How Do You Know Which Uninterruptible Power Supply To Purchase?
An uninterruptable power supply is a safety backup device that monitors incoming electric activates its own battery pack to supply power in case of an external power interruption. Computers, SCADA systems and critical medical or production equipment protected by the UPS will not detect interruption in power supply and will continue to run during a temporary power dip or brown-out. Determine the worst-case demand in power and time that you will need to have covered. Multiply the voltage rating of the equipment being protected times the equipment’s usage at its heaviest current demand. This will give you the worst-case demand in volt-amps (VA). Most UPS systems will be rated by VA or KVA, thousands of volt-amps. The cost of a UPS system will be determined largely by the worst-case demand in volt-amps and time. A realistic estimate of how long the UPS will need to supply the KVA demand will determine the UPS capacity. For power dips and short brownouts, a 1/2-hour capacity should be more
