When your voltage levels are unstable (ie: power stays on, but the particular voltage stage varies a great deal within the 220V regular), then I feel that's the type of circumstance the place an AVR is helpful. For large power models, dynamic uninterruptible power materials (DUPS) are sometimes employed. A https://byd-dolphin82692.blog-kids.com/34013185/5-simple-statements-about-uninterruptible-power-supply-definition-explained