Parallel UPS Configurations Connecting Multiple UPS Modules for Added Capacity or Redundancy

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Executive Summary

Increasingly, organizations are finding that the risk of running off straight utility power - even briefly - is too great to ignore. So they deploy multiple UPS modules to ensure conditioned power even if one UPS fails. In paralleling, two or more UPSs are electrically and mechanically connected to form a unified system with one output - either for extra capacity or redundancy. In an N+1 redundant configuration, there is at least one more UPS module than needed to support the load. As a conjoined system, each UPS stands ready to take over the load from another UPS whenever necessary, without disrupting protected loads.

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