Passive Harmonic Filter
Passive Harmonic filters are constructed from a combination of power components that may include resistors, inductors and capacitors. In power systems, simple passive filters are usually constructed from capacitors and inductors, and are tuned for a specific frequency of interest.
Passive filters are series capacitor and reactor resonant circuits ‘tuned’ to present a high impedance path to the fundamental frequency and low impedance path to higher specific frequencies (i.e. 5th - 250Hz, 7th - 350Hz). They are more commonly connected to individual loads in the plant rather than at the point of common coupling (PCC) since they’re application requires consistent loading for effective harmonic mitigation.
- ECOsine™ harmonic filters for 50Hz systems
- FN3410 for diode rectifiers
- FN3411 for thyristor (SCR) rectifiers
Filter Selection Table