Harmonic pollution on a power line can be quantified by a measure
known as total harmonic distortion or THD.1 High harmonic distortion can
negatively impact a facility’s electric distribution system, and can generate
excessive heat in motors, causing early failures. Heat also builds up
in wire insulation causing breakdown and failure. Increased operating temperatures
can affect other equipment as well, resulting in malfunctions and
early failure. In addition, harmonics on the power line can prompt computers
to restart and adversely affect other sensitive analog circuits.