Description of Harmonic:
Ideal mains voltage and receiving current’s sinusoidal form in electrical installation. But receiving current is non line eralthought mains voltage is sinus oidal according to electrical power has nonlineer characteristics (These electrical Powers are power electronic harmony, arcfurnaceetc.) soreceiving voltage’swiev form is not sinusoidal. Sinusoidal is exist in the system as voltage and current wiev form’s main frequence (50 hz)’ multiples which is characterlessbut renews against to the time. Current and voltage which are multiples of main frequences resultant with main frequence’s current and voltage and creates current and voltage of the system This resultant’ system current and voltage are not in sinusoidal form any more and wecall this HARMONIC.