ANHPDIt is a new type of protective device used to filter out high-order harmonics and protect precision instruments and equipment, using ultra microcrystalline alloy materials and innovative specialCircuit. It mainly consists of voltage clamping, low-pass filter, and absorber, which can not only suppress and absorb the random high-order harmonics generated by user electrical equipmentInterference with high-frequency noise, pulse spikes, surges, etc., and the ability to track voltage waveforms at any time, instantly filter out spikes, surges, and clutter in the power supply, and correct errorsThe high-order harmonics generated by harmonic effects eliminate harmonic pollution from the source and provide protection for electrical equipment.