Harmonic Filtering

In connection with reactive power compensa­tion, power quality should also be considered. Harmonic filtering reduces the risk of technical faults and disturbances. Voltage distortion resulting from harmonic currents are caused by inverters, DC drives, fluorescent lighting, converters, ups, are furnaces, etc. In practice harmonic currents are everywhere. Harmonic filtering brings a number of bonuses:

	disturbances in telecommunications and data transmission are minimized.
	electronics, control systems, converters, motors and generators operate without interruption
	no risk of overloading cables, nuisance tripping of relays or fuses

Poor power quality may remain unnoticed for a long time. Quality deficiency may easily bring extra costs in the form of high electricity bills and an oversized power system.