Finland chenahoya electric control co., LTD in 2005, development developed on behalf of the international advanced level of CHHPA type harmonic purification apparatus. CHHPA type harmonic purification apparatus whole series of products have passed the European CE certification. It can widely absorbed within 1 KHZ to 30 MHZ bandwidth of various energy interference of harmonics, the harmonic elimination in placing signage at, so as to automatically eliminate random higher harmonic in electric equipment and high frequency noise. At the same time of pulse peak, surge and protection function. CHHPA clean type of harmonic purification apparatus can maximum power supply, protection of electrical equipment and power factor compensation device, prevent protection mistrip, implementation in harmonic environment protection control equipment, from harmonic wave. Such as: the precision equipment, computer, PLC, sensors, wireless devices such as protection, and vigorously support equipment security, stability, sustainable, efficient operation.