Measuring Harmonics

Harmonic analysis is the process of calculating the magnitudes and phases of the fundamental and higher order harmonics of the periodic waveform.
Today we have true rms instruments from various manufacturers, that can provide all the information we need to consider the harmonic mitigation requirements. An example of such instruments would be BMI - 3030 1 or Fluke - 43B. If instrumentation data is not available, mathematical calculations based on available information can also assist to size an AIM Filter.

Sizing an AIM Active Harmonic Filter

• Size of AHF is based on the Harmonic Current
• Multiple loads one Filter; Size for total Harmonics
• VSD with 3% input line reactor; multiplier 0.35
• SCR with 5% input line reactor; multiplier 0.40
• Get one-line diagram indicating:
  • Number of loads
  • Type of Loads
  • Redundancy
  • Source impedance
    
• Take measurements via Instrumentation i.e. BMI-3030 1 or Fluke 43B

There are three standard voltage ratings of AIM Active Harmonic Filters - 208V / 380V / 480V.
There are seven current ratings of AIM Active Harmonic Filters - 25A / 50A / 100A / 150A / 200A / 300A / 400A. Higher ratings are achieved by paralleling AIMs (up to 1000A).

For assistance sizing an AIM Filter please contact us. AIM Europe also offer full Harmonic Surveys, where your site is visited, measurements taken and results reported. To receive a quotation please contact us.