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With today's cost of energy, just paying the electric bill for an average home can cause sticker shock. Imagine, then, how the operators of the San Diego Convention Center (SDCC)--a seven-city-block long, 2.6 million square-foot ([ft.sup.2]) state-of-the art complex--must feel. The perennially high cost of California energy is only one of the factors that drove the need to lower operational costs in this sprawling conglomeration of public exhibit halls, conference rooms, offices, underground parking areas, and more. The recently completed $216-million expansion project has also added significantly to the convention center's electrical load.
The San Diego Convention Center Corporation decided to follow up on information gathered by Operations/Electrical Manager Ron Barham at an Association of Energy Engineers energy conference. As a result, Barham contacted E-MON L.P. of Langhorne, PA, a manufacturer of electric submetering and automatic meter reading (AMR) hardware and software.
Realizing that he couldn't save what he didn't measure, Barham's investigation led the convention center to select a submetering system that would allow facility engineers to monitor, record, and report energy usage as a tool for conserving energy and for lowering overall operating costs.
"We chose the system based on price, customer service, and flexibility in allowing future expansion," said Barham. "It was also mandatory that we have a hybrid system, and the vendor's OEM arrangement with a power quality meter company gave us the total solution we needed to not only record power consumption and demand, but to monitor power factor, total harmonic distortion, and other power quality parameters."
The facility's main electrical service entrances are located in two large sub-level electrical vaults, where multiple (480 volt) 1600 and 3200-amp loads ...