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This article has been updated in 2023 to reflect current information.
Simply providing an uninterruptible power system (UPS) does not necessarily ensure an institutional or commercial facility’s equipment is protected from power-supply fluctuations and distortions. Maintenance and engineering managers must factor in regular testing and maintenance of a facility’s UPS to ensure it remains in peak operating condition, protects critical systems, and keeps them reliably operating as designed.
Regular equipment testing should be part of a facility’s UPS maintenance schedule. Such a schedule might include the following elements:
If a generator is part of the building’s emergency-power system and feeds the UPS, it also will need to be tested monthly or quarterly. Most facilities have a generator-maintenance schedule in place in which testing frequency is defined.
A UPS typically is sized to carry the load for a short period of time. Longer outages require backup-power generation to maintain critical services. Each facility is unique, and managers need to develop a maintenance schedule to suit each site’s specific needs.
UPS: Preventive Maintenance Ensures Power Supply
UPS Testing: Identify Potential Power Interruptions
UPS Maintenance Checklist