If your voltage amounts are unstable (ie: power stays on, but the particular voltage level differs quite a bit from the 220V standard), then I feel that's the kind of scenario wherever an AVR is helpful. For giant power models, dynamic uninterruptible power supplies (DUPS) are sometimes utilised. A synchronous https://remingtonjpqqq.digiblogbox.com/58545915/the-definitive-guide-to-uninterruptible-power-supply-review