esters, such as vegetable oils. These oils are designed to provide the same insulating and cooling properties as traditional mineral oils but with the added benefit of being biodegradable. This means that in the event of a spill, the oil breaks down more quickly and poses less of a threat to the environment. Biodegradable transformer oils are increasingly used in environmentally sensitive areas and for «green» power initiatives.