Harmonics are periodic distortions of voltage, latest, or ability sine waves. Harmonics in electrical power distribution units are frequently due to non-linear hundreds including switched manner dc power materials and adjustable pace motor drives.HLV Simone Inzaghi ?au ??n khi Inter phung phí nhi?u c? h?i, ?ánh r?i l?i th? d?n hai bàn r?i thua A