This is a very common question in the electrical industry. After all, what's the difference between a transformer and an autotransformer? See the main differences between them in this article.

The transformer can transfer electrical power from one circuit to another by inducing current. The transformer is composed of two windings of different conductors that wrap around the same iron core. This separation between the windings is what gives the transformer its advantage.

The autotransformer can achieve the same power induction to a circuit, with alteration of voltage and current, but unlike the transformer, it uses only one winding for this.

The unique construction of an autotransformer guarantees it certain advantages: autotransformers have better efficiency and will experience less voltage drop. Another significant advantage is a reduced price when compared to conventional transformers.