The three-phase imbalance compensation device is mainly used on the low-voltage distribution user side to control three-phase current imbalance, low phase voltage, and compensate for reactive power, optimizing power quality. The JN series SPC product specifications cover 30A/20kVar, 50A/35kVar, 75A/50kVar, 150A/100kVar, and can simultaneously compensate for three-phase unbalanced current and reactive power, achieving continuous and dynamic compensation, solving the problem of three-phase imbalance in the distribution network, reducing line losses, stabilizing three-phase voltage, improving power supply quality, improving the electricity environment, solving the problem of single-phase overload in transformers, improving transformer operation life, reactive power balance, and increasing the effective output capacity of the distribution network.