The autotransformer has many uses and applications including the starting of induction motors, used to regulate the voltage of transmission lines, and can be used to transform voltages when the primary to secondary ratio is close to unity.

What is auto transformer application?

Applications of Auto transformer

It is used as a starter to give up to 50 to 60% of full voltage to the stator of a squirrel cage induction motor during starting. It is used to give a small boost to a distribution cable, to correct the voltage drop. It is also used as a voltage regulator.

Why auto transformer is used in transmission and distribution?

Auto-transformer is used in the transmission and distribution systems when the transformation ratio for voltage is small. The rating of the transformer and copper saving can be maximized when the transformation ratio is low, i.e. lower than 2.