What are the reactance rates for low-voltage filtering reactors?

The reactance rate is a key parameter measuring a reactor's impedance capability against AC signals, typically denoted as "X" with the unit ohm (Ω). In power systems, the reactance rate of a reactor directly affects the stability and reliability of the power grid's operation.

6% Reactance Rate:
Typically used to suppress the 5th harmonic, suitable for low-order harmonics generated by devices such as variable frequency drives or other non-linear loads. This reactance rate can effectively reduce harmonic amplification and protect capacitors.

7% Reactance Rate:
Primarily used to suppress the 5th and 7th harmonics, commonly found in industrial settings, especially where the load harmonic current is significant.

12% Reactance Rate:
Used to suppress the 3rd harmonic, mainly applicable in scenarios with three-phase unbalanced loads or systems containing a large number of single-phase rectifier devices in the power grid.

14% Reactance Rate:
Primarily used to filter out multiple harmonics such as the 3rd, 5th, and 7th, suitable for environments with severe harmonic pollution.

Different reactance rates are applicable to different harmonic suppression needs. The higher the reactance rate, the stronger the filter's suppression effect on low-order harmonics. However, the voltage across the capacitor also increases accordingly. Therefore, when selecting a reactance rate, it is essential to comprehensively consider the harmonic characteristics and voltage level of the system.