The expansion of electric vehicles made the expansion of charging infrastructure rudimentary to keep up with this developing technology that helps people in a myriad of ways. The main drawback in electric vehicle charging, however, is the time consumed to charge a vehicle. The fast charging of electric vehicles solves this problem thus making it a lucrative technology for consumers. However, the fast charging technology is not without its limitations. In this paper we have identified the technology gaps in EV fast charging stations mostly focused on the extremely fast charging topology. It will help pave a path for researchers to direct their effort in a consolidated manner to contribute to the fast charging infrastructure. A thorough review of all aspects and limitations of existing extremely fast charging (XFC) stations have been identified and supporting data are provided. The importance of DC power network based on free fuel energy sources and silicon carbide-based power electronics are proposed to provide ultra-low cost and ultra-high speed XFC stations.

As an internal arc fault cannot be ruled out completely, manufacturers are designing equipments to withstand internal arc faults. The standards for the requirements differ considerably for example the requirements of ANSI are not the same as for IEC. But the standards are continuing to evolve as this issue becomes more understood.The design of a new range of withdrawable metal-clad cubicle shall provide the maximum safety to operating personnel and cope up with different demands. These cubicles shall be built with segregated compartments, doors and front covers designed to withstand severe stresses without allowing the effects of the arc to come outside. The paper describes the development with respect to internal arc, both from an operational and and an operator safety point of view.

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