Active harmonic filters (AHF)/Active Power filter (APF) are typically stand-alone devices that reduce the high levels of harmonics produced by energy efficient non-linear loads. They work by injecting harmonics into the electrical system in equal and opposite measure to the existing system harmonics. As previously mentioned, harmonic filters are used to eliminate harmonic distortion caused by excess currents in and out of appliances. It can prevent large quantities of harmonics from causing damage to equipment, downtime of operation, and preventing an increase in operating costs.

Benefits of installing an Active Harmonic Filter