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Harmonic reactors connected to capacitors create a series resonant circuit (typically 189 Hz) that suppresses unwanted resonance and also acts as a wide-band filter. This protects individual components of the compensation system from overload. Reactors are characterized by high linearity and low losses. It is generally recommended to use reactors with a voltage distortion THD greater than 3%.

Voltage:  230 – 1000 VAC
Power:  1 – 100 kvar
Frequency:  50/60 Hz
Attenuation:  5.67%, 7%, 14%

Frequent use of power electronic devices with nonlinear loads creates harmonic distortion in the electrical system. This non-sinusoidal load increases the effective current of the power capacitor and other system components, increasing the likelihood of capacitor resonance with other inductive loads.

Ultimately, this can lead to installation problems and even failure. The solution is to use detuning (  filtering  ) reactors, which form a series resonant circuit with the power capacitors.  This harmonic system  protects the installation from resonant effects and also acts as a filter for higher harmonic content. Generally, the use of detuning reactors is recommended when the total voltage distortion (THD-U) is greater than 3%.

Tuning reactors  are manufactured from high-quality, low-loss transformer sheet metal, with windings made of copper wire or aluminum tape. The iron core is designed with multiple air gaps to ensure high current linearity and low thermal losses. It is impregnated with high-quality epoxy resin to ensure good insulation, low noise, and long life. The reactors are equipped with thermal protection to prevent overheating.

Lower-rated reactors are designed with copper wire and outputs via terminal blocks or cable lugs. Higher-rated reactors are manufactured from aluminum tape with outputs in the form of aluminum rods (copper outputs are also available upon request).