The ambient temperature is described in DIN EN 60204-1. It describes the temperature in electronics that guarantees optimum operation of electronic components or systems. If the ambient temperature is not maintained, components and systems can have low efficiency and the service life of the products can be reduced. In addition, failure to comply with the ambient temperature for electronic devices may result in the risk of destruction, i.e. complete failure of the respective component or machine. A standard transformer runs in an ambient temperature of 40°C. Exceptions are possible.
The rated ambient temperature is the highest temperature at which the transformer can be operated continuously under specified operating conditions. Unless otherwise agreed, the transformers are designed for a maximum ambient temperature of 40°C.
The transformers must be installed in such a way that the necessary cooling is ensured. This must be observed especially in enclosures with a high degree of protection. Transformers with cooling channels must be installed so that the channels run vertically. Deviating from 40°C ambient temperature, the rated power must be reduced for higher temperatures according to the following table.