The Benefits of UPS System Scalability

Modular UPS systems are scaleable, making them 'future proof'. Anticipating growth of the critical load can be difficult. Purchasing a modular UPS system, for example the PowerWAVE9000DPA Series TM offers true flexibility. It is supplied with a free-standing cabinet that accommodates up to five rack-mountable UPS modules. Initially, if the load is less than the power rating of one UPS module, the cabinet could be populated by two UPS modules to provide '1+1' parallel-redundancy.

Later, if the size of the critical load were to require it, the cabinet could be populated by five modules. If the critical load were to demand, for example between 60% and 80% of the total capacity of the UPS system, the system would be described as operating '4+1' parallel-redundant mode. (Note: If the critical load were to demand between 80% and 100% of the total capacity of the UPS system, the system would be described as operating 5+0). Populating slots with UPS modules in single cabinets is commonly referred to as 'vertical scalability'.

If the size of the critical load were to increase beyond the capacity of a single cabinet, additional cabinet(s) that are partially (or fully) populated by UPS modules, could be connected in parallel to the first cabinet. Increasing the capacity of a UPS system in this way is commonly referred to as 'horizontal scalability'. Right-sizeability of a UPS system has a diminishing effect on its total cost of ownership.
 

The limited flexibility of "free standing" UPS requires the initial installed power to equal the Data Centre's full capacity requirements	The modular and scalable design of the PowerWAVE9000DPA is easily reconfigured to increase the UPS power in cost-effective incremental steps to match the needs of the critical load.

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