What is the life expectancy of an oil-filled transformer?

The life expectancy of an oil-filled transformer typically ranges from 30 to 50 years, depending on several factors such as operating conditions, maintenance practices, and environmental influences. Regular monitoring and maintenance, including cleaning and regeneration of the insulating oil, play a crucial role in prolonging the lifespan. Neglecting these aspects can lead to issues like insulation degradation or even catastrophic failures, including an oil-filled transformer explosion. Properly maintaining the transformer and its oil can significantly enhance its longevity and efficiency while reducing the risk of unexpected incidents.