Unit for controlling the resistance of the load connected to the transformer

(57) Abstract: described herein, the essence of which can be realized by a simple control method apparatus, the load (Rz) on the additional resistance (R) that are connected in parallel, and the transformer primary measuring the input resistance side (R1), if the input resistor (R1) deviates a predetermined value, it is an unit for reporting an error of the load (ST) is provided.