A3F SERIES

Single-phase and three-phase autotransformers according to CEI EN 61558-2-13. Constructively similar to the equivalent series T1F, T2F and T3F are characterized by a single winding resulting smaller than the transformer with the same power and voltage.

The use of the autotransformer is allowed where there is no need for galvanic separation between input and output voltage.

To find out the dimensions and weight of the autotransformer, use the following formula which will give Pn namely the equivalent overall power to be searched for in the T1F, T2F and T3F: Pn = ((Vmax-Vmin)/Vmax) x VA