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High-density 12kVA UPS from HP draws on smart output

Posted: 02 Jul 2002 ?? ?Print Version ?Bookmark and Share

Keywords:ups r12000 xr? uninterruptible power supply? ups? wireless paralleling architecture? r12000 xr?

Touting a new high in power capability and a proprietary "wireless paralleling" architecture to address fault-tolerance, Hewlett-Packard Co. is billing its UPS R12000 XR as the industry's most power-dense uninterruptible power supply (UPS) in a 10U enclosure. The unit was developed by Compaq Computer Corp. here, which was recently acquired by HP.

Specially designed to meet 24/7-like requirements, the R12000 XR, a single-phase, online (double-conversion) 240Vac unit pays particular attention to thermal management, which results in a compact (17.5-by-17.5-by-28.6 inches) supply that's unity-rated (i.e., 1VA/1W). Its paralleling technology, intended to eliminate system-level single points of failure, allows users to combine UPS units without intermodule communication wiring. The hot-swappable design also includes support for up to two extended run-time modules, which come in 4U-high enclosures.

The supply's basic modular design consists of four independent 3kVA units, each including an electronics/control logic module and a battery module. It can be configured as an N+x redundant system: Using a seven-language front-panel LCD, users can configure the system to one having a capacity of 3kVA with three backup units, or apply it as a straight 12kVA supply. In addition, the system employs lead-tin batteries, which the company says provide a shelf life that exceeds traditional lead-acid batteries by more than one-third.

The R12000 XR also supports up to two extended run-time modules (ERMs). These will provide up to 15min of extended battery backup time. In addition, the UPS' enhanced battery-management system will double battery service life, optimize battery recharge time and provide notice of pending battery failure, according to the company.

The system also comes with a power-distribution unit that has nine outlets and a current-handling capability of up to 40A; it can support two such PDUs.

The supply's DSP-based wireless technology uses a unique mathematical firmware approach to paralleling for redundancy, eliminating master/slave communications setups. All necessary information for paralleling is derived from the module's output power waveform, the company said, an approach that is said to allow all modules to function autonomously. If one of the modules fails, the remaining modules seamlessly redistribute the new load requirements through an automatic load-sharing process, according to HP.

The R12000 XR weighs 420 pounds. It carries an Internet price of $11,425. Pricing may vary by country or region. ERMs are sold separately.

EE Times

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