Uninterruptible Power System works in parallel for redundancy.

Press Release Summary:

Powerware Hot Sync 9330 UPS can be configured in paralleled solutions for maximum system reliability and availability for applications in the 10 to 40 kV range. Digital signal processing provides true pulse width modulation. System's firmware-based paralleling technique uses mathematical instead of mechanical approach, which eliminates need for communication wiring and added circuitry between modules and eliminates single point-of-failure.

Original Press Release:


Paralleling for redundancy and capacity increases availability for applications in the 10-40 kVA range

RALEIGH, N.C. (November 12, 2001) - Invensys Powerware Division announced today that the latest uninterruptible power system (UPS) in its three-phase product family, the Powerware 9330, now can be configured for paralleled solutions using its patented Powerware Hot Sync technology. By utilizing Powerware Hot Sync, the Powerware 9330 provides maximum system reliability and availability for applications in the 10-40 kVA range, such as the new IBM pSeries servers.

Parallel redundancy with UPSs has been used for years as a way of delivering higher levels of reliability. If one UPS module must go offline for any reason, there is another UPS to assume the load. In parallel capacity systems, additional modules can be added to increase overall system capacity, allowing a seamless growth path as needs change. Powerware Hot Sync is a patented, firmware-based paralleling technique that has been installed with Powerware 9315 UPSs in mission-critical applications around the world. By using a mathematical, not mechanical, approach to paralleling, Powerware Hot Sync addresses the inherent drawbacks of traditional paralleling configurations as it eliminates the need for communication wiring and added circuitry between the modules. Powerware Hot Sync also employs unique load share and selective tripping methodology, providing a proven path to maximum reliability and system availability. By bringing this technology to the Powerware 9330, parallel redundant and parallel capacity solutions are now available in a smaller, three-phase UPS solution.

"Powerware Hot Sync has been established as the premier paralleling solution in the industry," said Darrick Finan, director of product management, Powerware. "By pairing this proven technique with the already high reliability of the Powerware 9330, our customers know they will have the highest system availability possible."

Powerware Hot Sync Benefits:
Unlike other paralleling techniques, there is no system-level single- point-of-failure. Capable of paralleling for both redundancy and capacity, Powerware Hot Sync provides a flexible approach to system solutions.

By using a peer configuration, as opposed to a"master-slave" configuration, Powerware Hot Sync ensures that each module is operating independently.

No added circuitry or components are required to be "switched in" to operate in the units in parallel. In addition to Powerware Hot Sync paralleling, the primary features and benefits of the Powerware 9330 include:

Double conversion online design - The Powerware 9330 is a true double conversion online design, adhering to IEC (International Electrotechnical Commission) standard 62040-3. Double conversion online is the proven technology that is used for the most mission-critical applications in the world. It's virtually impossible to find line- interactive, "pseudo-online" or any other kind of UPS other than double conversion online supporting 24/365 data centers, facilities, ISPs and major telecommunications installations.

High Efficiency - The Powerware 9330's advanced design features the highest level of efficiency of any double conversion online UPS in the 10-40kVA range with up to 93 percent efficiency. There is no need to compromise reliability for efficiency with the Powerware 9330.

Pulse Width Modulation - The Powerware 9330 delivers high performance with fewer components by using digital signal processing, which enables the Powerware 9330 to offer true pulse width modulation. This provides easy setup, drift-free operation and a more pristine output waveform.

Intelligent Communications - Using Invensys Powerware's extensive array of communication options, including PowerVision enterprise monitoring software and FORESEER foundation equipment monitoring software, the Powerware 9330 can be managed locally and remotely via direct communications and the network.

DC Expert Plus - built in battery monitor, featuring: Powerware Battery Lifetime Monitor uses measures of chronological time, number of battery discharges, battery temperature, and system loading to determine runtime remaining and battery lifetime remaining.

Battery Runtime Remaining Monitor uses system loading plus internal sensing points for voltage and current data to calculate runtime remaining.

Advanced Battery Management (ABM) uses patented three-stage charging technique that not only doubles battery service life, but also optimizes recharge time.

Battery Circuit Test (BCT) performs a periodic pulse test of the battery string to ensure there are no open circuits that would jeopardize battery performance and system availability.

Temperature Compensated Charging (TCC) monitors the battery temperature and through sophisticated algorithms adjusts the rate of charge, compensating for the ambient temperature to prolong the life of the battery.

Global Services - Invensys Powerware professionals provide around-the- clock monitoring, remote diagnostics, and on-site maintenance programs. More than just a warranty, this is the most comprehensive service coverage available in the industry. Powerware Global Service provides customers with peace-of-mind that potential downtime is prevented by taking steps ahead of time. Powerware Hot Sync will be available for the Powerware 9330 in January 2002.

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