UPS Calculator
Decide the duration for which you need the UPS to support the devices during a power failure. This duration is generally measured in minutes. With the calculated VA rating
An uninterruptible power supply (UPS) is an electrical device that provides emergency power to connected equipment when the main power source (typically utility power) fails. It conditions incoming power to ensure clean and uninterrupted power, protects devices from power problems and enables seamless system shutdown during complete outages.
Typically, according to different working principles, UPS power supply covers standby (offline) UPS, line-interactive UPS, online (double-conversion) UPS. The standby UPS system offers only the most basic features, providing surge protection and battery backup. Thus, its power supply quality is not good enough and the cost is much lower.
A quick note on naming conventions In the context of tech hardware, the acronym UPS stands for uninterruptible power supply, and so technically the phrase 'UPS power supply' is a handy example of RAS syndrome (along with 'PIN number' and 'LCD display')!
Not all equipment needs to be supported, so reviewing all your equipment and breaking it down into a list of either critical load or non-critical load can help make sure your final uninterruptible power supply size requirement is not drastically oversized.
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