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The article analyzes the test schemes of induction traction motors by the mutual load method using DC generators as load machines and powered by a three-phase AC network with a frequency of 50 Hz. Features of functioning of each of the given schemes of mutual loading are considered. The disadvantages of these schemes are noted, due to the presence of excess equipment or the lack of short-circuit protection in the anchor circuit of the load generator and the complexity of its connection to the DC link. The scheme developed by the authors is proposed, devoid of the noted disadvantages of the known schemes and combining all their advantages, which is the simplest both in the power part and in controlling the process of connecting the armature winding to the DC link of a frequency Converter. A mathematical model of a test system consisting of an induction traction motor, a DC load generator and a two-link static frequency Converter is presented. The mathematical model of this test system is made up of parts corresponding to its individual elements. The presented mathematical model makes it possible to calculate the static and dynamic operating modes of the proposed scheme at the stage of development of an electrical complex for testing induction traction motors. Recommendations on the implementation of developments in the operation of induction traction motors in locomotive repair depots are given. The expediency of implementing the results of work in organizations-developers of test stations for induction traction motors is also noted.

Principal directions for increase of locomotive operating efficiency are determined in the article based on statistical estimates as per data on the main domestic locomotive series. Work ratio is suggested as universal indicator. It is demonstrated that in addition to locomotives' reliability enhancement, increase of the trains' haulage management system efficiency is also a large reserve. It is proven that the number of locomotive units can be reduced at least by 2,000 thous. units.

The article describes the main provisions of the optimized system of the electric locomotives maintenance service and repair, as well as the results of the experiment to increase between-repairs run of the electric locomotives in the Eastern polygon. The author examines the impact of techno-logical preparation of production on the quality of repair and the number of failures in the transi-tion to a more streamlined system. The article proposes a method of calculation of adjustment and development cost of technological documentation, which is an integral part of technological prepa-ration of production. The cost calculation includes qualifications and salaries of industrial engi-neers, the complexity and volume of developed or adjusted technological documentation. The author gives the example of calculation of adjustment and development cost of technological docu-mentation in depot conditions. The economic effect from the implementation of this methodology and optimized system repair shows its effectiveness and viability. Due to the adjustments of techno-logical processes of the electric locomotives repair, the number of failures during operation, dis-covered during the experiment in the Eastern polygon, will decrease. Benefit from the increased between-repairs run and reducing the complexity of some of the repairs will cover the costs of im-plementation of the optimized system.

In the article it is developed a model for the locomotives life cycle managing in their maintenance and repair using automated technical diagnostic systems. Based on statistical analysis of data on the operation of locomotives, the impact of the reliability of the locomotive and its maintenance and repair system on the efficiency of locomotives is theoretically justified. A method of analyzing the technical diagnostic systems effectiveness using the mathematical apparatus of information theory and of predicting the duration of maintenance and repair time with the dynamic use of accumulated statistics on the duration of previous repairs has been developed.

The technique and algorithm of definition of consumption rates of materials on the current maintenance of a way depending on freight density, the passed tonnage, the plan and a profile of sites of a way, axial loadings of a rolling stock is given. Standards are developed on the basis of the analysis of the existing normative documents, statistical data from forms of primary accounting of PU-74 of the consumption of materials, annual reports of linear sites and other sources. Depending on service conditions standards are determined by analytical dependences and the correcting coefficients.

The factors affecting the operational reliability of the assembly platform of a rail service car maintaining the repair and installation on the railways are considered in the paper. An assessment and analysis of a system of quantitative indices of reliability is performed, the methods for their separate determination by mechanical equipment and hydro and electrical equipment is described. The strategy of maintenance and repair combined with the use of methods and means of a modern diagnostic system is considered; it ensures the estimation of the object reliability during its design, operation and repair.

The current state of technological radiocommunication systems was analyzed, prospects of their development were shown in the article, and the necessity of further use of analogue radio communication channels was substantiated. Statistical data analysis of radiocommunication equipment failures used on the South Urals Railway is fulfilled.

The main provisions of the methodological foundations of state management systems, technical operation, the general approach to the creation of the state of systems management techniques and methods of technical operation of destination mileage cars between depot repairs on them. Practical recommendations for the use of freight cars.

The paper discusses the design enterprises for repair in dvizhnogo of railway vehicles, analyzes contemporary experience, are reproduced the main criteria for assessing the quality of design solutions and provides a methodology to optimize them with the use of mathematical modeling.

This article discusses the process of maintenance of railway automation devices. The aim of the work is to reduce labor costs for maintenance of track circuits of railway automation. Presents the method for automating the process of checking on the shunt track circuits shunting sensitivity of track circuit by at cross-rack and scheme of the device that implements this method. The values of shunt resistance equivalent to the imposition of regulatory shunt at predetermined points of the track circuit are calculated. The results obtained in the paper can be used for the improvement of systems of automation of existing railways.

Railway telecommunications are inherent facilities participating in the organization of efficient and safe transport process. Generally, reliable operation of telecommunication devices is provided by the implementation of preventive maintenance that quality analysis is performed on the incidents during the latest reporting period. The possibility of experimental estimation using computer techniques surely has advantages. In the paper, we have defined an objective of the development of a simulation model of the operation process of railway telecommunications so as to assess the inherent availability and maintenance quality indicator. The model allows carrying out a computer experiment and estimation of the abovementioned measures in an automated way taking into account the following input parameters: failure rates, periodicity and length of maintenance, time of repair, the probability of erroneous actions of service staff and the probability of spare and replacement parts lack.

The article deals with the locomotive lifecycle problem at vehicle technical maintenance and repairing service. It proposes to encapsulate the statistic methods into the automatic locomotive depot control system basing on the example of management with the minimum stock spare parts level. In such a group of companies as "Locomotive technologies" the efficacy of maintenance and repairing technological processes is improved by creation and implementation of the information management control system "Network diagram" into the locomotive depot service. Its implementation was started in 2016 and should be completed by the end of 2017. In practice methodological approaches of international (ISO) and national (GOST) standards of management quality and reliability, lean manufacturing and statistic methods of management in conditions of locomotive depot service are proposed to be used basing on the principle of "Built-in quality". In this case logical constructions, algorithms and formulas are encapsulated into “Network diagram” software significantly reducing the training level demands of the depot personnel. The article also proposes to control the minimum level of stock spare parts in the locomotive depot in terms of “Network diagram” software through encapsulation of probabilistic-statistical methods of minimum stock calculation according to the data on intensity of parts consumption and the time of their delivery to the depot.

In article the solution of a task of the organization of operational monitoring of elements of the rolling stock on the basis of the methods of statistical definition of quality which were widely used in the analysis of defects of the current production is considered. The problem is solved on the example of carrying out control and diagnostic operations by results of which realization the conclusion about technical condition of elements of the rolling stock becomes. The approach offered in article allows to consider a posteriori information and by that to optimize the volume of the carried-out works. The received results can be used at the solution of a complex of tasks of decrease in resource intensity of system of repair and the maintenance of the rolling stock.