When your voltage amounts are unstable (ie: power stays on, but the particular voltage amount differs a lot through the 220V conventional), then I believe that's the type of situation in which an AVR is helpful. For large power models, dynamic uninterruptible power supplies (DUPS) are sometimes employed. A synchronous https://condonearme82581.articlesblogger.com/56313750/ups-uninterrupted-power-supply-secrets