Abstract
The article deals with the opportunity of using three-phase electric traction system which was operated from the end of XIX century to 1976. A comparison of the suggested system to one-phase electric traction system of alternating current has been conducted. During the research the ratio of the currents and the power losses in the traction networks of one-phase and three-phase systems has been determined. The calculations show that the losses of the electric power in the contact network of one-phase electric traction system is 3.35 times more than in the three-phase system. The influence of current on electro erosion, wear and tear of a contact wire and electric power collector of the runner of an electric rolling stock current-collector, and also, the influence of the intensiveness of the current-collection and the suspension zigzag of the contact wire on the gauge of the current-collector has been researched. The results of the experimental and calculated values of the coefficient of the wear and tear of the contact wire depending on the current of the current-collector have been presented. Three variants of the size of the runner for a small-sized current-collector of an electric locomotive of AC three-phase electric traction system have been suggested.
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