What is the typical flash point of transformer oil?

Typical mineral insulating oils used in transformers have flash points that are often in the mid 100s �C range, depending on formulation and test method. The exact value is specified on the product data sheet and is important for fire risk assessments, especially where oil could be exposed to ignition sources. Flash point is not the same as fire point, and both can vary by oil family, for example mineral versus ester versus silicone. Always use supplier data for the specific grade.