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Jantech Power News October 2012

Several years ago when UPS topology came up as a subject for discussion the first criteria that was established was whether the discussion would revolve around single-phase UPS or three-phase UPS. This distinction was required because certain UPS topologies usually applied to one category and not the other, not necessarily 100% of the time, but certainly in overwhelming majority. The best example (back then) would be UPS that utilize “stand by” (off-line) technology. These were usually simple UPS that switched to battery back-up when the utility had a black-out. The UPS would run until either the utility came back or the battery run time was used up. They are the primary type of UPS a consumer would see for sale at Wal-Mart® or Office Max® style stores.

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