Maintenance Of Electrical Equipment Research Articles

Discussion on Maintenance and Management Measures of Mechanical and Electrical Engineering Equipment

Discussion on Maintenance and Management Measures of Mechanical and Electrical Engineering Equipment

Discussion on Electrical Automation Transformation and Maintenance of Mechanical and Electrical Equipment in Cement Plant

Discussion on Electrical Automation Transformation and Maintenance of Mechanical and Electrical Equipment in Cement Plant

Discussion on the Application of Fault Diagnosis Technology in the Maintenance of Mechanical and Electrical Equipment in Coal Mine

Discussion on the Application of Fault Diagnosis Technology in the Maintenance of Mechanical and Electrical Equipment in Coal Mine

Research on Condition-based Maintenance of Electrical Secondary Equipment

Research on Condition-based Maintenance of Electrical Secondary Equipment

Research on Management and Maintenance of Coal Mine Underground Mechanical and Electrical Equipment

Research on Management and Maintenance of Coal Mine Underground Mechanical and Electrical Equipment

Maintenance of Tunnel Electrical Equipment

Maintenance of Tunnel Electrical Equipment

Пристрій для оцінювання витрачання робочого ресурсу обмоток силового масляного трансформатора

A power transformer is one of the most responsible and expensive assets in power systems and networks. Failure of a power transformer can lead not only to downtime of the entire electricity transmission path, but also to danger to personnel and the environment. One of the main reasons for the failure of a power transformer is the deterioration of the insulation of the windings. The insulation of the transformer windings is affected by many different factors, but one of the main factors is the effect of temperature due to the different values of the currents flowing through the transformer windings. The power transformer is exposed to the effects of long-term and short-term loads. There are known methods and tools that allow you to assess the technical condition under long-term loads. In the literature, less attention is paid to the issue of the influence of short-term loads, although their influence on the thermal aging of the winding insulation is obvious. The author has developed a method and a mathematical model that allows to estimate the thermal effect on the insulation of the windings regardless of the duration of such an effect. The essence of the method is based on the determination of the amount of heat that is released when the current flows through the windings with the subsequent heat spread over the windings and structural elements of the transformer, which allows you to build a temperature distribution surface from the point of heat release. The paper proposes the structure of the device for estimating the residual working life of the insulation of the power transformer, which is based on the basis of the developed mathematical model. The article describes the implementation of this approach in detail. It is important to add that the proposed method does not require significant capital investments and meets the requirements of accuracy and reliability. The developed tool can be recommended for use by energy companies in the tasks of diagnosing power oil transformers, which can be integrated into the monitoring system of all electrical equipment of the distribution device of a power plant or substation, which allows to reduce in a certain way the costs of maintenance of electrical equipment.

An Improved Biometric Fuzzy Signature with Timestamp of Blockchain Technology for Electrical Equipment Maintenance

The power infrastructure of the power system is massive in size and dispersed throughout the system. Therefore, how to protect the information security in the operation and maintenance of power equipment is a difficult problem. This paper proposes an improved time-stamped blockchain technology biometric fuzzy feature for electrical equipment maintenance. Compared with previous blockchain transactions, the time-stamped fuzzy biometric signature proposed in this paper overcomes the difficulty that the key is easy to be stolen by hackers and can protect the security of information during operation and maintenance. Finally, the effectiveness of the proposed method is verified by experiments.

COMBINATORY APPROACH TO FAILURE FINDING IN PASSENGER CAR ELECTRICAL EQUIPMENT SYSTEM

Maintaining a high level of maintenance of electrical equipment in passenger cars requires research in the field of improving methods and means of technical diagnostics. Electronic devices for automatic control and protection, which are located in the switchboard of the car, are one of the most critical elements in the electrical equipment system, ensuring its reliable, efficient and safe operation. If the automatic adjustment and protection devices are out of regulation during operation, the voltage and current in the electrical equipment network may exceed the permissible level, which leads to the failure of electricity consumers, a battery and a generator. In addition, the semiconductor devices themselves are very sensitive to short-term overloads, in which, even with minor overloads, a breakdown or breakage of the conductive layer occurs. Modern trends in the development of passenger car fleet indicate a sharp increase in the complexity of the element base of cars. This mainly concerns the electrical systems of cars, where all the functions of control, monitoring and diagnostics are performed by electronics. Maintaining a high level of service for such systems requires research in the field of improving methods and means of technical diagnostics. For these purposes, the authors have developed a method for constructing optimal control and diagnostic tests, which is based on a combinatorial approach. The method is easily implemented on a computer.

Preventive Maintenance of Electrical Primary Equipment in Power Plant

Preventive Maintenance of Electrical Primary Equipment in Power Plant

Technical Analysis of Operation Maintenance and Fault Repair of Electrical Equipment in Hydropower Station

Technical Analysis of Operation Maintenance and Fault Repair of Electrical Equipment in Hydropower Station

Design of Motor Intelligent Monitoring and Fault Diagnosis System Based on LoRa

Aiming at the characteristics of low intelligence of the current motor cluster and superconducting electrical equipment monitoring system, high construction and maintenance costs of wired transmission methods. The wireless sensor network constructed by LoRa technology is applied to the motor operating state monitoring system, while the data transmission efficiency of the system is improved by optimizing the topology of the wireless sensor network (WSN) and processing the transmission data redundancy. The system uses STM32F407ZET6 as the main controller, builds an offline operating state library, and uses HMM model for training to achieve real-time acquisition and fault diagnosis of the status information of the cluster system motor's voltage, current, speed, and position. Practical application shows that the system is running well and can realize the acquisition of the motor's running status and fault diagnosis.

