Clean mains power and uptime are basic conditions for the success of any data center. But the rapid growth of data centers and therefore their increasing power consumption places increasing emphasis on efficiency. Due to the high power consumption, any efficiency improvement quickly leads to significant cost savings. This high efficiency becomes all the more important due to the rise of edge computing and the great interest in the Internet of Things, which puts more pressure on data centers. ABB now offers a solution that guarantees the best in terms of both efficiency and availability: the new UPS (Uninterruptible Power Supply) DPA 250 S4. With an efficiency of 97.6 percent, it offers no less than 30 percent less power loss, very high reliability, no failures and a low cost of ownership.
Modular redundant architecture
The DPA 250 S4 is built around ABB's decentralized parallel architecture (DPA™) and covers a power range from 50 to 1,500 kW. The UPS has been specially developed for critical environments with high computer density such as small to medium data centers, utilities, healthcare facilities, railway signaling applications and airports.
In addition, the UPS can be easily and quickly expanded and maintained thanks to its modular architecture. Modules can be added or removed while under tension. Each DPA 250 S4 UPS module is equipped with all functional components to function independently. As a result, the various modules offer redundancy at every functional level. If one of the modules fails, other modules in the system take over the power supply for the load. System reliability and availability are therefore high compared to other modular UPS solutions.
The characteristic decentralized parallel architecture of the DPA 250 S4 offers many advantages. A module can be added or replaced in less than 10 minutes, resulting in a much lower MTTR (mean time to repair). One DPA 250 S4 250 kW cabinet offers space for up to six 50 kW modules for 250 kW N+1 redundant power. Up to six 250 kW cabinets (max. 30 modules) can then be connected in parallel for 1,500 kW of clean, uninterrupted power. Thanks to the safe ring bus communication, malfunctions in the system are prevented.
'Lean power' for maximum efficiency
Also notable are the 'dual conversion mode' and ABB's Xtra VFI mode. The dual conversion mode guarantees absolutely interference-free and fluctuation-free performance for critical applications. The transformerless IGBT (Insulated Gate Bipolar Transistor) converters with three-layer topology ensure lighter weight, lower cooling requirements and energy-efficient operation. ABB's Xtra VFI mode also makes the UPS very efficient at low loads. In that case, the switch is made to 'lean power' and the number of modules used is optimized for the load. When multiple loads are switched on, multiple modules are automatically switched on in online mode. In Xtra VFI mode, the number of active modules alternates so that the modules age as smoothly as possible.
Because DPA modules are easy to add when power needs increase, oversizing the configuration is not necessary. The initial investment therefore remains limited. Front and top or bottom cable entry supports a variety of installation schemes. ABB's new system also offers various options for backup power and space for lithium-ion batteries.
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