Miroslav Ljevak

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The aim of the study was to evaluate long-term clinical and immunological effects of anti-B cell treatment in patients with antineutrophil cytoplasmic antibodies (ANCA)-associated vasculitis refractory to conventional immunosuppressive treatment. Rituximab (RTX) was added to the ongoing immunosuppressive treatment in 29 patients with refractory(More)
Very fast electromagnetic transients (VFT) in air insulated substations (AIS) and gas insulated substations (GIS) caused by switching operation of disconnectors are investigated. Results obtained from very extensive field tests and from digital simulations as well as a comparison between field tests and calculation results of VFT in AIS and GIS due to(More)
In this paper, switching overvoltages due to disconnector switching in air-insulated substations (AISs) are presented. Measurements of these switching overvoltages were performed in the AIS Grabovica (Hydro Power Plant-HPP Grabovica) on River Neretva and the AIS Kakanj (Thermo Power Plant-TPP Kakanj). These power plants are important objects for operation(More)
In the paper are presented results of switching overvoltages investigations, produced by operations of air disconnector rated voltage 220 kV. Measurements of these switching overvoltages are performed in the air-insulated substation HPP Grabovica on River Neretva, which is an important object for operation of electric power system of Bosnia and Herzegovina.(More)
This paper presents considerations on the synergistic effects in gas mixtures; the SF6-N2 and SF6-Ar, in respect to relevant characteristics of gas insulation. In the experiments we tested following gas properties: dielectric strength, voltage breakdown rate of rise, surface breakdown per insulator within a gas atmosphere. In the experiments we applied: DC(More)
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