Power quality problems: the factory has single crystal furnace, multi crystal furnace, PECVD and other loads. These loads produced a lot of harmonics and cause endanger to the power supply safety
Power quality solution: install Hoteam active harmonic filter
Phase current waveform before
Phase current waveform after AHF
Phase current harmonic before
Phase current harmonic after AHF
1）After operation of active harmonic filter, both voltage and current waveform had been improved.
2）The THDv reduced from 4.7% to 2.4%. The THDi reduced from 18.4% to 5.0%.