What type of transformers are designed to cool themselves through radiation?

Large transformers are specifically designed to cool themselves through radiation, which is a crucial aspect of their operation. These transformers typically handle substantial power loads and generate significant heat during service. To manage this heat effectively, they utilize a cooling method primarily based on thermal radiation as well as convection and conduction.

In large transformers, the design incorporates a larger surface area and often includes radiators or fins to facilitate the radiation of heat away from the core and windings. Radiated heat is then dispersed into the surrounding environment, which is vital for maintaining optimal operating temperatures and ensuring efficiency. This contrasts with smaller transformers which may rely more on simpler cooling methods due to their reduced energy output and heat generation.

The question requires identifying the specific type of transformer that utilizes radiation as a primary cooling method. Thus, focusing on the large transformers aligns with their operational needs and cooling requirements.