FEATURES OF FUTURE ELECTRICIANS’ PROFESSIONAL TRAINING FOR REPAIR AND MAINTENANCE OF ELECTRICAL EQUIPMENT IN VOCATIONAL EDUCATION INSTITUTIONS

The article analyzes the regulatory framework for future electricians’ professional training in the repair and maintenance of electrical equipment in vocational education institutions. A typical basic structure for the training of skilled workers has been presented in the article. Subjects that are included in general professional training, professional-theoretical training, professional-practical training are indicated. It has been emphasized that the standard basic structure establishes the total amount of time and its division into sections of working curricula of vocational training in professions for which the state standards of vocational education or standard curricula are not approved. The educational institution on the basis of the Standard basic structure independently determines the forms and methods of training, the term of vocational training, the content and frequency of control overtraining. According to the author, the distribution of general and vocational subjects should be as follows: general education creates a basis for general technical, and that, in turn, for special vocational. Ways to improve the educational process in vocational education institutions have been outlined, taking into account the problem of the relationship between general education and vocational training. It is emphasized that the relationship of general and vocational education ensures the formation of professionally significant qualities of the student's personality, because it contributes to the formation of a positive attitude to work in general, to his profession, which becomes the primary source of creative personality of the future specialist. The relationship of general and vocational education provides the formation of professionally significant qualities of the student's personality because it contributes to the formation of a positive attitude to work in general, to their profession, which becomes the primary source of creative personality of the future specialist.

Analysis on Maintenance and Management of Electrical Equipment in Power Plant

Analysis on Maintenance and Management of Electrical Equipment in Power Plant

Thinking about the Repair and Maintenance of Mechanical and Electrical Equipment

Thinking about the Repair and Maintenance of Mechanical and Electrical Equipment

Brief Introduction of Heavy Industry Electrical Equipment Repair and Equipment Maintenance

Brief Introduction of Heavy Industry Electrical Equipment Repair and Equipment Maintenance

Decision-making regarding the best maintenance strategy for electrical equipment of buildings based on fuzzy analytic hierarchy process; case study: elevator

PurposeThe purpose of this paper is to propose the best method of maintenance for electrical equipment of a building and especially elevators in order to achieve various benefits.Design/methodology/approachLiterature review shows that there are various methods such as corrective maintenance, condition-based maintenance, time-based maintenance and reliability-centered maintenance (RCM) for the maintenance of electrical equipment of a building. Selecting the most appropriate maintenance method, especially in large buildings such as commercial ones, is a multiple-criteria decision-making problem. To solve this problem, the fuzzy analytic hierarchy process is used in the present study. It considers the uncertainties of the experts' judgments to provide an optimized maintenance method.FindingsTheoretically, the RCM method will take a lot of time and cost. But in prioritizing the methods, RCM gained more points with regard to safety criteria and value added. The main finding of this study suggests that RCM can be used in the case of elevators and would improve the safety and reliability of buildings.Originality/valueThe authors believe that this study will be valuable because one of the problems in building maintenance complexes is the lack of knowledge about the best method to prevent the risks of elevators. The proposed method has compared with other methods in various sub-criteria, and the results have been fully analyzed.

Воздействие сочетанных вредных производственных факторов на развитие коморбидной патологии у мужчин, работающих на крупном промышленном предприятии г. Тюмени

Aim. To establish the strength and direction of the correlation between the comorbidity index depending on the combined impact of harmful production factors in men working at a large industrial enterprise in Tyumen. Materials and methods. A single-stage retrospective cohort study of working men in industrial conditions was carried out. Anamnestic, clinical, laboratory, biochemical, instrumental methods were used. Diagnoses were made on the basis of modern clinical guidelines criteria. The groups were comparable in age and formed depending on the number of harmful production factors. Study group n = 52 – men with multiple 3-5 harmful production factors (industrial noise, general vibration, height at work, exposure to welding aerosol, night shifts, static stress) as the number of the following professions increases: crane operators, bulldozer operators, and compressor installations, fitters, electricians for maintenance of electrical equipment, batchers of concrete components. mixtures, electric and gas welders, Kamaz drivers of the 2nd class, locksmiths, repairmen, molders of reinforced concrete products and structures, loaders, operators of the equipment control panel, installers, plumber on duty; their average age in the group was 44.8 ± 14.7. Control group n = 50 – men with 1-2 harmful production factors (industrial noise, static stress) as the number increases in the presence of the following professions: site managers, janitor, auxiliary workers, class 1 bus drivers, construction and installation work foremen, fitters for the repair and maintenance of gas equipment, concrete workers, carpenters; their average age in the group was 43.8 ± 16.2. Results. Between the combined effects of harmful production factors with the comorbidity index, a direct strong correlation was established r = 0.841 ***, p < 0.001 (95% CI 0.672-0.926) according to the Pearson method in the study group, whose experience was 2.2 years longer, then as in the control group, no statically significant correlation was found r = 0.339, p > 0.05 (95% CI -0.065-0.647) according to Pearson’s method. Conclusion. The combined effect of 3-5 harmful production factors is statistically significant with an increase in length of service increases the risk of developing comorbid pathology in men of working age working at a large industrial enterprise, which increases the 10-year risk of fatal complications.

Research on Fault Prevention and Maintenance of Electrical Automation Equipment

Research on Fault Prevention and Maintenance of Electrical Automation Equipment

Current Situation and Countermeasure of Mechanical and Electrical Special Equipment Maintenance

Current Situation and Countermeasure of Mechanical and Electrical Special Equipment Maintenance