High voltage DC power distribution for telecommunications facilities

Abstract

Telecom New Zealand was faced with supplying increased DC power capacity to the ldquoNetwork Equipmentrdquo floors in multi-storied buildings. Many of these buildings have floor weight restrictions that make it costly to install high Amp Hour capacity batteries on them. There was also the high cost of bus bar distribution from 50 Volt DC systems on lower floors. Additionally the installation of NGN equipment often demanded the retrofitting of new 50 Volt DC ldquoBrdquo feeds into existing buildings where there is limited space in the electrical risers to accommodate new 50 volt DC bus bars.