Network Vault Design for High-Rise and Other Commercial Buildings

The electric demands generated by modem office/commercial buildings invariably require the installation of a multiple number of transformers in close proximity to the building. Many new buildings have power supplied at two locations, one beneath the side-walk and the other up in the building or perhaps on the roof. Any of these installations could provide up to 6000 kVA at 208 V or up to 15 000 kVA at 460 V, at one point of service. Design of major network installations breaks naturally into two parts. First it is necessary to establish the utilization voltage, number of transformers, and number of service points. Only then can we mate the company standards with the customer's building design. The challenge is derived in satisfying company requirements, customer requirements, and municipal regulations within a framework of economics. Underlying the design is also the ability to install, maintain, or replace any component of the supply system without interruption of service. This ability is really the backbone or definition of network design.