The student should describe the working principle of the induction transformer, the transformer equations, the vector diagram of the ideal and real transformer, and the materials for the windings and core. A special review is given to the techniques of measuring the resistance of transformer windings. Using measuring systems UT 206 A and Megger AVO DLRO 10, perform measurements on transformers 10/0, 4 kV/kV and 35/10 kV/kV of different powers and draw conclusions about the correctness of the transformer from the aspect of the amount of winding resistance.