Harmonic source :
A 350 tons full slewing floating crane on the ship for loading and unloading, which composed of five 220 KW inverters and two 160 KW inverters, respectively drive five 160 KW and two 75 KW electric motor.
Solution:
Installed two sets of LiveSine’s Active Power Filter (Model: ACTSine-300-3-A).
Results:
Total current harmonic distortion rate decreased from 26% to below 5%
Harmonic inhibition rate > 95%
Power factor kept > 0.98 consistently.