What is the life expectancy of a transformer? 20, 30, or 40+ years?

In the real world, transformers will be working at reduced average loads which could greatly increase the life expectancy of a transformer.

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What Is The Average Life Expectancy of A Transformer

Power transformers lifetime

What is the Average Life Expectancy of a Transformer ?

What is the formula to calculate the life of an electrical motor

Can You Estimate or Predict The Lifespan of a Transformer?

Need to Take Transformers Beyond EPACT 2005

How Transformers Age

Power transformers lifetime

Reliability calculations based on an enhanced transformer life

Power transformers lifetime