Increasingly, organizations are knowing that the risk of running off straight utility power-even briefly-is too great to ignore. So they place several UPS modules to make sure the conditioned power is available even if one UPS fails. In paralleling, two or more UPSs are mechanically and electrically
connected to form a unified system with one output-either for spare capacity or redundancy. In an N+1 redundant configuration, people would have at least one more UPS module than requested to support the load. As a conjoined system, each UPS stands ready to take over the load from another UPS whenever it is necessary, without disrupting protected loads.
Nonstop availability of critical systems depends on nonstop performance from the power delivery architecture under all sorts of conditions. Reliable UPS technology is a vital foundation of defense, but maximum reliability comes with redundancy.
Where maximum availability and power protection are critical, parallel UPS configurations provide numerous advantages over separate, redundant UPSs. Parallel UPS modules is able to continuously share the load and automatically take over for a failed parts without disrupting power quality to the critical load, and without unduly stressing the UPSs, other power components.
The newest paralleling technologies offer significant benefits, compared to traditional approaches. For one, there is no system-level single point-of-failure. With a peer-to-peer control strategy, each UPS module operates independently and is not reliant on an external master controller or a complex web of inter-module control wiring. In fact, no added circuitry or components are required for a UPS module to be switched in to operate in parallel.