In a recently published Whitepaper Emerson Network Power collected seven seven best practices for increasing efficiency, availability and capacity in the data center. The paper can be downloaded via Emersons Website.
Among them are very good recommendations, especially those concerning the selection and design of UPS. Here are the main findings.
1. Select a power system to optimize your availability and efficiency needs
“There is growing interest in using transformer-free UPS modules in three-phase critical power applications. Large transformer-free UPS systems are typically constructed of smaller, modular building blocks that deliver high power in a lighter weight with a smaller footprint and higher full load efficiency. In addition, some transformer-free UPS modules offer new scalability options that allow UPS modules and UPS systems to be paralleled to enable the power system to grow in a more flexible manner with simple paralleling methods, or internally scalable or modular designs.”
2. Design for flexibility using scalable architectures that minimizes footprint
“One of the most important challenges that must be addressed in any data center design project is configuring systems to meet current requirements, while ensuring the ability to adapt to future demands. In the past, this was accomplished by oversizing infrastructure systems and letting the data center grow into its infrastructure over time. That no longer works because it is inefficient in terms of both capital and energy costs. […] Some UPS systems now enable modularity within the UPS module itself (vertical) and across modules (horizontal) and across systems (orthogonal). Building on these highly scalable designs allows a system to scale from individual 200-1200 kW modules to a multi-module system capable of supporting up to 5 MW.”
But always keep in mind: These are only general recommendations. Selecting the best UPS topology for your data center is dependent on many factors, among them power quality, location, voltage, efficiency needs, availability demands, as well as other factors. Before deciding to buy, getting expert advice about the right choice of UPS product is the most important investment you can make.