Development of power distribution cabinet for higher-voltage direct-current power feeding system

Reducing the feeding loss of information and communications technology equipment, such as servers and routers, is very effective for reducing the total power consumption in data centers and telecommunication buildings. In this paper, the structure and function of a higher-voltage direct-current (HVDC) power feeding system prototype is presented. This system was developed to reduce power delivery and conversion losses by using 380 V DC. For operational safety, a floating ground system with an earth detector is applied and a fuse and circuit breaker in the power distribution cabinet work in cooperation. The system voltage is around 380 V, and the output power of the rectifier is 100 kW. We describe the advantages of an HVDC power feeding system and show that its basic characteristics are stable.