Leakage Current

Leakage Current

A term relating to current flowing between the AC supply wires and earth ground. The term does not necessarily denote a fault condition. In power supplies, leakage current usually refers to the 60 Hertz current which flows through the EMI filter capacitors which are connected between the AC lines and ground (Y caps).

Over Voltage

Over Voltage

An abnormally high voltage sustained for an extended period.

Buck and Boost

Buck and Boost

A function to adjust the output of UPS. When the voltage is under normal condition then the UPS will boost the voltage higher. When the voltage is over normal condition then the UPS will buck the voltage lower.

Harmonic Distortion

Harmonic Distortion

Distortion of an electrical sine wave caused by the power supplies of certain electronic devices. A mathematical representation of a distortion of a pure sine waveform.