An autotransformer is a custom transformer which only utilizes one winding that is tapped at a calculated point along the winding. Voltage is applied across a terminal of the winding, and a higher (or lower) voltage is produced by design across another portion of the same winding. The equivalent power rating of the autotransformer is lower than the actual load power rating.

Dufrane can produce an Autotransformer as a build-to-print transformer or custom winding based on your own design, of course – but we can also design and build an Autotransformer to your project requirements!

Please contact us for all of your custom transformer needs or to discuss your application!