Harmonics are periodic distortions of voltage, recent, or electricity sine waves. Harmonics in ability distribution devices are frequently attributable to non-linear loads such as switched manner dc ability supplies and adjustable speed motor drives.Tr??ng h?p không có ng??i trúng th??ng thì ti?n th??ng c?a gi?i ??c bi?t s? ???c c?ng d?n vào k

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