Harmonic source :
Winch, turntable, mud pump VFD, which are more than 80% of the total capacity of the drilling equipment. VFD of input side has three-phase rectifier circuit, mainly appears 5th, 7th, 11th harmonics.
Solution:
Installed one set of LiveSine’s Active Power Filter (Model: ACTSine-300-1-A).
Results:
Total current harmonic distortion rate decreased from 35% to below 5%
Harmonic inhibition rate > 95%