Dec 13, 2019   9:34 a.m. Lucia
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doc. Ing. Juraj Packa, PhD.
Identification number: 1923
University e-mail: juraj.packa [at]
Docent CSc.,PhD. - Institute of Power and Applied Electrical Engineering (FEEIT)
External colleague - Faculty of Electrical Engineering and Information Technology (STU)

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Basic information

Basic information about a final thesis

Type of thesis: Habilitation thesis
Thesis title:Degradation of insulation systems properties and possibilities of their diagnostics
Written by (author): doc. Ing. Juraj Packa, PhD.
Department: Department for science and research (Dek FEEIT)
Opponent 1:prof. Ing. Dušan Pudiš, PhD.
Opponent 2:prof. Ing. Alena Pietrikova, PhD.
Opponent 3:doc. Ing. Miroslav Mejzlík, CSc.
Final thesis progress:Final thesis was successfully defended.

Additional information

Additional information about the final thesis follows. Click on the language link to display the information in the desired language.

Language of final thesis:Slovak

Slovak        English

Title of the thesis:Degradation of insulation systems properties and possibilities of their diagnostics
Summary:Electrical insulating materials are an integral part of most of the available electrical and power equipments. Convenient properties provide not only functionality and no-failure operation, but also the safety of electrical equipment. The properties of electrical insulating materials are subjected to changes due to various factors and stresses. Diagnostics of these changes is a current topic of high importance because of the general trends to extend the lifetime of individual electrical equipment as well as large technological units. The habilitation thesis deals with the parts of the author´s work in the field of electrical insulating materials and their diagnostics at Institute of Power and Applied Electrical Engineering. The habilitation thesis is prepared by selecting published articles with appropriate reference to the issues and comments on those specific publications with regard to the diversity and in relatively comprehensive way. The most important part of the thesis is devoted to the degradation of cables with PVC insulation and application of conventional and unconventional diagnostic methods. Among others the influence of degradation factors (especially moisture and water) on non-halogen cables and cables designated for photovoltaic applications is also included. The application of the recovery voltage method is demonstrated on a ceramic insulator as a convenient diagnostic method. Previously, it had been successfully applied to cables with PVC insulation. The part of thesis is devoted to the encapsulating materials – electrical insulation materials used in photovoltaics for protection of photovoltaic cells and modules, too. The degradation of their properties during operation can significantly influence the economic effectiveness caused by reduction of the performance and shortening of theexpected lifetime.
Key words:accelerated ageing, degradation factors, electrical insulating systems, encapsulation, diagnostics

Parts of thesis with postponed release:

Final thesis (final thesis appendices) unlimited
Reviews for final thesis unlimited