480V power quality solutions has the best compatibility for low voltage grid(3 phase 4 wire).ZDDQ has full series 480V devices for power quality improvement and power factor correction.

480V Active Power Filter

Active Power Filter has various compensation modes (harmonic, reactive power, three-phase unbalance and capacitor switching control), which can simultaneously make the said various compensation, and the proportion of compensation capacity by harmonic, reactive power, and three-phase unbalance can also be set, comprehensively solving the problem of power quality for 480V voltage grid.

Static Var Generator can dynamically and smoothly compensate inductive and capacitive reactive power, and the power factor of the system after compensation is greater than 0.99 at 480V voltage grid.

480V Active Harmonic Filter

AHF is connected in parallel with non-linear loads, and uses one set of current transformers (CT) to detect the load current. It calculates each order harmonic current by FFT algorithms in its DSP microchips, and then generates a compensating current with the same amplitude but opposite phase angles to the detected harmonic current, which cancels out the original load harmonics at 480V side .