What happens to a transformer's lifespan when it operates in too high an ambient temperature?

When a transformer operates in too high an ambient temperature, its lifespan is reduced due to several factors. Elevated temperatures can lead to increased thermal stress on the insulation systems used within the transformer. Insulation deteriorates more quickly at higher temperatures, which can result in breakdowns and failures over time.

Additionally, excessive heat can increase the resistance in windings, leading to higher losses in the form of heat generation, further compounding thermal issues. High ambient temperatures may also result in the need for additional cooling measures, which may not be entirely effective or can fail, exacerbating the problem.

In summary, prolonged exposure to high temperatures accelerates aging processes within a transformer's components, ultimately shortening its operational lifespan. This is critical for understanding transformer maintenance and operational practices, as managing temperature is key to ensuring a transformer functions effectively and has a long service life.