What information is needed to size an Active Harmonic Filter

The following information is all required in order to correctly size an active harmonic filter:

  • One-line diagram of the system. Location and size of VFD’s and Power Factor Correction Capacitors is very useful.
  • Detailed equipment lists can also be used, especially in conjunction with one-line diagrams.
  • VFD information: Horse Power or Current size.
  • Are line reactors being used with each VFD? If so what is the impedance?
  • Will the active filters operate on generator?
  • Are there any large soft start loads located downstream of the AHF?
  • Local Environmental Conditions