Single-phase harmonic filter reactor

Filter Reactors when used in combination with capacitor bank produces series tuned harmonic filter circuits and when used in combination with capacitor banks and resistors, they form broadband harmonic filter circuits. It is highly recommended to specify thee magnitudes of fundamental and harmonic frequency current while specifying filter reactors. In case of requirement of inductance adjustment for fine-tuning, it is crucial to specify the needed tapping range and tolerance. If the filter applications require Q factor less than the reactor's natural Q, it is achieved by connecting a resistor with the circuit or an economical addition of de-Q'ing ring structure on a reactor. This eliminates the need for installation of damping resistors and significantly reduces the reactor's Q factor as well. The rings mounted on the reactor, offer ease of coupling to the magnetic field of the reactor.