This device significantly improves power factor, reduces line loss, enhances transformer load capacity, and achieves significant energy savings. Equipped with specific reactors to effectively suppress harmonic amplification, absorb harmonic currents, and ensure that harmonic indicators meet national standards. Compared to ordinary contactors, this dynamic reactive power compensation device avoids issues such as large surge currents, long compensation times, high maintenance costs, and short lifespan. Recommended for low-voltage power grids in industrial and mining enterprises, production workshops, and civil buildings, especially for systems with large load changes and unstable reactive power. Compliant with standards such as GB/T15576-2008 and IEC60439.