Explanipedia

Partial discharge behavior and insulation failures detection in electrical devices subjected to impulse voltage excitation Open

Manuel Eckert, Petr Mráz, Christof Ballweg, Josef Pihera · 2025

Antibacterial Activity and Chemical Composition of Popular Plant Essential Oils and Their Positive Interactions in Combination Open

Petr Mráz, Marek Kopecký, Lucie Hasoňová, Irena Hoštičková, Alena Vaníčková , et al. · 2025

Bacterial diseases are a global problem that threatens human health and cause many deaths each year. The alarming rise in bacterial resistance to modern antimicrobials is particularly concerning. In practice, this necessitates increasing t…

Extracts of Talaromyces purpureogenus Strains from Apis mellifera Bee Bread Inhibit the Growth of Paenibacillus spp. In Vitro Open

Kateřina Vočadlová, Tim Lüddecke, Maria A. Patras, Michael Marner, Christoph Hartwig , et al. · 2023

Honey bees coexist with fungi that colonize hive surfaces and pollen. Some of these fungi are opportunistic pathogens, but many are beneficial species that produce antimicrobial compounds for pollen conservation and the regulation of patho…

Study of DC partial discharge on dielectric surfaces: Mechanism, patterns and similarities to AC Open

Saliha Abdul Madhar, Armando Rodrigo Mor, Petr Mráz, R. Ross · 2020

This paper presents the investigation on surface discharge behavior of various dielectric samples under DC. It sequentially develops the knowledge base for the study and analysis of the partial discharge (PD) defect with the goal of PD def…

Empirical analysis of partial discharge data and innovative visualization tools for defect identification under DC stress Open

Saliha Abdul Madhar, Petr Mráz, Armando Rodrigo Mor, R. Ross · 2020

Study of Corona Configurations under DC Conditions and Recommendations for an Identification Test Plan Open

Saliha Abdul Madhar, Petr Mráz, Armando Rodrigo Mor, R. Ross · 2020

Corona is one of the most common forms of partial discharge (PD) occurring in high voltage (HV) energy systems. The corona mechanism in air is not exclusive to the field of energy applications but has also been widely studied by physicists…

Physical interpretation of the floating electrode defect patterns under AC and DC stress conditions Open

Saliha Abdul Madhar, Petr Mráz, Armando Rodrigo Mor, R. Ross · 2019

Partial discharge is a prevalent phenomenon under high voltage (HV) where the discharge partially bridges the gap between two electrodes. At increasing voltage levels, physical dimensions and distances between the electrical parts become c…

Frequency Response of a Real Cable Network and its Impact on Field PD Measurements Open

Saliha Abdul Madhar, Petr Mráz, Sonia Raquel Barrios Pereira, N. Akroud · 2019

Asset condition monitoring through Partial Discharge (PD) measurements is widely used for preemptive maintenance especially when it comes to cable networks. This is because the physical structure of the cable is a coaxial waveguide that po…

Guidelines for PD measurement according to IEC 60270 Open

Petr Mráz, Saliha Abdul Madhar, Patrick Treyer, Urs Hammer · 2019

Partial discharge measurements performed according to IEC 60270 has become an essential tool for the quality assurance of HV equipment. The main goal of IEC 60270 is to standardize and unify PD measurements to get comparable results for te…

Construction of low-pass HV filter for measuring of partial discharge Open

Bohumil Skala, V. Kůs, Vladimír Kindl, Petr Mráz · 2015

The paper discusses methodology for construction of low-pass high voltage (HV) filter for measuring of partial discharge deteriorating the insulating system of electric machinery. It focuses mainly on the shape optimization using analytica…

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