Crest factor (Fc) - Ratio between the peak current value to the rms current value.
IEC (International Electrotechnical Commission) - Advisory organization that draws up international standards in the electrotechnical field.
Output (rated) - Apparent power Pn that the UPS can deliver under given load conditions (power factor = 0.8).
COS phil - A measure of the phase shift between the fundamental current wave and the fundamental voltage wave observed at the terminals of a non-linear load.
Earthing system TT - Earthing system in which the neutral and the exposed conductive parts are directly earthed. The installation must be de-energized immediately in the event of an insulation fault.
AB5 - A metal alloy (e.g., LaNi5) capable of undergoing a reversible hydrogen absorption/desorption reaction as the battery is charged and discharged, respectively.
Constant Current Discharge - A battery discharge regime whereby the current drawn during the discharge remains constant.
