|
|
Electrical installation in family home
Pokorný, Marek ; Bátora, Branislav (referee) ; Macháček, Jan (advisor)
The goal of this bachelor paper with the topic " Electrical installation in family home" is to describe laws and public notices that relate to an electrical setting; relevant norms and conditions for a connection to a distribution network (low tension service lines); ways of connections and its location. Furthermore, this paper describes operational conditions, external effects, dimensioning, cabel lodgements and protection (its ways, principles, security and conductor). In a separate chapter low tensinon switch-boards distribution and its instrumentation is covered. Another sphere of this bachelor paper is the field of illumination and lamps. The following chapter deals with sorts of electrical setting (classic, intelligent), low-tension electrical setting (PC distributions), fire and safty electrical setting and audit report elaboration. A practical sample of a electrical installation in family home is shown at the end of this paper
|
|
|
Analysis of effects of short-circuit current in switchgear cabinet
Prokop, Jan ; Bušov, Bohuslav (referee) ; Valenta, Jiří (advisor)
The work is focusing on dynamic effects of short-circuit currents, more precisely dynamic effects of short-circuit currents on switchgear cabinet (terminal box). The work was designated to a concrete construction type of two switchgear cabinets located on rotating machines via company Siemens Electric Machines Drásov s.r.o.. The switchgear cabinets are designed for non-explosive environment where the air is used as an insulating medium. The task was to determine how the device will behave during the three-phase short-circuit and three-phase short-circuit with earth/ground connection. The following programs were used for the calculations and simulations: Ansoft Maxwell 16.0, Ansoft Maxwell 2015 and ANSYS Workbench 16.0. By using these programs the effects of forces which acts on current paths in cabinet caused by the passage of short-circuit current were simulated, statically and also dynamically. Further the effects of pressure acting on cabinet frame during the arc short-circuit have been statically and dynamically simulated. All the results are summarized in the conclusion. Conclusion also contains the final evaluation of the functionality of both switchgear cabinets.
|
|
|
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.
|
|
|
Dedicated machine for forming of jerrican spouts
Podolan, Luděk ; Ing.Pavel Cícha, Evropský polytechnický institut, Kunovice (referee) ; Novák, Vítězslav (advisor)
The aim of this diploma thesis is detail description of theory, design process and final realization of single-purpose machine for pressing canister funnels. Theoretical section of this work covers manufacturing standards of the electrical cabinets, options for the single-purpose machine control with focus on the programmable logic controller e.g. PLC, PLC control program concept with definition of the main alarm states and description of two types of electrical cabinet. Practical part contains description of the electrical cabinet, its block diagram, photo documentation of the wiring (chapter 4.), chosen PLC type, its advantages and detail program description using Ladder diagram notation, communication with operator realized with touch LCD panel, programming environment for this LCD panel and program realization process. Finalized machine description and its photo documentation in manufacturing process is covered in the end. This diploma thesis is based and extends previously successfully defended semester project.
|
|
|
Simulation of Heat Transfer in Low-Voltage Switchboard MNS - Optimization of Heat Transfer into The Switchboard
Czudek, Aleš ; Maxa, Jiří (referee) ; Vyroubal, Petr (advisor)
The thesis includes diagnostics temperature field of industrial low voltage. Place of origin, flow and heat transfer are important aspects in the design of the switchgear, especially in terms of proper equipment layout. The correctness of the design of the switchgear is verified by measuring the practical temperature field during testing or in work mode. To determine the temperature profile, it is necessary to measure the temperature at various points of the switchgear, either contact or contactless method. Measurements are performed on standardized low voltage switchboards, which are located power elements. The goal is to replace costly and time-consuming field testing switchgear efficient simulation of the temperature field mathematical model developed switchboards.
|
|
| |
|
|
Containerized Low-Voltage/ Middle-Voltage Substations
Marcol, Michal ; Loutocký, Evžen (referee) ; Drápela, Jiří (advisor)
As it is already apparent from a title of my work, I will be engaged in proposal of container VN/NN distributor using components from company ABB. This work will be after final making also used by company ABB to simplify procedure of proposal of any kind of container distributor. In my labor I will be generally deal with individual products, which will after that be used in distributor. Next I will be engaged in particular making of distributor, which should be made. The distributor will be designed for a separate part of the transformer and for a transformer as a unit, which is not separated from substation.
|
|
|
Design of 22 kV Cable Network in the Existing Complex of Faculty Hospital
Blažek, Tomáš ; Procházka, Aleš (referee) ; Orságová, Jaroslava (advisor)
This thesis describes the reconstruction network 10 kV HV networks in a teaching hospital in the transition to a new 22 kV voltage level according to valid regulations. The paper describes the current state of technological equipment and its gradual replacement with new technology at 22 kV voltage level in each power units so as not to limit the operation of the hospital. For this purpose, the new backup system for rotating spare resources. The thesis deals with new input distribution, which will serve as a transfer point between the customer and distributor of electricity as well as advance the existing technological equipment.
|
|
|
Project of Outgoing Transformer Unit for the Photovoltaic Power Station
Hanák, Miroslav ; Procházka, Aleš (referee) ; Orságová, Jaroslava (advisor)
This master’s thesis engages in project of outgoing transformer unit for the photovoltaic power station. It describes project and its design documentation what conducts to practising of construction. It has compared investing to more expansive transformer what has lower loss. It describes charges of operation’s transformer in twenty years. It leads project of cable low voltage. It compares whether is better to use aluminium or cupric cables. Project is led with respect for investment costs and minimum of operation loss.
|
|
|
Control systems of Kaplan Turbine
Pavelka, František ; Kárník, Jan (referee) ; Fic, Miloslav (advisor)
The main objective of this bachelor´s thesis is to list briefly the most common types of water turbines and explain the construction and especially regulation of Kaplan water turbine. Second task is to describe individually both regulatory mechanisms and movements in the machine during the regulation by distributor and by blades of runner wheel. The next intention is to describe the influence of regulation on the efficiency curve and further briefly explain and compare the modern control systems of turbine regulation with the old way using the centrifugal regulator.
|
guest ::
