National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Development of methodology and supporting tool for evaluation of measured values of high voltage poles grounding systems according standard PNE 33 3300-1
Kováč, Frederik ; Basík, Josef (referee) ; Toman, Petr (advisor)
Diploma thesis is oriented on measuring and evaluation of grounding conditions of HV pylons. In theoretical part is described theory of grounding including related legislation, impact of electric current on human body, methods of measuring earth resistance, soil resitivity and description of available measurers. Practical part is focused on measuring earth resistance of selected pylons and measuring procedures followed by evaluation of measurements according to person's safety from dangerous touch voltage and impact of lightings. For evauluation of measured data is created supporting tool in MS Excel. In the last part of thesis are described recommendations for cutting-down touch voltages.
Measurement of three-wire transformer parameters
Kováč, Frederik ; Bukvišová, Zuzana (referee) ; Wasserbauer, Vojtěch (advisor)
Thebachelor’sthesisdealswithmeasuringsymmetriccomponentalimpedanciesofthree winding transformer. Thesis is divided into a theoretical and practical part. In theoretical part is described principle of transformer operation, its parameters, open-circuited and short-circuited measuring, measuring of zero-sequence impedance and connection schemes. Practical part deals with design of workplace in laboratory, description of used instruments and practical measurements with real connection schemes. For measuring parameters of three winding transformer is created a laboratory instruction manual.

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2 Kováč, Filip
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