Realizace měřicího přípravku pro transformátor nn

Abstract

This bachelor thesis is dealing with creating of laboratory task for students of Electrical Machines I. In a theoretical part there are explained basic informations of transformers in general, and later the theory moves to basic options of protecting low-voltage transformers. At the end there are summarized options for switching low-voltage transformers. Next part of bachelor thesis is dedicated to creation of measurement assembly where I choose appropriate components for a measurement assembly and creation of itself. In the third part of this thesis the measurement is done on the measurement assembly where the first measurement was done in transformer being short-circuited and open-circuited so we could find out its parameters. After that measurement of transients during switching the transformer on in short-circuit and open-circuit was done where we looked at dynamic inrush current. Forth part is dedicated to creation of laboratory task for students of stated class to understand given problems in the easiest circuit possible. At the end there are summary of the results where I descrive succes of creation of measurement assembly and its testing during my own measuring int the lab.