Transformer - Temperature Derating

Dry-type transformer capacity derating for ambient above 40 °C per IEC 60076.

TransformerDeratingTemperature

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

P = P_{rated} \cdot (1 - 0.015 (T - 40))

Symbol	Meaning	Unit
$T$	Ambient temperature	°C

Source: IEC 60076-11 - Dry type

Dry-type transformer capacity derating for ambient above 40 \u00b0C per IEC 60076.