Safety switch for photovoltaic system

Pri izgradnji fotonapetostnih sistemov je potrebno zadostiti ustreznim varnostnim zahtevam za njihovo varno obratovanje in vzdrževanje. Zaradi vplivov okolja so komponente fotonapetostnih sistemov izpostavljene številnim mehanskim poškodbam na strani enosmernega kot izmeničnega tokokroga. V teh primerih je hiter in varen izklop fotonapetostnega sistema ključen. V diplomski nalogi je podan pregled obstoječih rešitev stikal. Uvodoma so opisane komponente enosmernega tokokroga ter nevarnosti pri obratovanju fotonapetostnega sistema. Osrednji del je osredotočen na opis obloka, njegove detekcije in načinov njihovega gašenja.When building photovoltaic systems it is necessary to meet adequate security demands to ensure their safe operation and maintenance. Due to environmental influences the components of photovoltaic systems are exposed to numerous damages on the side of a direct as well as alternating circuit. In such cases a fast and safe disconnection of the photovoltaic system is crucial. In the thesis I present an overview of the existing solutions of the switches. In the introduction I describe the components of the direct circuit and the dangers that can occur when the photovoltaic system is in operation. The main part of the thesis is focused on the description of the arc, its detection and the methods of its extinction