ELPATOR is a company dealing in the construction, reconstruction and renovation of power facilities. Employees have over 20 years of experience working on high-voltage lines and stations in Poland and abroad. The main contractors are PGE Dystrybucja S.A. and PSE Polskie Sieci Elektroenergetyczne S.A. ELPATOR is one of the first users of the ZikOS computing platform. Originally, this tool was used in the area of short-circuit calculations and electric shock protection of overhead lines. Currently, the scope of use of the tool has also been expanded to include calculations of line cable mechanics and line profiles.