If your voltage amounts are unstable (ie: power stays on, but the particular voltage amount differs a good deal from your 220V typical), then I think that's the kind of circumstance where an AVR is useful. Your browser isn’t supported anymore. Update it to obtain the most effective YouTube knowledge https://bangkok-wax05913.bloggazzo.com/32890777/the-2-minute-rule-for-uninterruptible-power-supply-pronunciation