Development of solid state arc-free socket for DC distribution system

DC distribution systems have become more appealing in recent years due to its higher energy efficiency. They have already been applied in data centers, commercial buildings, electrical vehicles charger stations and DC micro grid systems, etc. However, electrical arcing is a common phenomenon in DC applications. Arcing and the related potential for fire and electric shock is the main safety problem in DC applications. In this paper, a totally arc-free socket is proposed and developed by embedding a solid state device. It is designed to handle various load conditions. In addition, over temperature and over current protection features have been embedded for realizing trip functions for each single outlet. Simulation and experimental results based on 380V DC, which is a common medium voltage applied in data centers and DC micro grids, has been discussed.