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Production automation of transformer components based on industrial robot
Procházka, Petr ; Kubela, Tomáš (referee) ; Pochylý, Aleš (advisor)
The bachelor´s thesis focuses on the automate process of primary transformer´s soldering. My work is to assess proceedings that guarantee that tolerances given by the controlling company shall be as accurate as possible. Final version of the product is modified in such a way to meet a size criterion as well as strength, anti-corrosion, space and price standards. The final version of the product is tested by the robot during the process. The main task is the verification of the size stability during the operation. One of the point of my bachelor´s thesis is to descripe a plan of automate workplace. The main reason for designing a plan of automate workplace is to help employees and facilitate from demanding work in the process of primary coil soldering.
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Dielectric properties of epoxy resins
Matoušová, Klára ; Novák, Vítězslav (referee) ; Kazelle, Jiří (advisor)
This diploma thesis deals with the fundamental properties of epoxide mixtures, as determining of these fundamental properties of epoxide mixtures could in the case of favorable results lead to diminishing the amount of defects in epoxide-embedded instrument transformers. As the influence of effects in the manufacturing process of transformers causing poor quality is very extensit, the biggest emphasis is laid capitally on the influence of the epoxide casting mixture composition. The thesis describes the manufacture technology including used methodics and materials. The compositions of epoxide resins and the mechanisms of their curing. Also, the definitions of fundamental properties of dielectric materials and the description of diagnostic methods used to relative permitivity, dissipation factor and inner resistivity are included. suitable casts of acquired samples were set and dried out within the experimental part, followed by measurement of fundamental electrical properties in temperature and frequency relations. Hereafter a comparison of individual samples and the evaluation of their electrical properties will be carried out.
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Development of voltage instrument transformer resistible against higher harmonics
Mihályi, Róbert ; Odehnal, Martin (referee) ; Bušov, Bohuslav (advisor)
This bachelor's thesis describes the basic principles of transformer operation in the first part. The following chapters focus on issue of higher harmonic frequencies. Then it describes the basic design and principles of instrument transformers, which are the main subject of this work. At present, higher harmonic frequencies are becoming more and more common in electrical networks. Therefore, this work tries to bring new knowledge in the issue of higher harmonic frequencies in instrument transformers. The last chapters describe the computational design of an instrument transformer that resists higher harmonic frequencies. This transformer must be able to transfer these frequencies to the secondary winding. It was necessary to study the standards and technical literature related to this topic in order to create the proposal.
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Development of monitoring device for voltage instrument transformes
Marčok, Samuel ; Odehnal, Martin (referee) ; Bušov, Bohuslav (advisor)
The topic of this bachelor thesis is instrument transformers and development of monitoring device for service purposes. The first chapter of this work is dedicated to a theoretical functionality of instrument transformers. It also deals with the instrument transformer as a separate unit according to norm EN 61869-1. Next chapter depicts instrumental transformer as a part of switchgear UniGear ZS1 (a product of ABB) and its standard working conditions. The results of these two separate chapters are two views of the instrument transformer, the first as a separate device and the second as part of the unit (switchgear), which in each case must be adapted to different conditions. A separate chapter describes the effects of temperature, humidity, pressure, altitude, vibration and discharges on the instrument transformer. The work further explains the physical nature of selected quantities and describes the methods of their monitoring. The conclusion of the work is a summary of the acquired knowledge and a brief overview of the results of the work.
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Drying and preheating in potting process of epoxides
Matoušová, Klára ; Novák, Vítězslav (referee) ; Kazelle, Jiří (advisor)
The bachelor's thesis is dealing with the defects in epoxy resin flooded transformer devices. Since these can be damaged severely in terms of quality by numerous forces, the main focus is dedicated to the impact of moisture. The thesis describes the manufacturing technology including the methods applied and materials used. It further encompasses the composition of epoxy resin and the mechanisms used for their hardening processes. Additionally, the description of the moisture, the impact of adverse forces and the method of their elimination using drying is presented. In the experimental part of the paper, a moisture of the banding materials was measured. On the basis of the results acquired, the paper reaches a conclusion on the ideal time frame of drying, the sufficiency of materials in terms of drying and in two cases two substitutes for contemporary uneasily dryable samples were considered.
