We also know that single-phase transformers are made with two windings and, as autotransformers, with just one winding. Fig. 1 shows a single-winding transformer connected for voltage step-down (A) and voltage step-up.
We also know that single-phase transformers are made with two windings and, as autotransformers, with just one winding. Fig. 1 shows a single-winding transformer connected for voltage step-down (A) and voltage step-up.