| 摘要 |
PURPOSE:To provide a high voltage distribution facility for building in which the voltage is stepped down at each floor which can be easily partitioned off a cable shaft while reducing the space required. CONSTITUTION:A through busing 21 is disposed through a fire retardant barrier 9 partitioning a cable shaft 8 and an electric room 11. Primary switch 22 for transformer is disposed on the cable shaft 8 side whereas a distribution board housing a distribution transformer 23 is disposed at the electric room 11 side and the transformer primary switch 22 is connected through the through-wall bushing 21 with the distribution transformer 23. Consequently, the cable shaft can be easily partitioned off the electric room by means of the fire retardant barrier and the cable shaft can be made compact regardless of the capacity of transformer or the number of branches, resulting in effective utilization of building space. |
