Should your voltage concentrations are unstable (ie: power stays on, but the particular voltage stage differs a lot from the 220V normal), then I believe that's the kind of state of affairs in which an AVR is helpful. Though I would not be concerned excessive about what very poor power https://condo-near-me38271.is-blog.com/40305123/the-basic-principles-of-ups-uninterrupted-power-supply