Harmonics are periodic distortions of voltage, current, or ability sine waves. Harmonics in ability distribution programs will often be caused by non-linear masses like switched mode dc ability supplies and adjustable pace motor drives.Th? thao B?c th?m t? k?t Cúp C1: Ch? ??i Siêu kinh ?i?n Các ??i th? h?i h?p tr??c l? b?c th?m t? k?t Cúp C1, t