Tramo manufactures various types of transformers


Swedish-made and high-quality autotransformers

Are you looking for a Swedish-made autotransformer with the possibility of fast delivery? Then you have found the right place, we manufacture our transformers in our factory in Eslöv, southern Sweden. Here we manufacture products with short lead times, in both large and small series. Through our service Trafoakuten we offer fast deliveries, even customized autotransformers can often be ready within 48 hours. When it's time for your next electrical project, fill in your specifications for your autotransformer here and we will get back to you with a quote shortly.

What is an autotransformer and how does it work?


Depending on the application and when galvanic separation between primary and secondary is not required, a transformer with common primary and secondary, a so-called autotransformer, can be used. The difference between the highest and lowest voltage determines the dimensions and weight of the autotransformer.

The turnover factor is an important characteristic to consider when choosing a transformer type. For small turnovers, an autotransformer works well, while a full transformer is usually a better choice when the turnover becomes larger.

Common applications of autotransformers are in speed control of fan motors and voltage adaptation for motor drives.


Tramo manufactures several different types of transformers

Autotransformers are one type of transformer we manufacture, read about more here: