Shop line-interactive uninterruptible power supplies designed to provide battery backup and help correct selected voltage variations without continuously operating from the battery. These UPS systems are commonly used for computers, communication equipment, network devices, industrial controls and other electronic loads.
Compare line-interactive UPS systems by input and output voltage, VA and watt capacity, battery runtime, automatic voltage regulation, outlet configuration, mounting style and communication features. Size the UPS for the complete connected load and required backup duration.
A line-interactive UPS normally powers connected equipment from the incoming electrical source while maintaining a charged battery for backup. Many designs include automatic voltage regulation that can correct selected high- or low-voltage conditions without switching to battery operation.
Line-interactive systems are often selected when equipment requires battery backup and voltage regulation but does not require the continuous double-conversion architecture of an online UPS.
A line-interactive UPS normally supplies equipment directly from utility power and uses voltage-regulation circuitry before switching to battery when necessary. An online UPS continuously supplies the load through its inverter. The appropriate topology depends on the sensitivity of the connected equipment and the power-quality problems present at the installation.