6. Harmonics
1) Phenomenon
Voltage or current waveform distortion
2) Cause
3) Damage
Thyristor powered conversion devices
Inverter, Variable frequency drives
Overheating, burning, abnormal sounds or
vibration sound caused by the inflow of
harmonic current to the equipment
Malfunctions due to the harmonics voltage
(overheating or burning of reactor for
phase advancing capacitor)
7. Flicker
1) Phenomenon
Regularly repeated voltage impulses spanning
one or more cycles which cause flicker in the
lighting device
2) Cause
3) Damage
Arc/blast furnaces
Arc welding
Flicker in the lighting device
Equipment malfunction
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