Special transformers are used in industry and in special applications in the grid. They are produced in small numbers and often have to cope with overcurrents, overvoltages and reactive loads under severe conditions.

This requires special consideration of each of the following transformers. Special transformers require a longer design and manufacturing process than standard type power transformers.

Special transformers are considered the pinnacle of the transformer industry due to the know-how, rigour and accuracy required by both design and manufacturing technology.