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Current transformers 12kV, 4000 / / 5/5A
Šumberák, David ; Vaněk, Jaromír (referee) ; Dostál, Lukáš (advisor)
This master´s thesis describes the development proposal and production of instrument current transformer in one turn primary winding with 4000//5/5 A transfer. The thesis involves a theoretical analysis, a numerical calculation, a developmental 3D model, corresponding simulations and a standard testing of the transformers. There is a complete written description of measuring current transformer cycle from the development to the production. The transformer development and production works were collaborated with the company KPB Intra s.r.o. The company engages in development, production and sale of these kinds of instrument transformers in the Czech Republic and foreign markets.
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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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Analysis of Company Taxes
Benešová, Lucie ; Vaňek, Jaromír (referee) ; Kopřiva, Jan (advisor)
Bachelor thesis is focused on the description of the tax system in the Czech Republic and most taxes paid in the selected companies. At the beginning I explain the basic concepts that occur in taxation, define individual taxes on my practical part. In the practical part, I focus on four specific taxes that are paid in a particular company. Finally we evaluate the effect of paying taxes, the overall economic situation of the company.
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Demonstration stand for industrial automation elements
Dobiáš, Pavel ; Vaněk, Jaromír (referee) ; Dohnal, Petr (advisor)
The first part is devoted to familiarization with intelligent motor protection. On the device, the universal motor controller UMC100-FBP from ABB Ltd., explains the features and capabilities of these devices. Because the work is focused on creating a utility that will be used to communicate with a remote laboratory stand, in the second part briefly describes some of the communication protocols and network. The next section describes the implementation of remote communication and creation utility. To verify the accuracy of the displayed data as to the actual UMC100-FBP and the utility was performing a simple measurement. The results are discussed in the penultimate chapter. In the last part of the thesis describes a program created by the operating instructions of the program.
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Motor controller UMC100 training device
Janáček, Martin ; Vaněk, Jaromír (referee) ; Dohnal, Petr (advisor)
Bachelor’s thesis conserning motor controller UMC100-FBP by ABB s.r.o. shows usage possibilities of this technology for 3-phase asynchronous motor. For demonstration was laboratory task designed and developed. It shows serious defective states of motor in practice. Construction plan and electrical diagram were made in AutoCAD and Inventor Professional.
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Determination Parameters of Synchronous Machines according to Measurement
Hrtáň, Michal ; Vaněk, Jaromír (referee) ; Hájek, Vítězslav (advisor)
This "Determination Parameters of Synchronous Machines according to Measurement" bachelor thesis describes methods of tests necessary to determine loss and efficiency of electrical machines with focus on synchronnous ones. It determines calculation procedures for evaluating the measurements. Furthermore, it deals with measuring mechanical vibrations and noise of an electrical machines. Definitions of given tests are written up with regards to contemporary norms. From above mentioned information comes a serviceable tool for automatic measurement protocol generation, which is an electronic form. The measured values are the input of the form. The output of the form is the measurement protocol with results of calculation and graphs of characteristics. For the thesis purposes, the form was filled in with acquired values from tests of a specific synchronnous machine. The related calculations for determining the machine parameters are stated.
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Line protection against overload and short circuit
Konšel, Ladislav ; Vaněk, Jaromír (referee) ; Valenta, Jiří (advisor)
This work includes a theoretical treatise on the operation of electrical wiring for the overload and short circuit. This is mainly on thermal effects of over current and their influence on the properties of conductors and insulation. Work Includes links to determine the load current, depending on the properties of leadership and its surroundings. It also deals with the protection of conductors against overload and short circuit. The work includes measurements process of warming wires. Practical project of proposal circuit is created using SICHR. The project includes proposals of conductor’s sizes and safety components for both residential building and individual flats.
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Protective measure - automatic disconnection of suply
Leitner, David ; Vaněk, Jaromír (referee) ; Valenta, Jiří (advisor)
The aim of this thesis is to explain the principle of automatic disconnection of supply, which is one of the basic protective measures for security assurance in electric installations of low voltage according to the new issue of Czech Technical Standard (ČSN 33 2000-4-41 ed. 2). Furthermore, the relevant clauses of the Czech Technical Standard in the new and previous issues are compared, with focus on the problem of automatic disconnection of supply in basic types of distribution networks. In agreement with theoretical conclusions, a project of electric energy supply system is proposed in the practical part of the thesis. Special attention is paid to showing the methods of modeling and verification of conditions for automatic disconnection of supply, with using control calculations in the SICHR program. Finally, the fulfillment of the conditions for automatic disconnection of supply is verified by revising the electrical supply system.
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