|
|
Switching of modern LED light sources
Dobrovolný, Jakub ; Fencl, Jiří (referee) ; Dostál, Lukáš (advisor)
The protection of the electrical device is provided to prevent the electric shocks, protect the equipment and prevent a damage caused by electrical faults. The current protection for a small fault currents need not always have an effect. At the serious faults the current protections never work. The new type of device to protect against damage caused by electrical failure is an arc protection. The arc protection switches off safely all types of fault arc in different sizes. This work verifies its correct functionality in the case of electric circuit with deceptive signals from LED light sources. The output of the work is the measurement of the switching current of the LED light sources. The work is remarkable thanks the number of measurement for individual angles of switching on which have statistical meaning.
|
|
|
Proposal of electrical equipment for soaking and drying cores for making castings
Čermák, Jiří ; Hájek, Vítězslav (referee) ; Veselka, František (advisor)
This diploma thesis deals with proposal of electrical equipment for soaking and drying cores for making castings at foundry in a Great Britain. It brings look at system of technical norms ČSN and it compares it with british system of technical norms British standards. The second part of this thesis contains detailed proposal of this equipment, including specification of control system, specification of power supply cables and control cables and particular technological units. The whole project documentation is enclosed as an inseparable attachment of this diploma thesis.
|
|
|
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.
|
|
| |
|
|
Technical and economic comparison of electrical system designs of the hotel complex
Šedivý, Tomáš ; Jurák, Viktor (referee) ; Ptáček, Michal (advisor)
The aim of the bachelor thesis is to implement the designs of electrical power supply of a selected hotel complex and related technical and non-technical comparison. The subject is specifically to compare the power supply solution options through a centralized power centre, separate transformer stations located within the complex, for example in terms of the evaluation of active power losses on the line, investment and operating costs or in terms of space requirements, etc.
|
|
| |
|
|
Comparison of design classic and smart wiring of house
Valo, Marek ; Novotný, Jan (referee) ; Bátora, Branislav (advisor)
This work contains requirements for the design of high-voltage and low-voltage classic and smart wiring. The aim of this work is to implement a project of classic and smart wiring for house and their subsequent comparison. In the beginning is introduction to wiring as such, insight into history, a brief presentation of contemporary species of wiring. The following chapter provides an analysis of high-voltage systems and criteria in its designing, which is based on the currently valid standards. The chapter contains also a brief excerpt dealing with ways of storing wires in buildings and installation zones individual rooms. Chapter of system wiring briefly describes the idea of this kind of wiring and its function. Introduction is focused on explanations of the system wiring, then the chapter directed to a specific producer used in the design of the project itself. In the chapter number five the problem of low voltage wiring and methods for their design are analysed. The following section deals with the design of wiring own project (classic and system) for a family house, designing switchboard, budgeting and technical reports. In conclusion, these two types of wiring are compared in terms of design, project documentation and budget. The practical part is dedicated to creating drawings containing high-voltage and low voltage wiring, switchboard scheme, budget, calculating illuminance and technical reports. The project documentation is discussed further in the technical report.
|
|
|
The small hydroelectric power station design
Kokeš, Petr ; Pěcha, Jiří (referee) ; Matoušek, Antonín (advisor)
The thesis deals with comprehensive design of the small hydroelectric power station in the particular site. There is the site description in the first part followed by evaluation of the hydroenergetic capacity of the watercourse and description of the inlet building and piping. Building and machinery part of the turbine hall is described in the next part. The electric part of the power station is worked up to wider scope and includes hydroalternator, switchgears incl. power for self-consumption, electric protections, cabling, transformer substation and high voltage inlet line. There is a description of the control system in the next part and economical evaluation of the investment is at the end.
|
|
|
A Low Voltage Wiring System for an Office Block
Nestrojil, Martin ; Slavata, Petr (referee) ; Kadlec, Radim (advisor)
This paper describes the design of a low voltage network in an office building. In the beginning work is given for the theoretical part of the topics that we need to create a network design in a given building. In this part of the guiding principles are conductor sizing, fuse wires and a selection of protective devices. Everything was sought in scientific publications and Articles. The theoretical part will be followed by a practical part with the first adjusted underlying schema, and then will address a practical design using programs supplied by the company Eaton. The goal of this work is to get acquainted theoretically with the main principles of network design, and then practically with your programs and create a complete network design of the building.
|
|
|
Type test of a switching device
Knebl, Ladislav ; Dostál, Lukáš (referee) ; Valenta, Jiří (advisor)
Protection of the electrical ciruits in electrical installations by circuit breakers is the most common way of protecting circuits from overcurrents. In the low voltage installations, fuses were replaced by the circuit breakers. For this reason, it is important to put great emphases on their quality and user safety . This thesis deals with principle of the circuit breaker, its function, construction requirements and requirements for the type test, which the manufacturer needs to pass before release the device on market. These requrements are listed in Czech Technical Standard ČSN EN 60898-1. In this thesis, specific type of circuit breaker will be also described. Some sequences of tests described in the standard will be performed on that breaker.
|
guest ::
