Harmonic Filter Resistors
Electrical equipment which has non-linear characteristics creates harmonic currents that can lead to distortions of the network power. The increased usage of equipment such as arc furnaces and static converters during recent years, has forced electric companies to control and limit the harmonic distortion rate of their distribution networks, with respect to the directives of many National Committees such as the CEI, CENELEC, IEEE.etc.
Harmonic Filtering Networks are passive circuits that have the double function of lowering the distortions caused by harmonics and balancing the power factor. Harmonic Filters, made up of capacitor, inductor and resistor assemblies help to eliminate harmonics which inevitably tend to occur. The LC circuit filters all spurious frequencies and only allows the fundamental frequency through, while the Harmonic Filter Resistors (also referred to as Damping Resistors) dissipate harmonic currents in the form of heat energy.