Nonlinear currents generated by modern power electronic devices cause harmonic pollution and resonance problems in the power grid. Series reactors can suppress harmonics, protect capacitors, improve voltage waveforms, and enhance the power factor in reactive power compensation systems. The STAB tuned reactor prevents parallel resonance through a specific design. Its STAB - R series uses Class H insulation materials and high - quality iron cores, and is formed through a vacuum impregnation process. The optimized air gap reduces losses and noise. It is also equipped with an over - temperature protection function, which can automatically cut off and restore the circuit, reducing the need for frequent maintenance.