Harmonics are periodic distortions of voltage, present, or electricity sine waves. Harmonics in energy distribution techniques tend to be a result of non-linear loads for example switched mode dc electric power materials and adjustable speed motor drives.Tây Ban Nha Pau Cubarsi, ? 17 tu?i fifty ngày, tr? thành c?u th? tr? nh?t ra m?t trong m?t t