The continuity of electrical energy is the main subject among all others affecting operational sustainability in industrial facilities. Therefore electrical system and its extensions shall be controlled, supervised, monitored and protected by intelligent systems. Hence, it is necessary to incorporate into electrical system required resources and hardware that will enhance the safety and sustainability of electrical energy by means of utilizing all available economical and technical means. In this regard; industrial facilities, along getting fed by national grid, install stand-alone production units too. However, electricity systems involving multiple energy production resources need to be run and controlled by smart systems that do not require technical manpower interference in order to comply with economical constraints, governing laws, regulations, etc. and be able to take prompt and correct decisions. Therefore, electricity systems should be enhanced with necessary prompt intelligent decision-maker and performer subsystems, which will continuously monitor, supervise, control and record electrical system and extensions and ensure system sustainability in case of occurrence significant change in the whole system. This article aims to illustrate all required smart systems that ensure sustainability and safety of electrical energy, complying with governing laws and regulations and an application regarding supporting systems in an industrial facility.