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Heat loss of tap-off units of a busbar trunking system
Koudelka, Jan ; Krbal, Michal (referee) ; Zezula, Michal (referee) ; Lázničková, Ilona (advisor)
The thesis deals with the issue of design of tap-off units of a busbar trunking system in point of view of a heat loss. At first the issue of busbar trunking systems as an alternitive to wires is presented in the thesis. Then there is a deep analysis of a design of a tap-off unit, including the issue of calculating the temperature-rise. For the design, a computer program was created, whose presentation makes up the cardial part of the thesis. Not only its parts are described, but also there is written how to work with it and which datas it uses. At last results of the design of the tap-off unit in the program are compared to the results of the type test of the temperature-rise.
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Influece of secondary apparatuses on assembly box heating
Dobiáš, Pavel ; Ovsík, Jiří (referee) ; Bušov, Bohuslav (advisor)
This master's thesis deals with the temperature-rise of selected parts of the low-voltage switchgear. The theoretical part describes the physical principles and the basic mechanisms of heat transfer. The next part describes the possible effect of elevated temperature on the device inside the switchgear. The master's thesis is awarded by ABB Ltd., so another part is dedicated to MNS switchgear. The following part describes the permitted limit of temperature-rise of switchgear in accordance with IEC 61439-1. In the practical part is a calculation temperature-rise of selected part of switchgear based on IEC 60890. Model in SOLIDWORKS Flow Simulation was created for the same part of the switchgear and thermal analysis was performed. The values of allowable temperature rise of individual parts are compared with the results obtained by calculations and simulations. In the last part is verified the possibility of calculating the temperature-rise in the EPLAN software.
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Heat loss of tap-off units of a busbar trunking system
Koudelka, Jan ; Krbal, Michal (referee) ; Zezula, Michal (referee) ; Lázničková, Ilona (advisor)
The thesis deals with the issue of design of tap-off units of a busbar trunking system in point of view of a heat loss. At first the issue of busbar trunking systems as an alternitive to wires is presented in the thesis. Then there is a deep analysis of a design of a tap-off unit, including the issue of calculating the temperature-rise. For the design, a computer program was created, whose presentation makes up the cardial part of the thesis. Not only its parts are described, but also there is written how to work with it and which datas it uses. At last results of the design of the tap-off unit in the program are compared to the results of the type test of the temperature-rise.
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Influece of secondary apparatuses on assembly box heating
Dobiáš, Pavel ; Ovsík, Jiří (referee) ; Bušov, Bohuslav (advisor)
This master's thesis deals with the temperature-rise of selected parts of the low-voltage switchgear. The theoretical part describes the physical principles and the basic mechanisms of heat transfer. The next part describes the possible effect of elevated temperature on the device inside the switchgear. The master's thesis is awarded by ABB Ltd., so another part is dedicated to MNS switchgear. The following part describes the permitted limit of temperature-rise of switchgear in accordance with IEC 61439-1. In the practical part is a calculation temperature-rise of selected part of switchgear based on IEC 60890. Model in SOLIDWORKS Flow Simulation was created for the same part of the switchgear and thermal analysis was performed. The values of allowable temperature rise of individual parts are compared with the results obtained by calculations and simulations. In the last part is verified the possibility of calculating the temperature-rise in the EPLAN software.
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