Power Shield UPS Knowledge Base

What are the different Uninterruptible Power Systems and how do they differ?

in FAQ

There are three distinctly different UPS systems that you can purchase. They are the Back-Up (stand-by) system, the Line Interactive system and the True Online Double Conversion System.
Backup systems provide a low level of power filtration but are installed primarily for battery backup in case of a power outage.
Line Interactive UPS’s apply automatic voltage regulation (AVR) which bucks and boosts the electrical signal so that it maintains a standard of +/- 240 volts. These UPS’s can apply this AVR to an input variance of 30 percent before sending it into battery backup. This means that it can manage dips and surges from 168 to 312 volts without the battery being employed. Once the voltage dips below or surges higher than this range, the battery will take over, promising cleaner power for your sensitive electronic systems.
The True Online Double Conversion UPS actually takes the AC current coming into the system, converts it to DC and then back to AC for the running of crucial electronic components. This True Online system is the best because it insures that the power entering your equipment is totally independent of the power that is entering the building. This is extremely important if information and reliability are crucial to the operation. This refers to businesses who trade online, medical equipment and crucial servers. The True Online Double Conversion UPSes present the highest degree of power filtration.