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The paper describes how to use a split brush with increased service life. Serial brushes were compared with those proposed by design, reliability and cost characteristics. The authors propose a method of how to improve the design of serial brushes and demonstrate a dynamic performance curve.

The paper covers the basic principles of the quality management system applicable in Magnitogorsk Iron & Steel Works (hereinafter - MMK PJSC or MMK). The authors refer to various monitoring methods and methods allowing a conclusion on the acceptability of a particular system, describe the types of work performed to improve and facilitate the growth of the company, and apply a new approach to quality management (Group certification) based on a single regulation. Based on the study of the matter described in this paper, a conclusion can be made that this system is necessary for coordinating the further performance of the entire company and its subsidiaries.

This paper covers the matter of troubleshooting in urban electric transport and electrical equipment. The solution to this issue requires transferring the qualitative determination of the health of the equipment to some quantitative basis. The formalization of qualitative definitions is a prerequisite for constructing formal (computable) troubleshooting algorithms.

This paper looks into the possibilities of designing an integrated quality management system for the operation of power equipment to ensure the fabrication of competitive products, increase the reliability and safety of production.