August 21, 2008
Motor Testing Tip
Why is it Important to Monitor Total Harmonic Distortion?
Total Harmonic Distortion (THD) is the ratio of the root mean square of the harmonic content to the root mean square value of the fundamental quantity. It is expressed as a percent of the fundamental. The presence of harmonic distortion in the applied voltage to a motor will increase electrical losses and decrease efficiency. These losses increase motor temperature, which could result in insulation damage and possible failure.
Tip provided by PdMA MCE Division
Tel: 813-621-6463
http://www.pdma.com
Download Advanced Spectral Analysis (PDF) from PdMA
