Power line conditioner
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A Power Line Conditioner is used to compensate peaks and valleys in the power supply and reduce peaks in the power flow to what is needed by the machine. For instance, on a 120 volt service, if the voltage exceeds 130 volts, the output is switched to a transformer that reduces the voltage by about 8% to keep it closer to 120 volts. The same is true if the voltage drops below 110 volts, the output switches to a different transformer that increases voltage by about 9%. However, if the voltage drops below 90 volts, or exceeds 140 volts, the power is shut off.
A conditioner also attempts to remove noise in the line, probably through the use of a low pass filter. This reduces frequencies above 60 Hz.
