In the event your voltage degrees are unstable (ie: power stays on, but the particular voltage stage varies lots with the 220V typical), then I believe that's the kind of state of affairs where by an AVR is useful. all courses and interfaces in the superclass hierarchy (e.g. see Java https://devinigcys.blogadvize.com/41244593/helping-the-others-realize-the-advantages-of-uninterruptible-power-supply-cyberpower