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Voltage transformer
Kovařík, Martin ; Huzlík, Rostislav (referee) ; Ondrůšek, Čestmír (advisor)
This bachelor´s thesis focuses on the elements of equivalent circuit parameters of voltage instrument transformer TJC 7-G from the portfolio of ABB. Main focus is placed on correct identification of the leakage reactance of primary and secondary winding, which are used for correct settlement of protections. The measurement is done by using methods of measurement of transformer without load and with short circuited secondary terminal. The values are measured for different frequency levels, in order to determine precisely all the parameters. The theoretical part describes the use of instrument transformers, theoretical creation of equivalent circuit and parameters which affects the accuracy class. The conclusion contains the evaluation of different methods for determining the elements of the equivalent circuit and with its final assembly.
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Design of protection system using an sensor technology in MV substation
Strapko, Miroslav ; Prokop, Václav (referee) ; Topolánek, David (advisor)
Master's thesis deals with use of electronic instrument transformers (sensors) in the protection system in medium-voltage substation. Substation consists of 2 incoming feeders, 2 outgoing feeders for motors, 2 outgoing feeders for power transformers, measuring, bus coupler and bus riser feeder. Incoming feeders are connected to distribution system E.ON by cable lines which were proposed. Protected machines (power transformers and motors with rated power) are connected to switchgear panels of UniGear ZS1 type by cable lines too. Proposed protection system is based on the short-circuit conditions, standard CSN 33 3051 recommendations as well as theoretical backgrounds acquired from technical papers and other publicated literature according to the bibliography. For selected protection functions are defined their parameters. Control, monitoring and protection functions provides REF 542plus relay. Consequently, secondary tests which are part of the commissioning, are given in the practical part of thesis. Secondary tests were performed by relay test system FREJA 300 by Megger. Results of tests are displayed in tripping characteristics.
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Instrument voltage transformers of outdoor type
Velešík, Petr ; Bušov, Bohuslav (referee) ; Vaněk, Jaromír (advisor)
The function analysis of instrument voltage transformer with the aid of his equivalent diagram and his phasor diagrams is main part of my masters thesis. I solve the influence and errors of his equivalent diagram’s elements on this instrument voltage transformer. Than I talk about suitable magnetic materials using for instrument voltage transformers. There are 3D pictures which show lay-out of instrument voltage transformers’s windings and his magnetic circuit.
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Workplace layout design
Hlavatý, Pavel ; Dostál, David (referee) ; Juřica, Pavel (advisor)
The topic of the thesis is the design of workplace layout to improve the handling between workplaces in ABB s. r.o. The theoretical part of the thesis defines the concepts of lean enterprise and workplace layout. The analytical part analyses the workplace layout together with the production process and ergonomic conditions in the workplace. Furthermore, the work activities at the individual workplaces are analysed. Based on the identified shortcomings in the analytical part, suitable and feasible solutions are proposed. In the conclusion of the thesis, the overall benefits and economic costs of the project are evaluated.
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Workplace layout design
Hlavatý, Pavel ; Dostál, David (referee) ; Juřica, Pavel (advisor)
The topic of the thesis is the design of workplace layout to improve the handling between workplaces in ABB s. r.o. The theoretical part of the thesis defines the concepts of lean enterprise and workplace layout. The analytical part analyses the workplace layout together with the production process and ergonomic conditions in the workplace. Furthermore, the work activities at the individual workplaces are analysed. Based on the identified shortcomings in the analytical part, suitable and feasible solutions are proposed. In the conclusion of the thesis, the overall benefits and economic costs of the project are evaluated.
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