Wireless UPS Paralleling

Powerware, Raleigh, N.C., offers Powerware Hot Sync, a patented paralleling technology that is said to eliminate system-level single-point-of-failure, enabling UPS modules to work in parallel and complete synchronization, for both redundant and capacity systems. The system features two identical modules arranged in a parallel redundant configuration and a parallel tie cabinet connecting the mod...

06/01/2002


Powerware , Raleigh, N.C., offers Powerware Hot Sync, a patented paralleling technology that is said to eliminate system-level single-point-of-failure, enabling UPS modules to work in parallel and complete synchronization, for both redundant and capacity systems. The system features two identical modules arranged in a parallel redundant configuration and a parallel tie cabinet connecting the modules to the critical bus. A common bypass input source allows the modules to synchronize their outputs, even when one or both of the parallel cabinet MOBs are open for maintenance.

The significance of this technology is that it overcomes the primary conundrum that has faced power technology engineers: how to parallel UPS modules to provide N+1, N+2 or higher redundancy without introducing a single-point-of-failure. By eliminating the communication wires between the UPS modules, and employing an algorithm by which each UPS constantly checks its own output for any variation on the critical bus, each UPS operates independently, but in complete synchronization with the other UPS in the system. The result of this operation is that the UPS modules automatically share the critical load, and can selectively trip and remove themselves from the critical bus if inverter failure or some other critical event occurs.

From Pure Power, Summer 2002.





No comments
Consulting-Specifying Engineer's Product of the Year (POY) contest is the premier award for new products in the HVAC, fire, electrical, and...
Consulting-Specifying Engineer magazine is dedicated to encouraging and recognizing the most talented young individuals...
The MEP Giants program lists the top mechanical, electrical, plumbing, and fire protection engineering firms in the United States.
Combined heat and power; Assessing replacement of electrical systems; Energy codes and lighting; Salary Survey; Fan efficiency
Commissioning lighting control systems; 2016 Commissioning Giants; Design high-efficiency hot water systems for hospitals; Evaluating condensation and condensate
Solving HVAC challenges; Thermal comfort criteria; Liquid-immersion cooling; Specifying VRF systems; 2016 Product of the Year winners
Driving motor efficiency; Preventing Arc Flash in mission critical facilities; Integrating alternative power and existing electrical systems
Putting COPS into context; Designing medium-voltage electrical systems; Planning and designing resilient, efficient data centers; The nine steps of designing generator fuel systems
Designing generator systems; Using online commissioning tools; Selective coordination best practices
As brand protection manager for Eaton’s Electrical Sector, Tom Grace oversees counterfeit awareness...
Amara Rozgus is chief editor and content manager of Consulting-Specifier Engineer magazine.
IEEE power industry experts bring their combined experience in the electrical power industry...
Michael Heinsdorf, P.E., LEED AP, CDT is an Engineering Specification Writer at ARCOM MasterSpec.
click me