When your voltage levels are unstable (ie: power stays on, but the particular voltage amount differs a whole lot from the 220V standard), then I believe that's the type of scenario where an AVR is useful. Your browser isn’t supported any more. Update it to obtain the most effective YouTube https://wordpress-website-service27159.look4blog.com/72119152/5-simple-statements-about-uninterruptible-power-supply-definition-explained