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The development of traction rolling stock is closely associated with an increase in the maximum traction force for adhesion the wheels to the rails. The negative factor in this aspect of development is slipping. The article proposes a new method of protection against slipping of wheel sets of electric locomotives 2(3)ES5K «Ermak». The method implies redistribution of tractive forces between wheel sets and minimization of sanding. The paper discusses the principle of operation of the anti-slip system and the principle circuit of the power section, and simulates some modes of wheel sets in the Multisim software package.