Emerson Network Power - Static UPS Application Design Guidance

Static UPS Application Design Guidance, Technical Data & Dimensions

Static UPS systems provide continuous AC power protection by powering the system load via the inverter. This ensures that the voltage and frequency supplied to the system load are always within close tolerances. In the event of a mains failure, the inverter continues to support the system load drawing its DC power from the system battery or from alternative storage energy systems. Unlike some other types of UPS system, a static UPS is able to take advantage of the full power of the AC incoming supply via its static bypass switch for load fault clearing if this is required at any time.

Chloride and Liebert static UPS systems of Emerson Network Power draw power at near unity power factor. This minimises the input current required for any given load power and enables more true power to be drawn from an AC supply of a given current rating.

The ease of operating units in parallel for higher power and/or for ‘N+1’ redundancy and the quest for higher operating efficiencies means that many users now tend to utilize multiple lower power parallel units so that the “+1” is a relatively small capacity enabling a high ratio of load to UPS capacity to be achieved.

Chloride and Liebert UPS systems with IGBT inverters can support any leading or lagging load power factor and all non-linear computer loads. Thus modern power factor corrected system loads are not a problem for the UPS which effectively means that the user need not have any concerns about load compatibility since the UPS will be suitable for any present or future electrical load.

Dimensions of Single UPS Systems & Batteries