What is the flashpoint of transformer oil at 500�C?

The flashpoint of transformer oil is not 500�C; in fact, transformer oil typically has a flashpoint ranging from 130�C to 160�C. This property is crucial for safety, as it indicates the temperature at which transformer oil can vaporize to form an ignitable mixture in air. Operating temperatures in power transformers should always remain well below the flashpoint to prevent fire hazards.