|
|
House wiring
Tománek, Drahomír ; Dohnal, Petr (referee) ; Valenta, Jiří (advisor)
The aim of this work is to gather requirements for wiring in a family house and then a real project for a family home. The theoretical part is divided into four parts. The first section lists the most important wiring standards. The second part deals with the different parts of the wiring by connecting electricity to the lighting and socket circuits. The third part concentrates on the protection against electric shock and on the overload protection. The fourth part focuses on the individual requirements of each room. The practical part consists of drawings, technical reports, A price quotation and control requirements regarding the corresponding technical norms. The designs include site plan of the appliances, wiring and installation of the switchboards.
|
|
|
Apparatus for parameter identification instrument voltage transformer
Tománek, Drahomír ; Valenta, Jiří (referee) ; Dohnal, Petr (advisor)
This master thesis describes the design and production of devices for identifying the parameters of the instrument transformer. Work is divided into seven chapters. The first part focuses on the production of instrument voltage transformer. The next section describes the measurement and description of the parameters of instrument voltage transformer and design of printed circuit boards. Another section is devoted to a program for measuring card. The final part is manufactured and tested unit conducted the first test measurements.
|
|
|
CVVOZE Short circuit lab description
Brdečko, Aleš ; Valenta, Jiří (referee) ; Dohnal, Petr (advisor)
This diploma thesis deals with the analysis and description of high power laboratory CVVOZE. In the text we can find a description of the individual elements high power laboratory stating their parameters and their analysis from the perspective of impedance. The practical concern of this work is the creation of program for calculating the adjustment burdens and creating utilities helpful for operation and interpretation of laboratory function laity and technical employees.
|
|
|
Tesla coil proposition for HV spark gap source
Siuda, Petr ; Krbal, Michal (referee) ; Dohnal, Petr (advisor)
Tato bakalářská práce se zabývá základním seznámením s Nikolou Teslou a s jeho vynálezem Teslova transformátoru a jeho využití v elektrochemické praxi. Práce je rozdělená do čtyř částí. V úvodní části je stručně shrnut život elektrotechnika Nikoly Tesly a rozebrána problematika Teslova transformátoru. Druhá část je zaměřena na možné druhy a buzení Teslova transformátoru, výběr nejvhodnější varianty pro návrh základních komponent polovodičově buzeného teslova transformátoru pro VN jiskrový zdroj. Ve třetí části je popsán návrh budícího obvodu a desky plošných spojů. Dále je zde popsána výroba jednotlivých komponent a jejich základní technická dokumentace. V poslední, čtvrté části je popsáno oživení, měření a odzkoušení funkčního vzorku.
|
|
|
Calculation of heat and force field UniGear ZS1
Mokrý, Lukáš ; ABB, Drahomír Tůma, (referee) ; Dohnal, Petr (advisor)
The aim of my work is to describe high-voltage switchgear type UniGear 500R, which is part of UniGear switchgears family. I will focus on heating issue of one 500R unit and its parts during operation. Maximum values of this heating is limited by standards and can´t be exceed to ensure safe and reliable operation. That is why the heating tests are necessary part of designing and developing switchgears. Calculation will be made by two different ways. First is classic one-pole heating net method and second is numerical simulation in Solidworks flow simulation program. Except the theoretical description there will be presented also used 3D model and explanation of both method, used to calculation and simulation. Last point of this work is measuring of this type of switchgear and getting real data. The main point there is to compare measured values with values calculated and decide if is possible to simulate tests with appropriate accuracy. Then would be also possible to substitute the real test in laboratory, which costs many thousand crowns and takes lots hours of time. This work is collaborated with EJF division of ABB Company, where I am employed. Heating issues in this company is always on process, because of developing and improving of their products. So this work could be helpful in this field. ABB provides all materials needed, especially technical catalogues, 3D model and final values from laboratory measuring. Support from college faculty is mainly in study consultations and proposing of calculations making. In the end of work will be make final comparison and evaluation of achieved results.
|
|
|
EMC Test laboratory for low voltage circuit breaker
Vejtasa, Leoš ; Dřínovský, Jiří (referee) ; Dohnal, Petr (advisor)
Nowadays there are electronic systems almost in every new device. They are emitting and receiving electromagnetic interferences. The safety levels for circuit breakers are also increasing. Because of these issues the circuit breakers must work properly also in areas filled by electromagnetic interference. This thesis describes the issues of electromagnetic susceptibility of the circuit breakers.
|
|
|
Failure analysis of oil transformers
Knebl, Jan ; Distribuce, Ivan Mikulášek, ČEZ (referee) ; Dohnal, Petr (advisor)
The present thesis deals with power transformers, oil and dry, their properties and structures, and subsequently faults that occur in oil transformers. First, the disorders discussed in general and then a comparison of individual samples transformer failures that have occurred in recent years in the Moravian-Silesian and Olomouc regions. Finally, I analyze the failures and the most common encountered, I suggested solutions to reduce their incidence.
|
|
|
SHORTING DEVICE DRIVE OPTIMALIZATION
Michalík, Marek ; ABB, Drahomír Tůma, (referee) ; Dohnal, Petr (advisor)
Tato bakalářská práce se zabývá optimalizací pohonu zkratovače ve vysokonapěťovém rozváděči ve spolupráci s firmou ABB s.r.o, pro kterou je tato práce zpracovávána. V první části se zabývá teoretickým rozborem spínacích přístrojů se zaměřením na bezobloukové spínací přístroje, kam patří i zmiňovaný zkratovač. V dalším textu jsou aktuální informace o teorii elektrických pohonů, které jsou později využité v praktické části. Podrobněji se práce zabývá teorií stejnosměrných strojů zejména motorů s permanentními magnety, jelikož tento druh motoru je použit i v pohonu, který pohání použitý zkratovač. V další části je rozebrán celý pohon a všechny jeho části, několik odstravců je věnováno i výběru druhu optimalizace a zhodnocení současného stavu pohonu se zaměřením na jeho chyby a nedostatky. Jsou popsány parametry současného motoru a převodovek. V praktické části se dá nalézt protokol o zkoušce zkratovače, která proběhla v ABB s.r.o. V poslední části je k dispozici protokol z měření současného stavu nezatíženého pohonu. Jsou podrobně rozebrány a porovnány možnosti optimalizace pohonu. Všechna nabízená řešení byla důkladně konzultována se zástupci a techniky z průmyslových firem.
|
|
|
Reducing transformer inrush
Zoufalý, Marek ; Bušov, Bohuslav (referee) ; Dohnal, Petr (advisor)
In this thesis is described the function and design of the transformer designed on ferromagnetic core, composed of transformer sheets. It is explained a transient inrush current of the transformer. In this work is inserted voltage and current waveforms, designed printed circuit board, serving to reduce the inrush current.
|
|
|
Fast Transient Phenomena in High Voltage
Vala, Martin ; Dohnal, Petr (referee) ; Krbal, Michal (advisor)
This work deals with research and description of the fast transients in high voltage technics. First part deals with division of fast transients and description of an impulse wave properties. Second part is focused on atmospheric overvoltage description and on direct and indirect lightning surge protection methods. Next, there are described the main characteristics and division of the surge protection devices in the work. In the next part, there are introduced some sort of high voltage generators, used for meassurement of impulse wave in a transmission line. In the last part there is stated an analysis of practical measurement of impulse weaves and surge arresters by using a Marx generator.
|
guest ::
RSS feed.