16 MW Data Center
Client: Confidential Client
Project description
This self-contained data center includes an electrical distribution system feeding eight 2 MW lines to provide the required electrical capacity for the facilities. The site is supplied by two separate 25 kV underground power inlets.
Each 2 MW line (including back-up lines) includes a 2.8 MVA 25 kV-480 V step-down transformer, a 4000 A-480 V main switchgear and a 2.5 MW/3.125 MVA diesel genset, a 20 kW UPS control system, three distribution panels for mechanical services and several distribution centers for powering computer equipment (PDU). All mechanical service distribution panels and PDUs can also be powered by either of the two emergency lines. Inverters are installed in server racks to provide continuous power to their respective loads.
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Characteristics and Impacts
MV distribution is designed as a loop system. The open loop design of the primary selection is a set of open loops fed by two feeder circuit breakers. Each loop consists of four or five MV transformers, each with two vacuum fault interrupters (VFI). A locking system is in place to ensure that there is always at least one VFI or circuit breaker in the open position.
This design offers many advantages, including control of energy flow to each electrical input, maintenance on any component without affecting the rest of the electrical distribution, and cost reduction.
