Nanoparticles as lubricant additives demonstrate powerful friction reduction and antiwear properties are potential alternatives to traditional in line with green environmentally friendly requirements. However, the vast majority of currently available research focuses on tribological various nanoparticles base oils at laboratory, which has a large gap their application engineering. To cope rapid...

In the existing microprocessor-based directional current protection lines from phase-to-phase short circuits, digital power direction elements are used, which, as a rule, switched on at full currents and voltage according to so-called 90-degree pattern. With this switching scheme, “dead” zone appears only in case of three-phase circuits close installation site, which make up small fraction all ...