You may be forgiven for thinking that sizing a UPS system is straightforward. There are, after all, many hundreds of online tools, tables and calculators available to help you do it. However, there are a number of items to bear in mind when sizing a power protection system and a little time spent at the outset of planning it will pay dividends in the long run.
If a UPS is oversized (grossly), it will run inefficiently. Conversely, if it is undersized for its application and thus having to run at (or close to) full capacity, it will be akin to driving a family saloon at top speed continuously – it will very soon wear out!
Of course, it is common practice to oversize a UPS (by around 25% larger than the total capacity required by connected loads) and this is because the system needs to be able to cope with potential overload conditions that can be caused by certain types of load and the characteristics of the electricity distribution network within the facility.
If you’d like more information on this, and to understand a little more about load size and type, UPS energy efficiency and sizing for redundancy and autonomy, click here to read a blog post on Riello UPS’s corporate site. Riello also offers free site surveys that enable UPS system right-sizing.