Harmonics are periodic distortions of voltage, present, or electric power sine waves. Harmonics in power distribution programs will often be attributable to non-linear hundreds which include switched mode dc energy provides and adjustable speed motor drives.Ngoài ra, ng??i ch?i s? ???c h??ng ?ãi ng? t??ng t? nh? khách hàng VIP ? nh?ng n?i khác