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Currently operating on the network of Russian Railways passenger electric locomotives, while driving trains on different difficulty stages, not equally utilize the available capacity and work with different energy performance. The purpose of the work is to consider the energy efficiency of passenger electric locomotives when driving trains on certain sections of Railways and to determine ways to improve their energy performance. To achieve this goal, the work of passenger locomotives EP1 and EP2K on the sections of the mid-Siberian railway was analyzed, the average mass of passenger trains and their speed were determined, the values of the power realized by electric locomotives in operation were calculated, as well as the rational values of the power and mass of locomotives needed for driving passenger trains on the considered sections of the track, and a comparative assessment of the possible operation of electric locomotives with rational values of power and mass with the operated locomotives EP1 and EP2K. On the basis of the comparative analysis, the conclusion is made about the available reserves for increasing the energy indicators of passenger electric locomotives in certain sections of the Russian Railways, such as the operation of locomotives with rational values of power and mass required to provide modern passenger transportation, and the method of determining the energy efficiency of electric locomotives, which allows without calculating the traction and energy characteristics to estimate the cost of electricity for traction of trains.