Jolanta Sadura
supervisor: Jan Sroka
Very often when the project of the laboratory is under developing, engineers don't know what kind of problems they meet during their work.
The topic of this research is concentrated on the high current laboratory where type tests like the short circuit tests of MV apparatus for example: switchgear, transformer stations, earthing, connectors, etc. are performed. It is a place where the test instruments responsible for controlling the test process faces electromagnetic fields which are influencing their electronic. It is demanded that the apparatus controlling the tests will work correctly without malfunctioning. Uncontrolled test when the apparatus is working without supervision of the operator is undesired and can be destructive for the device under test. The commercial solution can't be applied in case of the high current laboratory because the laboratory environment differs from the ordinary one and therefore some aspects of it are out of normative documents.
The steps of performed research were devoted to an analysis of electric and magnetic fields and identifying the existing electromagnetic disturbances. With measuring of electric and magnetic fields the problem was recognized as repetitive damped oscillatory waves DOW which are component of electromagnetic environment. They appear due to switching process of circuit breaker (closing of CB and powering the MV side of test transformers). The identification of existing disturbances and their sources was necessary to cre