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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.
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Dimensioning of current-currying way of electrical apparatuses
Šic, Pavel ; Dostál, Lukáš (referee) ; Bušov, Bohuslav (advisor)
Bachelor‘s thesis is focuses on the issue of designing electrical switching devices, especially dimensioning of the current-carrying paths according to the effects of electrodynamic forces. There are dimensioning requirements for current carrying paths of switching devices in the introductory chapter. Fundamental requirements are: sufficient dielectric strength between parts at different potential, resistance to thermal effects of electric current and current path arrangement considering electrodynamic forces. Typical current path arrangements of electrical apparatuses are justified in second chapter. Furthermore, the actual problems to solve are formulated, corresponding with the development of technical solutions. Emphasis is laid upon proper description of modifications of the proposal so to limit their negative impact of secondary phenomena such as electrodynamic forces or thermal effects. The best solutions then directly positively use these phenomena. The present progressive technical solutions retrieved in a patented state of the art using Goldfire Innovator software are described in the third chapter. The work is then focused on rotary contact arrangement patents from the very first, through the pioneering patent to the present. Hereinafter are described the features of the evolution of technology development – micro and macrosegmentation. In the last chapter, there are analytically calculated electrodynamic forces acting on the contact arm of low voltage circuit breaker in both open and closed state and medium voltage disconnector. Both technical solutions are evaluated due to given requirements.
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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.
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|
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Dimensioning of current-currying way of electrical apparatuses
Šic, Pavel ; Dostál, Lukáš (referee) ; Bušov, Bohuslav (advisor)
Bachelor‘s thesis is focuses on the issue of designing electrical switching devices, especially dimensioning of the current-carrying paths according to the effects of electrodynamic forces. There are dimensioning requirements for current carrying paths of switching devices in the introductory chapter. Fundamental requirements are: sufficient dielectric strength between parts at different potential, resistance to thermal effects of electric current and current path arrangement considering electrodynamic forces. Typical current path arrangements of electrical apparatuses are justified in second chapter. Furthermore, the actual problems to solve are formulated, corresponding with the development of technical solutions. Emphasis is laid upon proper description of modifications of the proposal so to limit their negative impact of secondary phenomena such as electrodynamic forces or thermal effects. The best solutions then directly positively use these phenomena. The present progressive technical solutions retrieved in a patented state of the art using Goldfire Innovator software are described in the third chapter. The work is then focused on rotary contact arrangement patents from the very first, through the pioneering patent to the present. Hereinafter are described the features of the evolution of technology development – micro and macrosegmentation. In the last chapter, there are analytically calculated electrodynamic forces acting on the contact arm of low voltage circuit breaker in both open and closed state and medium voltage disconnector. Both technical solutions are evaluated due to given requirements.
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